add vendor code

Godeps/Godeps.json

@@ -1,10 +1,97 @@
 {
 	"ImportPath": "github.com/gostor/gotgt",
-	"GoVersion": "go1.4.1",
+	"GoVersion": "go1.6",
+	"Packages": [
+		"./..."
+	],
 	"Deps": [
+		{
+			"ImportPath": "github.com/Sirupsen/logrus",
+			"Comment": "v0.10.0-19-gf3cfb45",
+			"Rev": "f3cfb454f4c209e6668c95216c4744b8fddb2356"
+		},
+		{
+			"ImportPath": "github.com/coreos/go-systemd/activation",
+			"Comment": "v9",
+			"Rev": "6dc8b843c670f2027cc26b164935635840a40526"
+		},
+		{
+			"ImportPath": "github.com/docker/distribution/registry/api/errcode",
+			"Comment": "v2.1.1-2-g77c6d9d",
+			"Rev": "77c6d9deb9b26653b4a264bbb2fd634ac927df7f"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/archive",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/fileutils",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/idtools",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/ioutils",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/pools",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/promise",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/random",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/stringid",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/pkg/system",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/docker/utils",
+			"Rev": "325cacb1e0edb4286b042cdb22d8bba76b8743d4"
+		},
+		{
+			"ImportPath": "github.com/docker/go-connections/sockets",
+			"Comment": "v0.2.0-8-g990a1a1",
+			"Rev": "990a1a1a70b0da4c4cb70e117971a4f0babfbf1a"
+		},
 		{
 			"ImportPath": "github.com/golang/glog",
-			"Rev": "fca8c8854093a154ff1eb580aae10276ad6b1b5f"
+			"Rev": "23def4e6c14b4da8ac2ed8007337bc5eb5007998"
+		},
+		{
+			"ImportPath": "github.com/gorilla/context",
+			"Rev": "215affda49addc4c8ef7e2534915df2c8c35c6cd"
+		},
+		{
+			"ImportPath": "github.com/gorilla/mux",
+			"Rev": "8096f47503459bcc74d1f4c487b7e6e42e5746b5"
+		},
+		{
+			"ImportPath": "github.com/spf13/cobra",
+			"Rev": "1238ba19d24b0b9ceee2094e1cb31947d45c3e86"
+		},
+		{
+			"ImportPath": "github.com/spf13/pflag",
+			"Rev": "367864438f1b1a3c7db4da06a2f55b144e6784e0"
+		},
+		{
+			"ImportPath": "golang.org/x/net/context",
+			"Rev": "d9558e5c97f85372afee28cf2b6059d7d3818919"
+		},
+		{
+			"ImportPath": "golang.org/x/net/proxy",
+			"Rev": "d9558e5c97f85372afee28cf2b6059d7d3818919"
 		}
 	]
 }

Godeps/_workspace/src/github.com/Sirupsen/logrus/.gitignore

@@ -0,0 +1 @@
+logrus

Godeps/_workspace/src/github.com/Sirupsen/logrus/.travis.yml

@@ -0,0 +1,10 @@
+language: go
+go:
+  - 1.3
+  - 1.4
+  - 1.5
+  - 1.6
+  - tip
+install:
+  - go get -t ./...
+script: GOMAXPROCS=4 GORACE="halt_on_error=1" go test -race -v ./...

Godeps/_workspace/src/github.com/Sirupsen/logrus/CHANGELOG.md

@@ -0,0 +1,66 @@
+# 0.10.0
+
+* feature: Add a test hook (#180)
+* feature: `ParseLevel` is now case-insensitive (#326)
+* feature: `FieldLogger` interface that generalizes `Logger` and `Entry` (#308)
+* performance: avoid re-allocations on `WithFields` (#335)
+
+# 0.9.0
+
+* logrus/text_formatter: don't emit empty msg
+* logrus/hooks/airbrake: move out of main repository
+* logrus/hooks/sentry: move out of main repository
+* logrus/hooks/papertrail: move out of main repository
+* logrus/hooks/bugsnag: move out of main repository
+* logrus/core: run tests with `-race`
+* logrus/core: detect TTY based on `stderr`
+* logrus/core: support `WithError` on logger
+* logrus/core: Solaris support
+
+# 0.8.7
+
+* logrus/core: fix possible race (#216)
+* logrus/doc: small typo fixes and doc improvements
+
+
+# 0.8.6
+
+* hooks/raven: allow passing an initialized client
+
+# 0.8.5
+
+* logrus/core: revert #208
+
+# 0.8.4
+
+* formatter/text: fix data race (#218)
+
+# 0.8.3
+
+* logrus/core: fix entry log level (#208)
+* logrus/core: improve performance of text formatter by 40%
+* logrus/core: expose `LevelHooks` type
+* logrus/core: add support for DragonflyBSD and NetBSD
+* formatter/text: print structs more verbosely
+
+# 0.8.2
+
+* logrus: fix more Fatal family functions
+
+# 0.8.1
+
+* logrus: fix not exiting on `Fatalf` and `Fatalln`
+
+# 0.8.0
+
+* logrus: defaults to stderr instead of stdout
+* hooks/sentry: add special field for `*http.Request`
+* formatter/text: ignore Windows for colors
+
+# 0.7.3
+
+* formatter/\*: allow configuration of timestamp layout
+
+# 0.7.2
+
+* formatter/text: Add configuration option for time format (#158)

Godeps/_workspace/src/github.com/Sirupsen/logrus/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Simon Eskildsen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Godeps/_workspace/src/github.com/Sirupsen/logrus/README.md

@@ -0,0 +1,390 @@
+# Logrus <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:"/>&nbsp;[![Build Status](https://travis-ci.org/Sirupsen/logrus.svg?branch=master)](https://travis-ci.org/Sirupsen/logrus)&nbsp;[![GoDoc](https://godoc.org/github.com/Sirupsen/logrus?status.svg)](https://godoc.org/github.com/Sirupsen/logrus)
+
+Logrus is a structured logger for Go (golang), completely API compatible with
+the standard library logger. [Godoc][godoc]. **Please note the Logrus API is not
+yet stable (pre 1.0). Logrus itself is completely stable and has been used in
+many large deployments. The core API is unlikely to change much but please
+version control your Logrus to make sure you aren't fetching latest `master` on
+every build.**
+
+Nicely color-coded in development (when a TTY is attached, otherwise just
+plain text):
+
+![Colored](http://i.imgur.com/PY7qMwd.png)
+
+With `log.SetFormatter(&log.JSONFormatter{})`, for easy parsing by logstash
+or Splunk:
+
+```json
+{"animal":"walrus","level":"info","msg":"A group of walrus emerges from the
+ocean","size":10,"time":"2014-03-10 19:57:38.562264131 -0400 EDT"}
+
+{"level":"warning","msg":"The group's number increased tremendously!",
+"number":122,"omg":true,"time":"2014-03-10 19:57:38.562471297 -0400 EDT"}
+
+{"animal":"walrus","level":"info","msg":"A giant walrus appears!",
+"size":10,"time":"2014-03-10 19:57:38.562500591 -0400 EDT"}
+
+{"animal":"walrus","level":"info","msg":"Tremendously sized cow enters the ocean.",
+"size":9,"time":"2014-03-10 19:57:38.562527896 -0400 EDT"}
+
+{"level":"fatal","msg":"The ice breaks!","number":100,"omg":true,
+"time":"2014-03-10 19:57:38.562543128 -0400 EDT"}
+```
+
+With the default `log.SetFormatter(&log.TextFormatter{})` when a TTY is not
+attached, the output is compatible with the
+[logfmt](http://godoc.org/github.com/kr/logfmt) format:
+
+```text
+time="2015-03-26T01:27:38-04:00" level=debug msg="Started observing beach" animal=walrus number=8
+time="2015-03-26T01:27:38-04:00" level=info msg="A group of walrus emerges from the ocean" animal=walrus size=10
+time="2015-03-26T01:27:38-04:00" level=warning msg="The group's number increased tremendously!" number=122 omg=true
+time="2015-03-26T01:27:38-04:00" level=debug msg="Temperature changes" temperature=-4
+time="2015-03-26T01:27:38-04:00" level=panic msg="It's over 9000!" animal=orca size=9009
+time="2015-03-26T01:27:38-04:00" level=fatal msg="The ice breaks!" err=&{0x2082280c0 map[animal:orca size:9009] 2015-03-26 01:27:38.441574009 -0400 EDT panic It's over 9000!} number=100 omg=true
+exit status 1
+```
+
+#### Example
+
+The simplest way to use Logrus is simply the package-level exported logger:
+
+```go
+package main
+
+import (
+  log "github.com/Sirupsen/logrus"
+)
+
+func main() {
+  log.WithFields(log.Fields{
+    "animal": "walrus",
+  }).Info("A walrus appears")
+}
+```
+
+Note that it's completely api-compatible with the stdlib logger, so you can
+replace your `log` imports everywhere with `log "github.com/Sirupsen/logrus"`
+and you'll now have the flexibility of Logrus. You can customize it all you
+want:
+
+```go
+package main
+
+import (
+  "os"
+  log "github.com/Sirupsen/logrus"
+)
+
+func init() {
+  // Log as JSON instead of the default ASCII formatter.
+  log.SetFormatter(&log.JSONFormatter{})
+
+  // Output to stderr instead of stdout, could also be a file.
+  log.SetOutput(os.Stderr)
+
+  // Only log the warning severity or above.
+  log.SetLevel(log.WarnLevel)
+}
+
+func main() {
+  log.WithFields(log.Fields{
+    "animal": "walrus",
+    "size":   10,
+  }).Info("A group of walrus emerges from the ocean")
+
+  log.WithFields(log.Fields{
+    "omg":    true,
+    "number": 122,
+  }).Warn("The group's number increased tremendously!")
+
+  log.WithFields(log.Fields{
+    "omg":    true,
+    "number": 100,
+  }).Fatal("The ice breaks!")
+
+  // A common pattern is to re-use fields between logging statements by re-using
+  // the logrus.Entry returned from WithFields()
+  contextLogger := log.WithFields(log.Fields{
+    "common": "this is a common field",
+    "other": "I also should be logged always",
+  })
+
+  contextLogger.Info("I'll be logged with common and other field")
+  contextLogger.Info("Me too")
+}
+```
+
+For more advanced usage such as logging to multiple locations from the same
+application, you can also create an instance of the `logrus` Logger:
+
+```go
+package main
+
+import (
+  "github.com/Sirupsen/logrus"
+)
+
+// Create a new instance of the logger. You can have any number of instances.
+var log = logrus.New()
+
+func main() {
+  // The API for setting attributes is a little different than the package level
+  // exported logger. See Godoc.
+  log.Out = os.Stderr
+
+  log.WithFields(logrus.Fields{
+    "animal": "walrus",
+    "size":   10,
+  }).Info("A group of walrus emerges from the ocean")
+}
+```
+
+#### Fields
+
+Logrus encourages careful, structured logging though logging fields instead of
+long, unparseable error messages. For example, instead of: `log.Fatalf("Failed
+to send event %s to topic %s with key %d")`, you should log the much more
+discoverable:
+
+```go
+log.WithFields(log.Fields{
+  "event": event,
+  "topic": topic,
+  "key": key,
+}).Fatal("Failed to send event")
+```
+
+We've found this API forces you to think about logging in a way that produces
+much more useful logging messages. We've been in countless situations where just
+a single added field to a log statement that was already there would've saved us
+hours. The `WithFields` call is optional.
+
+In general, with Logrus using any of the `printf`-family functions should be
+seen as a hint you should add a field, however, you can still use the
+`printf`-family functions with Logrus.
+
+#### Hooks
+
+You can add hooks for logging levels. For example to send errors to an exception
+tracking service on `Error`, `Fatal` and `Panic`, info to StatsD or log to
+multiple places simultaneously, e.g. syslog.
+
+Logrus comes with [built-in hooks](hooks/). Add those, or your custom hook, in
+`init`:
+
+```go
+import (
+  log "github.com/Sirupsen/logrus"
+  "gopkg.in/gemnasium/logrus-airbrake-hook.v2" // the package is named "aibrake"
+  logrus_syslog "github.com/Sirupsen/logrus/hooks/syslog"
+  "log/syslog"
+)
+
+func init() {
+
+  // Use the Airbrake hook to report errors that have Error severity or above to
+  // an exception tracker. You can create custom hooks, see the Hooks section.
+  log.AddHook(airbrake.NewHook(123, "xyz", "production"))
+
+  hook, err := logrus_syslog.NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
+  if err != nil {
+    log.Error("Unable to connect to local syslog daemon")
+  } else {
+    log.AddHook(hook)
+  }
+}
+```
+Note: Syslog hook also support connecting to local syslog (Ex. "/dev/log" or "/var/run/syslog" or "/var/run/log"). For the detail, please check the [syslog hook README](hooks/syslog/README.md).
+
+| Hook  | Description |
+| ----- | ----------- |
+| [Airbrake](https://github.com/gemnasium/logrus-airbrake-hook) | Send errors to the Airbrake API V3. Uses the official [`gobrake`](https://github.com/airbrake/gobrake) behind the scenes. |
+| [Airbrake "legacy"](https://github.com/gemnasium/logrus-airbrake-legacy-hook) | Send errors to an exception tracking service compatible with the Airbrake API V2. Uses [`airbrake-go`](https://github.com/tobi/airbrake-go) behind the scenes. |
+| [Papertrail](https://github.com/polds/logrus-papertrail-hook) | Send errors to the [Papertrail](https://papertrailapp.com) hosted logging service via UDP. |
+| [Syslog](https://github.com/Sirupsen/logrus/blob/master/hooks/syslog/syslog.go) | Send errors to remote syslog server. Uses standard library `log/syslog` behind the scenes. |
+| [Bugsnag](https://github.com/Shopify/logrus-bugsnag/blob/master/bugsnag.go) | Send errors to the Bugsnag exception tracking service. |
+| [Sentry](https://github.com/evalphobia/logrus_sentry) | Send errors to the Sentry error logging and aggregation service. |
+| [Hiprus](https://github.com/nubo/hiprus) | Send errors to a channel in hipchat. |
+| [Logrusly](https://github.com/sebest/logrusly) | Send logs to [Loggly](https://www.loggly.com/) |
+| [Slackrus](https://github.com/johntdyer/slackrus) | Hook for Slack chat. |
+| [Journalhook](https://github.com/wercker/journalhook) | Hook for logging to `systemd-journald` |
+| [Graylog](https://github.com/gemnasium/logrus-graylog-hook) | Hook for logging to [Graylog](http://graylog2.org/) |
+| [Raygun](https://github.com/squirkle/logrus-raygun-hook) | Hook for logging to [Raygun.io](http://raygun.io/) |
+| [LFShook](https://github.com/rifflock/lfshook) | Hook for logging to the local filesystem |
+| [Honeybadger](https://github.com/agonzalezro/logrus_honeybadger) | Hook for sending exceptions to Honeybadger |
+| [Mail](https://github.com/zbindenren/logrus_mail) | Hook for sending exceptions via mail |
+| [Rollrus](https://github.com/heroku/rollrus) | Hook for sending errors to rollbar |
+| [Fluentd](https://github.com/evalphobia/logrus_fluent) | Hook for logging to fluentd |
+| [Mongodb](https://github.com/weekface/mgorus) | Hook for logging to mongodb |
+| [Influxus] (http://github.com/vlad-doru/influxus) | Hook for concurrently logging to [InfluxDB] (http://influxdata.com/) |
+| [InfluxDB](https://github.com/Abramovic/logrus_influxdb) | Hook for logging to influxdb |
+| [Octokit](https://github.com/dorajistyle/logrus-octokit-hook) | Hook for logging to github via octokit |
+| [DeferPanic](https://github.com/deferpanic/dp-logrus) | Hook for logging to DeferPanic |
+| [Redis-Hook](https://github.com/rogierlommers/logrus-redis-hook) | Hook for logging to a ELK stack (through Redis) |
+| [Amqp-Hook](https://github.com/vladoatanasov/logrus_amqp) | Hook for logging to Amqp broker (Like RabbitMQ) |
+| [KafkaLogrus](https://github.com/goibibo/KafkaLogrus) | Hook for logging to kafka |
+| [Typetalk](https://github.com/dragon3/logrus-typetalk-hook) | Hook for logging to [Typetalk](https://www.typetalk.in/) |
+| [ElasticSearch](https://github.com/sohlich/elogrus) | Hook for logging to ElasticSearch|
+| [Sumorus](https://github.com/doublefree/sumorus) | Hook for logging to [SumoLogic](https://www.sumologic.com/)|
+| [Logstash](https://github.com/bshuster-repo/logrus-logstash-hook) | Hook for logging to [Logstash](https://www.elastic.co/products/logstash) |
+
+#### Level logging
+
+Logrus has six logging levels: Debug, Info, Warning, Error, Fatal and Panic.
+
+```go
+log.Debug("Useful debugging information.")
+log.Info("Something noteworthy happened!")
+log.Warn("You should probably take a look at this.")
+log.Error("Something failed but I'm not quitting.")
+// Calls os.Exit(1) after logging
+log.Fatal("Bye.")
+// Calls panic() after logging
+log.Panic("I'm bailing.")
+```
+
+You can set the logging level on a `Logger`, then it will only log entries with
+that severity or anything above it:
+
+```go
+// Will log anything that is info or above (warn, error, fatal, panic). Default.
+log.SetLevel(log.InfoLevel)
+```
+
+It may be useful to set `log.Level = logrus.DebugLevel` in a debug or verbose
+environment if your application has that.
+
+#### Entries
+
+Besides the fields added with `WithField` or `WithFields` some fields are
+automatically added to all logging events:
+
+1. `time`. The timestamp when the entry was created.
+2. `msg`. The logging message passed to `{Info,Warn,Error,Fatal,Panic}` after
+   the `AddFields` call. E.g. `Failed to send event.`
+3. `level`. The logging level. E.g. `info`.
+
+#### Environments
+
+Logrus has no notion of environment.
+
+If you wish for hooks and formatters to only be used in specific environments,
+you should handle that yourself. For example, if your application has a global
+variable `Environment`, which is a string representation of the environment you
+could do:
+
+```go
+import (
+  log "github.com/Sirupsen/logrus"
+)
+
+init() {
+  // do something here to set environment depending on an environment variable
+  // or command-line flag
+  if Environment == "production" {
+    log.SetFormatter(&log.JSONFormatter{})
+  } else {
+    // The TextFormatter is default, you don't actually have to do this.
+    log.SetFormatter(&log.TextFormatter{})
+  }
+}
+```
+
+This configuration is how `logrus` was intended to be used, but JSON in
+production is mostly only useful if you do log aggregation with tools like
+Splunk or Logstash.
+
+#### Formatters
+
+The built-in logging formatters are:
+
+* `logrus.TextFormatter`. Logs the event in colors if stdout is a tty, otherwise
+  without colors.
+  * *Note:* to force colored output when there is no TTY, set the `ForceColors`
+    field to `true`.  To force no colored output even if there is a TTY  set the
+    `DisableColors` field to `true`
+* `logrus.JSONFormatter`. Logs fields as JSON.
+* `logrus/formatters/logstash.LogstashFormatter`. Logs fields as [Logstash](http://logstash.net) Events.
+
+    ```go
+      logrus.SetFormatter(&logstash.LogstashFormatter{Type: "application_name"})
+    ```
+
+Third party logging formatters:
+
+* [`prefixed`](https://github.com/x-cray/logrus-prefixed-formatter). Displays log entry source along with alternative layout.
+* [`zalgo`](https://github.com/aybabtme/logzalgo). Invoking the P͉̫o̳̼̊w̖͈̰͎e̬͔̭͂r͚̼̹̲ ̫͓͉̳͈ō̠͕͖̚f̝͍̠ ͕̲̞͖͑Z̖̫̤̫ͪa͉̬͈̗l͖͎g̳̥o̰̥̅!̣͔̲̻͊̄ ̙̘̦̹̦.
+
+You can define your formatter by implementing the `Formatter` interface,
+requiring a `Format` method. `Format` takes an `*Entry`. `entry.Data` is a
+`Fields` type (`map[string]interface{}`) with all your fields as well as the
+default ones (see Entries section above):
+
+```go
+type MyJSONFormatter struct {
+}
+
+log.SetFormatter(new(MyJSONFormatter))
+
+func (f *MyJSONFormatter) Format(entry *Entry) ([]byte, error) {
+  // Note this doesn't include Time, Level and Message which are available on
+  // the Entry. Consult `godoc` on information about those fields or read the
+  // source of the official loggers.
+  serialized, err := json.Marshal(entry.Data)
+    if err != nil {
+      return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
+    }
+  return append(serialized, '\n'), nil
+}
+```
+
+#### Logger as an `io.Writer`
+
+Logrus can be transformed into an `io.Writer`. That writer is the end of an `io.Pipe` and it is your responsibility to close it.
+
+```go
+w := logger.Writer()
+defer w.Close()
+
+srv := http.Server{
+    // create a stdlib log.Logger that writes to
+    // logrus.Logger.
+    ErrorLog: log.New(w, "", 0),
+}
+```
+
+Each line written to that writer will be printed the usual way, using formatters
+and hooks. The level for those entries is `info`.
+
+#### Rotation
+
+Log rotation is not provided with Logrus. Log rotation should be done by an
+external program (like `logrotate(8)`) that can compress and delete old log
+entries. It should not be a feature of the application-level logger.
+
+#### Tools
+
+| Tool | Description |
+| ---- | ----------- |
+|[Logrus Mate](https://github.com/gogap/logrus_mate)|Logrus mate is a tool for Logrus to manage loggers, you can initial logger's level, hook and formatter by config file, the logger will generated with different config at different environment.|
+
+#### Testing
+
+Logrus has a built in facility for asserting the presence of log messages. This is implemented through the `test` hook and provides:
+
+* decorators for existing logger (`test.NewLocal` and `test.NewGlobal`) which basically just add the `test` hook
+* a test logger (`test.NewNullLogger`) that just records log messages (and does not output any):
+
+```go
+logger, hook := NewNullLogger()
+logger.Error("Hello error")
+
+assert.Equal(1, len(hook.Entries))
+assert.Equal(logrus.ErrorLevel, hook.LastEntry().Level)
+assert.Equal("Hello error", hook.LastEntry().Message)
+
+hook.Reset()
+assert.Nil(hook.LastEntry())
+```

Godeps/_workspace/src/github.com/Sirupsen/logrus/doc.go

@@ -0,0 +1,26 @@
+/*
+Package logrus is a structured logger for Go, completely API compatible with the standard library logger.
+
+
+The simplest way to use Logrus is simply the package-level exported logger:
+
+  package main
+
+  import (
+    log "github.com/Sirupsen/logrus"
+  )
+
+  func main() {
+    log.WithFields(log.Fields{
+      "animal": "walrus",
+      "number": 1,
+      "size":   10,
+    }).Info("A walrus appears")
+  }
+
+Output:
+  time="2015-09-07T08:48:33Z" level=info msg="A walrus appears" animal=walrus number=1 size=10
+
+For a full guide visit https://github.com/Sirupsen/logrus
+*/
+package logrus

Godeps/_workspace/src/github.com/Sirupsen/logrus/entry.go

@@ -0,0 +1,264 @@
+package logrus
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"time"
+)
+
+// Defines the key when adding errors using WithError.
+var ErrorKey = "error"
+
+// An entry is the final or intermediate Logrus logging entry. It contains all
+// the fields passed with WithField{,s}. It's finally logged when Debug, Info,
+// Warn, Error, Fatal or Panic is called on it. These objects can be reused and
+// passed around as much as you wish to avoid field duplication.
+type Entry struct {
+	Logger *Logger
+
+	// Contains all the fields set by the user.
+	Data Fields
+
+	// Time at which the log entry was created
+	Time time.Time
+
+	// Level the log entry was logged at: Debug, Info, Warn, Error, Fatal or Panic
+	Level Level
+
+	// Message passed to Debug, Info, Warn, Error, Fatal or Panic
+	Message string
+}
+
+func NewEntry(logger *Logger) *Entry {
+	return &Entry{
+		Logger: logger,
+		// Default is three fields, give a little extra room
+		Data: make(Fields, 5),
+	}
+}
+
+// Returns a reader for the entry, which is a proxy to the formatter.
+func (entry *Entry) Reader() (*bytes.Buffer, error) {
+	serialized, err := entry.Logger.Formatter.Format(entry)
+	return bytes.NewBuffer(serialized), err
+}
+
+// Returns the string representation from the reader and ultimately the
+// formatter.
+func (entry *Entry) String() (string, error) {
+	reader, err := entry.Reader()
+	if err != nil {
+		return "", err
+	}
+
+	return reader.String(), err
+}
+
+// Add an error as single field (using the key defined in ErrorKey) to the Entry.
+func (entry *Entry) WithError(err error) *Entry {
+	return entry.WithField(ErrorKey, err)
+}
+
+// Add a single field to the Entry.
+func (entry *Entry) WithField(key string, value interface{}) *Entry {
+	return entry.WithFields(Fields{key: value})
+}
+
+// Add a map of fields to the Entry.
+func (entry *Entry) WithFields(fields Fields) *Entry {
+	data := make(Fields, len(entry.Data)+len(fields))
+	for k, v := range entry.Data {
+		data[k] = v
+	}
+	for k, v := range fields {
+		data[k] = v
+	}
+	return &Entry{Logger: entry.Logger, Data: data}
+}
+
+// This function is not declared with a pointer value because otherwise
+// race conditions will occur when using multiple goroutines
+func (entry Entry) log(level Level, msg string) {
+	entry.Time = time.Now()
+	entry.Level = level
+	entry.Message = msg
+
+	if err := entry.Logger.Hooks.Fire(level, &entry); err != nil {
+		entry.Logger.mu.Lock()
+		fmt.Fprintf(os.Stderr, "Failed to fire hook: %v\n", err)
+		entry.Logger.mu.Unlock()
+	}
+
+	reader, err := entry.Reader()
+	if err != nil {
+		entry.Logger.mu.Lock()
+		fmt.Fprintf(os.Stderr, "Failed to obtain reader, %v\n", err)
+		entry.Logger.mu.Unlock()
+	}
+
+	entry.Logger.mu.Lock()
+	defer entry.Logger.mu.Unlock()
+
+	_, err = io.Copy(entry.Logger.Out, reader)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to write to log, %v\n", err)
+	}
+
+	// To avoid Entry#log() returning a value that only would make sense for
+	// panic() to use in Entry#Panic(), we avoid the allocation by checking
+	// directly here.
+	if level <= PanicLevel {
+		panic(&entry)
+	}
+}
+
+func (entry *Entry) Debug(args ...interface{}) {
+	if entry.Logger.Level >= DebugLevel {
+		entry.log(DebugLevel, fmt.Sprint(args...))
+	}
+}
+
+func (entry *Entry) Print(args ...interface{}) {
+	entry.Info(args...)
+}
+
+func (entry *Entry) Info(args ...interface{}) {
+	if entry.Logger.Level >= InfoLevel {
+		entry.log(InfoLevel, fmt.Sprint(args...))
+	}
+}
+
+func (entry *Entry) Warn(args ...interface{}) {
+	if entry.Logger.Level >= WarnLevel {
+		entry.log(WarnLevel, fmt.Sprint(args...))
+	}
+}
+
+func (entry *Entry) Warning(args ...interface{}) {
+	entry.Warn(args...)
+}
+
+func (entry *Entry) Error(args ...interface{}) {
+	if entry.Logger.Level >= ErrorLevel {
+		entry.log(ErrorLevel, fmt.Sprint(args...))
+	}
+}
+
+func (entry *Entry) Fatal(args ...interface{}) {
+	if entry.Logger.Level >= FatalLevel {
+		entry.log(FatalLevel, fmt.Sprint(args...))
+	}
+	os.Exit(1)
+}
+
+func (entry *Entry) Panic(args ...interface{}) {
+	if entry.Logger.Level >= PanicLevel {
+		entry.log(PanicLevel, fmt.Sprint(args...))
+	}
+	panic(fmt.Sprint(args...))
+}
+
+// Entry Printf family functions
+
+func (entry *Entry) Debugf(format string, args ...interface{}) {
+	if entry.Logger.Level >= DebugLevel {
+		entry.Debug(fmt.Sprintf(format, args...))
+	}
+}
+
+func (entry *Entry) Infof(format string, args ...interface{}) {
+	if entry.Logger.Level >= InfoLevel {
+		entry.Info(fmt.Sprintf(format, args...))
+	}
+}
+
+func (entry *Entry) Printf(format string, args ...interface{}) {
+	entry.Infof(format, args...)
+}
+
+func (entry *Entry) Warnf(format string, args ...interface{}) {
+	if entry.Logger.Level >= WarnLevel {
+		entry.Warn(fmt.Sprintf(format, args...))
+	}
+}
+
+func (entry *Entry) Warningf(format string, args ...interface{}) {
+	entry.Warnf(format, args...)
+}
+
+func (entry *Entry) Errorf(format string, args ...interface{}) {
+	if entry.Logger.Level >= ErrorLevel {
+		entry.Error(fmt.Sprintf(format, args...))
+	}
+}
+
+func (entry *Entry) Fatalf(format string, args ...interface{}) {
+	if entry.Logger.Level >= FatalLevel {
+		entry.Fatal(fmt.Sprintf(format, args...))
+	}
+	os.Exit(1)
+}
+
+func (entry *Entry) Panicf(format string, args ...interface{}) {
+	if entry.Logger.Level >= PanicLevel {
+		entry.Panic(fmt.Sprintf(format, args...))
+	}
+}
+
+// Entry Println family functions
+
+func (entry *Entry) Debugln(args ...interface{}) {
+	if entry.Logger.Level >= DebugLevel {
+		entry.Debug(entry.sprintlnn(args...))
+	}
+}
+
+func (entry *Entry) Infoln(args ...interface{}) {
+	if entry.Logger.Level >= InfoLevel {
+		entry.Info(entry.sprintlnn(args...))
+	}
+}
+
+func (entry *Entry) Println(args ...interface{}) {
+	entry.Infoln(args...)
+}
+
+func (entry *Entry) Warnln(args ...interface{}) {
+	if entry.Logger.Level >= WarnLevel {
+		entry.Warn(entry.sprintlnn(args...))
+	}
+}
+
+func (entry *Entry) Warningln(args ...interface{}) {
+	entry.Warnln(args...)
+}
+
+func (entry *Entry) Errorln(args ...interface{}) {
+	if entry.Logger.Level >= ErrorLevel {
+		entry.Error(entry.sprintlnn(args...))
+	}
+}
+
+func (entry *Entry) Fatalln(args ...interface{}) {
+	if entry.Logger.Level >= FatalLevel {
+		entry.Fatal(entry.sprintlnn(args...))
+	}
+	os.Exit(1)
+}
+
+func (entry *Entry) Panicln(args ...interface{}) {
+	if entry.Logger.Level >= PanicLevel {
+		entry.Panic(entry.sprintlnn(args...))
+	}
+}
+
+// Sprintlnn => Sprint no newline. This is to get the behavior of how
+// fmt.Sprintln where spaces are always added between operands, regardless of
+// their type. Instead of vendoring the Sprintln implementation to spare a
+// string allocation, we do the simplest thing.
+func (entry *Entry) sprintlnn(args ...interface{}) string {
+	msg := fmt.Sprintln(args...)
+	return msg[:len(msg)-1]
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/entry_test.go

@@ -0,0 +1,77 @@
+package logrus
+
+import (
+	"bytes"
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEntryWithError(t *testing.T) {
+
+	assert := assert.New(t)
+
+	defer func() {
+		ErrorKey = "error"
+	}()
+
+	err := fmt.Errorf("kaboom at layer %d", 4711)
+
+	assert.Equal(err, WithError(err).Data["error"])
+
+	logger := New()
+	logger.Out = &bytes.Buffer{}
+	entry := NewEntry(logger)
+
+	assert.Equal(err, entry.WithError(err).Data["error"])
+
+	ErrorKey = "err"
+
+	assert.Equal(err, entry.WithError(err).Data["err"])
+
+}
+
+func TestEntryPanicln(t *testing.T) {
+	errBoom := fmt.Errorf("boom time")
+
+	defer func() {
+		p := recover()
+		assert.NotNil(t, p)
+
+		switch pVal := p.(type) {
+		case *Entry:
+			assert.Equal(t, "kaboom", pVal.Message)
+			assert.Equal(t, errBoom, pVal.Data["err"])
+		default:
+			t.Fatalf("want type *Entry, got %T: %#v", pVal, pVal)
+		}
+	}()
+
+	logger := New()
+	logger.Out = &bytes.Buffer{}
+	entry := NewEntry(logger)
+	entry.WithField("err", errBoom).Panicln("kaboom")
+}
+
+func TestEntryPanicf(t *testing.T) {
+	errBoom := fmt.Errorf("boom again")
+
+	defer func() {
+		p := recover()
+		assert.NotNil(t, p)
+
+		switch pVal := p.(type) {
+		case *Entry:
+			assert.Equal(t, "kaboom true", pVal.Message)
+			assert.Equal(t, errBoom, pVal.Data["err"])
+		default:
+			t.Fatalf("want type *Entry, got %T: %#v", pVal, pVal)
+		}
+	}()
+
+	logger := New()
+	logger.Out = &bytes.Buffer{}
+	entry := NewEntry(logger)
+	entry.WithField("err", errBoom).Panicf("kaboom %v", true)
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/examples/basic/basic.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"github.com/Sirupsen/logrus"
+)
+
+var log = logrus.New()
+
+func init() {
+	log.Formatter = new(logrus.JSONFormatter)
+	log.Formatter = new(logrus.TextFormatter) // default
+	log.Level = logrus.DebugLevel
+}
+
+func main() {
+	defer func() {
+		err := recover()
+		if err != nil {
+			log.WithFields(logrus.Fields{
+				"omg":    true,
+				"err":    err,
+				"number": 100,
+			}).Fatal("The ice breaks!")
+		}
+	}()
+
+	log.WithFields(logrus.Fields{
+		"animal": "walrus",
+		"number": 8,
+	}).Debug("Started observing beach")
+
+	log.WithFields(logrus.Fields{
+		"animal": "walrus",
+		"size":   10,
+	}).Info("A group of walrus emerges from the ocean")
+
+	log.WithFields(logrus.Fields{
+		"omg":    true,
+		"number": 122,
+	}).Warn("The group's number increased tremendously!")
+
+	log.WithFields(logrus.Fields{
+		"temperature": -4,
+	}).Debug("Temperature changes")
+
+	log.WithFields(logrus.Fields{
+		"animal": "orca",
+		"size":   9009,
+	}).Panic("It's over 9000!")
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/examples/hook/hook.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"github.com/Sirupsen/logrus"
+	"gopkg.in/gemnasium/logrus-airbrake-hook.v2"
+)
+
+var log = logrus.New()
+
+func init() {
+	log.Formatter = new(logrus.TextFormatter) // default
+	log.Hooks.Add(airbrake.NewHook(123, "xyz", "development"))
+}
+
+func main() {
+	log.WithFields(logrus.Fields{
+		"animal": "walrus",
+		"size":   10,
+	}).Info("A group of walrus emerges from the ocean")
+
+	log.WithFields(logrus.Fields{
+		"omg":    true,
+		"number": 122,
+	}).Warn("The group's number increased tremendously!")
+
+	log.WithFields(logrus.Fields{
+		"omg":    true,
+		"number": 100,
+	}).Fatal("The ice breaks!")
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/exported.go

@@ -0,0 +1,193 @@
+package logrus
+
+import (
+	"io"
+)
+
+var (
+	// std is the name of the standard logger in stdlib `log`
+	std = New()
+)
+
+func StandardLogger() *Logger {
+	return std
+}
+
+// SetOutput sets the standard logger output.
+func SetOutput(out io.Writer) {
+	std.mu.Lock()
+	defer std.mu.Unlock()
+	std.Out = out
+}
+
+// SetFormatter sets the standard logger formatter.
+func SetFormatter(formatter Formatter) {
+	std.mu.Lock()
+	defer std.mu.Unlock()
+	std.Formatter = formatter
+}
+
+// SetLevel sets the standard logger level.
+func SetLevel(level Level) {
+	std.mu.Lock()
+	defer std.mu.Unlock()
+	std.Level = level
+}
+
+// GetLevel returns the standard logger level.
+func GetLevel() Level {
+	std.mu.Lock()
+	defer std.mu.Unlock()
+	return std.Level
+}
+
+// AddHook adds a hook to the standard logger hooks.
+func AddHook(hook Hook) {
+	std.mu.Lock()
+	defer std.mu.Unlock()
+	std.Hooks.Add(hook)
+}
+
+// WithError creates an entry from the standard logger and adds an error to it, using the value defined in ErrorKey as key.
+func WithError(err error) *Entry {
+	return std.WithField(ErrorKey, err)
+}
+
+// WithField creates an entry from the standard logger and adds a field to
+// it. If you want multiple fields, use `WithFields`.
+//
+// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
+// or Panic on the Entry it returns.
+func WithField(key string, value interface{}) *Entry {
+	return std.WithField(key, value)
+}
+
+// WithFields creates an entry from the standard logger and adds multiple
+// fields to it. This is simply a helper for `WithField`, invoking it
+// once for each field.
+//
+// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
+// or Panic on the Entry it returns.
+func WithFields(fields Fields) *Entry {
+	return std.WithFields(fields)
+}
+
+// Debug logs a message at level Debug on the standard logger.
+func Debug(args ...interface{}) {
+	std.Debug(args...)
+}
+
+// Print logs a message at level Info on the standard logger.
+func Print(args ...interface{}) {
+	std.Print(args...)
+}
+
+// Info logs a message at level Info on the standard logger.
+func Info(args ...interface{}) {
+	std.Info(args...)
+}
+
+// Warn logs a message at level Warn on the standard logger.
+func Warn(args ...interface{}) {
+	std.Warn(args...)
+}
+
+// Warning logs a message at level Warn on the standard logger.
+func Warning(args ...interface{}) {
+	std.Warning(args...)
+}
+
+// Error logs a message at level Error on the standard logger.
+func Error(args ...interface{}) {
+	std.Error(args...)
+}
+
+// Panic logs a message at level Panic on the standard logger.
+func Panic(args ...interface{}) {
+	std.Panic(args...)
+}
+
+// Fatal logs a message at level Fatal on the standard logger.
+func Fatal(args ...interface{}) {
+	std.Fatal(args...)
+}
+
+// Debugf logs a message at level Debug on the standard logger.
+func Debugf(format string, args ...interface{}) {
+	std.Debugf(format, args...)
+}
+
+// Printf logs a message at level Info on the standard logger.
+func Printf(format string, args ...interface{}) {
+	std.Printf(format, args...)
+}
+
+// Infof logs a message at level Info on the standard logger.
+func Infof(format string, args ...interface{}) {
+	std.Infof(format, args...)
+}
+
+// Warnf logs a message at level Warn on the standard logger.
+func Warnf(format string, args ...interface{}) {
+	std.Warnf(format, args...)
+}
+
+// Warningf logs a message at level Warn on the standard logger.
+func Warningf(format string, args ...interface{}) {
+	std.Warningf(format, args...)
+}
+
+// Errorf logs a message at level Error on the standard logger.
+func Errorf(format string, args ...interface{}) {
+	std.Errorf(format, args...)
+}
+
+// Panicf logs a message at level Panic on the standard logger.
+func Panicf(format string, args ...interface{}) {
+	std.Panicf(format, args...)
+}
+
+// Fatalf logs a message at level Fatal on the standard logger.
+func Fatalf(format string, args ...interface{}) {
+	std.Fatalf(format, args...)
+}
+
+// Debugln logs a message at level Debug on the standard logger.
+func Debugln(args ...interface{}) {
+	std.Debugln(args...)
+}
+
+// Println logs a message at level Info on the standard logger.
+func Println(args ...interface{}) {
+	std.Println(args...)
+}
+
+// Infoln logs a message at level Info on the standard logger.
+func Infoln(args ...interface{}) {
+	std.Infoln(args...)
+}
+
+// Warnln logs a message at level Warn on the standard logger.
+func Warnln(args ...interface{}) {
+	std.Warnln(args...)
+}
+
+// Warningln logs a message at level Warn on the standard logger.
+func Warningln(args ...interface{}) {
+	std.Warningln(args...)
+}
+
+// Errorln logs a message at level Error on the standard logger.
+func Errorln(args ...interface{}) {
+	std.Errorln(args...)
+}
+
+// Panicln logs a message at level Panic on the standard logger.
+func Panicln(args ...interface{}) {
+	std.Panicln(args...)
+}
+
+// Fatalln logs a message at level Fatal on the standard logger.
+func Fatalln(args ...interface{}) {
+	std.Fatalln(args...)
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/formatter.go

@@ -0,0 +1,45 @@
+package logrus
+
+import "time"
+
+const DefaultTimestampFormat = time.RFC3339
+
+// The Formatter interface is used to implement a custom Formatter. It takes an
+// `Entry`. It exposes all the fields, including the default ones:
+//
+// * `entry.Data["msg"]`. The message passed from Info, Warn, Error ..
+// * `entry.Data["time"]`. The timestamp.
+// * `entry.Data["level"]. The level the entry was logged at.
+//
+// Any additional fields added with `WithField` or `WithFields` are also in
+// `entry.Data`. Format is expected to return an array of bytes which are then
+// logged to `logger.Out`.
+type Formatter interface {
+	Format(*Entry) ([]byte, error)
+}
+
+// This is to not silently overwrite `time`, `msg` and `level` fields when
+// dumping it. If this code wasn't there doing:
+//
+//  logrus.WithField("level", 1).Info("hello")
+//
+// Would just silently drop the user provided level. Instead with this code
+// it'll logged as:
+//
+//  {"level": "info", "fields.level": 1, "msg": "hello", "time": "..."}
+//
+// It's not exported because it's still using Data in an opinionated way. It's to
+// avoid code duplication between the two default formatters.
+func prefixFieldClashes(data Fields) {
+	if t, ok := data["time"]; ok {
+		data["fields.time"] = t
+	}
+
+	if m, ok := data["msg"]; ok {
+		data["fields.msg"] = m
+	}
+
+	if l, ok := data["level"]; ok {
+		data["fields.level"] = l
+	}
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/formatter_bench_test.go

@@ -0,0 +1,98 @@
+package logrus
+
+import (
+	"fmt"
+	"testing"
+	"time"
+)
+
+// smallFields is a small size data set for benchmarking
+var smallFields = Fields{
+	"foo":   "bar",
+	"baz":   "qux",
+	"one":   "two",
+	"three": "four",
+}
+
+// largeFields is a large size data set for benchmarking
+var largeFields = Fields{
+	"foo":       "bar",
+	"baz":       "qux",
+	"one":       "two",
+	"three":     "four",
+	"five":      "six",
+	"seven":     "eight",
+	"nine":      "ten",
+	"eleven":    "twelve",
+	"thirteen":  "fourteen",
+	"fifteen":   "sixteen",
+	"seventeen": "eighteen",
+	"nineteen":  "twenty",
+	"a":         "b",
+	"c":         "d",
+	"e":         "f",
+	"g":         "h",
+	"i":         "j",
+	"k":         "l",
+	"m":         "n",
+	"o":         "p",
+	"q":         "r",
+	"s":         "t",
+	"u":         "v",
+	"w":         "x",
+	"y":         "z",
+	"this":      "will",
+	"make":      "thirty",
+	"entries":   "yeah",
+}
+
+var errorFields = Fields{
+	"foo": fmt.Errorf("bar"),
+	"baz": fmt.Errorf("qux"),
+}
+
+func BenchmarkErrorTextFormatter(b *testing.B) {
+	doBenchmark(b, &TextFormatter{DisableColors: true}, errorFields)
+}
+
+func BenchmarkSmallTextFormatter(b *testing.B) {
+	doBenchmark(b, &TextFormatter{DisableColors: true}, smallFields)
+}
+
+func BenchmarkLargeTextFormatter(b *testing.B) {
+	doBenchmark(b, &TextFormatter{DisableColors: true}, largeFields)
+}
+
+func BenchmarkSmallColoredTextFormatter(b *testing.B) {
+	doBenchmark(b, &TextFormatter{ForceColors: true}, smallFields)
+}
+
+func BenchmarkLargeColoredTextFormatter(b *testing.B) {
+	doBenchmark(b, &TextFormatter{ForceColors: true}, largeFields)
+}
+
+func BenchmarkSmallJSONFormatter(b *testing.B) {
+	doBenchmark(b, &JSONFormatter{}, smallFields)
+}
+
+func BenchmarkLargeJSONFormatter(b *testing.B) {
+	doBenchmark(b, &JSONFormatter{}, largeFields)
+}
+
+func doBenchmark(b *testing.B, formatter Formatter, fields Fields) {
+	entry := &Entry{
+		Time:    time.Time{},
+		Level:   InfoLevel,
+		Message: "message",
+		Data:    fields,
+	}
+	var d []byte
+	var err error
+	for i := 0; i < b.N; i++ {
+		d, err = formatter.Format(entry)
+		if err != nil {
+			b.Fatal(err)
+		}
+		b.SetBytes(int64(len(d)))
+	}
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/formatters/logstash/logstash.go

@@ -0,0 +1,63 @@
+package logstash
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/Sirupsen/logrus"
+)
+
+// Formatter generates json in logstash format.
+// Logstash site: http://logstash.net/
+type LogstashFormatter struct {
+	Type string // if not empty use for logstash type field.
+
+	// TimestampFormat sets the format used for timestamps.
+	TimestampFormat string
+}
+
+func (f *LogstashFormatter) Format(entry *logrus.Entry) ([]byte, error) {
+	fields := make(logrus.Fields)
+	for k, v := range entry.Data {
+		fields[k] = v
+	}
+
+	fields["@version"] = 1
+
+	timeStampFormat := f.TimestampFormat
+
+	if timeStampFormat == "" {
+		timeStampFormat = logrus.DefaultTimestampFormat
+	}
+
+	fields["@timestamp"] = entry.Time.Format(timeStampFormat)
+
+	// set message field
+	v, ok := entry.Data["message"]
+	if ok {
+		fields["fields.message"] = v
+	}
+	fields["message"] = entry.Message
+
+	// set level field
+	v, ok = entry.Data["level"]
+	if ok {
+		fields["fields.level"] = v
+	}
+	fields["level"] = entry.Level.String()
+
+	// set type field
+	if f.Type != "" {
+		v, ok = entry.Data["type"]
+		if ok {
+			fields["fields.type"] = v
+		}
+		fields["type"] = f.Type
+	}
+
+	serialized, err := json.Marshal(fields)
+	if err != nil {
+		return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
+	}
+	return append(serialized, '\n'), nil
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/formatters/logstash/logstash_test.go

@@ -0,0 +1,52 @@
+package logstash
+
+import (
+	"bytes"
+	"encoding/json"
+	"github.com/Sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestLogstashFormatter(t *testing.T) {
+	assert := assert.New(t)
+
+	lf := LogstashFormatter{Type: "abc"}
+
+	fields := logrus.Fields{
+		"message": "def",
+		"level":   "ijk",
+		"type":    "lmn",
+		"one":     1,
+		"pi":      3.14,
+		"bool":    true,
+	}
+
+	entry := logrus.WithFields(fields)
+	entry.Message = "msg"
+	entry.Level = logrus.InfoLevel
+
+	b, _ := lf.Format(entry)
+
+	var data map[string]interface{}
+	dec := json.NewDecoder(bytes.NewReader(b))
+	dec.UseNumber()
+	dec.Decode(&data)
+
+	// base fields
+	assert.Equal(json.Number("1"), data["@version"])
+	assert.NotEmpty(data["@timestamp"])
+	assert.Equal("abc", data["type"])
+	assert.Equal("msg", data["message"])
+	assert.Equal("info", data["level"])
+
+	// substituted fields
+	assert.Equal("def", data["fields.message"])
+	assert.Equal("ijk", data["fields.level"])
+	assert.Equal("lmn", data["fields.type"])
+
+	// formats
+	assert.Equal(json.Number("1"), data["one"])
+	assert.Equal(json.Number("3.14"), data["pi"])
+	assert.Equal(true, data["bool"])
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/hook_test.go

@@ -0,0 +1,122 @@
+package logrus
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type TestHook struct {
+	Fired bool
+}
+
+func (hook *TestHook) Fire(entry *Entry) error {
+	hook.Fired = true
+	return nil
+}
+
+func (hook *TestHook) Levels() []Level {
+	return []Level{
+		DebugLevel,
+		InfoLevel,
+		WarnLevel,
+		ErrorLevel,
+		FatalLevel,
+		PanicLevel,
+	}
+}
+
+func TestHookFires(t *testing.T) {
+	hook := new(TestHook)
+
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Hooks.Add(hook)
+		assert.Equal(t, hook.Fired, false)
+
+		log.Print("test")
+	}, func(fields Fields) {
+		assert.Equal(t, hook.Fired, true)
+	})
+}
+
+type ModifyHook struct {
+}
+
+func (hook *ModifyHook) Fire(entry *Entry) error {
+	entry.Data["wow"] = "whale"
+	return nil
+}
+
+func (hook *ModifyHook) Levels() []Level {
+	return []Level{
+		DebugLevel,
+		InfoLevel,
+		WarnLevel,
+		ErrorLevel,
+		FatalLevel,
+		PanicLevel,
+	}
+}
+
+func TestHookCanModifyEntry(t *testing.T) {
+	hook := new(ModifyHook)
+
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Hooks.Add(hook)
+		log.WithField("wow", "elephant").Print("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["wow"], "whale")
+	})
+}
+
+func TestCanFireMultipleHooks(t *testing.T) {
+	hook1 := new(ModifyHook)
+	hook2 := new(TestHook)
+
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Hooks.Add(hook1)
+		log.Hooks.Add(hook2)
+
+		log.WithField("wow", "elephant").Print("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["wow"], "whale")
+		assert.Equal(t, hook2.Fired, true)
+	})
+}
+
+type ErrorHook struct {
+	Fired bool
+}
+
+func (hook *ErrorHook) Fire(entry *Entry) error {
+	hook.Fired = true
+	return nil
+}
+
+func (hook *ErrorHook) Levels() []Level {
+	return []Level{
+		ErrorLevel,
+	}
+}
+
+func TestErrorHookShouldntFireOnInfo(t *testing.T) {
+	hook := new(ErrorHook)
+
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Hooks.Add(hook)
+		log.Info("test")
+	}, func(fields Fields) {
+		assert.Equal(t, hook.Fired, false)
+	})
+}
+
+func TestErrorHookShouldFireOnError(t *testing.T) {
+	hook := new(ErrorHook)
+
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Hooks.Add(hook)
+		log.Error("test")
+	}, func(fields Fields) {
+		assert.Equal(t, hook.Fired, true)
+	})
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/hooks.go

@@ -0,0 +1,34 @@
+package logrus
+
+// A hook to be fired when logging on the logging levels returned from
+// `Levels()` on your implementation of the interface. Note that this is not
+// fired in a goroutine or a channel with workers, you should handle such
+// functionality yourself if your call is non-blocking and you don't wish for
+// the logging calls for levels returned from `Levels()` to block.
+type Hook interface {
+	Levels() []Level
+	Fire(*Entry) error
+}
+
+// Internal type for storing the hooks on a logger instance.
+type LevelHooks map[Level][]Hook
+
+// Add a hook to an instance of logger. This is called with
+// `log.Hooks.Add(new(MyHook))` where `MyHook` implements the `Hook` interface.
+func (hooks LevelHooks) Add(hook Hook) {
+	for _, level := range hook.Levels() {
+		hooks[level] = append(hooks[level], hook)
+	}
+}
+
+// Fire all the hooks for the passed level. Used by `entry.log` to fire
+// appropriate hooks for a log entry.
+func (hooks LevelHooks) Fire(level Level, entry *Entry) error {
+	for _, hook := range hooks[level] {
+		if err := hook.Fire(entry); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/hooks/syslog/README.md

@@ -0,0 +1,39 @@
+# Syslog Hooks for Logrus <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:"/>
+
+## Usage
+
+```go
+import (
+  "log/syslog"
+  "github.com/Sirupsen/logrus"
+  logrus_syslog "github.com/Sirupsen/logrus/hooks/syslog"
+)
+
+func main() {
+  log       := logrus.New()
+  hook, err := logrus_syslog.NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
+
+  if err == nil {
+    log.Hooks.Add(hook)
+  }
+}
+```
+
+If you want to connect to local syslog (Ex. "/dev/log" or "/var/run/syslog" or "/var/run/log"). Just assign empty string to the first two parameters of `NewSyslogHook`. It should look like the following.
+
+```go
+import (
+  "log/syslog"
+  "github.com/Sirupsen/logrus"
+  logrus_syslog "github.com/Sirupsen/logrus/hooks/syslog"
+)
+
+func main() {
+  log       := logrus.New()
+  hook, err := logrus_syslog.NewSyslogHook("", "", syslog.LOG_INFO, "")
+
+  if err == nil {
+    log.Hooks.Add(hook)
+  }
+}
+```

Godeps/_workspace/src/github.com/Sirupsen/logrus/hooks/syslog/syslog.go

@@ -0,0 +1,54 @@
+// +build !windows,!nacl,!plan9
+
+package logrus_syslog
+
+import (
+	"fmt"
+	"github.com/Sirupsen/logrus"
+	"log/syslog"
+	"os"
+)
+
+// SyslogHook to send logs via syslog.
+type SyslogHook struct {
+	Writer        *syslog.Writer
+	SyslogNetwork string
+	SyslogRaddr   string
+}
+
+// Creates a hook to be added to an instance of logger. This is called with
+// `hook, err := NewSyslogHook("udp", "localhost:514", syslog.LOG_DEBUG, "")`
+// `if err == nil { log.Hooks.Add(hook) }`
+func NewSyslogHook(network, raddr string, priority syslog.Priority, tag string) (*SyslogHook, error) {
+	w, err := syslog.Dial(network, raddr, priority, tag)
+	return &SyslogHook{w, network, raddr}, err
+}
+
+func (hook *SyslogHook) Fire(entry *logrus.Entry) error {
+	line, err := entry.String()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to read entry, %v", err)
+		return err
+	}
+
+	switch entry.Level {
+	case logrus.PanicLevel:
+		return hook.Writer.Crit(line)
+	case logrus.FatalLevel:
+		return hook.Writer.Crit(line)
+	case logrus.ErrorLevel:
+		return hook.Writer.Err(line)
+	case logrus.WarnLevel:
+		return hook.Writer.Warning(line)
+	case logrus.InfoLevel:
+		return hook.Writer.Info(line)
+	case logrus.DebugLevel:
+		return hook.Writer.Debug(line)
+	default:
+		return nil
+	}
+}
+
+func (hook *SyslogHook) Levels() []logrus.Level {
+	return logrus.AllLevels
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/hooks/syslog/syslog_test.go

@@ -0,0 +1,26 @@
+package logrus_syslog
+
+import (
+	"github.com/Sirupsen/logrus"
+	"log/syslog"
+	"testing"
+)
+
+func TestLocalhostAddAndPrint(t *testing.T) {
+	log := logrus.New()
+	hook, err := NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
+
+	if err != nil {
+		t.Errorf("Unable to connect to local syslog.")
+	}
+
+	log.Hooks.Add(hook)
+
+	for _, level := range hook.Levels() {
+		if len(log.Hooks[level]) != 1 {
+			t.Errorf("SyslogHook was not added. The length of log.Hooks[%v]: %v", level, len(log.Hooks[level]))
+		}
+	}
+
+	log.Info("Congratulations!")
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/hooks/test/test.go

@@ -0,0 +1,67 @@
+package test
+
+import (
+	"io/ioutil"
+
+	"github.com/Sirupsen/logrus"
+)
+
+// test.Hook is a hook designed for dealing with logs in test scenarios.
+type Hook struct {
+	Entries []*logrus.Entry
+}
+
+// Installs a test hook for the global logger.
+func NewGlobal() *Hook {
+
+	hook := new(Hook)
+	logrus.AddHook(hook)
+
+	return hook
+
+}
+
+// Installs a test hook for a given local logger.
+func NewLocal(logger *logrus.Logger) *Hook {
+
+	hook := new(Hook)
+	logger.Hooks.Add(hook)
+
+	return hook
+
+}
+
+// Creates a discarding logger and installs the test hook.
+func NewNullLogger() (*logrus.Logger, *Hook) {
+
+	logger := logrus.New()
+	logger.Out = ioutil.Discard
+
+	return logger, NewLocal(logger)
+
+}
+
+func (t *Hook) Fire(e *logrus.Entry) error {
+	t.Entries = append(t.Entries, e)
+	return nil
+}
+
+func (t *Hook) Levels() []logrus.Level {
+	return logrus.AllLevels
+}
+
+// LastEntry returns the last entry that was logged or nil.
+func (t *Hook) LastEntry() (l *logrus.Entry) {
+
+	if i := len(t.Entries) - 1; i < 0 {
+		return nil
+	} else {
+		return t.Entries[i]
+	}
+
+}
+
+// Reset removes all Entries from this test hook.
+func (t *Hook) Reset() {
+	t.Entries = make([]*logrus.Entry, 0)
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/hooks/test/test_test.go

@@ -0,0 +1,39 @@
+package test
+
+import (
+	"testing"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAllHooks(t *testing.T) {
+
+	assert := assert.New(t)
+
+	logger, hook := NewNullLogger()
+	assert.Nil(hook.LastEntry())
+	assert.Equal(0, len(hook.Entries))
+
+	logger.Error("Hello error")
+	assert.Equal(logrus.ErrorLevel, hook.LastEntry().Level)
+	assert.Equal("Hello error", hook.LastEntry().Message)
+	assert.Equal(1, len(hook.Entries))
+
+	logger.Warn("Hello warning")
+	assert.Equal(logrus.WarnLevel, hook.LastEntry().Level)
+	assert.Equal("Hello warning", hook.LastEntry().Message)
+	assert.Equal(2, len(hook.Entries))
+
+	hook.Reset()
+	assert.Nil(hook.LastEntry())
+	assert.Equal(0, len(hook.Entries))
+
+	hook = NewGlobal()
+
+	logrus.Error("Hello error")
+	assert.Equal(logrus.ErrorLevel, hook.LastEntry().Level)
+	assert.Equal("Hello error", hook.LastEntry().Message)
+	assert.Equal(1, len(hook.Entries))
+
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/json_formatter.go

@@ -0,0 +1,41 @@
+package logrus
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type JSONFormatter struct {
+	// TimestampFormat sets the format used for marshaling timestamps.
+	TimestampFormat string
+}
+
+func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
+	data := make(Fields, len(entry.Data)+3)
+	for k, v := range entry.Data {
+		switch v := v.(type) {
+		case error:
+			// Otherwise errors are ignored by `encoding/json`
+			// https://github.com/Sirupsen/logrus/issues/137
+			data[k] = v.Error()
+		default:
+			data[k] = v
+		}
+	}
+	prefixFieldClashes(data)
+
+	timestampFormat := f.TimestampFormat
+	if timestampFormat == "" {
+		timestampFormat = DefaultTimestampFormat
+	}
+
+	data["time"] = entry.Time.Format(timestampFormat)
+	data["msg"] = entry.Message
+	data["level"] = entry.Level.String()
+
+	serialized, err := json.Marshal(data)
+	if err != nil {
+		return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
+	}
+	return append(serialized, '\n'), nil
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/json_formatter_test.go

@@ -0,0 +1,120 @@
+package logrus
+
+import (
+	"encoding/json"
+	"errors"
+
+	"testing"
+)
+
+func TestErrorNotLost(t *testing.T) {
+	formatter := &JSONFormatter{}
+
+	b, err := formatter.Format(WithField("error", errors.New("wild walrus")))
+	if err != nil {
+		t.Fatal("Unable to format entry: ", err)
+	}
+
+	entry := make(map[string]interface{})
+	err = json.Unmarshal(b, &entry)
+	if err != nil {
+		t.Fatal("Unable to unmarshal formatted entry: ", err)
+	}
+
+	if entry["error"] != "wild walrus" {
+		t.Fatal("Error field not set")
+	}
+}
+
+func TestErrorNotLostOnFieldNotNamedError(t *testing.T) {
+	formatter := &JSONFormatter{}
+
+	b, err := formatter.Format(WithField("omg", errors.New("wild walrus")))
+	if err != nil {
+		t.Fatal("Unable to format entry: ", err)
+	}
+
+	entry := make(map[string]interface{})
+	err = json.Unmarshal(b, &entry)
+	if err != nil {
+		t.Fatal("Unable to unmarshal formatted entry: ", err)
+	}
+
+	if entry["omg"] != "wild walrus" {
+		t.Fatal("Error field not set")
+	}
+}
+
+func TestFieldClashWithTime(t *testing.T) {
+	formatter := &JSONFormatter{}
+
+	b, err := formatter.Format(WithField("time", "right now!"))
+	if err != nil {
+		t.Fatal("Unable to format entry: ", err)
+	}
+
+	entry := make(map[string]interface{})
+	err = json.Unmarshal(b, &entry)
+	if err != nil {
+		t.Fatal("Unable to unmarshal formatted entry: ", err)
+	}
+
+	if entry["fields.time"] != "right now!" {
+		t.Fatal("fields.time not set to original time field")
+	}
+
+	if entry["time"] != "0001-01-01T00:00:00Z" {
+		t.Fatal("time field not set to current time, was: ", entry["time"])
+	}
+}
+
+func TestFieldClashWithMsg(t *testing.T) {
+	formatter := &JSONFormatter{}
+
+	b, err := formatter.Format(WithField("msg", "something"))
+	if err != nil {
+		t.Fatal("Unable to format entry: ", err)
+	}
+
+	entry := make(map[string]interface{})
+	err = json.Unmarshal(b, &entry)
+	if err != nil {
+		t.Fatal("Unable to unmarshal formatted entry: ", err)
+	}
+
+	if entry["fields.msg"] != "something" {
+		t.Fatal("fields.msg not set to original msg field")
+	}
+}
+
+func TestFieldClashWithLevel(t *testing.T) {
+	formatter := &JSONFormatter{}
+
+	b, err := formatter.Format(WithField("level", "something"))
+	if err != nil {
+		t.Fatal("Unable to format entry: ", err)
+	}
+
+	entry := make(map[string]interface{})
+	err = json.Unmarshal(b, &entry)
+	if err != nil {
+		t.Fatal("Unable to unmarshal formatted entry: ", err)
+	}
+
+	if entry["fields.level"] != "something" {
+		t.Fatal("fields.level not set to original level field")
+	}
+}
+
+func TestJSONEntryEndsWithNewline(t *testing.T) {
+	formatter := &JSONFormatter{}
+
+	b, err := formatter.Format(WithField("level", "something"))
+	if err != nil {
+		t.Fatal("Unable to format entry: ", err)
+	}
+
+	if b[len(b)-1] != '\n' {
+		t.Fatal("Expected JSON log entry to end with a newline")
+	}
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/logger.go

@@ -0,0 +1,212 @@
+package logrus
+
+import (
+	"io"
+	"os"
+	"sync"
+)
+
+type Logger struct {
+	// The logs are `io.Copy`'d to this in a mutex. It's common to set this to a
+	// file, or leave it default which is `os.Stderr`. You can also set this to
+	// something more adventorous, such as logging to Kafka.
+	Out io.Writer
+	// Hooks for the logger instance. These allow firing events based on logging
+	// levels and log entries. For example, to send errors to an error tracking
+	// service, log to StatsD or dump the core on fatal errors.
+	Hooks LevelHooks
+	// All log entries pass through the formatter before logged to Out. The
+	// included formatters are `TextFormatter` and `JSONFormatter` for which
+	// TextFormatter is the default. In development (when a TTY is attached) it
+	// logs with colors, but to a file it wouldn't. You can easily implement your
+	// own that implements the `Formatter` interface, see the `README` or included
+	// formatters for examples.
+	Formatter Formatter
+	// The logging level the logger should log at. This is typically (and defaults
+	// to) `logrus.Info`, which allows Info(), Warn(), Error() and Fatal() to be
+	// logged. `logrus.Debug` is useful in
+	Level Level
+	// Used to sync writing to the log.
+	mu sync.Mutex
+}
+
+// Creates a new logger. Configuration should be set by changing `Formatter`,
+// `Out` and `Hooks` directly on the default logger instance. You can also just
+// instantiate your own:
+//
+//    var log = &Logger{
+//      Out: os.Stderr,
+//      Formatter: new(JSONFormatter),
+//      Hooks: make(LevelHooks),
+//      Level: logrus.DebugLevel,
+//    }
+//
+// It's recommended to make this a global instance called `log`.
+func New() *Logger {
+	return &Logger{
+		Out:       os.Stderr,
+		Formatter: new(TextFormatter),
+		Hooks:     make(LevelHooks),
+		Level:     InfoLevel,
+	}
+}
+
+// Adds a field to the log entry, note that you it doesn't log until you call
+// Debug, Print, Info, Warn, Fatal or Panic. It only creates a log entry.
+// If you want multiple fields, use `WithFields`.
+func (logger *Logger) WithField(key string, value interface{}) *Entry {
+	return NewEntry(logger).WithField(key, value)
+}
+
+// Adds a struct of fields to the log entry. All it does is call `WithField` for
+// each `Field`.
+func (logger *Logger) WithFields(fields Fields) *Entry {
+	return NewEntry(logger).WithFields(fields)
+}
+
+// Add an error as single field to the log entry.  All it does is call
+// `WithError` for the given `error`.
+func (logger *Logger) WithError(err error) *Entry {
+	return NewEntry(logger).WithError(err)
+}
+
+func (logger *Logger) Debugf(format string, args ...interface{}) {
+	if logger.Level >= DebugLevel {
+		NewEntry(logger).Debugf(format, args...)
+	}
+}
+
+func (logger *Logger) Infof(format string, args ...interface{}) {
+	if logger.Level >= InfoLevel {
+		NewEntry(logger).Infof(format, args...)
+	}
+}
+
+func (logger *Logger) Printf(format string, args ...interface{}) {
+	NewEntry(logger).Printf(format, args...)
+}
+
+func (logger *Logger) Warnf(format string, args ...interface{}) {
+	if logger.Level >= WarnLevel {
+		NewEntry(logger).Warnf(format, args...)
+	}
+}
+
+func (logger *Logger) Warningf(format string, args ...interface{}) {
+	if logger.Level >= WarnLevel {
+		NewEntry(logger).Warnf(format, args...)
+	}
+}
+
+func (logger *Logger) Errorf(format string, args ...interface{}) {
+	if logger.Level >= ErrorLevel {
+		NewEntry(logger).Errorf(format, args...)
+	}
+}
+
+func (logger *Logger) Fatalf(format string, args ...interface{}) {
+	if logger.Level >= FatalLevel {
+		NewEntry(logger).Fatalf(format, args...)
+	}
+	os.Exit(1)
+}
+
+func (logger *Logger) Panicf(format string, args ...interface{}) {
+	if logger.Level >= PanicLevel {
+		NewEntry(logger).Panicf(format, args...)
+	}
+}
+
+func (logger *Logger) Debug(args ...interface{}) {
+	if logger.Level >= DebugLevel {
+		NewEntry(logger).Debug(args...)
+	}
+}
+
+func (logger *Logger) Info(args ...interface{}) {
+	if logger.Level >= InfoLevel {
+		NewEntry(logger).Info(args...)
+	}
+}
+
+func (logger *Logger) Print(args ...interface{}) {
+	NewEntry(logger).Info(args...)
+}
+
+func (logger *Logger) Warn(args ...interface{}) {
+	if logger.Level >= WarnLevel {
+		NewEntry(logger).Warn(args...)
+	}
+}
+
+func (logger *Logger) Warning(args ...interface{}) {
+	if logger.Level >= WarnLevel {
+		NewEntry(logger).Warn(args...)
+	}
+}
+
+func (logger *Logger) Error(args ...interface{}) {
+	if logger.Level >= ErrorLevel {
+		NewEntry(logger).Error(args...)
+	}
+}
+
+func (logger *Logger) Fatal(args ...interface{}) {
+	if logger.Level >= FatalLevel {
+		NewEntry(logger).Fatal(args...)
+	}
+	os.Exit(1)
+}
+
+func (logger *Logger) Panic(args ...interface{}) {
+	if logger.Level >= PanicLevel {
+		NewEntry(logger).Panic(args...)
+	}
+}
+
+func (logger *Logger) Debugln(args ...interface{}) {
+	if logger.Level >= DebugLevel {
+		NewEntry(logger).Debugln(args...)
+	}
+}
+
+func (logger *Logger) Infoln(args ...interface{}) {
+	if logger.Level >= InfoLevel {
+		NewEntry(logger).Infoln(args...)
+	}
+}
+
+func (logger *Logger) Println(args ...interface{}) {
+	NewEntry(logger).Println(args...)
+}
+
+func (logger *Logger) Warnln(args ...interface{}) {
+	if logger.Level >= WarnLevel {
+		NewEntry(logger).Warnln(args...)
+	}
+}
+
+func (logger *Logger) Warningln(args ...interface{}) {
+	if logger.Level >= WarnLevel {
+		NewEntry(logger).Warnln(args...)
+	}
+}
+
+func (logger *Logger) Errorln(args ...interface{}) {
+	if logger.Level >= ErrorLevel {
+		NewEntry(logger).Errorln(args...)
+	}
+}
+
+func (logger *Logger) Fatalln(args ...interface{}) {
+	if logger.Level >= FatalLevel {
+		NewEntry(logger).Fatalln(args...)
+	}
+	os.Exit(1)
+}
+
+func (logger *Logger) Panicln(args ...interface{}) {
+	if logger.Level >= PanicLevel {
+		NewEntry(logger).Panicln(args...)
+	}
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/logrus.go

@@ -0,0 +1,143 @@
+package logrus
+
+import (
+	"fmt"
+	"log"
+	"strings"
+)
+
+// Fields type, used to pass to `WithFields`.
+type Fields map[string]interface{}
+
+// Level type
+type Level uint8
+
+// Convert the Level to a string. E.g. PanicLevel becomes "panic".
+func (level Level) String() string {
+	switch level {
+	case DebugLevel:
+		return "debug"
+	case InfoLevel:
+		return "info"
+	case WarnLevel:
+		return "warning"
+	case ErrorLevel:
+		return "error"
+	case FatalLevel:
+		return "fatal"
+	case PanicLevel:
+		return "panic"
+	}
+
+	return "unknown"
+}
+
+// ParseLevel takes a string level and returns the Logrus log level constant.
+func ParseLevel(lvl string) (Level, error) {
+	switch strings.ToLower(lvl) {
+	case "panic":
+		return PanicLevel, nil
+	case "fatal":
+		return FatalLevel, nil
+	case "error":
+		return ErrorLevel, nil
+	case "warn", "warning":
+		return WarnLevel, nil
+	case "info":
+		return InfoLevel, nil
+	case "debug":
+		return DebugLevel, nil
+	}
+
+	var l Level
+	return l, fmt.Errorf("not a valid logrus Level: %q", lvl)
+}
+
+// A constant exposing all logging levels
+var AllLevels = []Level{
+	PanicLevel,
+	FatalLevel,
+	ErrorLevel,
+	WarnLevel,
+	InfoLevel,
+	DebugLevel,
+}
+
+// These are the different logging levels. You can set the logging level to log
+// on your instance of logger, obtained with `logrus.New()`.
+const (
+	// PanicLevel level, highest level of severity. Logs and then calls panic with the
+	// message passed to Debug, Info, ...
+	PanicLevel Level = iota
+	// FatalLevel level. Logs and then calls `os.Exit(1)`. It will exit even if the
+	// logging level is set to Panic.
+	FatalLevel
+	// ErrorLevel level. Logs. Used for errors that should definitely be noted.
+	// Commonly used for hooks to send errors to an error tracking service.
+	ErrorLevel
+	// WarnLevel level. Non-critical entries that deserve eyes.
+	WarnLevel
+	// InfoLevel level. General operational entries about what's going on inside the
+	// application.
+	InfoLevel
+	// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
+	DebugLevel
+)
+
+// Won't compile if StdLogger can't be realized by a log.Logger
+var (
+	_ StdLogger = &log.Logger{}
+	_ StdLogger = &Entry{}
+	_ StdLogger = &Logger{}
+)
+
+// StdLogger is what your logrus-enabled library should take, that way
+// it'll accept a stdlib logger and a logrus logger. There's no standard
+// interface, this is the closest we get, unfortunately.
+type StdLogger interface {
+	Print(...interface{})
+	Printf(string, ...interface{})
+	Println(...interface{})
+
+	Fatal(...interface{})
+	Fatalf(string, ...interface{})
+	Fatalln(...interface{})
+
+	Panic(...interface{})
+	Panicf(string, ...interface{})
+	Panicln(...interface{})
+}
+
+// The FieldLogger interface generalizes the Entry and Logger types
+type FieldLogger interface {
+	WithField(key string, value interface{}) *Entry
+	WithFields(fields Fields) *Entry
+	WithError(err error) *Entry
+
+	Debugf(format string, args ...interface{})
+	Infof(format string, args ...interface{})
+	Printf(format string, args ...interface{})
+	Warnf(format string, args ...interface{})
+	Warningf(format string, args ...interface{})
+	Errorf(format string, args ...interface{})
+	Fatalf(format string, args ...interface{})
+	Panicf(format string, args ...interface{})
+
+	Debug(args ...interface{})
+	Info(args ...interface{})
+	Print(args ...interface{})
+	Warn(args ...interface{})
+	Warning(args ...interface{})
+	Error(args ...interface{})
+	Fatal(args ...interface{})
+	Panic(args ...interface{})
+
+	Debugln(args ...interface{})
+	Infoln(args ...interface{})
+	Println(args ...interface{})
+	Warnln(args ...interface{})
+	Warningln(args ...interface{})
+	Errorln(args ...interface{})
+	Fatalln(args ...interface{})
+	Panicln(args ...interface{})
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/logrus_test.go

@@ -0,0 +1,361 @@
+package logrus
+
+import (
+	"bytes"
+	"encoding/json"
+	"strconv"
+	"strings"
+	"sync"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func LogAndAssertJSON(t *testing.T, log func(*Logger), assertions func(fields Fields)) {
+	var buffer bytes.Buffer
+	var fields Fields
+
+	logger := New()
+	logger.Out = &buffer
+	logger.Formatter = new(JSONFormatter)
+
+	log(logger)
+
+	err := json.Unmarshal(buffer.Bytes(), &fields)
+	assert.Nil(t, err)
+
+	assertions(fields)
+}
+
+func LogAndAssertText(t *testing.T, log func(*Logger), assertions func(fields map[string]string)) {
+	var buffer bytes.Buffer
+
+	logger := New()
+	logger.Out = &buffer
+	logger.Formatter = &TextFormatter{
+		DisableColors: true,
+	}
+
+	log(logger)
+
+	fields := make(map[string]string)
+	for _, kv := range strings.Split(buffer.String(), " ") {
+		if !strings.Contains(kv, "=") {
+			continue
+		}
+		kvArr := strings.Split(kv, "=")
+		key := strings.TrimSpace(kvArr[0])
+		val := kvArr[1]
+		if kvArr[1][0] == '"' {
+			var err error
+			val, err = strconv.Unquote(val)
+			assert.NoError(t, err)
+		}
+		fields[key] = val
+	}
+	assertions(fields)
+}
+
+func TestPrint(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Print("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "test")
+		assert.Equal(t, fields["level"], "info")
+	})
+}
+
+func TestInfo(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Info("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "test")
+		assert.Equal(t, fields["level"], "info")
+	})
+}
+
+func TestWarn(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Warn("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "test")
+		assert.Equal(t, fields["level"], "warning")
+	})
+}
+
+func TestInfolnShouldAddSpacesBetweenStrings(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Infoln("test", "test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "test test")
+	})
+}
+
+func TestInfolnShouldAddSpacesBetweenStringAndNonstring(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Infoln("test", 10)
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "test 10")
+	})
+}
+
+func TestInfolnShouldAddSpacesBetweenTwoNonStrings(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Infoln(10, 10)
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "10 10")
+	})
+}
+
+func TestInfoShouldAddSpacesBetweenTwoNonStrings(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Infoln(10, 10)
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "10 10")
+	})
+}
+
+func TestInfoShouldNotAddSpacesBetweenStringAndNonstring(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Info("test", 10)
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "test10")
+	})
+}
+
+func TestInfoShouldNotAddSpacesBetweenStrings(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.Info("test", "test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "testtest")
+	})
+}
+
+func TestWithFieldsShouldAllowAssignments(t *testing.T) {
+	var buffer bytes.Buffer
+	var fields Fields
+
+	logger := New()
+	logger.Out = &buffer
+	logger.Formatter = new(JSONFormatter)
+
+	localLog := logger.WithFields(Fields{
+		"key1": "value1",
+	})
+
+	localLog.WithField("key2", "value2").Info("test")
+	err := json.Unmarshal(buffer.Bytes(), &fields)
+	assert.Nil(t, err)
+
+	assert.Equal(t, "value2", fields["key2"])
+	assert.Equal(t, "value1", fields["key1"])
+
+	buffer = bytes.Buffer{}
+	fields = Fields{}
+	localLog.Info("test")
+	err = json.Unmarshal(buffer.Bytes(), &fields)
+	assert.Nil(t, err)
+
+	_, ok := fields["key2"]
+	assert.Equal(t, false, ok)
+	assert.Equal(t, "value1", fields["key1"])
+}
+
+func TestUserSuppliedFieldDoesNotOverwriteDefaults(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.WithField("msg", "hello").Info("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "test")
+	})
+}
+
+func TestUserSuppliedMsgFieldHasPrefix(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.WithField("msg", "hello").Info("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["msg"], "test")
+		assert.Equal(t, fields["fields.msg"], "hello")
+	})
+}
+
+func TestUserSuppliedTimeFieldHasPrefix(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.WithField("time", "hello").Info("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["fields.time"], "hello")
+	})
+}
+
+func TestUserSuppliedLevelFieldHasPrefix(t *testing.T) {
+	LogAndAssertJSON(t, func(log *Logger) {
+		log.WithField("level", 1).Info("test")
+	}, func(fields Fields) {
+		assert.Equal(t, fields["level"], "info")
+		assert.Equal(t, fields["fields.level"], 1.0) // JSON has floats only
+	})
+}
+
+func TestDefaultFieldsAreNotPrefixed(t *testing.T) {
+	LogAndAssertText(t, func(log *Logger) {
+		ll := log.WithField("herp", "derp")
+		ll.Info("hello")
+		ll.Info("bye")
+	}, func(fields map[string]string) {
+		for _, fieldName := range []string{"fields.level", "fields.time", "fields.msg"} {
+			if _, ok := fields[fieldName]; ok {
+				t.Fatalf("should not have prefixed %q: %v", fieldName, fields)
+			}
+		}
+	})
+}
+
+func TestDoubleLoggingDoesntPrefixPreviousFields(t *testing.T) {
+
+	var buffer bytes.Buffer
+	var fields Fields
+
+	logger := New()
+	logger.Out = &buffer
+	logger.Formatter = new(JSONFormatter)
+
+	llog := logger.WithField("context", "eating raw fish")
+
+	llog.Info("looks delicious")
+
+	err := json.Unmarshal(buffer.Bytes(), &fields)
+	assert.NoError(t, err, "should have decoded first message")
+	assert.Equal(t, len(fields), 4, "should only have msg/time/level/context fields")
+	assert.Equal(t, fields["msg"], "looks delicious")
+	assert.Equal(t, fields["context"], "eating raw fish")
+
+	buffer.Reset()
+
+	llog.Warn("omg it is!")
+
+	err = json.Unmarshal(buffer.Bytes(), &fields)
+	assert.NoError(t, err, "should have decoded second message")
+	assert.Equal(t, len(fields), 4, "should only have msg/time/level/context fields")
+	assert.Equal(t, fields["msg"], "omg it is!")
+	assert.Equal(t, fields["context"], "eating raw fish")
+	assert.Nil(t, fields["fields.msg"], "should not have prefixed previous `msg` entry")
+
+}
+
+func TestConvertLevelToString(t *testing.T) {
+	assert.Equal(t, "debug", DebugLevel.String())
+	assert.Equal(t, "info", InfoLevel.String())
+	assert.Equal(t, "warning", WarnLevel.String())
+	assert.Equal(t, "error", ErrorLevel.String())
+	assert.Equal(t, "fatal", FatalLevel.String())
+	assert.Equal(t, "panic", PanicLevel.String())
+}
+
+func TestParseLevel(t *testing.T) {
+	l, err := ParseLevel("panic")
+	assert.Nil(t, err)
+	assert.Equal(t, PanicLevel, l)
+
+	l, err = ParseLevel("PANIC")
+	assert.Nil(t, err)
+	assert.Equal(t, PanicLevel, l)
+
+	l, err = ParseLevel("fatal")
+	assert.Nil(t, err)
+	assert.Equal(t, FatalLevel, l)
+
+	l, err = ParseLevel("FATAL")
+	assert.Nil(t, err)
+	assert.Equal(t, FatalLevel, l)
+
+	l, err = ParseLevel("error")
+	assert.Nil(t, err)
+	assert.Equal(t, ErrorLevel, l)
+
+	l, err = ParseLevel("ERROR")
+	assert.Nil(t, err)
+	assert.Equal(t, ErrorLevel, l)
+
+	l, err = ParseLevel("warn")
+	assert.Nil(t, err)
+	assert.Equal(t, WarnLevel, l)
+
+	l, err = ParseLevel("WARN")
+	assert.Nil(t, err)
+	assert.Equal(t, WarnLevel, l)
+
+	l, err = ParseLevel("warning")
+	assert.Nil(t, err)
+	assert.Equal(t, WarnLevel, l)
+
+	l, err = ParseLevel("WARNING")
+	assert.Nil(t, err)
+	assert.Equal(t, WarnLevel, l)
+
+	l, err = ParseLevel("info")
+	assert.Nil(t, err)
+	assert.Equal(t, InfoLevel, l)
+
+	l, err = ParseLevel("INFO")
+	assert.Nil(t, err)
+	assert.Equal(t, InfoLevel, l)
+
+	l, err = ParseLevel("debug")
+	assert.Nil(t, err)
+	assert.Equal(t, DebugLevel, l)
+
+	l, err = ParseLevel("DEBUG")
+	assert.Nil(t, err)
+	assert.Equal(t, DebugLevel, l)
+
+	l, err = ParseLevel("invalid")
+	assert.Equal(t, "not a valid logrus Level: \"invalid\"", err.Error())
+}
+
+func TestGetSetLevelRace(t *testing.T) {
+	wg := sync.WaitGroup{}
+	for i := 0; i < 100; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			if i%2 == 0 {
+				SetLevel(InfoLevel)
+			} else {
+				GetLevel()
+			}
+		}(i)
+
+	}
+	wg.Wait()
+}
+
+func TestLoggingRace(t *testing.T) {
+	logger := New()
+
+	var wg sync.WaitGroup
+	wg.Add(100)
+
+	for i := 0; i < 100; i++ {
+		go func() {
+			logger.Info("info")
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+}
+
+// Compile test
+func TestLogrusInterface(t *testing.T) {
+	var buffer bytes.Buffer
+	fn := func(l FieldLogger) {
+		b := l.WithField("key", "value")
+		b.Debug("Test")
+	}
+	// test logger
+	logger := New()
+	logger.Out = &buffer
+	fn(logger)
+
+	// test Entry
+	e := logger.WithField("another", "value")
+	fn(e)
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/terminal_bsd.go

@@ -0,0 +1,9 @@
+// +build darwin freebsd openbsd netbsd dragonfly
+
+package logrus
+
+import "syscall"
+
+const ioctlReadTermios = syscall.TIOCGETA
+
+type Termios syscall.Termios

Godeps/_workspace/src/github.com/Sirupsen/logrus/terminal_linux.go

@@ -0,0 +1,12 @@
+// Based on ssh/terminal:
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package logrus
+
+import "syscall"
+
+const ioctlReadTermios = syscall.TCGETS
+
+type Termios syscall.Termios

Godeps/_workspace/src/github.com/Sirupsen/logrus/terminal_notwindows.go

@@ -0,0 +1,21 @@
+// Based on ssh/terminal:
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux darwin freebsd openbsd netbsd dragonfly
+
+package logrus
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// IsTerminal returns true if stderr's file descriptor is a terminal.
+func IsTerminal() bool {
+	fd := syscall.Stderr
+	var termios Termios
+	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
+	return err == 0
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/terminal_solaris.go

@@ -0,0 +1,15 @@
+// +build solaris
+
+package logrus
+
+import (
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+// IsTerminal returns true if the given file descriptor is a terminal.
+func IsTerminal() bool {
+	_, err := unix.IoctlGetTermios(int(os.Stdout.Fd()), unix.TCGETA)
+	return err == nil
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/terminal_windows.go

@@ -0,0 +1,27 @@
+// Based on ssh/terminal:
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build windows
+
+package logrus
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+var kernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+var (
+	procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
+)
+
+// IsTerminal returns true if stderr's file descriptor is a terminal.
+func IsTerminal() bool {
+	fd := syscall.Stderr
+	var st uint32
+	r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, uintptr(fd), uintptr(unsafe.Pointer(&st)), 0)
+	return r != 0 && e == 0
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/text_formatter.go

@@ -0,0 +1,161 @@
+package logrus
+
+import (
+	"bytes"
+	"fmt"
+	"runtime"
+	"sort"
+	"strings"
+	"time"
+)
+
+const (
+	nocolor = 0
+	red     = 31
+	green   = 32
+	yellow  = 33
+	blue    = 34
+	gray    = 37
+)
+
+var (
+	baseTimestamp time.Time
+	isTerminal    bool
+)
+
+func init() {
+	baseTimestamp = time.Now()
+	isTerminal = IsTerminal()
+}
+
+func miniTS() int {
+	return int(time.Since(baseTimestamp) / time.Second)
+}
+
+type TextFormatter struct {
+	// Set to true to bypass checking for a TTY before outputting colors.
+	ForceColors bool
+
+	// Force disabling colors.
+	DisableColors bool
+
+	// Disable timestamp logging. useful when output is redirected to logging
+	// system that already adds timestamps.
+	DisableTimestamp bool
+
+	// Enable logging the full timestamp when a TTY is attached instead of just
+	// the time passed since beginning of execution.
+	FullTimestamp bool
+
+	// TimestampFormat to use for display when a full timestamp is printed
+	TimestampFormat string
+
+	// The fields are sorted by default for a consistent output. For applications
+	// that log extremely frequently and don't use the JSON formatter this may not
+	// be desired.
+	DisableSorting bool
+}
+
+func (f *TextFormatter) Format(entry *Entry) ([]byte, error) {
+	var keys []string = make([]string, 0, len(entry.Data))
+	for k := range entry.Data {
+		keys = append(keys, k)
+	}
+
+	if !f.DisableSorting {
+		sort.Strings(keys)
+	}
+
+	b := &bytes.Buffer{}
+
+	prefixFieldClashes(entry.Data)
+
+	isColorTerminal := isTerminal && (runtime.GOOS != "windows")
+	isColored := (f.ForceColors || isColorTerminal) && !f.DisableColors
+
+	timestampFormat := f.TimestampFormat
+	if timestampFormat == "" {
+		timestampFormat = DefaultTimestampFormat
+	}
+	if isColored {
+		f.printColored(b, entry, keys, timestampFormat)
+	} else {
+		if !f.DisableTimestamp {
+			f.appendKeyValue(b, "time", entry.Time.Format(timestampFormat))
+		}
+		f.appendKeyValue(b, "level", entry.Level.String())
+		if entry.Message != "" {
+			f.appendKeyValue(b, "msg", entry.Message)
+		}
+		for _, key := range keys {
+			f.appendKeyValue(b, key, entry.Data[key])
+		}
+	}
+
+	b.WriteByte('\n')
+	return b.Bytes(), nil
+}
+
+func (f *TextFormatter) printColored(b *bytes.Buffer, entry *Entry, keys []string, timestampFormat string) {
+	var levelColor int
+	switch entry.Level {
+	case DebugLevel:
+		levelColor = gray
+	case WarnLevel:
+		levelColor = yellow
+	case ErrorLevel, FatalLevel, PanicLevel:
+		levelColor = red
+	default:
+		levelColor = blue
+	}
+
+	levelText := strings.ToUpper(entry.Level.String())[0:4]
+
+	if !f.FullTimestamp {
+		fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%04d] %-44s ", levelColor, levelText, miniTS(), entry.Message)
+	} else {
+		fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%s] %-44s ", levelColor, levelText, entry.Time.Format(timestampFormat), entry.Message)
+	}
+	for _, k := range keys {
+		v := entry.Data[k]
+		fmt.Fprintf(b, " \x1b[%dm%s\x1b[0m=%+v", levelColor, k, v)
+	}
+}
+
+func needsQuoting(text string) bool {
+	for _, ch := range text {
+		if !((ch >= 'a' && ch <= 'z') ||
+			(ch >= 'A' && ch <= 'Z') ||
+			(ch >= '0' && ch <= '9') ||
+			ch == '-' || ch == '.') {
+			return true
+		}
+	}
+	return false
+}
+
+func (f *TextFormatter) appendKeyValue(b *bytes.Buffer, key string, value interface{}) {
+
+	b.WriteString(key)
+	b.WriteByte('=')
+
+	switch value := value.(type) {
+	case string:
+		if !needsQuoting(value) {
+			b.WriteString(value)
+		} else {
+			fmt.Fprintf(b, "%q", value)
+		}
+	case error:
+		errmsg := value.Error()
+		if !needsQuoting(errmsg) {
+			b.WriteString(errmsg)
+		} else {
+			fmt.Fprintf(b, "%q", value)
+		}
+	default:
+		fmt.Fprint(b, value)
+	}
+
+	b.WriteByte(' ')
+}

Godeps/_workspace/src/github.com/Sirupsen/logrus/text_formatter_test.go

@@ -0,0 +1,61 @@
+package logrus
+
+import (
+	"bytes"
+	"errors"
+	"testing"
+	"time"
+)
+
+func TestQuoting(t *testing.T) {
+	tf := &TextFormatter{DisableColors: true}
+
+	checkQuoting := func(q bool, value interface{}) {
+		b, _ := tf.Format(WithField("test", value))
+		idx := bytes.Index(b, ([]byte)("test="))
+		cont := bytes.Contains(b[idx+5:], []byte{'"'})
+		if cont != q {
+			if q {
+				t.Errorf("quoting expected for: %#v", value)
+			} else {
+				t.Errorf("quoting not expected for: %#v", value)
+			}
+		}
+	}
+
+	checkQuoting(false, "abcd")
+	checkQuoting(false, "v1.0")
+	checkQuoting(false, "1234567890")
+	checkQuoting(true, "/foobar")
+	checkQuoting(true, "x y")
+	checkQuoting(true, "x,y")
+	checkQuoting(false, errors.New("invalid"))
+	checkQuoting(true, errors.New("invalid argument"))
+}
+
+func TestTimestampFormat(t *testing.T) {
+	checkTimeStr := func(format string) {
+		customFormatter := &TextFormatter{DisableColors: true, TimestampFormat: format}
+		customStr, _ := customFormatter.Format(WithField("test", "test"))
+		timeStart := bytes.Index(customStr, ([]byte)("time="))
+		timeEnd := bytes.Index(customStr, ([]byte)("level="))
+		timeStr := customStr[timeStart+5 : timeEnd-1]
+		if timeStr[0] == '"' && timeStr[len(timeStr)-1] == '"' {
+			timeStr = timeStr[1 : len(timeStr)-1]
+		}
+		if format == "" {
+			format = time.RFC3339
+		}
+		_, e := time.Parse(format, (string)(timeStr))
+		if e != nil {
+			t.Errorf("time string \"%s\" did not match provided time format \"%s\": %s", timeStr, format, e)
+		}
+	}
+
+	checkTimeStr("2006-01-02T15:04:05.000000000Z07:00")
+	checkTimeStr("Mon Jan _2 15:04:05 2006")
+	checkTimeStr("")
+}
+
+// TODO add tests for sorting etc., this requires a parser for the text
+// formatter output.

Godeps/_workspace/src/github.com/Sirupsen/logrus/writer.go

@@ -0,0 +1,53 @@
+package logrus
+
+import (
+	"bufio"
+	"io"
+	"runtime"
+)
+
+func (logger *Logger) Writer() *io.PipeWriter {
+	return logger.WriterLevel(InfoLevel)
+}
+
+func (logger *Logger) WriterLevel(level Level) *io.PipeWriter {
+	reader, writer := io.Pipe()
+
+	var printFunc func(args ...interface{})
+	switch level {
+	case DebugLevel:
+		printFunc = logger.Debug
+	case InfoLevel:
+		printFunc = logger.Info
+	case WarnLevel:
+		printFunc = logger.Warn
+	case ErrorLevel:
+		printFunc = logger.Error
+	case FatalLevel:
+		printFunc = logger.Fatal
+	case PanicLevel:
+		printFunc = logger.Panic
+	default:
+		printFunc = logger.Print
+	}
+
+	go logger.writerScanner(reader, printFunc)
+	runtime.SetFinalizer(writer, writerFinalizer)
+
+	return writer
+}
+
+func (logger *Logger) writerScanner(reader *io.PipeReader, printFunc func(args ...interface{})) {
+	scanner := bufio.NewScanner(reader)
+	for scanner.Scan() {
+		printFunc(scanner.Text())
+	}
+	if err := scanner.Err(); err != nil {
+		logger.Errorf("Error while reading from Writer: %s", err)
+	}
+	reader.Close()
+}
+
+func writerFinalizer(writer *io.PipeWriter) {
+	writer.Close()
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/activation/files.go

@@ -0,0 +1,52 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package activation implements primitives for systemd socket activation.
+package activation
+
+import (
+	"os"
+	"strconv"
+	"syscall"
+)
+
+// based on: https://gist.github.com/alberts/4640792
+const (
+	listenFdsStart = 3
+)
+
+func Files(unsetEnv bool) []*os.File {
+	if unsetEnv {
+		defer os.Unsetenv("LISTEN_PID")
+		defer os.Unsetenv("LISTEN_FDS")
+	}
+
+	pid, err := strconv.Atoi(os.Getenv("LISTEN_PID"))
+	if err != nil || pid != os.Getpid() {
+		return nil
+	}
+
+	nfds, err := strconv.Atoi(os.Getenv("LISTEN_FDS"))
+	if err != nil || nfds == 0 {
+		return nil
+	}
+
+	files := make([]*os.File, 0, nfds)
+	for fd := listenFdsStart; fd < listenFdsStart+nfds; fd++ {
+		syscall.CloseOnExec(fd)
+		files = append(files, os.NewFile(uintptr(fd), "LISTEN_FD_"+strconv.Itoa(fd)))
+	}
+
+	return files
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/activation/files_test.go

@@ -0,0 +1,82 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package activation
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"os/exec"
+	"testing"
+)
+
+// correctStringWritten fails the text if the correct string wasn't written
+// to the other side of the pipe.
+func correctStringWritten(t *testing.T, r *os.File, expected string) bool {
+	bytes := make([]byte, len(expected))
+	io.ReadAtLeast(r, bytes, len(expected))
+
+	if string(bytes) != expected {
+		t.Fatalf("Unexpected string %s", string(bytes))
+	}
+
+	return true
+}
+
+// TestActivation forks out a copy of activation.go example and reads back two
+// strings from the pipes that are passed in.
+func TestActivation(t *testing.T) {
+	cmd := exec.Command("go", "run", "../examples/activation/activation.go")
+
+	r1, w1, _ := os.Pipe()
+	r2, w2, _ := os.Pipe()
+	cmd.ExtraFiles = []*os.File{
+		w1,
+		w2,
+	}
+
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, "LISTEN_FDS=2", "FIX_LISTEN_PID=1")
+
+	err := cmd.Run()
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+
+	correctStringWritten(t, r1, "Hello world")
+	correctStringWritten(t, r2, "Goodbye world")
+}
+
+func TestActivationNoFix(t *testing.T) {
+	cmd := exec.Command("go", "run", "../examples/activation/activation.go")
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, "LISTEN_FDS=2")
+
+	out, _ := cmd.CombinedOutput()
+	if bytes.Contains(out, []byte("No files")) == false {
+		t.Fatalf("Child didn't error out as expected")
+	}
+}
+
+func TestActivationNoFiles(t *testing.T) {
+	cmd := exec.Command("go", "run", "../examples/activation/activation.go")
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, "LISTEN_FDS=0", "FIX_LISTEN_PID=1")
+
+	out, _ := cmd.CombinedOutput()
+	if bytes.Contains(out, []byte("No files")) == false {
+		t.Fatalf("Child didn't error out as expected")
+	}
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/activation/listeners.go

@@ -0,0 +1,62 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package activation
+
+import (
+	"crypto/tls"
+	"net"
+)
+
+// Listeners returns a slice containing a net.Listener for each matching socket type
+// passed to this process.
+//
+// The order of the file descriptors is preserved in the returned slice.
+// Nil values are used to fill any gaps. For example if systemd were to return file descriptors
+// corresponding with "udp, tcp, tcp", then the slice would contain {nil, net.Listener, net.Listener}
+func Listeners(unsetEnv bool) ([]net.Listener, error) {
+	files := Files(unsetEnv)
+	listeners := make([]net.Listener, len(files))
+
+	for i, f := range files {
+		if pc, err := net.FileListener(f); err == nil {
+			listeners[i] = pc
+		}
+	}
+	return listeners, nil
+}
+
+// TLSListeners returns a slice containing a net.listener for each matching TCP socket type
+// passed to this process.
+// It uses default Listeners func and forces TCP sockets handlers to use TLS based on tlsConfig.
+func TLSListeners(unsetEnv bool, tlsConfig *tls.Config) ([]net.Listener, error) {
+	listeners, err := Listeners(unsetEnv)
+
+	if listeners == nil || err != nil {
+		return nil, err
+	}
+
+	if tlsConfig != nil && err == nil {
+		tlsConfig.NextProtos = []string{"http/1.1"}
+
+		for i, l := range listeners {
+			// Activate TLS only for TCP sockets
+			if l.Addr().Network() == "tcp" {
+				listeners[i] = tls.NewListener(l, tlsConfig)
+			}
+		}
+	}
+
+	return listeners, err
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/activation/listeners_test.go

@@ -0,0 +1,86 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package activation
+
+import (
+	"io"
+	"net"
+	"os"
+	"os/exec"
+	"testing"
+)
+
+// correctStringWritten fails the text if the correct string wasn't written
+// to the other side of the pipe.
+func correctStringWrittenNet(t *testing.T, r net.Conn, expected string) bool {
+	bytes := make([]byte, len(expected))
+	io.ReadAtLeast(r, bytes, len(expected))
+
+	if string(bytes) != expected {
+		t.Fatalf("Unexpected string %s", string(bytes))
+	}
+
+	return true
+}
+
+// TestActivation forks out a copy of activation.go example and reads back two
+// strings from the pipes that are passed in.
+func TestListeners(t *testing.T) {
+	cmd := exec.Command("go", "run", "../examples/activation/listen.go")
+
+	l1, err := net.Listen("tcp", ":9999")
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+	l2, err := net.Listen("tcp", ":1234")
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+
+	t1 := l1.(*net.TCPListener)
+	t2 := l2.(*net.TCPListener)
+
+	f1, _ := t1.File()
+	f2, _ := t2.File()
+
+	cmd.ExtraFiles = []*os.File{
+		f1,
+		f2,
+	}
+
+	r1, err := net.Dial("tcp", "127.0.0.1:9999")
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+	r1.Write([]byte("Hi"))
+
+	r2, err := net.Dial("tcp", "127.0.0.1:1234")
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+	r2.Write([]byte("Hi"))
+
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, "LISTEN_FDS=2", "FIX_LISTEN_PID=1")
+
+	out, err := cmd.Output()
+	if err != nil {
+		println(string(out))
+		t.Fatalf(err.Error())
+	}
+
+	correctStringWrittenNet(t, r1, "Hello world")
+	correctStringWrittenNet(t, r2, "Goodbye world")
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/activation/packetconns.go

@@ -0,0 +1,37 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package activation
+
+import (
+	"net"
+)
+
+// PacketConns returns a slice containing a net.PacketConn for each matching socket type
+// passed to this process.
+//
+// The order of the file descriptors is preserved in the returned slice.
+// Nil values are used to fill any gaps. For example if systemd were to return file descriptors
+// corresponding with "udp, tcp, udp", then the slice would contain {net.PacketConn, nil, net.PacketConn}
+func PacketConns(unsetEnv bool) ([]net.PacketConn, error) {
+	files := Files(unsetEnv)
+	conns := make([]net.PacketConn, len(files))
+
+	for i, f := range files {
+		if pc, err := net.FilePacketConn(f); err == nil {
+			conns[i] = pc
+		}
+	}
+	return conns, nil
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/activation/packetconns_test.go

@@ -0,0 +1,68 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package activation
+
+import (
+	"net"
+	"os"
+	"os/exec"
+	"testing"
+)
+
+// TestActivation forks out a copy of activation.go example and reads back two
+// strings from the pipes that are passed in.
+func TestPacketConns(t *testing.T) {
+	cmd := exec.Command("go", "run", "../examples/activation/udpconn.go")
+
+	u1, err := net.ListenUDP("udp", &net.UDPAddr{Port: 9999})
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+	u2, err := net.ListenUDP("udp", &net.UDPAddr{Port: 1234})
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+
+	f1, _ := u1.File()
+	f2, _ := u2.File()
+
+	cmd.ExtraFiles = []*os.File{
+		f1,
+		f2,
+	}
+
+	r1, err := net.Dial("udp", "127.0.0.1:9999")
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+	r1.Write([]byte("Hi"))
+
+	r2, err := net.Dial("udp", "127.0.0.1:1234")
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
+	r2.Write([]byte("Hi"))
+
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, "LISTEN_FDS=2", "FIX_LISTEN_PID=1")
+
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		t.Fatalf("Cmd output '%s', err: '%s'\n", out, err)
+	}
+
+	correctStringWrittenNet(t, r1, "Hello world")
+	correctStringWrittenNet(t, r2, "Goodbye world")
+}

Godeps/_workspace/src/github.com/docker/distribution/registry/api/errcode/errors.go

@@ -0,0 +1,259 @@
+package errcode
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+// ErrorCoder is the base interface for ErrorCode and Error allowing
+// users of each to just call ErrorCode to get the real ID of each
+type ErrorCoder interface {
+	ErrorCode() ErrorCode
+}
+
+// ErrorCode represents the error type. The errors are serialized via strings
+// and the integer format may change and should *never* be exported.
+type ErrorCode int
+
+var _ error = ErrorCode(0)
+
+// ErrorCode just returns itself
+func (ec ErrorCode) ErrorCode() ErrorCode {
+	return ec
+}
+
+// Error returns the ID/Value
+func (ec ErrorCode) Error() string {
+	return ec.Descriptor().Value
+}
+
+// Descriptor returns the descriptor for the error code.
+func (ec ErrorCode) Descriptor() ErrorDescriptor {
+	d, ok := errorCodeToDescriptors[ec]
+
+	if !ok {
+		return ErrorCodeUnknown.Descriptor()
+	}
+
+	return d
+}
+
+// String returns the canonical identifier for this error code.
+func (ec ErrorCode) String() string {
+	return ec.Descriptor().Value
+}
+
+// Message returned the human-readable error message for this error code.
+func (ec ErrorCode) Message() string {
+	return ec.Descriptor().Message
+}
+
+// MarshalText encodes the receiver into UTF-8-encoded text and returns the
+// result.
+func (ec ErrorCode) MarshalText() (text []byte, err error) {
+	return []byte(ec.String()), nil
+}
+
+// UnmarshalText decodes the form generated by MarshalText.
+func (ec *ErrorCode) UnmarshalText(text []byte) error {
+	desc, ok := idToDescriptors[string(text)]
+
+	if !ok {
+		desc = ErrorCodeUnknown.Descriptor()
+	}
+
+	*ec = desc.Code
+
+	return nil
+}
+
+// WithDetail creates a new Error struct based on the passed-in info and
+// set the Detail property appropriately
+func (ec ErrorCode) WithDetail(detail interface{}) Error {
+	return Error{
+		Code:    ec,
+		Message: ec.Message(),
+	}.WithDetail(detail)
+}
+
+// WithArgs creates a new Error struct and sets the Args slice
+func (ec ErrorCode) WithArgs(args ...interface{}) Error {
+	return Error{
+		Code:    ec,
+		Message: ec.Message(),
+	}.WithArgs(args...)
+}
+
+// Error provides a wrapper around ErrorCode with extra Details provided.
+type Error struct {
+	Code    ErrorCode   `json:"code"`
+	Message string      `json:"message"`
+	Detail  interface{} `json:"detail,omitempty"`
+
+	// TODO(duglin): See if we need an "args" property so we can do the
+	// variable substitution right before showing the message to the user
+}
+
+var _ error = Error{}
+
+// ErrorCode returns the ID/Value of this Error
+func (e Error) ErrorCode() ErrorCode {
+	return e.Code
+}
+
+// Error returns a human readable representation of the error.
+func (e Error) Error() string {
+	return fmt.Sprintf("%s: %s",
+		strings.ToLower(strings.Replace(e.Code.String(), "_", " ", -1)),
+		e.Message)
+}
+
+// WithDetail will return a new Error, based on the current one, but with
+// some Detail info added
+func (e Error) WithDetail(detail interface{}) Error {
+	return Error{
+		Code:    e.Code,
+		Message: e.Message,
+		Detail:  detail,
+	}
+}
+
+// WithArgs uses the passed-in list of interface{} as the substitution
+// variables in the Error's Message string, but returns a new Error
+func (e Error) WithArgs(args ...interface{}) Error {
+	return Error{
+		Code:    e.Code,
+		Message: fmt.Sprintf(e.Code.Message(), args...),
+		Detail:  e.Detail,
+	}
+}
+
+// ErrorDescriptor provides relevant information about a given error code.
+type ErrorDescriptor struct {
+	// Code is the error code that this descriptor describes.
+	Code ErrorCode
+
+	// Value provides a unique, string key, often captilized with
+	// underscores, to identify the error code. This value is used as the
+	// keyed value when serializing api errors.
+	Value string
+
+	// Message is a short, human readable decription of the error condition
+	// included in API responses.
+	Message string
+
+	// Description provides a complete account of the errors purpose, suitable
+	// for use in documentation.
+	Description string
+
+	// HTTPStatusCode provides the http status code that is associated with
+	// this error condition.
+	HTTPStatusCode int
+}
+
+// ParseErrorCode returns the value by the string error code.
+// `ErrorCodeUnknown` will be returned if the error is not known.
+func ParseErrorCode(value string) ErrorCode {
+	ed, ok := idToDescriptors[value]
+	if ok {
+		return ed.Code
+	}
+
+	return ErrorCodeUnknown
+}
+
+// Errors provides the envelope for multiple errors and a few sugar methods
+// for use within the application.
+type Errors []error
+
+var _ error = Errors{}
+
+func (errs Errors) Error() string {
+	switch len(errs) {
+	case 0:
+		return "<nil>"
+	case 1:
+		return errs[0].Error()
+	default:
+		msg := "errors:\n"
+		for _, err := range errs {
+			msg += err.Error() + "\n"
+		}
+		return msg
+	}
+}
+
+// Len returns the current number of errors.
+func (errs Errors) Len() int {
+	return len(errs)
+}
+
+// MarshalJSON converts slice of error, ErrorCode or Error into a
+// slice of Error - then serializes
+func (errs Errors) MarshalJSON() ([]byte, error) {
+	var tmpErrs struct {
+		Errors []Error `json:"errors,omitempty"`
+	}
+
+	for _, daErr := range errs {
+		var err Error
+
+		switch daErr.(type) {
+		case ErrorCode:
+			err = daErr.(ErrorCode).WithDetail(nil)
+		case Error:
+			err = daErr.(Error)
+		default:
+			err = ErrorCodeUnknown.WithDetail(daErr)
+
+		}
+
+		// If the Error struct was setup and they forgot to set the
+		// Message field (meaning its "") then grab it from the ErrCode
+		msg := err.Message
+		if msg == "" {
+			msg = err.Code.Message()
+		}
+
+		tmpErrs.Errors = append(tmpErrs.Errors, Error{
+			Code:    err.Code,
+			Message: msg,
+			Detail:  err.Detail,
+		})
+	}
+
+	return json.Marshal(tmpErrs)
+}
+
+// UnmarshalJSON deserializes []Error and then converts it into slice of
+// Error or ErrorCode
+func (errs *Errors) UnmarshalJSON(data []byte) error {
+	var tmpErrs struct {
+		Errors []Error
+	}
+
+	if err := json.Unmarshal(data, &tmpErrs); err != nil {
+		return err
+	}
+
+	var newErrs Errors
+	for _, daErr := range tmpErrs.Errors {
+		// If Message is empty or exactly matches the Code's message string
+		// then just use the Code, no need for a full Error struct
+		if daErr.Detail == nil && (daErr.Message == "" || daErr.Message == daErr.Code.Message()) {
+			// Error's w/o details get converted to ErrorCode
+			newErrs = append(newErrs, daErr.Code)
+		} else {
+			// Error's w/ details are untouched
+			newErrs = append(newErrs, Error{
+				Code:    daErr.Code,
+				Message: daErr.Message,
+				Detail:  daErr.Detail,
+			})
+		}
+	}
+
+	*errs = newErrs
+	return nil
+}

Godeps/_workspace/src/github.com/docker/distribution/registry/api/errcode/errors_test.go

@@ -0,0 +1,179 @@
+package errcode
+
+import (
+	"encoding/json"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+// TestErrorCodes ensures that error code format, mappings and
+// marshaling/unmarshaling. round trips are stable.
+func TestErrorCodes(t *testing.T) {
+	if len(errorCodeToDescriptors) == 0 {
+		t.Fatal("errors aren't loaded!")
+	}
+
+	for ec, desc := range errorCodeToDescriptors {
+		if ec != desc.Code {
+			t.Fatalf("error code in descriptor isn't correct, %q != %q", ec, desc.Code)
+		}
+
+		if idToDescriptors[desc.Value].Code != ec {
+			t.Fatalf("error code in idToDesc isn't correct, %q != %q", idToDescriptors[desc.Value].Code, ec)
+		}
+
+		if ec.Message() != desc.Message {
+			t.Fatalf("ec.Message doesn't mtach desc.Message: %q != %q", ec.Message(), desc.Message)
+		}
+
+		// Test (de)serializing the ErrorCode
+		p, err := json.Marshal(ec)
+		if err != nil {
+			t.Fatalf("couldn't marshal ec %v: %v", ec, err)
+		}
+
+		if len(p) <= 0 {
+			t.Fatalf("expected content in marshaled before for error code %v", ec)
+		}
+
+		// First, unmarshal to interface and ensure we have a string.
+		var ecUnspecified interface{}
+		if err := json.Unmarshal(p, &ecUnspecified); err != nil {
+			t.Fatalf("error unmarshaling error code %v: %v", ec, err)
+		}
+
+		if _, ok := ecUnspecified.(string); !ok {
+			t.Fatalf("expected a string for error code %v on unmarshal got a %T", ec, ecUnspecified)
+		}
+
+		// Now, unmarshal with the error code type and ensure they are equal
+		var ecUnmarshaled ErrorCode
+		if err := json.Unmarshal(p, &ecUnmarshaled); err != nil {
+			t.Fatalf("error unmarshaling error code %v: %v", ec, err)
+		}
+
+		if ecUnmarshaled != ec {
+			t.Fatalf("unexpected error code during error code marshal/unmarshal: %v != %v", ecUnmarshaled, ec)
+		}
+	}
+
+}
+
+// TestErrorsManagement does a quick check of the Errors type to ensure that
+// members are properly pushed and marshaled.
+var ErrorCodeTest1 = Register("v2.errors", ErrorDescriptor{
+	Value:          "TEST1",
+	Message:        "test error 1",
+	Description:    `Just a test message #1.`,
+	HTTPStatusCode: http.StatusInternalServerError,
+})
+
+var ErrorCodeTest2 = Register("v2.errors", ErrorDescriptor{
+	Value:          "TEST2",
+	Message:        "test error 2",
+	Description:    `Just a test message #2.`,
+	HTTPStatusCode: http.StatusNotFound,
+})
+
+var ErrorCodeTest3 = Register("v2.errors", ErrorDescriptor{
+	Value:          "TEST3",
+	Message:        "Sorry %q isn't valid",
+	Description:    `Just a test message #3.`,
+	HTTPStatusCode: http.StatusNotFound,
+})
+
+func TestErrorsManagement(t *testing.T) {
+	var errs Errors
+
+	errs = append(errs, ErrorCodeTest1)
+	errs = append(errs, ErrorCodeTest2.WithDetail(
+		map[string]interface{}{"digest": "sometestblobsumdoesntmatter"}))
+	errs = append(errs, ErrorCodeTest3.WithArgs("BOOGIE"))
+	errs = append(errs, ErrorCodeTest3.WithArgs("BOOGIE").WithDetail("data"))
+
+	p, err := json.Marshal(errs)
+
+	if err != nil {
+		t.Fatalf("error marashaling errors: %v", err)
+	}
+
+	expectedJSON := `{"errors":[` +
+		`{"code":"TEST1","message":"test error 1"},` +
+		`{"code":"TEST2","message":"test error 2","detail":{"digest":"sometestblobsumdoesntmatter"}},` +
+		`{"code":"TEST3","message":"Sorry \"BOOGIE\" isn't valid"},` +
+		`{"code":"TEST3","message":"Sorry \"BOOGIE\" isn't valid","detail":"data"}` +
+		`]}`
+
+	if string(p) != expectedJSON {
+		t.Fatalf("unexpected json:\ngot:\n%q\n\nexpected:\n%q", string(p), expectedJSON)
+	}
+
+	// Now test the reverse
+	var unmarshaled Errors
+	if err := json.Unmarshal(p, &unmarshaled); err != nil {
+		t.Fatalf("unexpected error unmarshaling error envelope: %v", err)
+	}
+
+	if !reflect.DeepEqual(unmarshaled, errs) {
+		t.Fatalf("errors not equal after round trip:\nunmarshaled:\n%#v\n\nerrs:\n%#v", unmarshaled, errs)
+	}
+
+	// Test the arg substitution stuff
+	e1 := unmarshaled[3].(Error)
+	exp1 := `Sorry "BOOGIE" isn't valid`
+	if e1.Message != exp1 {
+		t.Fatalf("Wrong msg, got:\n%q\n\nexpected:\n%q", e1.Message, exp1)
+	}
+
+	exp1 = "test3: " + exp1
+	if e1.Error() != exp1 {
+		t.Fatalf("Error() didn't return the right string, got:%s\nexpected:%s", e1.Error(), exp1)
+	}
+
+	// Test again with a single value this time
+	errs = Errors{ErrorCodeUnknown}
+	expectedJSON = "{\"errors\":[{\"code\":\"UNKNOWN\",\"message\":\"unknown error\"}]}"
+	p, err = json.Marshal(errs)
+
+	if err != nil {
+		t.Fatalf("error marashaling errors: %v", err)
+	}
+
+	if string(p) != expectedJSON {
+		t.Fatalf("unexpected json: %q != %q", string(p), expectedJSON)
+	}
+
+	// Now test the reverse
+	unmarshaled = nil
+	if err := json.Unmarshal(p, &unmarshaled); err != nil {
+		t.Fatalf("unexpected error unmarshaling error envelope: %v", err)
+	}
+
+	if !reflect.DeepEqual(unmarshaled, errs) {
+		t.Fatalf("errors not equal after round trip:\nunmarshaled:\n%#v\n\nerrs:\n%#v", unmarshaled, errs)
+	}
+
+	// Verify that calling WithArgs() more than once does the right thing.
+	// Meaning creates a new Error and uses the ErrorCode Message
+	e1 = ErrorCodeTest3.WithArgs("test1")
+	e2 := e1.WithArgs("test2")
+	if &e1 == &e2 {
+		t.Fatalf("args: e2 and e1 should not be the same, but they are")
+	}
+	if e2.Message != `Sorry "test2" isn't valid` {
+		t.Fatalf("e2 had wrong message: %q", e2.Message)
+	}
+
+	// Verify that calling WithDetail() more than once does the right thing.
+	// Meaning creates a new Error and overwrites the old detail field
+	e1 = ErrorCodeTest3.WithDetail("stuff1")
+	e2 = e1.WithDetail("stuff2")
+	if &e1 == &e2 {
+		t.Fatalf("detail: e2 and e1 should not be the same, but they are")
+	}
+	if e2.Detail != `stuff2` {
+		t.Fatalf("e2 had wrong detail: %q", e2.Detail)
+	}
+
+}

Godeps/_workspace/src/github.com/docker/distribution/registry/api/errcode/handler.go

@@ -0,0 +1,44 @@
+package errcode
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+// ServeJSON attempts to serve the errcode in a JSON envelope. It marshals err
+// and sets the content-type header to 'application/json'. It will handle
+// ErrorCoder and Errors, and if necessary will create an envelope.
+func ServeJSON(w http.ResponseWriter, err error) error {
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	var sc int
+
+	switch errs := err.(type) {
+	case Errors:
+		if len(errs) < 1 {
+			break
+		}
+
+		if err, ok := errs[0].(ErrorCoder); ok {
+			sc = err.ErrorCode().Descriptor().HTTPStatusCode
+		}
+	case ErrorCoder:
+		sc = errs.ErrorCode().Descriptor().HTTPStatusCode
+		err = Errors{err} // create an envelope.
+	default:
+		// We just have an unhandled error type, so just place in an envelope
+		// and move along.
+		err = Errors{err}
+	}
+
+	if sc == 0 {
+		sc = http.StatusInternalServerError
+	}
+
+	w.WriteHeader(sc)
+
+	if err := json.NewEncoder(w).Encode(err); err != nil {
+		return err
+	}
+
+	return nil
+}

Godeps/_workspace/src/github.com/docker/distribution/registry/api/errcode/register.go

@@ -0,0 +1,116 @@
+package errcode
+
+import (
+	"fmt"
+	"net/http"
+	"sort"
+	"sync"
+)
+
+var (
+	errorCodeToDescriptors = map[ErrorCode]ErrorDescriptor{}
+	idToDescriptors        = map[string]ErrorDescriptor{}
+	groupToDescriptors     = map[string][]ErrorDescriptor{}
+)
+
+var (
+	// ErrorCodeUnknown is a generic error that can be used as a last
+	// resort if there is no situation-specific error message that can be used
+	ErrorCodeUnknown = Register("errcode", ErrorDescriptor{
+		Value:   "UNKNOWN",
+		Message: "unknown error",
+		Description: `Generic error returned when the error does not have an
+			                                            API classification.`,
+		HTTPStatusCode: http.StatusInternalServerError,
+	})
+
+	// ErrorCodeUnsupported is returned when an operation is not supported.
+	ErrorCodeUnsupported = Register("errcode", ErrorDescriptor{
+		Value:   "UNSUPPORTED",
+		Message: "The operation is unsupported.",
+		Description: `The operation was unsupported due to a missing
+		implementation or invalid set of parameters.`,
+		HTTPStatusCode: http.StatusMethodNotAllowed,
+	})
+
+	// ErrorCodeUnauthorized is returned if a request is not authorized.
+	ErrorCodeUnauthorized = Register("errcode", ErrorDescriptor{
+		Value:   "UNAUTHORIZED",
+		Message: "access to the requested resource is not authorized",
+		Description: `The access controller denied access for the operation on
+		a resource. Often this will be accompanied by a 401 Unauthorized
+		response status.`,
+		HTTPStatusCode: http.StatusUnauthorized,
+	})
+
+	// ErrorCodeUnavailable provides a common error to report unavialability
+	// of a service or endpoint.
+	ErrorCodeUnavailable = Register("errcode", ErrorDescriptor{
+		Value:          "UNAVAILABLE",
+		Message:        "service unavailable",
+		Description:    "Returned when a service is not available",
+		HTTPStatusCode: http.StatusServiceUnavailable,
+	})
+)
+
+var nextCode = 1000
+var registerLock sync.Mutex
+
+// Register will make the passed-in error known to the environment and
+// return a new ErrorCode
+func Register(group string, descriptor ErrorDescriptor) ErrorCode {
+	registerLock.Lock()
+	defer registerLock.Unlock()
+
+	descriptor.Code = ErrorCode(nextCode)
+
+	if _, ok := idToDescriptors[descriptor.Value]; ok {
+		panic(fmt.Sprintf("ErrorValue %q is already registered", descriptor.Value))
+	}
+	if _, ok := errorCodeToDescriptors[descriptor.Code]; ok {
+		panic(fmt.Sprintf("ErrorCode %v is already registered", descriptor.Code))
+	}
+
+	groupToDescriptors[group] = append(groupToDescriptors[group], descriptor)
+	errorCodeToDescriptors[descriptor.Code] = descriptor
+	idToDescriptors[descriptor.Value] = descriptor
+
+	nextCode++
+	return descriptor.Code
+}
+
+type byValue []ErrorDescriptor
+
+func (a byValue) Len() int           { return len(a) }
+func (a byValue) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a byValue) Less(i, j int) bool { return a[i].Value < a[j].Value }
+
+// GetGroupNames returns the list of Error group names that are registered
+func GetGroupNames() []string {
+	keys := []string{}
+
+	for k := range groupToDescriptors {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	return keys
+}
+
+// GetErrorCodeGroup returns the named group of error descriptors
+func GetErrorCodeGroup(name string) []ErrorDescriptor {
+	desc := groupToDescriptors[name]
+	sort.Sort(byValue(desc))
+	return desc
+}
+
+// GetErrorAllDescriptors returns a slice of all ErrorDescriptors that are
+// registered, irrespective of what group they're in
+func GetErrorAllDescriptors() []ErrorDescriptor {
+	result := []ErrorDescriptor{}
+
+	for _, group := range GetGroupNames() {
+		result = append(result, GetErrorCodeGroup(group)...)
+	}
+	sort.Sort(byValue(result))
+	return result
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/README.md

@@ -0,0 +1 @@
+This code provides helper functions for dealing with archive files.

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/archive_unix.go

@@ -0,0 +1,112 @@
+// +build !windows
+
+package archive
+
+import (
+	"archive/tar"
+	"errors"
+	"os"
+	"path/filepath"
+	"syscall"
+
+	"github.com/docker/docker/pkg/system"
+)
+
+// fixVolumePathPrefix does platform specific processing to ensure that if
+// the path being passed in is not in a volume path format, convert it to one.
+func fixVolumePathPrefix(srcPath string) string {
+	return srcPath
+}
+
+// getWalkRoot calculates the root path when performing a TarWithOptions.
+// We use a separate function as this is platform specific. On Linux, we
+// can't use filepath.Join(srcPath,include) because this will clean away
+// a trailing "." or "/" which may be important.
+func getWalkRoot(srcPath string, include string) string {
+	return srcPath + string(filepath.Separator) + include
+}
+
+// CanonicalTarNameForPath returns platform-specific filepath
+// to canonical posix-style path for tar archival. p is relative
+// path.
+func CanonicalTarNameForPath(p string) (string, error) {
+	return p, nil // already unix-style
+}
+
+// chmodTarEntry is used to adjust the file permissions used in tar header based
+// on the platform the archival is done.
+
+func chmodTarEntry(perm os.FileMode) os.FileMode {
+	return perm // noop for unix as golang APIs provide perm bits correctly
+}
+
+func setHeaderForSpecialDevice(hdr *tar.Header, ta *tarAppender, name string, stat interface{}) (inode uint64, err error) {
+	s, ok := stat.(*syscall.Stat_t)
+
+	if !ok {
+		err = errors.New("cannot convert stat value to syscall.Stat_t")
+		return
+	}
+
+	inode = uint64(s.Ino)
+
+	// Currently go does not fill in the major/minors
+	if s.Mode&syscall.S_IFBLK != 0 ||
+		s.Mode&syscall.S_IFCHR != 0 {
+		hdr.Devmajor = int64(major(uint64(s.Rdev)))
+		hdr.Devminor = int64(minor(uint64(s.Rdev)))
+	}
+
+	return
+}
+
+func getFileUIDGID(stat interface{}) (int, int, error) {
+	s, ok := stat.(*syscall.Stat_t)
+
+	if !ok {
+		return -1, -1, errors.New("cannot convert stat value to syscall.Stat_t")
+	}
+	return int(s.Uid), int(s.Gid), nil
+}
+
+func major(device uint64) uint64 {
+	return (device >> 8) & 0xfff
+}
+
+func minor(device uint64) uint64 {
+	return (device & 0xff) | ((device >> 12) & 0xfff00)
+}
+
+// handleTarTypeBlockCharFifo is an OS-specific helper function used by
+// createTarFile to handle the following types of header: Block; Char; Fifo
+func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
+	mode := uint32(hdr.Mode & 07777)
+	switch hdr.Typeflag {
+	case tar.TypeBlock:
+		mode |= syscall.S_IFBLK
+	case tar.TypeChar:
+		mode |= syscall.S_IFCHR
+	case tar.TypeFifo:
+		mode |= syscall.S_IFIFO
+	}
+
+	if err := system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor))); err != nil {
+		return err
+	}
+	return nil
+}
+
+func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
+	if hdr.Typeflag == tar.TypeLink {
+		if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
+			if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
+				return err
+			}
+		}
+	} else if hdr.Typeflag != tar.TypeSymlink {
+		if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
+			return err
+		}
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/archive_unix_test.go

@@ -0,0 +1,60 @@
+// +build !windows
+
+package archive
+
+import (
+	"os"
+	"testing"
+)
+
+func TestCanonicalTarNameForPath(t *testing.T) {
+	cases := []struct{ in, expected string }{
+		{"foo", "foo"},
+		{"foo/bar", "foo/bar"},
+		{"foo/dir/", "foo/dir/"},
+	}
+	for _, v := range cases {
+		if out, err := CanonicalTarNameForPath(v.in); err != nil {
+			t.Fatalf("cannot get canonical name for path: %s: %v", v.in, err)
+		} else if out != v.expected {
+			t.Fatalf("wrong canonical tar name. expected:%s got:%s", v.expected, out)
+		}
+	}
+}
+
+func TestCanonicalTarName(t *testing.T) {
+	cases := []struct {
+		in       string
+		isDir    bool
+		expected string
+	}{
+		{"foo", false, "foo"},
+		{"foo", true, "foo/"},
+		{"foo/bar", false, "foo/bar"},
+		{"foo/bar", true, "foo/bar/"},
+	}
+	for _, v := range cases {
+		if out, err := canonicalTarName(v.in, v.isDir); err != nil {
+			t.Fatalf("cannot get canonical name for path: %s: %v", v.in, err)
+		} else if out != v.expected {
+			t.Fatalf("wrong canonical tar name. expected:%s got:%s", v.expected, out)
+		}
+	}
+}
+
+func TestChmodTarEntry(t *testing.T) {
+	cases := []struct {
+		in, expected os.FileMode
+	}{
+		{0000, 0000},
+		{0777, 0777},
+		{0644, 0644},
+		{0755, 0755},
+		{0444, 0444},
+	}
+	for _, v := range cases {
+		if out := chmodTarEntry(v.in); out != v.expected {
+			t.Fatalf("wrong chmod. expected:%v got:%v", v.expected, out)
+		}
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/archive_windows.go

@@ -0,0 +1,70 @@
+// +build windows
+
+package archive
+
+import (
+	"archive/tar"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/docker/docker/pkg/longpath"
+)
+
+// fixVolumePathPrefix does platform specific processing to ensure that if
+// the path being passed in is not in a volume path format, convert it to one.
+func fixVolumePathPrefix(srcPath string) string {
+	return longpath.AddPrefix(srcPath)
+}
+
+// getWalkRoot calculates the root path when performing a TarWithOptions.
+// We use a separate function as this is platform specific.
+func getWalkRoot(srcPath string, include string) string {
+	return filepath.Join(srcPath, include)
+}
+
+// CanonicalTarNameForPath returns platform-specific filepath
+// to canonical posix-style path for tar archival. p is relative
+// path.
+func CanonicalTarNameForPath(p string) (string, error) {
+	// windows: convert windows style relative path with backslashes
+	// into forward slashes. Since windows does not allow '/' or '\'
+	// in file names, it is mostly safe to replace however we must
+	// check just in case
+	if strings.Contains(p, "/") {
+		return "", fmt.Errorf("Windows path contains forward slash: %s", p)
+	}
+	return strings.Replace(p, string(os.PathSeparator), "/", -1), nil
+
+}
+
+// chmodTarEntry is used to adjust the file permissions used in tar header based
+// on the platform the archival is done.
+func chmodTarEntry(perm os.FileMode) os.FileMode {
+	perm &= 0755
+	// Add the x bit: make everything +x from windows
+	perm |= 0111
+
+	return perm
+}
+
+func setHeaderForSpecialDevice(hdr *tar.Header, ta *tarAppender, name string, stat interface{}) (inode uint64, err error) {
+	// do nothing. no notion of Rdev, Inode, Nlink in stat on Windows
+	return
+}
+
+// handleTarTypeBlockCharFifo is an OS-specific helper function used by
+// createTarFile to handle the following types of header: Block; Char; Fifo
+func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
+	return nil
+}
+
+func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
+	return nil
+}
+
+func getFileUIDGID(stat interface{}) (int, int, error) {
+	// no notion of file ownership mapping yet on Windows
+	return 0, 0, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/archive_windows_test.go

@@ -0,0 +1,87 @@
+// +build windows
+
+package archive
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestCopyFileWithInvalidDest(t *testing.T) {
+	folder, err := ioutil.TempDir("", "docker-archive-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(folder)
+	dest := "c:dest"
+	srcFolder := filepath.Join(folder, "src")
+	src := filepath.Join(folder, "src", "src")
+	err = os.MkdirAll(srcFolder, 0740)
+	if err != nil {
+		t.Fatal(err)
+	}
+	ioutil.WriteFile(src, []byte("content"), 0777)
+	err = CopyWithTar(src, dest)
+	if err == nil {
+		t.Fatalf("archiver.CopyWithTar should throw an error on invalid dest.")
+	}
+}
+
+func TestCanonicalTarNameForPath(t *testing.T) {
+	cases := []struct {
+		in, expected string
+		shouldFail   bool
+	}{
+		{"foo", "foo", false},
+		{"foo/bar", "___", true}, // unix-styled windows path must fail
+		{`foo\bar`, "foo/bar", false},
+	}
+	for _, v := range cases {
+		if out, err := CanonicalTarNameForPath(v.in); err != nil && !v.shouldFail {
+			t.Fatalf("cannot get canonical name for path: %s: %v", v.in, err)
+		} else if v.shouldFail && err == nil {
+			t.Fatalf("canonical path call should have failed with error. in=%s out=%s", v.in, out)
+		} else if !v.shouldFail && out != v.expected {
+			t.Fatalf("wrong canonical tar name. expected:%s got:%s", v.expected, out)
+		}
+	}
+}
+
+func TestCanonicalTarName(t *testing.T) {
+	cases := []struct {
+		in       string
+		isDir    bool
+		expected string
+	}{
+		{"foo", false, "foo"},
+		{"foo", true, "foo/"},
+		{`foo\bar`, false, "foo/bar"},
+		{`foo\bar`, true, "foo/bar/"},
+	}
+	for _, v := range cases {
+		if out, err := canonicalTarName(v.in, v.isDir); err != nil {
+			t.Fatalf("cannot get canonical name for path: %s: %v", v.in, err)
+		} else if out != v.expected {
+			t.Fatalf("wrong canonical tar name. expected:%s got:%s", v.expected, out)
+		}
+	}
+}
+
+func TestChmodTarEntry(t *testing.T) {
+	cases := []struct {
+		in, expected os.FileMode
+	}{
+		{0000, 0111},
+		{0777, 0755},
+		{0644, 0755},
+		{0755, 0755},
+		{0444, 0555},
+	}
+	for _, v := range cases {
+		if out := chmodTarEntry(v.in); out != v.expected {
+			t.Fatalf("wrong chmod. expected:%v got:%v", v.expected, out)
+		}
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/changes.go

@@ -0,0 +1,416 @@
+package archive
+
+import (
+	"archive/tar"
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/docker/docker/pkg/idtools"
+	"github.com/docker/docker/pkg/pools"
+	"github.com/docker/docker/pkg/system"
+)
+
+// ChangeType represents the change type.
+type ChangeType int
+
+const (
+	// ChangeModify represents the modify operation.
+	ChangeModify = iota
+	// ChangeAdd represents the add operation.
+	ChangeAdd
+	// ChangeDelete represents the delete operation.
+	ChangeDelete
+)
+
+func (c ChangeType) String() string {
+	switch c {
+	case ChangeModify:
+		return "C"
+	case ChangeAdd:
+		return "A"
+	case ChangeDelete:
+		return "D"
+	}
+	return ""
+}
+
+// Change represents a change, it wraps the change type and path.
+// It describes changes of the files in the path respect to the
+// parent layers. The change could be modify, add, delete.
+// This is used for layer diff.
+type Change struct {
+	Path string
+	Kind ChangeType
+}
+
+func (change *Change) String() string {
+	return fmt.Sprintf("%s %s", change.Kind, change.Path)
+}
+
+// for sort.Sort
+type changesByPath []Change
+
+func (c changesByPath) Less(i, j int) bool { return c[i].Path < c[j].Path }
+func (c changesByPath) Len() int           { return len(c) }
+func (c changesByPath) Swap(i, j int)      { c[j], c[i] = c[i], c[j] }
+
+// Gnu tar and the go tar writer don't have sub-second mtime
+// precision, which is problematic when we apply changes via tar
+// files, we handle this by comparing for exact times, *or* same
+// second count and either a or b having exactly 0 nanoseconds
+func sameFsTime(a, b time.Time) bool {
+	return a == b ||
+		(a.Unix() == b.Unix() &&
+			(a.Nanosecond() == 0 || b.Nanosecond() == 0))
+}
+
+func sameFsTimeSpec(a, b syscall.Timespec) bool {
+	return a.Sec == b.Sec &&
+		(a.Nsec == b.Nsec || a.Nsec == 0 || b.Nsec == 0)
+}
+
+// Changes walks the path rw and determines changes for the files in the path,
+// with respect to the parent layers
+func Changes(layers []string, rw string) ([]Change, error) {
+	var (
+		changes     []Change
+		changedDirs = make(map[string]struct{})
+	)
+
+	err := filepath.Walk(rw, func(path string, f os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		// Rebase path
+		path, err = filepath.Rel(rw, path)
+		if err != nil {
+			return err
+		}
+
+		// As this runs on the daemon side, file paths are OS specific.
+		path = filepath.Join(string(os.PathSeparator), path)
+
+		// Skip root
+		if path == string(os.PathSeparator) {
+			return nil
+		}
+
+		// Skip AUFS metadata
+		if matched, err := filepath.Match(string(os.PathSeparator)+WhiteoutMetaPrefix+"*", path); err != nil || matched {
+			return err
+		}
+
+		change := Change{
+			Path: path,
+		}
+
+		// Find out what kind of modification happened
+		file := filepath.Base(path)
+		// If there is a whiteout, then the file was removed
+		if strings.HasPrefix(file, WhiteoutPrefix) {
+			originalFile := file[len(WhiteoutPrefix):]
+			change.Path = filepath.Join(filepath.Dir(path), originalFile)
+			change.Kind = ChangeDelete
+		} else {
+			// Otherwise, the file was added
+			change.Kind = ChangeAdd
+
+			// ...Unless it already existed in a top layer, in which case, it's a modification
+			for _, layer := range layers {
+				stat, err := os.Stat(filepath.Join(layer, path))
+				if err != nil && !os.IsNotExist(err) {
+					return err
+				}
+				if err == nil {
+					// The file existed in the top layer, so that's a modification
+
+					// However, if it's a directory, maybe it wasn't actually modified.
+					// If you modify /foo/bar/baz, then /foo will be part of the changed files only because it's the parent of bar
+					if stat.IsDir() && f.IsDir() {
+						if f.Size() == stat.Size() && f.Mode() == stat.Mode() && sameFsTime(f.ModTime(), stat.ModTime()) {
+							// Both directories are the same, don't record the change
+							return nil
+						}
+					}
+					change.Kind = ChangeModify
+					break
+				}
+			}
+		}
+
+		// If /foo/bar/file.txt is modified, then /foo/bar must be part of the changed files.
+		// This block is here to ensure the change is recorded even if the
+		// modify time, mode and size of the parent directory in the rw and ro layers are all equal.
+		// Check https://github.com/docker/docker/pull/13590 for details.
+		if f.IsDir() {
+			changedDirs[path] = struct{}{}
+		}
+		if change.Kind == ChangeAdd || change.Kind == ChangeDelete {
+			parent := filepath.Dir(path)
+			if _, ok := changedDirs[parent]; !ok && parent != "/" {
+				changes = append(changes, Change{Path: parent, Kind: ChangeModify})
+				changedDirs[parent] = struct{}{}
+			}
+		}
+
+		// Record change
+		changes = append(changes, change)
+		return nil
+	})
+	if err != nil && !os.IsNotExist(err) {
+		return nil, err
+	}
+	return changes, nil
+}
+
+// FileInfo describes the information of a file.
+type FileInfo struct {
+	parent     *FileInfo
+	name       string
+	stat       *system.StatT
+	children   map[string]*FileInfo
+	capability []byte
+	added      bool
+}
+
+// LookUp looks up the file information of a file.
+func (info *FileInfo) LookUp(path string) *FileInfo {
+	// As this runs on the daemon side, file paths are OS specific.
+	parent := info
+	if path == string(os.PathSeparator) {
+		return info
+	}
+
+	pathElements := strings.Split(path, string(os.PathSeparator))
+	for _, elem := range pathElements {
+		if elem != "" {
+			child := parent.children[elem]
+			if child == nil {
+				return nil
+			}
+			parent = child
+		}
+	}
+	return parent
+}
+
+func (info *FileInfo) path() string {
+	if info.parent == nil {
+		// As this runs on the daemon side, file paths are OS specific.
+		return string(os.PathSeparator)
+	}
+	return filepath.Join(info.parent.path(), info.name)
+}
+
+func (info *FileInfo) addChanges(oldInfo *FileInfo, changes *[]Change) {
+
+	sizeAtEntry := len(*changes)
+
+	if oldInfo == nil {
+		// add
+		change := Change{
+			Path: info.path(),
+			Kind: ChangeAdd,
+		}
+		*changes = append(*changes, change)
+		info.added = true
+	}
+
+	// We make a copy so we can modify it to detect additions
+	// also, we only recurse on the old dir if the new info is a directory
+	// otherwise any previous delete/change is considered recursive
+	oldChildren := make(map[string]*FileInfo)
+	if oldInfo != nil && info.isDir() {
+		for k, v := range oldInfo.children {
+			oldChildren[k] = v
+		}
+	}
+
+	for name, newChild := range info.children {
+		oldChild, _ := oldChildren[name]
+		if oldChild != nil {
+			// change?
+			oldStat := oldChild.stat
+			newStat := newChild.stat
+			// Note: We can't compare inode or ctime or blocksize here, because these change
+			// when copying a file into a container. However, that is not generally a problem
+			// because any content change will change mtime, and any status change should
+			// be visible when actually comparing the stat fields. The only time this
+			// breaks down is if some code intentionally hides a change by setting
+			// back mtime
+			if statDifferent(oldStat, newStat) ||
+				bytes.Compare(oldChild.capability, newChild.capability) != 0 {
+				change := Change{
+					Path: newChild.path(),
+					Kind: ChangeModify,
+				}
+				*changes = append(*changes, change)
+				newChild.added = true
+			}
+
+			// Remove from copy so we can detect deletions
+			delete(oldChildren, name)
+		}
+
+		newChild.addChanges(oldChild, changes)
+	}
+	for _, oldChild := range oldChildren {
+		// delete
+		change := Change{
+			Path: oldChild.path(),
+			Kind: ChangeDelete,
+		}
+		*changes = append(*changes, change)
+	}
+
+	// If there were changes inside this directory, we need to add it, even if the directory
+	// itself wasn't changed. This is needed to properly save and restore filesystem permissions.
+	// As this runs on the daemon side, file paths are OS specific.
+	if len(*changes) > sizeAtEntry && info.isDir() && !info.added && info.path() != string(os.PathSeparator) {
+		change := Change{
+			Path: info.path(),
+			Kind: ChangeModify,
+		}
+		// Let's insert the directory entry before the recently added entries located inside this dir
+		*changes = append(*changes, change) // just to resize the slice, will be overwritten
+		copy((*changes)[sizeAtEntry+1:], (*changes)[sizeAtEntry:])
+		(*changes)[sizeAtEntry] = change
+	}
+
+}
+
+// Changes add changes to file information.
+func (info *FileInfo) Changes(oldInfo *FileInfo) []Change {
+	var changes []Change
+
+	info.addChanges(oldInfo, &changes)
+
+	return changes
+}
+
+func newRootFileInfo() *FileInfo {
+	// As this runs on the daemon side, file paths are OS specific.
+	root := &FileInfo{
+		name:     string(os.PathSeparator),
+		children: make(map[string]*FileInfo),
+	}
+	return root
+}
+
+// ChangesDirs compares two directories and generates an array of Change objects describing the changes.
+// If oldDir is "", then all files in newDir will be Add-Changes.
+func ChangesDirs(newDir, oldDir string) ([]Change, error) {
+	var (
+		oldRoot, newRoot *FileInfo
+	)
+	if oldDir == "" {
+		emptyDir, err := ioutil.TempDir("", "empty")
+		if err != nil {
+			return nil, err
+		}
+		defer os.Remove(emptyDir)
+		oldDir = emptyDir
+	}
+	oldRoot, newRoot, err := collectFileInfoForChanges(oldDir, newDir)
+	if err != nil {
+		return nil, err
+	}
+
+	return newRoot.Changes(oldRoot), nil
+}
+
+// ChangesSize calculates the size in bytes of the provided changes, based on newDir.
+func ChangesSize(newDir string, changes []Change) int64 {
+	var (
+		size int64
+		sf   = make(map[uint64]struct{})
+	)
+	for _, change := range changes {
+		if change.Kind == ChangeModify || change.Kind == ChangeAdd {
+			file := filepath.Join(newDir, change.Path)
+			fileInfo, err := os.Lstat(file)
+			if err != nil {
+				logrus.Errorf("Can not stat %q: %s", file, err)
+				continue
+			}
+
+			if fileInfo != nil && !fileInfo.IsDir() {
+				if hasHardlinks(fileInfo) {
+					inode := getIno(fileInfo)
+					if _, ok := sf[inode]; !ok {
+						size += fileInfo.Size()
+						sf[inode] = struct{}{}
+					}
+				} else {
+					size += fileInfo.Size()
+				}
+			}
+		}
+	}
+	return size
+}
+
+// ExportChanges produces an Archive from the provided changes, relative to dir.
+func ExportChanges(dir string, changes []Change, uidMaps, gidMaps []idtools.IDMap) (Archive, error) {
+	reader, writer := io.Pipe()
+	go func() {
+		ta := &tarAppender{
+			TarWriter: tar.NewWriter(writer),
+			Buffer:    pools.BufioWriter32KPool.Get(nil),
+			SeenFiles: make(map[uint64]string),
+			UIDMaps:   uidMaps,
+			GIDMaps:   gidMaps,
+		}
+		// this buffer is needed for the duration of this piped stream
+		defer pools.BufioWriter32KPool.Put(ta.Buffer)
+
+		sort.Sort(changesByPath(changes))
+
+		// In general we log errors here but ignore them because
+		// during e.g. a diff operation the container can continue
+		// mutating the filesystem and we can see transient errors
+		// from this
+		for _, change := range changes {
+			if change.Kind == ChangeDelete {
+				whiteOutDir := filepath.Dir(change.Path)
+				whiteOutBase := filepath.Base(change.Path)
+				whiteOut := filepath.Join(whiteOutDir, WhiteoutPrefix+whiteOutBase)
+				timestamp := time.Now()
+				hdr := &tar.Header{
+					Name:       whiteOut[1:],
+					Size:       0,
+					ModTime:    timestamp,
+					AccessTime: timestamp,
+					ChangeTime: timestamp,
+				}
+				if err := ta.TarWriter.WriteHeader(hdr); err != nil {
+					logrus.Debugf("Can't write whiteout header: %s", err)
+				}
+			} else {
+				path := filepath.Join(dir, change.Path)
+				if err := ta.addTarFile(path, change.Path[1:]); err != nil {
+					logrus.Debugf("Can't add file %s to tar: %s", path, err)
+				}
+			}
+		}
+
+		// Make sure to check the error on Close.
+		if err := ta.TarWriter.Close(); err != nil {
+			logrus.Debugf("Can't close layer: %s", err)
+		}
+		if err := writer.Close(); err != nil {
+			logrus.Debugf("failed close Changes writer: %s", err)
+		}
+	}()
+	return reader, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/changes_linux.go

@@ -0,0 +1,285 @@
+package archive
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sort"
+	"syscall"
+	"unsafe"
+
+	"github.com/docker/docker/pkg/system"
+)
+
+// walker is used to implement collectFileInfoForChanges on linux. Where this
+// method in general returns the entire contents of two directory trees, we
+// optimize some FS calls out on linux. In particular, we take advantage of the
+// fact that getdents(2) returns the inode of each file in the directory being
+// walked, which, when walking two trees in parallel to generate a list of
+// changes, can be used to prune subtrees without ever having to lstat(2) them
+// directly. Eliminating stat calls in this way can save up to seconds on large
+// images.
+type walker struct {
+	dir1  string
+	dir2  string
+	root1 *FileInfo
+	root2 *FileInfo
+}
+
+// collectFileInfoForChanges returns a complete representation of the trees
+// rooted at dir1 and dir2, with one important exception: any subtree or
+// leaf where the inode and device numbers are an exact match between dir1
+// and dir2 will be pruned from the results. This method is *only* to be used
+// to generating a list of changes between the two directories, as it does not
+// reflect the full contents.
+func collectFileInfoForChanges(dir1, dir2 string) (*FileInfo, *FileInfo, error) {
+	w := &walker{
+		dir1:  dir1,
+		dir2:  dir2,
+		root1: newRootFileInfo(),
+		root2: newRootFileInfo(),
+	}
+
+	i1, err := os.Lstat(w.dir1)
+	if err != nil {
+		return nil, nil, err
+	}
+	i2, err := os.Lstat(w.dir2)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if err := w.walk("/", i1, i2); err != nil {
+		return nil, nil, err
+	}
+
+	return w.root1, w.root2, nil
+}
+
+// Given a FileInfo, its path info, and a reference to the root of the tree
+// being constructed, register this file with the tree.
+func walkchunk(path string, fi os.FileInfo, dir string, root *FileInfo) error {
+	if fi == nil {
+		return nil
+	}
+	parent := root.LookUp(filepath.Dir(path))
+	if parent == nil {
+		return fmt.Errorf("collectFileInfoForChanges: Unexpectedly no parent for %s", path)
+	}
+	info := &FileInfo{
+		name:     filepath.Base(path),
+		children: make(map[string]*FileInfo),
+		parent:   parent,
+	}
+	cpath := filepath.Join(dir, path)
+	stat, err := system.FromStatT(fi.Sys().(*syscall.Stat_t))
+	if err != nil {
+		return err
+	}
+	info.stat = stat
+	info.capability, _ = system.Lgetxattr(cpath, "security.capability") // lgetxattr(2): fs access
+	parent.children[info.name] = info
+	return nil
+}
+
+// Walk a subtree rooted at the same path in both trees being iterated. For
+// example, /docker/overlay/1234/a/b/c/d and /docker/overlay/8888/a/b/c/d
+func (w *walker) walk(path string, i1, i2 os.FileInfo) (err error) {
+	// Register these nodes with the return trees, unless we're still at the
+	// (already-created) roots:
+	if path != "/" {
+		if err := walkchunk(path, i1, w.dir1, w.root1); err != nil {
+			return err
+		}
+		if err := walkchunk(path, i2, w.dir2, w.root2); err != nil {
+			return err
+		}
+	}
+
+	is1Dir := i1 != nil && i1.IsDir()
+	is2Dir := i2 != nil && i2.IsDir()
+
+	sameDevice := false
+	if i1 != nil && i2 != nil {
+		si1 := i1.Sys().(*syscall.Stat_t)
+		si2 := i2.Sys().(*syscall.Stat_t)
+		if si1.Dev == si2.Dev {
+			sameDevice = true
+		}
+	}
+
+	// If these files are both non-existent, or leaves (non-dirs), we are done.
+	if !is1Dir && !is2Dir {
+		return nil
+	}
+
+	// Fetch the names of all the files contained in both directories being walked:
+	var names1, names2 []nameIno
+	if is1Dir {
+		names1, err = readdirnames(filepath.Join(w.dir1, path)) // getdents(2): fs access
+		if err != nil {
+			return err
+		}
+	}
+	if is2Dir {
+		names2, err = readdirnames(filepath.Join(w.dir2, path)) // getdents(2): fs access
+		if err != nil {
+			return err
+		}
+	}
+
+	// We have lists of the files contained in both parallel directories, sorted
+	// in the same order. Walk them in parallel, generating a unique merged list
+	// of all items present in either or both directories.
+	var names []string
+	ix1 := 0
+	ix2 := 0
+
+	for {
+		if ix1 >= len(names1) {
+			break
+		}
+		if ix2 >= len(names2) {
+			break
+		}
+
+		ni1 := names1[ix1]
+		ni2 := names2[ix2]
+
+		switch bytes.Compare([]byte(ni1.name), []byte(ni2.name)) {
+		case -1: // ni1 < ni2 -- advance ni1
+			// we will not encounter ni1 in names2
+			names = append(names, ni1.name)
+			ix1++
+		case 0: // ni1 == ni2
+			if ni1.ino != ni2.ino || !sameDevice {
+				names = append(names, ni1.name)
+			}
+			ix1++
+			ix2++
+		case 1: // ni1 > ni2 -- advance ni2
+			// we will not encounter ni2 in names1
+			names = append(names, ni2.name)
+			ix2++
+		}
+	}
+	for ix1 < len(names1) {
+		names = append(names, names1[ix1].name)
+		ix1++
+	}
+	for ix2 < len(names2) {
+		names = append(names, names2[ix2].name)
+		ix2++
+	}
+
+	// For each of the names present in either or both of the directories being
+	// iterated, stat the name under each root, and recurse the pair of them:
+	for _, name := range names {
+		fname := filepath.Join(path, name)
+		var cInfo1, cInfo2 os.FileInfo
+		if is1Dir {
+			cInfo1, err = os.Lstat(filepath.Join(w.dir1, fname)) // lstat(2): fs access
+			if err != nil && !os.IsNotExist(err) {
+				return err
+			}
+		}
+		if is2Dir {
+			cInfo2, err = os.Lstat(filepath.Join(w.dir2, fname)) // lstat(2): fs access
+			if err != nil && !os.IsNotExist(err) {
+				return err
+			}
+		}
+		if err = w.walk(fname, cInfo1, cInfo2); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// {name,inode} pairs used to support the early-pruning logic of the walker type
+type nameIno struct {
+	name string
+	ino  uint64
+}
+
+type nameInoSlice []nameIno
+
+func (s nameInoSlice) Len() int           { return len(s) }
+func (s nameInoSlice) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s nameInoSlice) Less(i, j int) bool { return s[i].name < s[j].name }
+
+// readdirnames is a hacked-apart version of the Go stdlib code, exposing inode
+// numbers further up the stack when reading directory contents. Unlike
+// os.Readdirnames, which returns a list of filenames, this function returns a
+// list of {filename,inode} pairs.
+func readdirnames(dirname string) (names []nameIno, err error) {
+	var (
+		size = 100
+		buf  = make([]byte, 4096)
+		nbuf int
+		bufp int
+		nb   int
+	)
+
+	f, err := os.Open(dirname)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	names = make([]nameIno, 0, size) // Empty with room to grow.
+	for {
+		// Refill the buffer if necessary
+		if bufp >= nbuf {
+			bufp = 0
+			nbuf, err = syscall.ReadDirent(int(f.Fd()), buf) // getdents on linux
+			if nbuf < 0 {
+				nbuf = 0
+			}
+			if err != nil {
+				return nil, os.NewSyscallError("readdirent", err)
+			}
+			if nbuf <= 0 {
+				break // EOF
+			}
+		}
+
+		// Drain the buffer
+		nb, names = parseDirent(buf[bufp:nbuf], names)
+		bufp += nb
+	}
+
+	sl := nameInoSlice(names)
+	sort.Sort(sl)
+	return sl, nil
+}
+
+// parseDirent is a minor modification of syscall.ParseDirent (linux version)
+// which returns {name,inode} pairs instead of just names.
+func parseDirent(buf []byte, names []nameIno) (consumed int, newnames []nameIno) {
+	origlen := len(buf)
+	for len(buf) > 0 {
+		dirent := (*syscall.Dirent)(unsafe.Pointer(&buf[0]))
+		buf = buf[dirent.Reclen:]
+		if dirent.Ino == 0 { // File absent in directory.
+			continue
+		}
+		bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0]))
+		var name = string(bytes[0:clen(bytes[:])])
+		if name == "." || name == ".." { // Useless names
+			continue
+		}
+		names = append(names, nameIno{name, dirent.Ino})
+	}
+	return origlen - len(buf), names
+}
+
+func clen(n []byte) int {
+	for i := 0; i < len(n); i++ {
+		if n[i] == 0 {
+			return i
+		}
+	}
+	return len(n)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/changes_other.go

@@ -0,0 +1,97 @@
+// +build !linux
+
+package archive
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/docker/docker/pkg/system"
+)
+
+func collectFileInfoForChanges(oldDir, newDir string) (*FileInfo, *FileInfo, error) {
+	var (
+		oldRoot, newRoot *FileInfo
+		err1, err2       error
+		errs             = make(chan error, 2)
+	)
+	go func() {
+		oldRoot, err1 = collectFileInfo(oldDir)
+		errs <- err1
+	}()
+	go func() {
+		newRoot, err2 = collectFileInfo(newDir)
+		errs <- err2
+	}()
+
+	// block until both routines have returned
+	for i := 0; i < 2; i++ {
+		if err := <-errs; err != nil {
+			return nil, nil, err
+		}
+	}
+
+	return oldRoot, newRoot, nil
+}
+
+func collectFileInfo(sourceDir string) (*FileInfo, error) {
+	root := newRootFileInfo()
+
+	err := filepath.Walk(sourceDir, func(path string, f os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		// Rebase path
+		relPath, err := filepath.Rel(sourceDir, path)
+		if err != nil {
+			return err
+		}
+
+		// As this runs on the daemon side, file paths are OS specific.
+		relPath = filepath.Join(string(os.PathSeparator), relPath)
+
+		// See https://github.com/golang/go/issues/9168 - bug in filepath.Join.
+		// Temporary workaround. If the returned path starts with two backslashes,
+		// trim it down to a single backslash. Only relevant on Windows.
+		if runtime.GOOS == "windows" {
+			if strings.HasPrefix(relPath, `\\`) {
+				relPath = relPath[1:]
+			}
+		}
+
+		if relPath == string(os.PathSeparator) {
+			return nil
+		}
+
+		parent := root.LookUp(filepath.Dir(relPath))
+		if parent == nil {
+			return fmt.Errorf("collectFileInfo: Unexpectedly no parent for %s", relPath)
+		}
+
+		info := &FileInfo{
+			name:     filepath.Base(relPath),
+			children: make(map[string]*FileInfo),
+			parent:   parent,
+		}
+
+		s, err := system.Lstat(path)
+		if err != nil {
+			return err
+		}
+		info.stat = s
+
+		info.capability, _ = system.Lgetxattr(path, "security.capability")
+
+		parent.children[info.name] = info
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return root, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/changes_posix_test.go

@@ -0,0 +1,127 @@
+package archive
+
+import (
+	"archive/tar"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path"
+	"sort"
+	"testing"
+)
+
+func TestHardLinkOrder(t *testing.T) {
+	names := []string{"file1.txt", "file2.txt", "file3.txt"}
+	msg := []byte("Hey y'all")
+
+	// Create dir
+	src, err := ioutil.TempDir("", "docker-hardlink-test-src-")
+	if err != nil {
+		t.Fatal(err)
+	}
+	//defer os.RemoveAll(src)
+	for _, name := range names {
+		func() {
+			fh, err := os.Create(path.Join(src, name))
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer fh.Close()
+			if _, err = fh.Write(msg); err != nil {
+				t.Fatal(err)
+			}
+		}()
+	}
+	// Create dest, with changes that includes hardlinks
+	dest, err := ioutil.TempDir("", "docker-hardlink-test-dest-")
+	if err != nil {
+		t.Fatal(err)
+	}
+	os.RemoveAll(dest) // we just want the name, at first
+	if err := copyDir(src, dest); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dest)
+	for _, name := range names {
+		for i := 0; i < 5; i++ {
+			if err := os.Link(path.Join(dest, name), path.Join(dest, fmt.Sprintf("%s.link%d", name, i))); err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+
+	// get changes
+	changes, err := ChangesDirs(dest, src)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// sort
+	sort.Sort(changesByPath(changes))
+
+	// ExportChanges
+	ar, err := ExportChanges(dest, changes, nil, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	hdrs, err := walkHeaders(ar)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// reverse sort
+	sort.Sort(sort.Reverse(changesByPath(changes)))
+	// ExportChanges
+	arRev, err := ExportChanges(dest, changes, nil, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	hdrsRev, err := walkHeaders(arRev)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// line up the two sets
+	sort.Sort(tarHeaders(hdrs))
+	sort.Sort(tarHeaders(hdrsRev))
+
+	// compare Size and LinkName
+	for i := range hdrs {
+		if hdrs[i].Name != hdrsRev[i].Name {
+			t.Errorf("headers - expected name %q; but got %q", hdrs[i].Name, hdrsRev[i].Name)
+		}
+		if hdrs[i].Size != hdrsRev[i].Size {
+			t.Errorf("headers - %q expected size %d; but got %d", hdrs[i].Name, hdrs[i].Size, hdrsRev[i].Size)
+		}
+		if hdrs[i].Typeflag != hdrsRev[i].Typeflag {
+			t.Errorf("headers - %q expected type %d; but got %d", hdrs[i].Name, hdrs[i].Typeflag, hdrsRev[i].Typeflag)
+		}
+		if hdrs[i].Linkname != hdrsRev[i].Linkname {
+			t.Errorf("headers - %q expected linkname %q; but got %q", hdrs[i].Name, hdrs[i].Linkname, hdrsRev[i].Linkname)
+		}
+	}
+
+}
+
+type tarHeaders []tar.Header
+
+func (th tarHeaders) Len() int           { return len(th) }
+func (th tarHeaders) Swap(i, j int)      { th[j], th[i] = th[i], th[j] }
+func (th tarHeaders) Less(i, j int) bool { return th[i].Name < th[j].Name }
+
+func walkHeaders(r io.Reader) ([]tar.Header, error) {
+	t := tar.NewReader(r)
+	headers := []tar.Header{}
+	for {
+		hdr, err := t.Next()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return headers, err
+		}
+		headers = append(headers, *hdr)
+	}
+	return headers, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/changes_test.go

@@ -0,0 +1,527 @@
+package archive
+
+import (
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path"
+	"sort"
+	"testing"
+	"time"
+)
+
+func max(x, y int) int {
+	if x >= y {
+		return x
+	}
+	return y
+}
+
+func copyDir(src, dst string) error {
+	cmd := exec.Command("cp", "-a", src, dst)
+	if err := cmd.Run(); err != nil {
+		return err
+	}
+	return nil
+}
+
+type FileType uint32
+
+const (
+	Regular FileType = iota
+	Dir
+	Symlink
+)
+
+type FileData struct {
+	filetype    FileType
+	path        string
+	contents    string
+	permissions os.FileMode
+}
+
+func createSampleDir(t *testing.T, root string) {
+	files := []FileData{
+		{Regular, "file1", "file1\n", 0600},
+		{Regular, "file2", "file2\n", 0666},
+		{Regular, "file3", "file3\n", 0404},
+		{Regular, "file4", "file4\n", 0600},
+		{Regular, "file5", "file5\n", 0600},
+		{Regular, "file6", "file6\n", 0600},
+		{Regular, "file7", "file7\n", 0600},
+		{Dir, "dir1", "", 0740},
+		{Regular, "dir1/file1-1", "file1-1\n", 01444},
+		{Regular, "dir1/file1-2", "file1-2\n", 0666},
+		{Dir, "dir2", "", 0700},
+		{Regular, "dir2/file2-1", "file2-1\n", 0666},
+		{Regular, "dir2/file2-2", "file2-2\n", 0666},
+		{Dir, "dir3", "", 0700},
+		{Regular, "dir3/file3-1", "file3-1\n", 0666},
+		{Regular, "dir3/file3-2", "file3-2\n", 0666},
+		{Dir, "dir4", "", 0700},
+		{Regular, "dir4/file3-1", "file4-1\n", 0666},
+		{Regular, "dir4/file3-2", "file4-2\n", 0666},
+		{Symlink, "symlink1", "target1", 0666},
+		{Symlink, "symlink2", "target2", 0666},
+		{Symlink, "symlink3", root + "/file1", 0666},
+		{Symlink, "symlink4", root + "/symlink3", 0666},
+		{Symlink, "dirSymlink", root + "/dir1", 0740},
+	}
+
+	now := time.Now()
+	for _, info := range files {
+		p := path.Join(root, info.path)
+		if info.filetype == Dir {
+			if err := os.MkdirAll(p, info.permissions); err != nil {
+				t.Fatal(err)
+			}
+		} else if info.filetype == Regular {
+			if err := ioutil.WriteFile(p, []byte(info.contents), info.permissions); err != nil {
+				t.Fatal(err)
+			}
+		} else if info.filetype == Symlink {
+			if err := os.Symlink(info.contents, p); err != nil {
+				t.Fatal(err)
+			}
+		}
+
+		if info.filetype != Symlink {
+			// Set a consistent ctime, atime for all files and dirs
+			if err := os.Chtimes(p, now, now); err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+}
+
+func TestChangeString(t *testing.T) {
+	modifiyChange := Change{"change", ChangeModify}
+	toString := modifiyChange.String()
+	if toString != "C change" {
+		t.Fatalf("String() of a change with ChangeModifiy Kind should have been %s but was %s", "C change", toString)
+	}
+	addChange := Change{"change", ChangeAdd}
+	toString = addChange.String()
+	if toString != "A change" {
+		t.Fatalf("String() of a change with ChangeAdd Kind should have been %s but was %s", "A change", toString)
+	}
+	deleteChange := Change{"change", ChangeDelete}
+	toString = deleteChange.String()
+	if toString != "D change" {
+		t.Fatalf("String() of a change with ChangeDelete Kind should have been %s but was %s", "D change", toString)
+	}
+}
+
+func TestChangesWithNoChanges(t *testing.T) {
+	rwLayer, err := ioutil.TempDir("", "docker-changes-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(rwLayer)
+	layer, err := ioutil.TempDir("", "docker-changes-test-layer")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(layer)
+	createSampleDir(t, layer)
+	changes, err := Changes([]string{layer}, rwLayer)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(changes) != 0 {
+		t.Fatalf("Changes with no difference should have detect no changes, but detected %d", len(changes))
+	}
+}
+
+func TestChangesWithChanges(t *testing.T) {
+	// Mock the readonly layer
+	layer, err := ioutil.TempDir("", "docker-changes-test-layer")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(layer)
+	createSampleDir(t, layer)
+	os.MkdirAll(path.Join(layer, "dir1/subfolder"), 0740)
+
+	// Mock the RW layer
+	rwLayer, err := ioutil.TempDir("", "docker-changes-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(rwLayer)
+
+	// Create a folder in RW layer
+	dir1 := path.Join(rwLayer, "dir1")
+	os.MkdirAll(dir1, 0740)
+	deletedFile := path.Join(dir1, ".wh.file1-2")
+	ioutil.WriteFile(deletedFile, []byte{}, 0600)
+	modifiedFile := path.Join(dir1, "file1-1")
+	ioutil.WriteFile(modifiedFile, []byte{0x00}, 01444)
+	// Let's add a subfolder for a newFile
+	subfolder := path.Join(dir1, "subfolder")
+	os.MkdirAll(subfolder, 0740)
+	newFile := path.Join(subfolder, "newFile")
+	ioutil.WriteFile(newFile, []byte{}, 0740)
+
+	changes, err := Changes([]string{layer}, rwLayer)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedChanges := []Change{
+		{"/dir1", ChangeModify},
+		{"/dir1/file1-1", ChangeModify},
+		{"/dir1/file1-2", ChangeDelete},
+		{"/dir1/subfolder", ChangeModify},
+		{"/dir1/subfolder/newFile", ChangeAdd},
+	}
+	checkChanges(expectedChanges, changes, t)
+}
+
+// See https://github.com/docker/docker/pull/13590
+func TestChangesWithChangesGH13590(t *testing.T) {
+	baseLayer, err := ioutil.TempDir("", "docker-changes-test.")
+	defer os.RemoveAll(baseLayer)
+
+	dir3 := path.Join(baseLayer, "dir1/dir2/dir3")
+	os.MkdirAll(dir3, 07400)
+
+	file := path.Join(dir3, "file.txt")
+	ioutil.WriteFile(file, []byte("hello"), 0666)
+
+	layer, err := ioutil.TempDir("", "docker-changes-test2.")
+	defer os.RemoveAll(layer)
+
+	// Test creating a new file
+	if err := copyDir(baseLayer+"/dir1", layer+"/"); err != nil {
+		t.Fatalf("Cmd failed: %q", err)
+	}
+
+	os.Remove(path.Join(layer, "dir1/dir2/dir3/file.txt"))
+	file = path.Join(layer, "dir1/dir2/dir3/file1.txt")
+	ioutil.WriteFile(file, []byte("bye"), 0666)
+
+	changes, err := Changes([]string{baseLayer}, layer)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedChanges := []Change{
+		{"/dir1/dir2/dir3", ChangeModify},
+		{"/dir1/dir2/dir3/file1.txt", ChangeAdd},
+	}
+	checkChanges(expectedChanges, changes, t)
+
+	// Now test changing a file
+	layer, err = ioutil.TempDir("", "docker-changes-test3.")
+	defer os.RemoveAll(layer)
+
+	if err := copyDir(baseLayer+"/dir1", layer+"/"); err != nil {
+		t.Fatalf("Cmd failed: %q", err)
+	}
+
+	file = path.Join(layer, "dir1/dir2/dir3/file.txt")
+	ioutil.WriteFile(file, []byte("bye"), 0666)
+
+	changes, err = Changes([]string{baseLayer}, layer)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedChanges = []Change{
+		{"/dir1/dir2/dir3/file.txt", ChangeModify},
+	}
+	checkChanges(expectedChanges, changes, t)
+}
+
+// Create an directory, copy it, make sure we report no changes between the two
+func TestChangesDirsEmpty(t *testing.T) {
+	src, err := ioutil.TempDir("", "docker-changes-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(src)
+	createSampleDir(t, src)
+	dst := src + "-copy"
+	if err := copyDir(src, dst); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dst)
+	changes, err := ChangesDirs(dst, src)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(changes) != 0 {
+		t.Fatalf("Reported changes for identical dirs: %v", changes)
+	}
+	os.RemoveAll(src)
+	os.RemoveAll(dst)
+}
+
+func mutateSampleDir(t *testing.T, root string) {
+	// Remove a regular file
+	if err := os.RemoveAll(path.Join(root, "file1")); err != nil {
+		t.Fatal(err)
+	}
+
+	// Remove a directory
+	if err := os.RemoveAll(path.Join(root, "dir1")); err != nil {
+		t.Fatal(err)
+	}
+
+	// Remove a symlink
+	if err := os.RemoveAll(path.Join(root, "symlink1")); err != nil {
+		t.Fatal(err)
+	}
+
+	// Rewrite a file
+	if err := ioutil.WriteFile(path.Join(root, "file2"), []byte("fileNN\n"), 0777); err != nil {
+		t.Fatal(err)
+	}
+
+	// Replace a file
+	if err := os.RemoveAll(path.Join(root, "file3")); err != nil {
+		t.Fatal(err)
+	}
+	if err := ioutil.WriteFile(path.Join(root, "file3"), []byte("fileMM\n"), 0404); err != nil {
+		t.Fatal(err)
+	}
+
+	// Touch file
+	if err := os.Chtimes(path.Join(root, "file4"), time.Now().Add(time.Second), time.Now().Add(time.Second)); err != nil {
+		t.Fatal(err)
+	}
+
+	// Replace file with dir
+	if err := os.RemoveAll(path.Join(root, "file5")); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.MkdirAll(path.Join(root, "file5"), 0666); err != nil {
+		t.Fatal(err)
+	}
+
+	// Create new file
+	if err := ioutil.WriteFile(path.Join(root, "filenew"), []byte("filenew\n"), 0777); err != nil {
+		t.Fatal(err)
+	}
+
+	// Create new dir
+	if err := os.MkdirAll(path.Join(root, "dirnew"), 0766); err != nil {
+		t.Fatal(err)
+	}
+
+	// Create a new symlink
+	if err := os.Symlink("targetnew", path.Join(root, "symlinknew")); err != nil {
+		t.Fatal(err)
+	}
+
+	// Change a symlink
+	if err := os.RemoveAll(path.Join(root, "symlink2")); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink("target2change", path.Join(root, "symlink2")); err != nil {
+		t.Fatal(err)
+	}
+
+	// Replace dir with file
+	if err := os.RemoveAll(path.Join(root, "dir2")); err != nil {
+		t.Fatal(err)
+	}
+	if err := ioutil.WriteFile(path.Join(root, "dir2"), []byte("dir2\n"), 0777); err != nil {
+		t.Fatal(err)
+	}
+
+	// Touch dir
+	if err := os.Chtimes(path.Join(root, "dir3"), time.Now().Add(time.Second), time.Now().Add(time.Second)); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestChangesDirsMutated(t *testing.T) {
+	src, err := ioutil.TempDir("", "docker-changes-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	createSampleDir(t, src)
+	dst := src + "-copy"
+	if err := copyDir(src, dst); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(src)
+	defer os.RemoveAll(dst)
+
+	mutateSampleDir(t, dst)
+
+	changes, err := ChangesDirs(dst, src)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sort.Sort(changesByPath(changes))
+
+	expectedChanges := []Change{
+		{"/dir1", ChangeDelete},
+		{"/dir2", ChangeModify},
+		{"/dirnew", ChangeAdd},
+		{"/file1", ChangeDelete},
+		{"/file2", ChangeModify},
+		{"/file3", ChangeModify},
+		{"/file4", ChangeModify},
+		{"/file5", ChangeModify},
+		{"/filenew", ChangeAdd},
+		{"/symlink1", ChangeDelete},
+		{"/symlink2", ChangeModify},
+		{"/symlinknew", ChangeAdd},
+	}
+
+	for i := 0; i < max(len(changes), len(expectedChanges)); i++ {
+		if i >= len(expectedChanges) {
+			t.Fatalf("unexpected change %s\n", changes[i].String())
+		}
+		if i >= len(changes) {
+			t.Fatalf("no change for expected change %s\n", expectedChanges[i].String())
+		}
+		if changes[i].Path == expectedChanges[i].Path {
+			if changes[i] != expectedChanges[i] {
+				t.Fatalf("Wrong change for %s, expected %s, got %s\n", changes[i].Path, changes[i].String(), expectedChanges[i].String())
+			}
+		} else if changes[i].Path < expectedChanges[i].Path {
+			t.Fatalf("unexpected change %s\n", changes[i].String())
+		} else {
+			t.Fatalf("no change for expected change %s != %s\n", expectedChanges[i].String(), changes[i].String())
+		}
+	}
+}
+
+func TestApplyLayer(t *testing.T) {
+	src, err := ioutil.TempDir("", "docker-changes-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	createSampleDir(t, src)
+	defer os.RemoveAll(src)
+	dst := src + "-copy"
+	if err := copyDir(src, dst); err != nil {
+		t.Fatal(err)
+	}
+	mutateSampleDir(t, dst)
+	defer os.RemoveAll(dst)
+
+	changes, err := ChangesDirs(dst, src)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	layer, err := ExportChanges(dst, changes, nil, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	layerCopy, err := NewTempArchive(layer, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := ApplyLayer(src, layerCopy); err != nil {
+		t.Fatal(err)
+	}
+
+	changes2, err := ChangesDirs(src, dst)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(changes2) != 0 {
+		t.Fatalf("Unexpected differences after reapplying mutation: %v", changes2)
+	}
+}
+
+func TestChangesSizeWithHardlinks(t *testing.T) {
+	srcDir, err := ioutil.TempDir("", "docker-test-srcDir")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(srcDir)
+
+	destDir, err := ioutil.TempDir("", "docker-test-destDir")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(destDir)
+
+	creationSize, err := prepareUntarSourceDirectory(100, destDir, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	changes, err := ChangesDirs(destDir, srcDir)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	got := ChangesSize(destDir, changes)
+	if got != int64(creationSize) {
+		t.Errorf("Expected %d bytes of changes, got %d", creationSize, got)
+	}
+}
+
+func TestChangesSizeWithNoChanges(t *testing.T) {
+	size := ChangesSize("/tmp", nil)
+	if size != 0 {
+		t.Fatalf("ChangesSizes with no changes should be 0, was %d", size)
+	}
+}
+
+func TestChangesSizeWithOnlyDeleteChanges(t *testing.T) {
+	changes := []Change{
+		{Path: "deletedPath", Kind: ChangeDelete},
+	}
+	size := ChangesSize("/tmp", changes)
+	if size != 0 {
+		t.Fatalf("ChangesSizes with only delete changes should be 0, was %d", size)
+	}
+}
+
+func TestChangesSize(t *testing.T) {
+	parentPath, err := ioutil.TempDir("", "docker-changes-test")
+	defer os.RemoveAll(parentPath)
+	addition := path.Join(parentPath, "addition")
+	if err := ioutil.WriteFile(addition, []byte{0x01, 0x01, 0x01}, 0744); err != nil {
+		t.Fatal(err)
+	}
+	modification := path.Join(parentPath, "modification")
+	if err = ioutil.WriteFile(modification, []byte{0x01, 0x01, 0x01}, 0744); err != nil {
+		t.Fatal(err)
+	}
+	changes := []Change{
+		{Path: "addition", Kind: ChangeAdd},
+		{Path: "modification", Kind: ChangeModify},
+	}
+	size := ChangesSize(parentPath, changes)
+	if size != 6 {
+		t.Fatalf("Expected 6 bytes of changes, got %d", size)
+	}
+}
+
+func checkChanges(expectedChanges, changes []Change, t *testing.T) {
+	sort.Sort(changesByPath(expectedChanges))
+	sort.Sort(changesByPath(changes))
+	for i := 0; i < max(len(changes), len(expectedChanges)); i++ {
+		if i >= len(expectedChanges) {
+			t.Fatalf("unexpected change %s\n", changes[i].String())
+		}
+		if i >= len(changes) {
+			t.Fatalf("no change for expected change %s\n", expectedChanges[i].String())
+		}
+		if changes[i].Path == expectedChanges[i].Path {
+			if changes[i] != expectedChanges[i] {
+				t.Fatalf("Wrong change for %s, expected %s, got %s\n", changes[i].Path, changes[i].String(), expectedChanges[i].String())
+			}
+		} else if changes[i].Path < expectedChanges[i].Path {
+			t.Fatalf("unexpected change %s\n", changes[i].String())
+		} else {
+			t.Fatalf("no change for expected change %s != %s\n", expectedChanges[i].String(), changes[i].String())
+		}
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/changes_unix.go

@@ -0,0 +1,36 @@
+// +build !windows
+
+package archive
+
+import (
+	"os"
+	"syscall"
+
+	"github.com/docker/docker/pkg/system"
+)
+
+func statDifferent(oldStat *system.StatT, newStat *system.StatT) bool {
+	// Don't look at size for dirs, its not a good measure of change
+	if oldStat.Mode() != newStat.Mode() ||
+		oldStat.UID() != newStat.UID() ||
+		oldStat.GID() != newStat.GID() ||
+		oldStat.Rdev() != newStat.Rdev() ||
+		// Don't look at size for dirs, its not a good measure of change
+		(oldStat.Mode()&syscall.S_IFDIR != syscall.S_IFDIR &&
+			(!sameFsTimeSpec(oldStat.Mtim(), newStat.Mtim()) || (oldStat.Size() != newStat.Size()))) {
+		return true
+	}
+	return false
+}
+
+func (info *FileInfo) isDir() bool {
+	return info.parent == nil || info.stat.Mode()&syscall.S_IFDIR != 0
+}
+
+func getIno(fi os.FileInfo) uint64 {
+	return uint64(fi.Sys().(*syscall.Stat_t).Ino)
+}
+
+func hasHardlinks(fi os.FileInfo) bool {
+	return fi.Sys().(*syscall.Stat_t).Nlink > 1
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/changes_windows.go

@@ -0,0 +1,30 @@
+package archive
+
+import (
+	"os"
+
+	"github.com/docker/docker/pkg/system"
+)
+
+func statDifferent(oldStat *system.StatT, newStat *system.StatT) bool {
+
+	// Don't look at size for dirs, its not a good measure of change
+	if oldStat.ModTime() != newStat.ModTime() ||
+		oldStat.Mode() != newStat.Mode() ||
+		oldStat.Size() != newStat.Size() && !oldStat.IsDir() {
+		return true
+	}
+	return false
+}
+
+func (info *FileInfo) isDir() bool {
+	return info.parent == nil || info.stat.IsDir()
+}
+
+func getIno(fi os.FileInfo) (inode uint64) {
+	return
+}
+
+func hasHardlinks(fi os.FileInfo) bool {
+	return false
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/copy.go

@@ -0,0 +1,458 @@
+package archive
+
+import (
+	"archive/tar"
+	"errors"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/docker/docker/pkg/system"
+)
+
+// Errors used or returned by this file.
+var (
+	ErrNotDirectory      = errors.New("not a directory")
+	ErrDirNotExists      = errors.New("no such directory")
+	ErrCannotCopyDir     = errors.New("cannot copy directory")
+	ErrInvalidCopySource = errors.New("invalid copy source content")
+)
+
+// PreserveTrailingDotOrSeparator returns the given cleaned path (after
+// processing using any utility functions from the path or filepath stdlib
+// packages) and appends a trailing `/.` or `/` if its corresponding  original
+// path (from before being processed by utility functions from the path or
+// filepath stdlib packages) ends with a trailing `/.` or `/`. If the cleaned
+// path already ends in a `.` path segment, then another is not added. If the
+// clean path already ends in a path separator, then another is not added.
+func PreserveTrailingDotOrSeparator(cleanedPath, originalPath string) string {
+	// Ensure paths are in platform semantics
+	cleanedPath = normalizePath(cleanedPath)
+	originalPath = normalizePath(originalPath)
+
+	if !specifiesCurrentDir(cleanedPath) && specifiesCurrentDir(originalPath) {
+		if !hasTrailingPathSeparator(cleanedPath) {
+			// Add a separator if it doesn't already end with one (a cleaned
+			// path would only end in a separator if it is the root).
+			cleanedPath += string(filepath.Separator)
+		}
+		cleanedPath += "."
+	}
+
+	if !hasTrailingPathSeparator(cleanedPath) && hasTrailingPathSeparator(originalPath) {
+		cleanedPath += string(filepath.Separator)
+	}
+
+	return cleanedPath
+}
+
+// assertsDirectory returns whether the given path is
+// asserted to be a directory, i.e., the path ends with
+// a trailing '/' or `/.`, assuming a path separator of `/`.
+func assertsDirectory(path string) bool {
+	return hasTrailingPathSeparator(path) || specifiesCurrentDir(path)
+}
+
+// hasTrailingPathSeparator returns whether the given
+// path ends with the system's path separator character.
+func hasTrailingPathSeparator(path string) bool {
+	return len(path) > 0 && os.IsPathSeparator(path[len(path)-1])
+}
+
+// specifiesCurrentDir returns whether the given path specifies
+// a "current directory", i.e., the last path segment is `.`.
+func specifiesCurrentDir(path string) bool {
+	return filepath.Base(path) == "."
+}
+
+// SplitPathDirEntry splits the given path between its directory name and its
+// basename by first cleaning the path but preserves a trailing "." if the
+// original path specified the current directory.
+func SplitPathDirEntry(path string) (dir, base string) {
+	cleanedPath := filepath.Clean(normalizePath(path))
+
+	if specifiesCurrentDir(path) {
+		cleanedPath += string(filepath.Separator) + "."
+	}
+
+	return filepath.Dir(cleanedPath), filepath.Base(cleanedPath)
+}
+
+// TarResource archives the resource described by the given CopyInfo to a Tar
+// archive. A non-nil error is returned if sourcePath does not exist or is
+// asserted to be a directory but exists as another type of file.
+//
+// This function acts as a convenient wrapper around TarWithOptions, which
+// requires a directory as the source path. TarResource accepts either a
+// directory or a file path and correctly sets the Tar options.
+func TarResource(sourceInfo CopyInfo) (content Archive, err error) {
+	return TarResourceRebase(sourceInfo.Path, sourceInfo.RebaseName)
+}
+
+// TarResourceRebase is like TarResource but renames the first path element of
+// items in the resulting tar archive to match the given rebaseName if not "".
+func TarResourceRebase(sourcePath, rebaseName string) (content Archive, err error) {
+	sourcePath = normalizePath(sourcePath)
+	if _, err = os.Lstat(sourcePath); err != nil {
+		// Catches the case where the source does not exist or is not a
+		// directory if asserted to be a directory, as this also causes an
+		// error.
+		return
+	}
+
+	// Separate the source path between it's directory and
+	// the entry in that directory which we are archiving.
+	sourceDir, sourceBase := SplitPathDirEntry(sourcePath)
+
+	filter := []string{sourceBase}
+
+	logrus.Debugf("copying %q from %q", sourceBase, sourceDir)
+
+	return TarWithOptions(sourceDir, &TarOptions{
+		Compression:      Uncompressed,
+		IncludeFiles:     filter,
+		IncludeSourceDir: true,
+		RebaseNames: map[string]string{
+			sourceBase: rebaseName,
+		},
+	})
+}
+
+// CopyInfo holds basic info about the source
+// or destination path of a copy operation.
+type CopyInfo struct {
+	Path       string
+	Exists     bool
+	IsDir      bool
+	RebaseName string
+}
+
+// CopyInfoSourcePath stats the given path to create a CopyInfo
+// struct representing that resource for the source of an archive copy
+// operation. The given path should be an absolute local path. A source path
+// has all symlinks evaluated that appear before the last path separator ("/"
+// on Unix). As it is to be a copy source, the path must exist.
+func CopyInfoSourcePath(path string, followLink bool) (CopyInfo, error) {
+	// normalize the file path and then evaluate the symbol link
+	// we will use the target file instead of the symbol link if
+	// followLink is set
+	path = normalizePath(path)
+
+	resolvedPath, rebaseName, err := ResolveHostSourcePath(path, followLink)
+	if err != nil {
+		return CopyInfo{}, err
+	}
+
+	stat, err := os.Lstat(resolvedPath)
+	if err != nil {
+		return CopyInfo{}, err
+	}
+
+	return CopyInfo{
+		Path:       resolvedPath,
+		Exists:     true,
+		IsDir:      stat.IsDir(),
+		RebaseName: rebaseName,
+	}, nil
+}
+
+// CopyInfoDestinationPath stats the given path to create a CopyInfo
+// struct representing that resource for the destination of an archive copy
+// operation. The given path should be an absolute local path.
+func CopyInfoDestinationPath(path string) (info CopyInfo, err error) {
+	maxSymlinkIter := 10 // filepath.EvalSymlinks uses 255, but 10 already seems like a lot.
+	path = normalizePath(path)
+	originalPath := path
+
+	stat, err := os.Lstat(path)
+
+	if err == nil && stat.Mode()&os.ModeSymlink == 0 {
+		// The path exists and is not a symlink.
+		return CopyInfo{
+			Path:   path,
+			Exists: true,
+			IsDir:  stat.IsDir(),
+		}, nil
+	}
+
+	// While the path is a symlink.
+	for n := 0; err == nil && stat.Mode()&os.ModeSymlink != 0; n++ {
+		if n > maxSymlinkIter {
+			// Don't follow symlinks more than this arbitrary number of times.
+			return CopyInfo{}, errors.New("too many symlinks in " + originalPath)
+		}
+
+		// The path is a symbolic link. We need to evaluate it so that the
+		// destination of the copy operation is the link target and not the
+		// link itself. This is notably different than CopyInfoSourcePath which
+		// only evaluates symlinks before the last appearing path separator.
+		// Also note that it is okay if the last path element is a broken
+		// symlink as the copy operation should create the target.
+		var linkTarget string
+
+		linkTarget, err = os.Readlink(path)
+		if err != nil {
+			return CopyInfo{}, err
+		}
+
+		if !system.IsAbs(linkTarget) {
+			// Join with the parent directory.
+			dstParent, _ := SplitPathDirEntry(path)
+			linkTarget = filepath.Join(dstParent, linkTarget)
+		}
+
+		path = linkTarget
+		stat, err = os.Lstat(path)
+	}
+
+	if err != nil {
+		// It's okay if the destination path doesn't exist. We can still
+		// continue the copy operation if the parent directory exists.
+		if !os.IsNotExist(err) {
+			return CopyInfo{}, err
+		}
+
+		// Ensure destination parent dir exists.
+		dstParent, _ := SplitPathDirEntry(path)
+
+		parentDirStat, err := os.Lstat(dstParent)
+		if err != nil {
+			return CopyInfo{}, err
+		}
+		if !parentDirStat.IsDir() {
+			return CopyInfo{}, ErrNotDirectory
+		}
+
+		return CopyInfo{Path: path}, nil
+	}
+
+	// The path exists after resolving symlinks.
+	return CopyInfo{
+		Path:   path,
+		Exists: true,
+		IsDir:  stat.IsDir(),
+	}, nil
+}
+
+// PrepareArchiveCopy prepares the given srcContent archive, which should
+// contain the archived resource described by srcInfo, to the destination
+// described by dstInfo. Returns the possibly modified content archive along
+// with the path to the destination directory which it should be extracted to.
+func PrepareArchiveCopy(srcContent Reader, srcInfo, dstInfo CopyInfo) (dstDir string, content Archive, err error) {
+	// Ensure in platform semantics
+	srcInfo.Path = normalizePath(srcInfo.Path)
+	dstInfo.Path = normalizePath(dstInfo.Path)
+
+	// Separate the destination path between its directory and base
+	// components in case the source archive contents need to be rebased.
+	dstDir, dstBase := SplitPathDirEntry(dstInfo.Path)
+	_, srcBase := SplitPathDirEntry(srcInfo.Path)
+
+	switch {
+	case dstInfo.Exists && dstInfo.IsDir:
+		// The destination exists as a directory. No alteration
+		// to srcContent is needed as its contents can be
+		// simply extracted to the destination directory.
+		return dstInfo.Path, ioutil.NopCloser(srcContent), nil
+	case dstInfo.Exists && srcInfo.IsDir:
+		// The destination exists as some type of file and the source
+		// content is a directory. This is an error condition since
+		// you cannot copy a directory to an existing file location.
+		return "", nil, ErrCannotCopyDir
+	case dstInfo.Exists:
+		// The destination exists as some type of file and the source content
+		// is also a file. The source content entry will have to be renamed to
+		// have a basename which matches the destination path's basename.
+		if len(srcInfo.RebaseName) != 0 {
+			srcBase = srcInfo.RebaseName
+		}
+		return dstDir, RebaseArchiveEntries(srcContent, srcBase, dstBase), nil
+	case srcInfo.IsDir:
+		// The destination does not exist and the source content is an archive
+		// of a directory. The archive should be extracted to the parent of
+		// the destination path instead, and when it is, the directory that is
+		// created as a result should take the name of the destination path.
+		// The source content entries will have to be renamed to have a
+		// basename which matches the destination path's basename.
+		if len(srcInfo.RebaseName) != 0 {
+			srcBase = srcInfo.RebaseName
+		}
+		return dstDir, RebaseArchiveEntries(srcContent, srcBase, dstBase), nil
+	case assertsDirectory(dstInfo.Path):
+		// The destination does not exist and is asserted to be created as a
+		// directory, but the source content is not a directory. This is an
+		// error condition since you cannot create a directory from a file
+		// source.
+		return "", nil, ErrDirNotExists
+	default:
+		// The last remaining case is when the destination does not exist, is
+		// not asserted to be a directory, and the source content is not an
+		// archive of a directory. It this case, the destination file will need
+		// to be created when the archive is extracted and the source content
+		// entry will have to be renamed to have a basename which matches the
+		// destination path's basename.
+		if len(srcInfo.RebaseName) != 0 {
+			srcBase = srcInfo.RebaseName
+		}
+		return dstDir, RebaseArchiveEntries(srcContent, srcBase, dstBase), nil
+	}
+
+}
+
+// RebaseArchiveEntries rewrites the given srcContent archive replacing
+// an occurrence of oldBase with newBase at the beginning of entry names.
+func RebaseArchiveEntries(srcContent Reader, oldBase, newBase string) Archive {
+	if oldBase == string(os.PathSeparator) {
+		// If oldBase specifies the root directory, use an empty string as
+		// oldBase instead so that newBase doesn't replace the path separator
+		// that all paths will start with.
+		oldBase = ""
+	}
+
+	rebased, w := io.Pipe()
+
+	go func() {
+		srcTar := tar.NewReader(srcContent)
+		rebasedTar := tar.NewWriter(w)
+
+		for {
+			hdr, err := srcTar.Next()
+			if err == io.EOF {
+				// Signals end of archive.
+				rebasedTar.Close()
+				w.Close()
+				return
+			}
+			if err != nil {
+				w.CloseWithError(err)
+				return
+			}
+
+			hdr.Name = strings.Replace(hdr.Name, oldBase, newBase, 1)
+
+			if err = rebasedTar.WriteHeader(hdr); err != nil {
+				w.CloseWithError(err)
+				return
+			}
+
+			if _, err = io.Copy(rebasedTar, srcTar); err != nil {
+				w.CloseWithError(err)
+				return
+			}
+		}
+	}()
+
+	return rebased
+}
+
+// CopyResource performs an archive copy from the given source path to the
+// given destination path. The source path MUST exist and the destination
+// path's parent directory must exist.
+func CopyResource(srcPath, dstPath string, followLink bool) error {
+	var (
+		srcInfo CopyInfo
+		err     error
+	)
+
+	// Ensure in platform semantics
+	srcPath = normalizePath(srcPath)
+	dstPath = normalizePath(dstPath)
+
+	// Clean the source and destination paths.
+	srcPath = PreserveTrailingDotOrSeparator(filepath.Clean(srcPath), srcPath)
+	dstPath = PreserveTrailingDotOrSeparator(filepath.Clean(dstPath), dstPath)
+
+	if srcInfo, err = CopyInfoSourcePath(srcPath, followLink); err != nil {
+		return err
+	}
+
+	content, err := TarResource(srcInfo)
+	if err != nil {
+		return err
+	}
+	defer content.Close()
+
+	return CopyTo(content, srcInfo, dstPath)
+}
+
+// CopyTo handles extracting the given content whose
+// entries should be sourced from srcInfo to dstPath.
+func CopyTo(content Reader, srcInfo CopyInfo, dstPath string) error {
+	// The destination path need not exist, but CopyInfoDestinationPath will
+	// ensure that at least the parent directory exists.
+	dstInfo, err := CopyInfoDestinationPath(normalizePath(dstPath))
+	if err != nil {
+		return err
+	}
+
+	dstDir, copyArchive, err := PrepareArchiveCopy(content, srcInfo, dstInfo)
+	if err != nil {
+		return err
+	}
+	defer copyArchive.Close()
+
+	options := &TarOptions{
+		NoLchown:             true,
+		NoOverwriteDirNonDir: true,
+	}
+
+	return Untar(copyArchive, dstDir, options)
+}
+
+// ResolveHostSourcePath decides real path need to be copied with parameters such as
+// whether to follow symbol link or not, if followLink is true, resolvedPath will return
+// link target of any symbol link file, else it will only resolve symlink of directory
+// but return symbol link file itself without resolving.
+func ResolveHostSourcePath(path string, followLink bool) (resolvedPath, rebaseName string, err error) {
+	if followLink {
+		resolvedPath, err = filepath.EvalSymlinks(path)
+		if err != nil {
+			return
+		}
+
+		resolvedPath, rebaseName = GetRebaseName(path, resolvedPath)
+	} else {
+		dirPath, basePath := filepath.Split(path)
+
+		// if not follow symbol link, then resolve symbol link of parent dir
+		var resolvedDirPath string
+		resolvedDirPath, err = filepath.EvalSymlinks(dirPath)
+		if err != nil {
+			return
+		}
+		// resolvedDirPath will have been cleaned (no trailing path separators) so
+		// we can manually join it with the base path element.
+		resolvedPath = resolvedDirPath + string(filepath.Separator) + basePath
+		if hasTrailingPathSeparator(path) && filepath.Base(path) != filepath.Base(resolvedPath) {
+			rebaseName = filepath.Base(path)
+		}
+	}
+	return resolvedPath, rebaseName, nil
+}
+
+// GetRebaseName normalizes and compares path and resolvedPath,
+// return completed resolved path and rebased file name
+func GetRebaseName(path, resolvedPath string) (string, string) {
+	// linkTarget will have been cleaned (no trailing path separators and dot) so
+	// we can manually join it with them
+	var rebaseName string
+	if specifiesCurrentDir(path) && !specifiesCurrentDir(resolvedPath) {
+		resolvedPath += string(filepath.Separator) + "."
+	}
+
+	if hasTrailingPathSeparator(path) && !hasTrailingPathSeparator(resolvedPath) {
+		resolvedPath += string(filepath.Separator)
+	}
+
+	if filepath.Base(path) != filepath.Base(resolvedPath) {
+		// In the case where the path had a trailing separator and a symlink
+		// evaluation has changed the last path component, we will need to
+		// rebase the name in the archive that is being copied to match the
+		// originally requested name.
+		rebaseName = filepath.Base(path)
+	}
+	return resolvedPath, rebaseName
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/copy_test.go

@@ -0,0 +1,974 @@
+package archive
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func removeAllPaths(paths ...string) {
+	for _, path := range paths {
+		os.RemoveAll(path)
+	}
+}
+
+func getTestTempDirs(t *testing.T) (tmpDirA, tmpDirB string) {
+	var err error
+
+	if tmpDirA, err = ioutil.TempDir("", "archive-copy-test"); err != nil {
+		t.Fatal(err)
+	}
+
+	if tmpDirB, err = ioutil.TempDir("", "archive-copy-test"); err != nil {
+		t.Fatal(err)
+	}
+
+	return
+}
+
+func isNotDir(err error) bool {
+	return strings.Contains(err.Error(), "not a directory")
+}
+
+func joinTrailingSep(pathElements ...string) string {
+	joined := filepath.Join(pathElements...)
+
+	return fmt.Sprintf("%s%c", joined, filepath.Separator)
+}
+
+func fileContentsEqual(t *testing.T, filenameA, filenameB string) (err error) {
+	t.Logf("checking for equal file contents: %q and %q\n", filenameA, filenameB)
+
+	fileA, err := os.Open(filenameA)
+	if err != nil {
+		return
+	}
+	defer fileA.Close()
+
+	fileB, err := os.Open(filenameB)
+	if err != nil {
+		return
+	}
+	defer fileB.Close()
+
+	hasher := sha256.New()
+
+	if _, err = io.Copy(hasher, fileA); err != nil {
+		return
+	}
+
+	hashA := hasher.Sum(nil)
+	hasher.Reset()
+
+	if _, err = io.Copy(hasher, fileB); err != nil {
+		return
+	}
+
+	hashB := hasher.Sum(nil)
+
+	if !bytes.Equal(hashA, hashB) {
+		err = fmt.Errorf("file content hashes not equal - expected %s, got %s", hex.EncodeToString(hashA), hex.EncodeToString(hashB))
+	}
+
+	return
+}
+
+func dirContentsEqual(t *testing.T, newDir, oldDir string) (err error) {
+	t.Logf("checking for equal directory contents: %q and %q\n", newDir, oldDir)
+
+	var changes []Change
+
+	if changes, err = ChangesDirs(newDir, oldDir); err != nil {
+		return
+	}
+
+	if len(changes) != 0 {
+		err = fmt.Errorf("expected no changes between directories, but got: %v", changes)
+	}
+
+	return
+}
+
+func logDirContents(t *testing.T, dirPath string) {
+	logWalkedPaths := filepath.WalkFunc(func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			t.Errorf("stat error for path %q: %s", path, err)
+			return nil
+		}
+
+		if info.IsDir() {
+			path = joinTrailingSep(path)
+		}
+
+		t.Logf("\t%s", path)
+
+		return nil
+	})
+
+	t.Logf("logging directory contents: %q", dirPath)
+
+	if err := filepath.Walk(dirPath, logWalkedPaths); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func testCopyHelper(t *testing.T, srcPath, dstPath string) (err error) {
+	t.Logf("copying from %q to %q (not follow symbol link)", srcPath, dstPath)
+
+	return CopyResource(srcPath, dstPath, false)
+}
+
+func testCopyHelperFSym(t *testing.T, srcPath, dstPath string) (err error) {
+	t.Logf("copying from %q to %q (follow symbol link)", srcPath, dstPath)
+
+	return CopyResource(srcPath, dstPath, true)
+}
+
+// Basic assumptions about SRC and DST:
+// 1. SRC must exist.
+// 2. If SRC ends with a trailing separator, it must be a directory.
+// 3. DST parent directory must exist.
+// 4. If DST exists as a file, it must not end with a trailing separator.
+
+// First get these easy error cases out of the way.
+
+// Test for error when SRC does not exist.
+func TestCopyErrSrcNotExists(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	if _, err := CopyInfoSourcePath(filepath.Join(tmpDirA, "file1"), false); !os.IsNotExist(err) {
+		t.Fatalf("expected IsNotExist error, but got %T: %s", err, err)
+	}
+}
+
+// Test for error when SRC ends in a trailing
+// path separator but it exists as a file.
+func TestCopyErrSrcNotDir(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+
+	if _, err := CopyInfoSourcePath(joinTrailingSep(tmpDirA, "file1"), false); !isNotDir(err) {
+		t.Fatalf("expected IsNotDir error, but got %T: %s", err, err)
+	}
+}
+
+// Test for error when SRC is a valid file or directory,
+// but the DST parent directory does not exist.
+func TestCopyErrDstParentNotExists(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+
+	srcInfo := CopyInfo{Path: filepath.Join(tmpDirA, "file1"), Exists: true, IsDir: false}
+
+	// Try with a file source.
+	content, err := TarResource(srcInfo)
+	if err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+	defer content.Close()
+
+	// Copy to a file whose parent does not exist.
+	if err = CopyTo(content, srcInfo, filepath.Join(tmpDirB, "fakeParentDir", "file1")); err == nil {
+		t.Fatal("expected IsNotExist error, but got nil instead")
+	}
+
+	if !os.IsNotExist(err) {
+		t.Fatalf("expected IsNotExist error, but got %T: %s", err, err)
+	}
+
+	// Try with a directory source.
+	srcInfo = CopyInfo{Path: filepath.Join(tmpDirA, "dir1"), Exists: true, IsDir: true}
+
+	content, err = TarResource(srcInfo)
+	if err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+	defer content.Close()
+
+	// Copy to a directory whose parent does not exist.
+	if err = CopyTo(content, srcInfo, joinTrailingSep(tmpDirB, "fakeParentDir", "fakeDstDir")); err == nil {
+		t.Fatal("expected IsNotExist error, but got nil instead")
+	}
+
+	if !os.IsNotExist(err) {
+		t.Fatalf("expected IsNotExist error, but got %T: %s", err, err)
+	}
+}
+
+// Test for error when DST ends in a trailing
+// path separator but exists as a file.
+func TestCopyErrDstNotDir(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	// Try with a file source.
+	srcInfo := CopyInfo{Path: filepath.Join(tmpDirA, "file1"), Exists: true, IsDir: false}
+
+	content, err := TarResource(srcInfo)
+	if err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+	defer content.Close()
+
+	if err = CopyTo(content, srcInfo, joinTrailingSep(tmpDirB, "file1")); err == nil {
+		t.Fatal("expected IsNotDir error, but got nil instead")
+	}
+
+	if !isNotDir(err) {
+		t.Fatalf("expected IsNotDir error, but got %T: %s", err, err)
+	}
+
+	// Try with a directory source.
+	srcInfo = CopyInfo{Path: filepath.Join(tmpDirA, "dir1"), Exists: true, IsDir: true}
+
+	content, err = TarResource(srcInfo)
+	if err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+	defer content.Close()
+
+	if err = CopyTo(content, srcInfo, joinTrailingSep(tmpDirB, "file1")); err == nil {
+		t.Fatal("expected IsNotDir error, but got nil instead")
+	}
+
+	if !isNotDir(err) {
+		t.Fatalf("expected IsNotDir error, but got %T: %s", err, err)
+	}
+}
+
+// Possibilities are reduced to the remaining 10 cases:
+//
+//  case | srcIsDir | onlyDirContents | dstExists | dstIsDir | dstTrSep | action
+// ===================================================================================================
+//   A   |  no      |  -              |  no       |  -       |  no      |  create file
+//   B   |  no      |  -              |  no       |  -       |  yes     |  error
+//   C   |  no      |  -              |  yes      |  no      |  -       |  overwrite file
+//   D   |  no      |  -              |  yes      |  yes     |  -       |  create file in dst dir
+//   E   |  yes     |  no             |  no       |  -       |  -       |  create dir, copy contents
+//   F   |  yes     |  no             |  yes      |  no      |  -       |  error
+//   G   |  yes     |  no             |  yes      |  yes     |  -       |  copy dir and contents
+//   H   |  yes     |  yes            |  no       |  -       |  -       |  create dir, copy contents
+//   I   |  yes     |  yes            |  yes      |  no      |  -       |  error
+//   J   |  yes     |  yes            |  yes      |  yes     |  -       |  copy dir contents
+//
+
+// A. SRC specifies a file and DST (no trailing path separator) doesn't
+//    exist. This should create a file with the name DST and copy the
+//    contents of the source file into it.
+func TestCopyCaseA(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+
+	srcPath := filepath.Join(tmpDirA, "file1")
+	dstPath := filepath.Join(tmpDirB, "itWorks.txt")
+
+	var err error
+
+	if err = testCopyHelper(t, srcPath, dstPath); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, srcPath, dstPath); err != nil {
+		t.Fatal(err)
+	}
+	os.Remove(dstPath)
+
+	symlinkPath := filepath.Join(tmpDirA, "symlink3")
+	symlinkPath1 := filepath.Join(tmpDirA, "symlink4")
+	linkTarget := filepath.Join(tmpDirA, "file1")
+
+	if err = testCopyHelperFSym(t, symlinkPath, dstPath); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, linkTarget, dstPath); err != nil {
+		t.Fatal(err)
+	}
+	os.Remove(dstPath)
+	if err = testCopyHelperFSym(t, symlinkPath1, dstPath); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, linkTarget, dstPath); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// B. SRC specifies a file and DST (with trailing path separator) doesn't
+//    exist. This should cause an error because the copy operation cannot
+//    create a directory when copying a single file.
+func TestCopyCaseB(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+
+	srcPath := filepath.Join(tmpDirA, "file1")
+	dstDir := joinTrailingSep(tmpDirB, "testDir")
+
+	var err error
+
+	if err = testCopyHelper(t, srcPath, dstDir); err == nil {
+		t.Fatal("expected ErrDirNotExists error, but got nil instead")
+	}
+
+	if err != ErrDirNotExists {
+		t.Fatalf("expected ErrDirNotExists error, but got %T: %s", err, err)
+	}
+
+	symlinkPath := filepath.Join(tmpDirA, "symlink3")
+
+	if err = testCopyHelperFSym(t, symlinkPath, dstDir); err == nil {
+		t.Fatal("expected ErrDirNotExists error, but got nil instead")
+	}
+	if err != ErrDirNotExists {
+		t.Fatalf("expected ErrDirNotExists error, but got %T: %s", err, err)
+	}
+
+}
+
+// C. SRC specifies a file and DST exists as a file. This should overwrite
+//    the file at DST with the contents of the source file.
+func TestCopyCaseC(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcPath := filepath.Join(tmpDirA, "file1")
+	dstPath := filepath.Join(tmpDirB, "file2")
+
+	var err error
+
+	// Ensure they start out different.
+	if err = fileContentsEqual(t, srcPath, dstPath); err == nil {
+		t.Fatal("expected different file contents")
+	}
+
+	if err = testCopyHelper(t, srcPath, dstPath); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, srcPath, dstPath); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// C. Symbol link following version:
+//    SRC specifies a file and DST exists as a file. This should overwrite
+//    the file at DST with the contents of the source file.
+func TestCopyCaseCFSym(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	symlinkPathBad := filepath.Join(tmpDirA, "symlink1")
+	symlinkPath := filepath.Join(tmpDirA, "symlink3")
+	linkTarget := filepath.Join(tmpDirA, "file1")
+	dstPath := filepath.Join(tmpDirB, "file2")
+
+	var err error
+
+	// first to test broken link
+	if err = testCopyHelperFSym(t, symlinkPathBad, dstPath); err == nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	// test symbol link -> symbol link -> target
+	// Ensure they start out different.
+	if err = fileContentsEqual(t, linkTarget, dstPath); err == nil {
+		t.Fatal("expected different file contents")
+	}
+
+	if err = testCopyHelperFSym(t, symlinkPath, dstPath); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, linkTarget, dstPath); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// D. SRC specifies a file and DST exists as a directory. This should place
+//    a copy of the source file inside it using the basename from SRC. Ensure
+//    this works whether DST has a trailing path separator or not.
+func TestCopyCaseD(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcPath := filepath.Join(tmpDirA, "file1")
+	dstDir := filepath.Join(tmpDirB, "dir1")
+	dstPath := filepath.Join(dstDir, "file1")
+
+	var err error
+
+	// Ensure that dstPath doesn't exist.
+	if _, err = os.Stat(dstPath); !os.IsNotExist(err) {
+		t.Fatalf("did not expect dstPath %q to exist", dstPath)
+	}
+
+	if err = testCopyHelper(t, srcPath, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, srcPath, dstPath); err != nil {
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	if err = os.MkdirAll(dstDir, os.FileMode(0755)); err != nil {
+		t.Fatalf("unable to make dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "dir1")
+
+	if err = testCopyHelper(t, srcPath, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, srcPath, dstPath); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// D. Symbol link following version:
+//    SRC specifies a file and DST exists as a directory. This should place
+//    a copy of the source file inside it using the basename from SRC. Ensure
+//    this works whether DST has a trailing path separator or not.
+func TestCopyCaseDFSym(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcPath := filepath.Join(tmpDirA, "symlink4")
+	linkTarget := filepath.Join(tmpDirA, "file1")
+	dstDir := filepath.Join(tmpDirB, "dir1")
+	dstPath := filepath.Join(dstDir, "symlink4")
+
+	var err error
+
+	// Ensure that dstPath doesn't exist.
+	if _, err = os.Stat(dstPath); !os.IsNotExist(err) {
+		t.Fatalf("did not expect dstPath %q to exist", dstPath)
+	}
+
+	if err = testCopyHelperFSym(t, srcPath, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, linkTarget, dstPath); err != nil {
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	if err = os.MkdirAll(dstDir, os.FileMode(0755)); err != nil {
+		t.Fatalf("unable to make dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "dir1")
+
+	if err = testCopyHelperFSym(t, srcPath, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = fileContentsEqual(t, linkTarget, dstPath); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// E. SRC specifies a directory and DST does not exist. This should create a
+//    directory at DST and copy the contents of the SRC directory into the DST
+//    directory. Ensure this works whether DST has a trailing path separator or
+//    not.
+func TestCopyCaseE(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+
+	srcDir := filepath.Join(tmpDirA, "dir1")
+	dstDir := filepath.Join(tmpDirB, "testDir")
+
+	var err error
+
+	if err = testCopyHelper(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, srcDir); err != nil {
+		t.Log("dir contents not equal")
+		logDirContents(t, tmpDirA)
+		logDirContents(t, tmpDirB)
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "testDir")
+
+	if err = testCopyHelper(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, srcDir); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// E. Symbol link following version:
+//    SRC specifies a directory and DST does not exist. This should create a
+//    directory at DST and copy the contents of the SRC directory into the DST
+//    directory. Ensure this works whether DST has a trailing path separator or
+//    not.
+func TestCopyCaseEFSym(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+
+	srcDir := filepath.Join(tmpDirA, "dirSymlink")
+	linkTarget := filepath.Join(tmpDirA, "dir1")
+	dstDir := filepath.Join(tmpDirB, "testDir")
+
+	var err error
+
+	if err = testCopyHelperFSym(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, linkTarget); err != nil {
+		t.Log("dir contents not equal")
+		logDirContents(t, tmpDirA)
+		logDirContents(t, tmpDirB)
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "testDir")
+
+	if err = testCopyHelperFSym(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, linkTarget); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// F. SRC specifies a directory and DST exists as a file. This should cause an
+//    error as it is not possible to overwrite a file with a directory.
+func TestCopyCaseF(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcDir := filepath.Join(tmpDirA, "dir1")
+	symSrcDir := filepath.Join(tmpDirA, "dirSymlink")
+	dstFile := filepath.Join(tmpDirB, "file1")
+
+	var err error
+
+	if err = testCopyHelper(t, srcDir, dstFile); err == nil {
+		t.Fatal("expected ErrCannotCopyDir error, but got nil instead")
+	}
+
+	if err != ErrCannotCopyDir {
+		t.Fatalf("expected ErrCannotCopyDir error, but got %T: %s", err, err)
+	}
+
+	// now test with symbol link
+	if err = testCopyHelperFSym(t, symSrcDir, dstFile); err == nil {
+		t.Fatal("expected ErrCannotCopyDir error, but got nil instead")
+	}
+
+	if err != ErrCannotCopyDir {
+		t.Fatalf("expected ErrCannotCopyDir error, but got %T: %s", err, err)
+	}
+}
+
+// G. SRC specifies a directory and DST exists as a directory. This should copy
+//    the SRC directory and all its contents to the DST directory. Ensure this
+//    works whether DST has a trailing path separator or not.
+func TestCopyCaseG(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcDir := filepath.Join(tmpDirA, "dir1")
+	dstDir := filepath.Join(tmpDirB, "dir2")
+	resultDir := filepath.Join(dstDir, "dir1")
+
+	var err error
+
+	if err = testCopyHelper(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, resultDir, srcDir); err != nil {
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	if err = os.MkdirAll(dstDir, os.FileMode(0755)); err != nil {
+		t.Fatalf("unable to make dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "dir2")
+
+	if err = testCopyHelper(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, resultDir, srcDir); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// G. Symbol link version:
+//    SRC specifies a directory and DST exists as a directory. This should copy
+//    the SRC directory and all its contents to the DST directory. Ensure this
+//    works whether DST has a trailing path separator or not.
+func TestCopyCaseGFSym(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcDir := filepath.Join(tmpDirA, "dirSymlink")
+	linkTarget := filepath.Join(tmpDirA, "dir1")
+	dstDir := filepath.Join(tmpDirB, "dir2")
+	resultDir := filepath.Join(dstDir, "dirSymlink")
+
+	var err error
+
+	if err = testCopyHelperFSym(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, resultDir, linkTarget); err != nil {
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	if err = os.MkdirAll(dstDir, os.FileMode(0755)); err != nil {
+		t.Fatalf("unable to make dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "dir2")
+
+	if err = testCopyHelperFSym(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, resultDir, linkTarget); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// H. SRC specifies a directory's contents only and DST does not exist. This
+//    should create a directory at DST and copy the contents of the SRC
+//    directory (but not the directory itself) into the DST directory. Ensure
+//    this works whether DST has a trailing path separator or not.
+func TestCopyCaseH(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+
+	srcDir := joinTrailingSep(tmpDirA, "dir1") + "."
+	dstDir := filepath.Join(tmpDirB, "testDir")
+
+	var err error
+
+	if err = testCopyHelper(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, srcDir); err != nil {
+		t.Log("dir contents not equal")
+		logDirContents(t, tmpDirA)
+		logDirContents(t, tmpDirB)
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "testDir")
+
+	if err = testCopyHelper(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, srcDir); err != nil {
+		t.Log("dir contents not equal")
+		logDirContents(t, tmpDirA)
+		logDirContents(t, tmpDirB)
+		t.Fatal(err)
+	}
+}
+
+// H. Symbol link following version:
+//    SRC specifies a directory's contents only and DST does not exist. This
+//    should create a directory at DST and copy the contents of the SRC
+//    directory (but not the directory itself) into the DST directory. Ensure
+//    this works whether DST has a trailing path separator or not.
+func TestCopyCaseHFSym(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+
+	srcDir := joinTrailingSep(tmpDirA, "dirSymlink") + "."
+	linkTarget := filepath.Join(tmpDirA, "dir1")
+	dstDir := filepath.Join(tmpDirB, "testDir")
+
+	var err error
+
+	if err = testCopyHelperFSym(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, linkTarget); err != nil {
+		t.Log("dir contents not equal")
+		logDirContents(t, tmpDirA)
+		logDirContents(t, tmpDirB)
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "testDir")
+
+	if err = testCopyHelperFSym(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, linkTarget); err != nil {
+		t.Log("dir contents not equal")
+		logDirContents(t, tmpDirA)
+		logDirContents(t, tmpDirB)
+		t.Fatal(err)
+	}
+}
+
+// I. SRC specifies a directory's contents only and DST exists as a file. This
+//    should cause an error as it is not possible to overwrite a file with a
+//    directory.
+func TestCopyCaseI(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcDir := joinTrailingSep(tmpDirA, "dir1") + "."
+	symSrcDir := filepath.Join(tmpDirB, "dirSymlink")
+	dstFile := filepath.Join(tmpDirB, "file1")
+
+	var err error
+
+	if err = testCopyHelper(t, srcDir, dstFile); err == nil {
+		t.Fatal("expected ErrCannotCopyDir error, but got nil instead")
+	}
+
+	if err != ErrCannotCopyDir {
+		t.Fatalf("expected ErrCannotCopyDir error, but got %T: %s", err, err)
+	}
+
+	// now try with symbol link of dir
+	if err = testCopyHelperFSym(t, symSrcDir, dstFile); err == nil {
+		t.Fatal("expected ErrCannotCopyDir error, but got nil instead")
+	}
+
+	if err != ErrCannotCopyDir {
+		t.Fatalf("expected ErrCannotCopyDir error, but got %T: %s", err, err)
+	}
+}
+
+// J. SRC specifies a directory's contents only and DST exists as a directory.
+//    This should copy the contents of the SRC directory (but not the directory
+//    itself) into the DST directory. Ensure this works whether DST has a
+//    trailing path separator or not.
+func TestCopyCaseJ(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcDir := joinTrailingSep(tmpDirA, "dir1") + "."
+	dstDir := filepath.Join(tmpDirB, "dir5")
+
+	var err error
+
+	// first to create an empty dir
+	if err = os.MkdirAll(dstDir, os.FileMode(0755)); err != nil {
+		t.Fatalf("unable to make dstDir: %s", err)
+	}
+
+	if err = testCopyHelper(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, srcDir); err != nil {
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	if err = os.MkdirAll(dstDir, os.FileMode(0755)); err != nil {
+		t.Fatalf("unable to make dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "dir5")
+
+	if err = testCopyHelper(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, srcDir); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// J. Symbol link following version:
+//    SRC specifies a directory's contents only and DST exists as a directory.
+//    This should copy the contents of the SRC directory (but not the directory
+//    itself) into the DST directory. Ensure this works whether DST has a
+//    trailing path separator or not.
+func TestCopyCaseJFSym(t *testing.T) {
+	tmpDirA, tmpDirB := getTestTempDirs(t)
+	defer removeAllPaths(tmpDirA, tmpDirB)
+
+	// Load A and B with some sample files and directories.
+	createSampleDir(t, tmpDirA)
+	createSampleDir(t, tmpDirB)
+
+	srcDir := joinTrailingSep(tmpDirA, "dirSymlink") + "."
+	linkTarget := filepath.Join(tmpDirA, "dir1")
+	dstDir := filepath.Join(tmpDirB, "dir5")
+
+	var err error
+
+	// first to create an empty dir
+	if err = os.MkdirAll(dstDir, os.FileMode(0755)); err != nil {
+		t.Fatalf("unable to make dstDir: %s", err)
+	}
+
+	if err = testCopyHelperFSym(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, linkTarget); err != nil {
+		t.Fatal(err)
+	}
+
+	// Now try again but using a trailing path separator for dstDir.
+
+	if err = os.RemoveAll(dstDir); err != nil {
+		t.Fatalf("unable to remove dstDir: %s", err)
+	}
+
+	if err = os.MkdirAll(dstDir, os.FileMode(0755)); err != nil {
+		t.Fatalf("unable to make dstDir: %s", err)
+	}
+
+	dstDir = joinTrailingSep(tmpDirB, "dir5")
+
+	if err = testCopyHelperFSym(t, srcDir, dstDir); err != nil {
+		t.Fatalf("unexpected error %T: %s", err, err)
+	}
+
+	if err = dirContentsEqual(t, dstDir, linkTarget); err != nil {
+		t.Fatal(err)
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/copy_unix.go

@@ -0,0 +1,11 @@
+// +build !windows
+
+package archive
+
+import (
+	"path/filepath"
+)
+
+func normalizePath(path string) string {
+	return filepath.ToSlash(path)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/copy_windows.go

@@ -0,0 +1,9 @@
+package archive
+
+import (
+	"path/filepath"
+)
+
+func normalizePath(path string) string {
+	return filepath.FromSlash(path)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/diff.go

@@ -0,0 +1,279 @@
+package archive
+
+import (
+	"archive/tar"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/docker/docker/pkg/idtools"
+	"github.com/docker/docker/pkg/pools"
+	"github.com/docker/docker/pkg/system"
+)
+
+// UnpackLayer unpack `layer` to a `dest`. The stream `layer` can be
+// compressed or uncompressed.
+// Returns the size in bytes of the contents of the layer.
+func UnpackLayer(dest string, layer Reader, options *TarOptions) (size int64, err error) {
+	tr := tar.NewReader(layer)
+	trBuf := pools.BufioReader32KPool.Get(tr)
+	defer pools.BufioReader32KPool.Put(trBuf)
+
+	var dirs []*tar.Header
+	unpackedPaths := make(map[string]struct{})
+
+	if options == nil {
+		options = &TarOptions{}
+	}
+	if options.ExcludePatterns == nil {
+		options.ExcludePatterns = []string{}
+	}
+	remappedRootUID, remappedRootGID, err := idtools.GetRootUIDGID(options.UIDMaps, options.GIDMaps)
+	if err != nil {
+		return 0, err
+	}
+
+	aufsTempdir := ""
+	aufsHardlinks := make(map[string]*tar.Header)
+
+	if options == nil {
+		options = &TarOptions{}
+	}
+	// Iterate through the files in the archive.
+	for {
+		hdr, err := tr.Next()
+		if err == io.EOF {
+			// end of tar archive
+			break
+		}
+		if err != nil {
+			return 0, err
+		}
+
+		size += hdr.Size
+
+		// Normalize name, for safety and for a simple is-root check
+		hdr.Name = filepath.Clean(hdr.Name)
+
+		// Windows does not support filenames with colons in them. Ignore
+		// these files. This is not a problem though (although it might
+		// appear that it is). Let's suppose a client is running docker pull.
+		// The daemon it points to is Windows. Would it make sense for the
+		// client to be doing a docker pull Ubuntu for example (which has files
+		// with colons in the name under /usr/share/man/man3)? No, absolutely
+		// not as it would really only make sense that they were pulling a
+		// Windows image. However, for development, it is necessary to be able
+		// to pull Linux images which are in the repository.
+		//
+		// TODO Windows. Once the registry is aware of what images are Windows-
+		// specific or Linux-specific, this warning should be changed to an error
+		// to cater for the situation where someone does manage to upload a Linux
+		// image but have it tagged as Windows inadvertently.
+		if runtime.GOOS == "windows" {
+			if strings.Contains(hdr.Name, ":") {
+				logrus.Warnf("Windows: Ignoring %s (is this a Linux image?)", hdr.Name)
+				continue
+			}
+		}
+
+		// Note as these operations are platform specific, so must the slash be.
+		if !strings.HasSuffix(hdr.Name, string(os.PathSeparator)) {
+			// Not the root directory, ensure that the parent directory exists.
+			// This happened in some tests where an image had a tarfile without any
+			// parent directories.
+			parent := filepath.Dir(hdr.Name)
+			parentPath := filepath.Join(dest, parent)
+
+			if _, err := os.Lstat(parentPath); err != nil && os.IsNotExist(err) {
+				err = system.MkdirAll(parentPath, 0600)
+				if err != nil {
+					return 0, err
+				}
+			}
+		}
+
+		// Skip AUFS metadata dirs
+		if strings.HasPrefix(hdr.Name, WhiteoutMetaPrefix) {
+			// Regular files inside /.wh..wh.plnk can be used as hardlink targets
+			// We don't want this directory, but we need the files in them so that
+			// such hardlinks can be resolved.
+			if strings.HasPrefix(hdr.Name, WhiteoutLinkDir) && hdr.Typeflag == tar.TypeReg {
+				basename := filepath.Base(hdr.Name)
+				aufsHardlinks[basename] = hdr
+				if aufsTempdir == "" {
+					if aufsTempdir, err = ioutil.TempDir("", "dockerplnk"); err != nil {
+						return 0, err
+					}
+					defer os.RemoveAll(aufsTempdir)
+				}
+				if err := createTarFile(filepath.Join(aufsTempdir, basename), dest, hdr, tr, true, nil); err != nil {
+					return 0, err
+				}
+			}
+
+			if hdr.Name != WhiteoutOpaqueDir {
+				continue
+			}
+		}
+		path := filepath.Join(dest, hdr.Name)
+		rel, err := filepath.Rel(dest, path)
+		if err != nil {
+			return 0, err
+		}
+
+		// Note as these operations are platform specific, so must the slash be.
+		if strings.HasPrefix(rel, ".."+string(os.PathSeparator)) {
+			return 0, breakoutError(fmt.Errorf("%q is outside of %q", hdr.Name, dest))
+		}
+		base := filepath.Base(path)
+
+		if strings.HasPrefix(base, WhiteoutPrefix) {
+			dir := filepath.Dir(path)
+			if base == WhiteoutOpaqueDir {
+				_, err := os.Lstat(dir)
+				if err != nil {
+					return 0, err
+				}
+				err = filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
+					if err != nil {
+						if os.IsNotExist(err) {
+							err = nil // parent was deleted
+						}
+						return err
+					}
+					if path == dir {
+						return nil
+					}
+					if _, exists := unpackedPaths[path]; !exists {
+						err := os.RemoveAll(path)
+						return err
+					}
+					return nil
+				})
+				if err != nil {
+					return 0, err
+				}
+			} else {
+				originalBase := base[len(WhiteoutPrefix):]
+				originalPath := filepath.Join(dir, originalBase)
+				if err := os.RemoveAll(originalPath); err != nil {
+					return 0, err
+				}
+			}
+		} else {
+			// If path exits we almost always just want to remove and replace it.
+			// The only exception is when it is a directory *and* the file from
+			// the layer is also a directory. Then we want to merge them (i.e.
+			// just apply the metadata from the layer).
+			if fi, err := os.Lstat(path); err == nil {
+				if !(fi.IsDir() && hdr.Typeflag == tar.TypeDir) {
+					if err := os.RemoveAll(path); err != nil {
+						return 0, err
+					}
+				}
+			}
+
+			trBuf.Reset(tr)
+			srcData := io.Reader(trBuf)
+			srcHdr := hdr
+
+			// Hard links into /.wh..wh.plnk don't work, as we don't extract that directory, so
+			// we manually retarget these into the temporary files we extracted them into
+			if hdr.Typeflag == tar.TypeLink && strings.HasPrefix(filepath.Clean(hdr.Linkname), WhiteoutLinkDir) {
+				linkBasename := filepath.Base(hdr.Linkname)
+				srcHdr = aufsHardlinks[linkBasename]
+				if srcHdr == nil {
+					return 0, fmt.Errorf("Invalid aufs hardlink")
+				}
+				tmpFile, err := os.Open(filepath.Join(aufsTempdir, linkBasename))
+				if err != nil {
+					return 0, err
+				}
+				defer tmpFile.Close()
+				srcData = tmpFile
+			}
+
+			// if the options contain a uid & gid maps, convert header uid/gid
+			// entries using the maps such that lchown sets the proper mapped
+			// uid/gid after writing the file. We only perform this mapping if
+			// the file isn't already owned by the remapped root UID or GID, as
+			// that specific uid/gid has no mapping from container -> host, and
+			// those files already have the proper ownership for inside the
+			// container.
+			if srcHdr.Uid != remappedRootUID {
+				xUID, err := idtools.ToHost(srcHdr.Uid, options.UIDMaps)
+				if err != nil {
+					return 0, err
+				}
+				srcHdr.Uid = xUID
+			}
+			if srcHdr.Gid != remappedRootGID {
+				xGID, err := idtools.ToHost(srcHdr.Gid, options.GIDMaps)
+				if err != nil {
+					return 0, err
+				}
+				srcHdr.Gid = xGID
+			}
+			if err := createTarFile(path, dest, srcHdr, srcData, true, nil); err != nil {
+				return 0, err
+			}
+
+			// Directory mtimes must be handled at the end to avoid further
+			// file creation in them to modify the directory mtime
+			if hdr.Typeflag == tar.TypeDir {
+				dirs = append(dirs, hdr)
+			}
+			unpackedPaths[path] = struct{}{}
+		}
+	}
+
+	for _, hdr := range dirs {
+		path := filepath.Join(dest, hdr.Name)
+		if err := system.Chtimes(path, hdr.AccessTime, hdr.ModTime); err != nil {
+			return 0, err
+		}
+	}
+
+	return size, nil
+}
+
+// ApplyLayer parses a diff in the standard layer format from `layer`,
+// and applies it to the directory `dest`. The stream `layer` can be
+// compressed or uncompressed.
+// Returns the size in bytes of the contents of the layer.
+func ApplyLayer(dest string, layer Reader) (int64, error) {
+	return applyLayerHandler(dest, layer, &TarOptions{}, true)
+}
+
+// ApplyUncompressedLayer parses a diff in the standard layer format from
+// `layer`, and applies it to the directory `dest`. The stream `layer`
+// can only be uncompressed.
+// Returns the size in bytes of the contents of the layer.
+func ApplyUncompressedLayer(dest string, layer Reader, options *TarOptions) (int64, error) {
+	return applyLayerHandler(dest, layer, options, false)
+}
+
+// do the bulk load of ApplyLayer, but allow for not calling DecompressStream
+func applyLayerHandler(dest string, layer Reader, options *TarOptions, decompress bool) (int64, error) {
+	dest = filepath.Clean(dest)
+
+	// We need to be able to set any perms
+	oldmask, err := system.Umask(0)
+	if err != nil {
+		return 0, err
+	}
+	defer system.Umask(oldmask) // ignore err, ErrNotSupportedPlatform
+
+	if decompress {
+		layer, err = DecompressStream(layer)
+		if err != nil {
+			return 0, err
+		}
+	}
+	return UnpackLayer(dest, layer, options)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/diff_test.go

@@ -0,0 +1,370 @@
+package archive
+
+import (
+	"archive/tar"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+
+	"github.com/docker/docker/pkg/ioutils"
+)
+
+func TestApplyLayerInvalidFilenames(t *testing.T) {
+	for i, headers := range [][]*tar.Header{
+		{
+			{
+				Name:     "../victim/dotdot",
+				Typeflag: tar.TypeReg,
+				Mode:     0644,
+			},
+		},
+		{
+			{
+				// Note the leading slash
+				Name:     "/../victim/slash-dotdot",
+				Typeflag: tar.TypeReg,
+				Mode:     0644,
+			},
+		},
+	} {
+		if err := testBreakout("applylayer", "docker-TestApplyLayerInvalidFilenames", headers); err != nil {
+			t.Fatalf("i=%d. %v", i, err)
+		}
+	}
+}
+
+func TestApplyLayerInvalidHardlink(t *testing.T) {
+	for i, headers := range [][]*tar.Header{
+		{ // try reading victim/hello (../)
+			{
+				Name:     "dotdot",
+				Typeflag: tar.TypeLink,
+				Linkname: "../victim/hello",
+				Mode:     0644,
+			},
+		},
+		{ // try reading victim/hello (/../)
+			{
+				Name:     "slash-dotdot",
+				Typeflag: tar.TypeLink,
+				// Note the leading slash
+				Linkname: "/../victim/hello",
+				Mode:     0644,
+			},
+		},
+		{ // try writing victim/file
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeLink,
+				Linkname: "../victim",
+				Mode:     0755,
+			},
+			{
+				Name:     "loophole-victim/file",
+				Typeflag: tar.TypeReg,
+				Mode:     0644,
+			},
+		},
+		{ // try reading victim/hello (hardlink, symlink)
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeLink,
+				Linkname: "../victim",
+				Mode:     0755,
+			},
+			{
+				Name:     "symlink",
+				Typeflag: tar.TypeSymlink,
+				Linkname: "loophole-victim/hello",
+				Mode:     0644,
+			},
+		},
+		{ // Try reading victim/hello (hardlink, hardlink)
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeLink,
+				Linkname: "../victim",
+				Mode:     0755,
+			},
+			{
+				Name:     "hardlink",
+				Typeflag: tar.TypeLink,
+				Linkname: "loophole-victim/hello",
+				Mode:     0644,
+			},
+		},
+		{ // Try removing victim directory (hardlink)
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeLink,
+				Linkname: "../victim",
+				Mode:     0755,
+			},
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeReg,
+				Mode:     0644,
+			},
+		},
+	} {
+		if err := testBreakout("applylayer", "docker-TestApplyLayerInvalidHardlink", headers); err != nil {
+			t.Fatalf("i=%d. %v", i, err)
+		}
+	}
+}
+
+func TestApplyLayerInvalidSymlink(t *testing.T) {
+	for i, headers := range [][]*tar.Header{
+		{ // try reading victim/hello (../)
+			{
+				Name:     "dotdot",
+				Typeflag: tar.TypeSymlink,
+				Linkname: "../victim/hello",
+				Mode:     0644,
+			},
+		},
+		{ // try reading victim/hello (/../)
+			{
+				Name:     "slash-dotdot",
+				Typeflag: tar.TypeSymlink,
+				// Note the leading slash
+				Linkname: "/../victim/hello",
+				Mode:     0644,
+			},
+		},
+		{ // try writing victim/file
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeSymlink,
+				Linkname: "../victim",
+				Mode:     0755,
+			},
+			{
+				Name:     "loophole-victim/file",
+				Typeflag: tar.TypeReg,
+				Mode:     0644,
+			},
+		},
+		{ // try reading victim/hello (symlink, symlink)
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeSymlink,
+				Linkname: "../victim",
+				Mode:     0755,
+			},
+			{
+				Name:     "symlink",
+				Typeflag: tar.TypeSymlink,
+				Linkname: "loophole-victim/hello",
+				Mode:     0644,
+			},
+		},
+		{ // try reading victim/hello (symlink, hardlink)
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeSymlink,
+				Linkname: "../victim",
+				Mode:     0755,
+			},
+			{
+				Name:     "hardlink",
+				Typeflag: tar.TypeLink,
+				Linkname: "loophole-victim/hello",
+				Mode:     0644,
+			},
+		},
+		{ // try removing victim directory (symlink)
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeSymlink,
+				Linkname: "../victim",
+				Mode:     0755,
+			},
+			{
+				Name:     "loophole-victim",
+				Typeflag: tar.TypeReg,
+				Mode:     0644,
+			},
+		},
+	} {
+		if err := testBreakout("applylayer", "docker-TestApplyLayerInvalidSymlink", headers); err != nil {
+			t.Fatalf("i=%d. %v", i, err)
+		}
+	}
+}
+
+func TestApplyLayerWhiteouts(t *testing.T) {
+	wd, err := ioutil.TempDir("", "graphdriver-test-whiteouts")
+	if err != nil {
+		return
+	}
+	defer os.RemoveAll(wd)
+
+	base := []string{
+		".baz",
+		"bar/",
+		"bar/bax",
+		"bar/bay/",
+		"baz",
+		"foo/",
+		"foo/.abc",
+		"foo/.bcd/",
+		"foo/.bcd/a",
+		"foo/cde/",
+		"foo/cde/def",
+		"foo/cde/efg",
+		"foo/fgh",
+		"foobar",
+	}
+
+	type tcase struct {
+		change, expected []string
+	}
+
+	tcases := []tcase{
+		{
+			base,
+			base,
+		},
+		{
+			[]string{
+				".bay",
+				".wh.baz",
+				"foo/",
+				"foo/.bce",
+				"foo/.wh..wh..opq",
+				"foo/cde/",
+				"foo/cde/efg",
+			},
+			[]string{
+				".bay",
+				".baz",
+				"bar/",
+				"bar/bax",
+				"bar/bay/",
+				"foo/",
+				"foo/.bce",
+				"foo/cde/",
+				"foo/cde/efg",
+				"foobar",
+			},
+		},
+		{
+			[]string{
+				".bay",
+				".wh..baz",
+				".wh.foobar",
+				"foo/",
+				"foo/.abc",
+				"foo/.wh.cde",
+				"bar/",
+			},
+			[]string{
+				".bay",
+				"bar/",
+				"bar/bax",
+				"bar/bay/",
+				"foo/",
+				"foo/.abc",
+				"foo/.bce",
+			},
+		},
+		{
+			[]string{
+				".abc",
+				".wh..wh..opq",
+				"foobar",
+			},
+			[]string{
+				".abc",
+				"foobar",
+			},
+		},
+	}
+
+	for i, tc := range tcases {
+		l, err := makeTestLayer(tc.change)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		_, err = UnpackLayer(wd, l, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		err = l.Close()
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		paths, err := readDirContents(wd)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if !reflect.DeepEqual(tc.expected, paths) {
+			t.Fatalf("invalid files for layer %d: expected %q, got %q", i, tc.expected, paths)
+		}
+	}
+
+}
+
+func makeTestLayer(paths []string) (rc io.ReadCloser, err error) {
+	tmpDir, err := ioutil.TempDir("", "graphdriver-test-mklayer")
+	if err != nil {
+		return
+	}
+	defer func() {
+		if err != nil {
+			os.RemoveAll(tmpDir)
+		}
+	}()
+	for _, p := range paths {
+		if p[len(p)-1] == filepath.Separator {
+			if err = os.MkdirAll(filepath.Join(tmpDir, p), 0700); err != nil {
+				return
+			}
+		} else {
+			if err = ioutil.WriteFile(filepath.Join(tmpDir, p), nil, 0600); err != nil {
+				return
+			}
+		}
+	}
+	archive, err := Tar(tmpDir, Uncompressed)
+	if err != nil {
+		return
+	}
+	return ioutils.NewReadCloserWrapper(archive, func() error {
+		err := archive.Close()
+		os.RemoveAll(tmpDir)
+		return err
+	}), nil
+}
+
+func readDirContents(root string) ([]string, error) {
+	var files []string
+	err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if path == root {
+			return nil
+		}
+		rel, err := filepath.Rel(root, path)
+		if err != nil {
+			return err
+		}
+		if info.IsDir() {
+			rel = rel + "/"
+		}
+		files = append(files, rel)
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return files, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/example_changes.go

@@ -0,0 +1,97 @@
+// +build ignore
+
+// Simple tool to create an archive stream from an old and new directory
+//
+// By default it will stream the comparison of two temporary directories with junk files
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/docker/docker/pkg/archive"
+)
+
+var (
+	flDebug  = flag.Bool("D", false, "debugging output")
+	flNewDir = flag.String("newdir", "", "")
+	flOldDir = flag.String("olddir", "", "")
+	log      = logrus.New()
+)
+
+func main() {
+	flag.Usage = func() {
+		fmt.Println("Produce a tar from comparing two directory paths. By default a demo tar is created of around 200 files (including hardlinks)")
+		fmt.Printf("%s [OPTIONS]\n", os.Args[0])
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+	log.Out = os.Stderr
+	if (len(os.Getenv("DEBUG")) > 0) || *flDebug {
+		logrus.SetLevel(logrus.DebugLevel)
+	}
+	var newDir, oldDir string
+
+	if len(*flNewDir) == 0 {
+		var err error
+		newDir, err = ioutil.TempDir("", "docker-test-newDir")
+		if err != nil {
+			log.Fatal(err)
+		}
+		defer os.RemoveAll(newDir)
+		if _, err := prepareUntarSourceDirectory(100, newDir, true); err != nil {
+			log.Fatal(err)
+		}
+	} else {
+		newDir = *flNewDir
+	}
+
+	if len(*flOldDir) == 0 {
+		oldDir, err := ioutil.TempDir("", "docker-test-oldDir")
+		if err != nil {
+			log.Fatal(err)
+		}
+		defer os.RemoveAll(oldDir)
+	} else {
+		oldDir = *flOldDir
+	}
+
+	changes, err := archive.ChangesDirs(newDir, oldDir)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	a, err := archive.ExportChanges(newDir, changes)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer a.Close()
+
+	i, err := io.Copy(os.Stdout, a)
+	if err != nil && err != io.EOF {
+		log.Fatal(err)
+	}
+	fmt.Fprintf(os.Stderr, "wrote archive of %d bytes", i)
+}
+
+func prepareUntarSourceDirectory(numberOfFiles int, targetPath string, makeLinks bool) (int, error) {
+	fileData := []byte("fooo")
+	for n := 0; n < numberOfFiles; n++ {
+		fileName := fmt.Sprintf("file-%d", n)
+		if err := ioutil.WriteFile(path.Join(targetPath, fileName), fileData, 0700); err != nil {
+			return 0, err
+		}
+		if makeLinks {
+			if err := os.Link(path.Join(targetPath, fileName), path.Join(targetPath, fileName+"-link")); err != nil {
+				return 0, err
+			}
+		}
+	}
+	totalSize := numberOfFiles * len(fileData)
+	return totalSize, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/time_linux.go

@@ -0,0 +1,16 @@
+package archive
+
+import (
+	"syscall"
+	"time"
+)
+
+func timeToTimespec(time time.Time) (ts syscall.Timespec) {
+	if time.IsZero() {
+		// Return UTIME_OMIT special value
+		ts.Sec = 0
+		ts.Nsec = ((1 << 30) - 2)
+		return
+	}
+	return syscall.NsecToTimespec(time.UnixNano())
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/time_unsupported.go

@@ -0,0 +1,16 @@
+// +build !linux
+
+package archive
+
+import (
+	"syscall"
+	"time"
+)
+
+func timeToTimespec(time time.Time) (ts syscall.Timespec) {
+	nsec := int64(0)
+	if !time.IsZero() {
+		nsec = time.UnixNano()
+	}
+	return syscall.NsecToTimespec(nsec)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/utils_test.go

@@ -0,0 +1,166 @@
+package archive
+
+import (
+	"archive/tar"
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+var testUntarFns = map[string]func(string, io.Reader) error{
+	"untar": func(dest string, r io.Reader) error {
+		return Untar(r, dest, nil)
+	},
+	"applylayer": func(dest string, r io.Reader) error {
+		_, err := ApplyLayer(dest, Reader(r))
+		return err
+	},
+}
+
+// testBreakout is a helper function that, within the provided `tmpdir` directory,
+// creates a `victim` folder with a generated `hello` file in it.
+// `untar` extracts to a directory named `dest`, the tar file created from `headers`.
+//
+// Here are the tested scenarios:
+// - removed `victim` folder				(write)
+// - removed files from `victim` folder			(write)
+// - new files in `victim` folder			(write)
+// - modified files in `victim` folder			(write)
+// - file in `dest` with same content as `victim/hello` (read)
+//
+// When using testBreakout make sure you cover one of the scenarios listed above.
+func testBreakout(untarFn string, tmpdir string, headers []*tar.Header) error {
+	tmpdir, err := ioutil.TempDir("", tmpdir)
+	if err != nil {
+		return err
+	}
+	defer os.RemoveAll(tmpdir)
+
+	dest := filepath.Join(tmpdir, "dest")
+	if err := os.Mkdir(dest, 0755); err != nil {
+		return err
+	}
+
+	victim := filepath.Join(tmpdir, "victim")
+	if err := os.Mkdir(victim, 0755); err != nil {
+		return err
+	}
+	hello := filepath.Join(victim, "hello")
+	helloData, err := time.Now().MarshalText()
+	if err != nil {
+		return err
+	}
+	if err := ioutil.WriteFile(hello, helloData, 0644); err != nil {
+		return err
+	}
+	helloStat, err := os.Stat(hello)
+	if err != nil {
+		return err
+	}
+
+	reader, writer := io.Pipe()
+	go func() {
+		t := tar.NewWriter(writer)
+		for _, hdr := range headers {
+			t.WriteHeader(hdr)
+		}
+		t.Close()
+	}()
+
+	untar := testUntarFns[untarFn]
+	if untar == nil {
+		return fmt.Errorf("could not find untar function %q in testUntarFns", untarFn)
+	}
+	if err := untar(dest, reader); err != nil {
+		if _, ok := err.(breakoutError); !ok {
+			// If untar returns an error unrelated to an archive breakout,
+			// then consider this an unexpected error and abort.
+			return err
+		}
+		// Here, untar detected the breakout.
+		// Let's move on verifying that indeed there was no breakout.
+		fmt.Printf("breakoutError: %v\n", err)
+	}
+
+	// Check victim folder
+	f, err := os.Open(victim)
+	if err != nil {
+		// codepath taken if victim folder was removed
+		return fmt.Errorf("archive breakout: error reading %q: %v", victim, err)
+	}
+	defer f.Close()
+
+	// Check contents of victim folder
+	//
+	// We are only interested in getting 2 files from the victim folder, because if all is well
+	// we expect only one result, the `hello` file. If there is a second result, it cannot
+	// hold the same name `hello` and we assume that a new file got created in the victim folder.
+	// That is enough to detect an archive breakout.
+	names, err := f.Readdirnames(2)
+	if err != nil {
+		// codepath taken if victim is not a folder
+		return fmt.Errorf("archive breakout: error reading directory content of %q: %v", victim, err)
+	}
+	for _, name := range names {
+		if name != "hello" {
+			// codepath taken if new file was created in victim folder
+			return fmt.Errorf("archive breakout: new file %q", name)
+		}
+	}
+
+	// Check victim/hello
+	f, err = os.Open(hello)
+	if err != nil {
+		// codepath taken if read permissions were removed
+		return fmt.Errorf("archive breakout: could not lstat %q: %v", hello, err)
+	}
+	defer f.Close()
+	b, err := ioutil.ReadAll(f)
+	if err != nil {
+		return err
+	}
+	fi, err := f.Stat()
+	if err != nil {
+		return err
+	}
+	if helloStat.IsDir() != fi.IsDir() ||
+		// TODO: cannot check for fi.ModTime() change
+		helloStat.Mode() != fi.Mode() ||
+		helloStat.Size() != fi.Size() ||
+		!bytes.Equal(helloData, b) {
+		// codepath taken if hello has been modified
+		return fmt.Errorf("archive breakout: file %q has been modified. Contents: expected=%q, got=%q. FileInfo: expected=%#v, got=%#v", hello, helloData, b, helloStat, fi)
+	}
+
+	// Check that nothing in dest/ has the same content as victim/hello.
+	// Since victim/hello was generated with time.Now(), it is safe to assume
+	// that any file whose content matches exactly victim/hello, managed somehow
+	// to access victim/hello.
+	return filepath.Walk(dest, func(path string, info os.FileInfo, err error) error {
+		if info.IsDir() {
+			if err != nil {
+				// skip directory if error
+				return filepath.SkipDir
+			}
+			// enter directory
+			return nil
+		}
+		if err != nil {
+			// skip file if error
+			return nil
+		}
+		b, err := ioutil.ReadFile(path)
+		if err != nil {
+			// Houston, we have a problem. Aborting (space)walk.
+			return err
+		}
+		if bytes.Equal(helloData, b) {
+			return fmt.Errorf("archive breakout: file %q has been accessed via %q", hello, path)
+		}
+		return nil
+	})
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/whiteouts.go

@@ -0,0 +1,23 @@
+package archive
+
+// Whiteouts are files with a special meaning for the layered filesystem.
+// Docker uses AUFS whiteout files inside exported archives. In other
+// filesystems these files are generated/handled on tar creation/extraction.
+
+// WhiteoutPrefix prefix means file is a whiteout. If this is followed by a
+// filename this means that file has been removed from the base layer.
+const WhiteoutPrefix = ".wh."
+
+// WhiteoutMetaPrefix prefix means whiteout has a special meaning and is not
+// for removing an actual file. Normally these files are excluded from exported
+// archives.
+const WhiteoutMetaPrefix = WhiteoutPrefix + WhiteoutPrefix
+
+// WhiteoutLinkDir is a directory AUFS uses for storing hardlink links to other
+// layers. Normally these should not go into exported archives and all changed
+// hardlinks should be copied to the top layer.
+const WhiteoutLinkDir = WhiteoutMetaPrefix + "plnk"
+
+// WhiteoutOpaqueDir file means directory has been made opaque - meaning
+// readdir calls to this directory do not follow to lower layers.
+const WhiteoutOpaqueDir = WhiteoutMetaPrefix + ".opq"

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/wrap.go

@@ -0,0 +1,59 @@
+package archive
+
+import (
+	"archive/tar"
+	"bytes"
+	"io/ioutil"
+)
+
+// Generate generates a new archive from the content provided
+// as input.
+//
+// `files` is a sequence of path/content pairs. A new file is
+// added to the archive for each pair.
+// If the last pair is incomplete, the file is created with an
+// empty content. For example:
+//
+// Generate("foo.txt", "hello world", "emptyfile")
+//
+// The above call will return an archive with 2 files:
+//  * ./foo.txt with content "hello world"
+//  * ./empty with empty content
+//
+// FIXME: stream content instead of buffering
+// FIXME: specify permissions and other archive metadata
+func Generate(input ...string) (Archive, error) {
+	files := parseStringPairs(input...)
+	buf := new(bytes.Buffer)
+	tw := tar.NewWriter(buf)
+	for _, file := range files {
+		name, content := file[0], file[1]
+		hdr := &tar.Header{
+			Name: name,
+			Size: int64(len(content)),
+		}
+		if err := tw.WriteHeader(hdr); err != nil {
+			return nil, err
+		}
+		if _, err := tw.Write([]byte(content)); err != nil {
+			return nil, err
+		}
+	}
+	if err := tw.Close(); err != nil {
+		return nil, err
+	}
+	return ioutil.NopCloser(buf), nil
+}
+
+func parseStringPairs(input ...string) (output [][2]string) {
+	output = make([][2]string, 0, len(input)/2+1)
+	for i := 0; i < len(input); i += 2 {
+		var pair [2]string
+		pair[0] = input[i]
+		if i+1 < len(input) {
+			pair[1] = input[i+1]
+		}
+		output = append(output, pair)
+	}
+	return
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/archive/wrap_test.go

@@ -0,0 +1,98 @@
+package archive
+
+import (
+	"archive/tar"
+	"bytes"
+	"io"
+	"testing"
+)
+
+func TestGenerateEmptyFile(t *testing.T) {
+	archive, err := Generate("emptyFile")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if archive == nil {
+		t.Fatal("The generated archive should not be nil.")
+	}
+
+	expectedFiles := [][]string{
+		{"emptyFile", ""},
+	}
+
+	tr := tar.NewReader(archive)
+	actualFiles := make([][]string, 0, 10)
+	i := 0
+	for {
+		hdr, err := tr.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			t.Fatal(err)
+		}
+		buf := new(bytes.Buffer)
+		buf.ReadFrom(tr)
+		content := buf.String()
+		actualFiles = append(actualFiles, []string{hdr.Name, content})
+		i++
+	}
+	if len(actualFiles) != len(expectedFiles) {
+		t.Fatalf("Number of expected file %d, got %d.", len(expectedFiles), len(actualFiles))
+	}
+	for i := 0; i < len(expectedFiles); i++ {
+		actual := actualFiles[i]
+		expected := expectedFiles[i]
+		if actual[0] != expected[0] {
+			t.Fatalf("Expected name '%s', Actual name '%s'", expected[0], actual[0])
+		}
+		if actual[1] != expected[1] {
+			t.Fatalf("Expected content '%s', Actual content '%s'", expected[1], actual[1])
+		}
+	}
+}
+
+func TestGenerateWithContent(t *testing.T) {
+	archive, err := Generate("file", "content")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if archive == nil {
+		t.Fatal("The generated archive should not be nil.")
+	}
+
+	expectedFiles := [][]string{
+		{"file", "content"},
+	}
+
+	tr := tar.NewReader(archive)
+	actualFiles := make([][]string, 0, 10)
+	i := 0
+	for {
+		hdr, err := tr.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			t.Fatal(err)
+		}
+		buf := new(bytes.Buffer)
+		buf.ReadFrom(tr)
+		content := buf.String()
+		actualFiles = append(actualFiles, []string{hdr.Name, content})
+		i++
+	}
+	if len(actualFiles) != len(expectedFiles) {
+		t.Fatalf("Number of expected file %d, got %d.", len(expectedFiles), len(actualFiles))
+	}
+	for i := 0; i < len(expectedFiles); i++ {
+		actual := actualFiles[i]
+		expected := expectedFiles[i]
+		if actual[0] != expected[0] {
+			t.Fatalf("Expected name '%s', Actual name '%s'", expected[0], actual[0])
+		}
+		if actual[1] != expected[1] {
+			t.Fatalf("Expected content '%s', Actual content '%s'", expected[1], actual[1])
+		}
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/fileutils/fileutils.go

@@ -0,0 +1,279 @@
+package fileutils
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"text/scanner"
+
+	"github.com/Sirupsen/logrus"
+)
+
+// exclusion return true if the specified pattern is an exclusion
+func exclusion(pattern string) bool {
+	return pattern[0] == '!'
+}
+
+// empty return true if the specified pattern is empty
+func empty(pattern string) bool {
+	return pattern == ""
+}
+
+// CleanPatterns takes a slice of patterns returns a new
+// slice of patterns cleaned with filepath.Clean, stripped
+// of any empty patterns and lets the caller know whether the
+// slice contains any exception patterns (prefixed with !).
+func CleanPatterns(patterns []string) ([]string, [][]string, bool, error) {
+	// Loop over exclusion patterns and:
+	// 1. Clean them up.
+	// 2. Indicate whether we are dealing with any exception rules.
+	// 3. Error if we see a single exclusion marker on it's own (!).
+	cleanedPatterns := []string{}
+	patternDirs := [][]string{}
+	exceptions := false
+	for _, pattern := range patterns {
+		// Eliminate leading and trailing whitespace.
+		pattern = strings.TrimSpace(pattern)
+		if empty(pattern) {
+			continue
+		}
+		if exclusion(pattern) {
+			if len(pattern) == 1 {
+				return nil, nil, false, errors.New("Illegal exclusion pattern: !")
+			}
+			exceptions = true
+		}
+		pattern = filepath.Clean(pattern)
+		cleanedPatterns = append(cleanedPatterns, pattern)
+		if exclusion(pattern) {
+			pattern = pattern[1:]
+		}
+		patternDirs = append(patternDirs, strings.Split(pattern, "/"))
+	}
+
+	return cleanedPatterns, patternDirs, exceptions, nil
+}
+
+// Matches returns true if file matches any of the patterns
+// and isn't excluded by any of the subsequent patterns.
+func Matches(file string, patterns []string) (bool, error) {
+	file = filepath.Clean(file)
+
+	if file == "." {
+		// Don't let them exclude everything, kind of silly.
+		return false, nil
+	}
+
+	patterns, patDirs, _, err := CleanPatterns(patterns)
+	if err != nil {
+		return false, err
+	}
+
+	return OptimizedMatches(file, patterns, patDirs)
+}
+
+// OptimizedMatches is basically the same as fileutils.Matches() but optimized for archive.go.
+// It will assume that the inputs have been preprocessed and therefore the function
+// doesn't need to do as much error checking and clean-up. This was done to avoid
+// repeating these steps on each file being checked during the archive process.
+// The more generic fileutils.Matches() can't make these assumptions.
+func OptimizedMatches(file string, patterns []string, patDirs [][]string) (bool, error) {
+	matched := false
+	parentPath := filepath.Dir(file)
+	parentPathDirs := strings.Split(parentPath, "/")
+
+	for i, pattern := range patterns {
+		negative := false
+
+		if exclusion(pattern) {
+			negative = true
+			pattern = pattern[1:]
+		}
+
+		match, err := regexpMatch(pattern, file)
+		if err != nil {
+			return false, fmt.Errorf("Error in pattern (%s): %s", pattern, err)
+		}
+
+		if !match && parentPath != "." {
+			// Check to see if the pattern matches one of our parent dirs.
+			if len(patDirs[i]) <= len(parentPathDirs) {
+				match, _ = regexpMatch(strings.Join(patDirs[i], "/"),
+					strings.Join(parentPathDirs[:len(patDirs[i])], "/"))
+			}
+		}
+
+		if match {
+			matched = !negative
+		}
+	}
+
+	if matched {
+		logrus.Debugf("Skipping excluded path: %s", file)
+	}
+
+	return matched, nil
+}
+
+// regexpMatch tries to match the logic of filepath.Match but
+// does so using regexp logic. We do this so that we can expand the
+// wildcard set to include other things, like "**" to mean any number
+// of directories.  This means that we should be backwards compatible
+// with filepath.Match(). We'll end up supporting more stuff, due to
+// the fact that we're using regexp, but that's ok - it does no harm.
+func regexpMatch(pattern, path string) (bool, error) {
+	regStr := "^"
+
+	// Do some syntax checking on the pattern.
+	// filepath's Match() has some really weird rules that are inconsistent
+	// so instead of trying to dup their logic, just call Match() for its
+	// error state and if there is an error in the pattern return it.
+	// If this becomes an issue we can remove this since its really only
+	// needed in the error (syntax) case - which isn't really critical.
+	if _, err := filepath.Match(pattern, path); err != nil {
+		return false, err
+	}
+
+	// Go through the pattern and convert it to a regexp.
+	// We use a scanner so we can support utf-8 chars.
+	var scan scanner.Scanner
+	scan.Init(strings.NewReader(pattern))
+
+	sl := string(os.PathSeparator)
+	escSL := sl
+	if sl == `\` {
+		escSL += `\`
+	}
+
+	for scan.Peek() != scanner.EOF {
+		ch := scan.Next()
+
+		if ch == '*' {
+			if scan.Peek() == '*' {
+				// is some flavor of "**"
+				scan.Next()
+
+				if scan.Peek() == scanner.EOF {
+					// is "**EOF" - to align with .gitignore just accept all
+					regStr += ".*"
+				} else {
+					// is "**"
+					regStr += "((.*" + escSL + ")|([^" + escSL + "]*))"
+				}
+
+				// Treat **/ as ** so eat the "/"
+				if string(scan.Peek()) == sl {
+					scan.Next()
+				}
+			} else {
+				// is "*" so map it to anything but "/"
+				regStr += "[^" + escSL + "]*"
+			}
+		} else if ch == '?' {
+			// "?" is any char except "/"
+			regStr += "[^" + escSL + "]"
+		} else if strings.Index(".$", string(ch)) != -1 {
+			// Escape some regexp special chars that have no meaning
+			// in golang's filepath.Match
+			regStr += `\` + string(ch)
+		} else if ch == '\\' {
+			// escape next char. Note that a trailing \ in the pattern
+			// will be left alone (but need to escape it)
+			if sl == `\` {
+				// On windows map "\" to "\\", meaning an escaped backslash,
+				// and then just continue because filepath.Match on
+				// Windows doesn't allow escaping at all
+				regStr += escSL
+				continue
+			}
+			if scan.Peek() != scanner.EOF {
+				regStr += `\` + string(scan.Next())
+			} else {
+				regStr += `\`
+			}
+		} else {
+			regStr += string(ch)
+		}
+	}
+
+	regStr += "$"
+
+	res, err := regexp.MatchString(regStr, path)
+
+	// Map regexp's error to filepath's so no one knows we're not using filepath
+	if err != nil {
+		err = filepath.ErrBadPattern
+	}
+
+	return res, err
+}
+
+// CopyFile copies from src to dst until either EOF is reached
+// on src or an error occurs. It verifies src exists and remove
+// the dst if it exists.
+func CopyFile(src, dst string) (int64, error) {
+	cleanSrc := filepath.Clean(src)
+	cleanDst := filepath.Clean(dst)
+	if cleanSrc == cleanDst {
+		return 0, nil
+	}
+	sf, err := os.Open(cleanSrc)
+	if err != nil {
+		return 0, err
+	}
+	defer sf.Close()
+	if err := os.Remove(cleanDst); err != nil && !os.IsNotExist(err) {
+		return 0, err
+	}
+	df, err := os.Create(cleanDst)
+	if err != nil {
+		return 0, err
+	}
+	defer df.Close()
+	return io.Copy(df, sf)
+}
+
+// ReadSymlinkedDirectory returns the target directory of a symlink.
+// The target of the symbolic link may not be a file.
+func ReadSymlinkedDirectory(path string) (string, error) {
+	var realPath string
+	var err error
+	if realPath, err = filepath.Abs(path); err != nil {
+		return "", fmt.Errorf("unable to get absolute path for %s: %s", path, err)
+	}
+	if realPath, err = filepath.EvalSymlinks(realPath); err != nil {
+		return "", fmt.Errorf("failed to canonicalise path for %s: %s", path, err)
+	}
+	realPathInfo, err := os.Stat(realPath)
+	if err != nil {
+		return "", fmt.Errorf("failed to stat target '%s' of '%s': %s", realPath, path, err)
+	}
+	if !realPathInfo.Mode().IsDir() {
+		return "", fmt.Errorf("canonical path points to a file '%s'", realPath)
+	}
+	return realPath, nil
+}
+
+// CreateIfNotExists creates a file or a directory only if it does not already exist.
+func CreateIfNotExists(path string, isDir bool) error {
+	if _, err := os.Stat(path); err != nil {
+		if os.IsNotExist(err) {
+			if isDir {
+				return os.MkdirAll(path, 0755)
+			}
+			if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
+				return err
+			}
+			f, err := os.OpenFile(path, os.O_CREATE, 0755)
+			if err != nil {
+				return err
+			}
+			f.Close()
+		}
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/fileutils/fileutils_test.go

@@ -0,0 +1,573 @@
+package fileutils
+
+import (
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+// CopyFile with invalid src
+func TestCopyFileWithInvalidSrc(t *testing.T) {
+	tempFolder, err := ioutil.TempDir("", "docker-fileutils-test")
+	defer os.RemoveAll(tempFolder)
+	if err != nil {
+		t.Fatal(err)
+	}
+	bytes, err := CopyFile("/invalid/file/path", path.Join(tempFolder, "dest"))
+	if err == nil {
+		t.Fatal("Should have fail to copy an invalid src file")
+	}
+	if bytes != 0 {
+		t.Fatal("Should have written 0 bytes")
+	}
+
+}
+
+// CopyFile with invalid dest
+func TestCopyFileWithInvalidDest(t *testing.T) {
+	tempFolder, err := ioutil.TempDir("", "docker-fileutils-test")
+	defer os.RemoveAll(tempFolder)
+	if err != nil {
+		t.Fatal(err)
+	}
+	src := path.Join(tempFolder, "file")
+	err = ioutil.WriteFile(src, []byte("content"), 0740)
+	if err != nil {
+		t.Fatal(err)
+	}
+	bytes, err := CopyFile(src, path.Join(tempFolder, "/invalid/dest/path"))
+	if err == nil {
+		t.Fatal("Should have fail to copy an invalid src file")
+	}
+	if bytes != 0 {
+		t.Fatal("Should have written 0 bytes")
+	}
+
+}
+
+// CopyFile with same src and dest
+func TestCopyFileWithSameSrcAndDest(t *testing.T) {
+	tempFolder, err := ioutil.TempDir("", "docker-fileutils-test")
+	defer os.RemoveAll(tempFolder)
+	if err != nil {
+		t.Fatal(err)
+	}
+	file := path.Join(tempFolder, "file")
+	err = ioutil.WriteFile(file, []byte("content"), 0740)
+	if err != nil {
+		t.Fatal(err)
+	}
+	bytes, err := CopyFile(file, file)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if bytes != 0 {
+		t.Fatal("Should have written 0 bytes as it is the same file.")
+	}
+}
+
+// CopyFile with same src and dest but path is different and not clean
+func TestCopyFileWithSameSrcAndDestWithPathNameDifferent(t *testing.T) {
+	tempFolder, err := ioutil.TempDir("", "docker-fileutils-test")
+	defer os.RemoveAll(tempFolder)
+	if err != nil {
+		t.Fatal(err)
+	}
+	testFolder := path.Join(tempFolder, "test")
+	err = os.MkdirAll(testFolder, 0740)
+	if err != nil {
+		t.Fatal(err)
+	}
+	file := path.Join(testFolder, "file")
+	sameFile := testFolder + "/../test/file"
+	err = ioutil.WriteFile(file, []byte("content"), 0740)
+	if err != nil {
+		t.Fatal(err)
+	}
+	bytes, err := CopyFile(file, sameFile)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if bytes != 0 {
+		t.Fatal("Should have written 0 bytes as it is the same file.")
+	}
+}
+
+func TestCopyFile(t *testing.T) {
+	tempFolder, err := ioutil.TempDir("", "docker-fileutils-test")
+	defer os.RemoveAll(tempFolder)
+	if err != nil {
+		t.Fatal(err)
+	}
+	src := path.Join(tempFolder, "src")
+	dest := path.Join(tempFolder, "dest")
+	ioutil.WriteFile(src, []byte("content"), 0777)
+	ioutil.WriteFile(dest, []byte("destContent"), 0777)
+	bytes, err := CopyFile(src, dest)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if bytes != 7 {
+		t.Fatalf("Should have written %d bytes but wrote %d", 7, bytes)
+	}
+	actual, err := ioutil.ReadFile(dest)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if string(actual) != "content" {
+		t.Fatalf("Dest content was '%s', expected '%s'", string(actual), "content")
+	}
+}
+
+// Reading a symlink to a directory must return the directory
+func TestReadSymlinkedDirectoryExistingDirectory(t *testing.T) {
+	var err error
+	if err = os.Mkdir("/tmp/testReadSymlinkToExistingDirectory", 0777); err != nil {
+		t.Errorf("failed to create directory: %s", err)
+	}
+
+	if err = os.Symlink("/tmp/testReadSymlinkToExistingDirectory", "/tmp/dirLinkTest"); err != nil {
+		t.Errorf("failed to create symlink: %s", err)
+	}
+
+	var path string
+	if path, err = ReadSymlinkedDirectory("/tmp/dirLinkTest"); err != nil {
+		t.Fatalf("failed to read symlink to directory: %s", err)
+	}
+
+	if path != "/tmp/testReadSymlinkToExistingDirectory" {
+		t.Fatalf("symlink returned unexpected directory: %s", path)
+	}
+
+	if err = os.Remove("/tmp/testReadSymlinkToExistingDirectory"); err != nil {
+		t.Errorf("failed to remove temporary directory: %s", err)
+	}
+
+	if err = os.Remove("/tmp/dirLinkTest"); err != nil {
+		t.Errorf("failed to remove symlink: %s", err)
+	}
+}
+
+// Reading a non-existing symlink must fail
+func TestReadSymlinkedDirectoryNonExistingSymlink(t *testing.T) {
+	var path string
+	var err error
+	if path, err = ReadSymlinkedDirectory("/tmp/test/foo/Non/ExistingPath"); err == nil {
+		t.Fatalf("error expected for non-existing symlink")
+	}
+
+	if path != "" {
+		t.Fatalf("expected empty path, but '%s' was returned", path)
+	}
+}
+
+// Reading a symlink to a file must fail
+func TestReadSymlinkedDirectoryToFile(t *testing.T) {
+	var err error
+	var file *os.File
+
+	if file, err = os.Create("/tmp/testReadSymlinkToFile"); err != nil {
+		t.Fatalf("failed to create file: %s", err)
+	}
+
+	file.Close()
+
+	if err = os.Symlink("/tmp/testReadSymlinkToFile", "/tmp/fileLinkTest"); err != nil {
+		t.Errorf("failed to create symlink: %s", err)
+	}
+
+	var path string
+	if path, err = ReadSymlinkedDirectory("/tmp/fileLinkTest"); err == nil {
+		t.Fatalf("ReadSymlinkedDirectory on a symlink to a file should've failed")
+	}
+
+	if path != "" {
+		t.Fatalf("path should've been empty: %s", path)
+	}
+
+	if err = os.Remove("/tmp/testReadSymlinkToFile"); err != nil {
+		t.Errorf("failed to remove file: %s", err)
+	}
+
+	if err = os.Remove("/tmp/fileLinkTest"); err != nil {
+		t.Errorf("failed to remove symlink: %s", err)
+	}
+}
+
+func TestWildcardMatches(t *testing.T) {
+	match, _ := Matches("fileutils.go", []string{"*"})
+	if match != true {
+		t.Errorf("failed to get a wildcard match, got %v", match)
+	}
+}
+
+// A simple pattern match should return true.
+func TestPatternMatches(t *testing.T) {
+	match, _ := Matches("fileutils.go", []string{"*.go"})
+	if match != true {
+		t.Errorf("failed to get a match, got %v", match)
+	}
+}
+
+// An exclusion followed by an inclusion should return true.
+func TestExclusionPatternMatchesPatternBefore(t *testing.T) {
+	match, _ := Matches("fileutils.go", []string{"!fileutils.go", "*.go"})
+	if match != true {
+		t.Errorf("failed to get true match on exclusion pattern, got %v", match)
+	}
+}
+
+// A folder pattern followed by an exception should return false.
+func TestPatternMatchesFolderExclusions(t *testing.T) {
+	match, _ := Matches("docs/README.md", []string{"docs", "!docs/README.md"})
+	if match != false {
+		t.Errorf("failed to get a false match on exclusion pattern, got %v", match)
+	}
+}
+
+// A folder pattern followed by an exception should return false.
+func TestPatternMatchesFolderWithSlashExclusions(t *testing.T) {
+	match, _ := Matches("docs/README.md", []string{"docs/", "!docs/README.md"})
+	if match != false {
+		t.Errorf("failed to get a false match on exclusion pattern, got %v", match)
+	}
+}
+
+// A folder pattern followed by an exception should return false.
+func TestPatternMatchesFolderWildcardExclusions(t *testing.T) {
+	match, _ := Matches("docs/README.md", []string{"docs/*", "!docs/README.md"})
+	if match != false {
+		t.Errorf("failed to get a false match on exclusion pattern, got %v", match)
+	}
+}
+
+// A pattern followed by an exclusion should return false.
+func TestExclusionPatternMatchesPatternAfter(t *testing.T) {
+	match, _ := Matches("fileutils.go", []string{"*.go", "!fileutils.go"})
+	if match != false {
+		t.Errorf("failed to get false match on exclusion pattern, got %v", match)
+	}
+}
+
+// A filename evaluating to . should return false.
+func TestExclusionPatternMatchesWholeDirectory(t *testing.T) {
+	match, _ := Matches(".", []string{"*.go"})
+	if match != false {
+		t.Errorf("failed to get false match on ., got %v", match)
+	}
+}
+
+// A single ! pattern should return an error.
+func TestSingleExclamationError(t *testing.T) {
+	_, err := Matches("fileutils.go", []string{"!"})
+	if err == nil {
+		t.Errorf("failed to get an error for a single exclamation point, got %v", err)
+	}
+}
+
+// A string preceded with a ! should return true from Exclusion.
+func TestExclusion(t *testing.T) {
+	exclusion := exclusion("!")
+	if !exclusion {
+		t.Errorf("failed to get true for a single !, got %v", exclusion)
+	}
+}
+
+// Matches with no patterns
+func TestMatchesWithNoPatterns(t *testing.T) {
+	matches, err := Matches("/any/path/there", []string{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if matches {
+		t.Fatalf("Should not have match anything")
+	}
+}
+
+// Matches with malformed patterns
+func TestMatchesWithMalformedPatterns(t *testing.T) {
+	matches, err := Matches("/any/path/there", []string{"["})
+	if err == nil {
+		t.Fatal("Should have failed because of a malformed syntax in the pattern")
+	}
+	if matches {
+		t.Fatalf("Should not have match anything")
+	}
+}
+
+// Test lots of variants of patterns & strings
+func TestMatches(t *testing.T) {
+	tests := []struct {
+		pattern string
+		text    string
+		pass    bool
+	}{
+		{"**", "file", true},
+		{"**", "file/", true},
+		{"**/", "file", true}, // weird one
+		{"**/", "file/", true},
+		{"**", "/", true},
+		{"**/", "/", true},
+		{"**", "dir/file", true},
+		{"**/", "dir/file", false},
+		{"**", "dir/file/", true},
+		{"**/", "dir/file/", true},
+		{"**/**", "dir/file", true},
+		{"**/**", "dir/file/", true},
+		{"dir/**", "dir/file", true},
+		{"dir/**", "dir/file/", true},
+		{"dir/**", "dir/dir2/file", true},
+		{"dir/**", "dir/dir2/file/", true},
+		{"**/dir2/*", "dir/dir2/file", true},
+		{"**/dir2/*", "dir/dir2/file/", false},
+		{"**/dir2/**", "dir/dir2/dir3/file", true},
+		{"**/dir2/**", "dir/dir2/dir3/file/", true},
+		{"**file", "file", true},
+		{"**file", "dir/file", true},
+		{"**/file", "dir/file", true},
+		{"**file", "dir/dir/file", true},
+		{"**/file", "dir/dir/file", true},
+		{"**/file*", "dir/dir/file", true},
+		{"**/file*", "dir/dir/file.txt", true},
+		{"**/file*txt", "dir/dir/file.txt", true},
+		{"**/file*.txt", "dir/dir/file.txt", true},
+		{"**/file*.txt*", "dir/dir/file.txt", true},
+		{"**/**/*.txt", "dir/dir/file.txt", true},
+		{"**/**/*.txt2", "dir/dir/file.txt", false},
+		{"**/*.txt", "file.txt", true},
+		{"**/**/*.txt", "file.txt", true},
+		{"a**/*.txt", "a/file.txt", true},
+		{"a**/*.txt", "a/dir/file.txt", true},
+		{"a**/*.txt", "a/dir/dir/file.txt", true},
+		{"a/*.txt", "a/dir/file.txt", false},
+		{"a/*.txt", "a/file.txt", true},
+		{"a/*.txt**", "a/file.txt", true},
+		{"a[b-d]e", "ae", false},
+		{"a[b-d]e", "ace", true},
+		{"a[b-d]e", "aae", false},
+		{"a[^b-d]e", "aze", true},
+		{".*", ".foo", true},
+		{".*", "foo", false},
+		{"abc.def", "abcdef", false},
+		{"abc.def", "abc.def", true},
+		{"abc.def", "abcZdef", false},
+		{"abc?def", "abcZdef", true},
+		{"abc?def", "abcdef", false},
+		{"a\\*b", "a*b", true},
+		{"a\\", "a", false},
+		{"a\\", "a\\", false},
+		{"a\\\\", "a\\", true},
+		{"**/foo/bar", "foo/bar", true},
+		{"**/foo/bar", "dir/foo/bar", true},
+		{"**/foo/bar", "dir/dir2/foo/bar", true},
+		{"abc/**", "abc", false},
+		{"abc/**", "abc/def", true},
+		{"abc/**", "abc/def/ghi", true},
+	}
+
+	for _, test := range tests {
+		res, _ := regexpMatch(test.pattern, test.text)
+		if res != test.pass {
+			t.Fatalf("Failed: %v - res:%v", test, res)
+		}
+	}
+}
+
+// An empty string should return true from Empty.
+func TestEmpty(t *testing.T) {
+	empty := empty("")
+	if !empty {
+		t.Errorf("failed to get true for an empty string, got %v", empty)
+	}
+}
+
+func TestCleanPatterns(t *testing.T) {
+	cleaned, _, _, _ := CleanPatterns([]string{"docs", "config"})
+	if len(cleaned) != 2 {
+		t.Errorf("expected 2 element slice, got %v", len(cleaned))
+	}
+}
+
+func TestCleanPatternsStripEmptyPatterns(t *testing.T) {
+	cleaned, _, _, _ := CleanPatterns([]string{"docs", "config", ""})
+	if len(cleaned) != 2 {
+		t.Errorf("expected 2 element slice, got %v", len(cleaned))
+	}
+}
+
+func TestCleanPatternsExceptionFlag(t *testing.T) {
+	_, _, exceptions, _ := CleanPatterns([]string{"docs", "!docs/README.md"})
+	if !exceptions {
+		t.Errorf("expected exceptions to be true, got %v", exceptions)
+	}
+}
+
+func TestCleanPatternsLeadingSpaceTrimmed(t *testing.T) {
+	_, _, exceptions, _ := CleanPatterns([]string{"docs", "  !docs/README.md"})
+	if !exceptions {
+		t.Errorf("expected exceptions to be true, got %v", exceptions)
+	}
+}
+
+func TestCleanPatternsTrailingSpaceTrimmed(t *testing.T) {
+	_, _, exceptions, _ := CleanPatterns([]string{"docs", "!docs/README.md  "})
+	if !exceptions {
+		t.Errorf("expected exceptions to be true, got %v", exceptions)
+	}
+}
+
+func TestCleanPatternsErrorSingleException(t *testing.T) {
+	_, _, _, err := CleanPatterns([]string{"!"})
+	if err == nil {
+		t.Errorf("expected error on single exclamation point, got %v", err)
+	}
+}
+
+func TestCleanPatternsFolderSplit(t *testing.T) {
+	_, dirs, _, _ := CleanPatterns([]string{"docs/config/CONFIG.md"})
+	if dirs[0][0] != "docs" {
+		t.Errorf("expected first element in dirs slice to be docs, got %v", dirs[0][1])
+	}
+	if dirs[0][1] != "config" {
+		t.Errorf("expected first element in dirs slice to be config, got %v", dirs[0][1])
+	}
+}
+
+func TestCreateIfNotExistsDir(t *testing.T) {
+	tempFolder, err := ioutil.TempDir("", "docker-fileutils-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tempFolder)
+
+	folderToCreate := filepath.Join(tempFolder, "tocreate")
+
+	if err := CreateIfNotExists(folderToCreate, true); err != nil {
+		t.Fatal(err)
+	}
+	fileinfo, err := os.Stat(folderToCreate)
+	if err != nil {
+		t.Fatalf("Should have create a folder, got %v", err)
+	}
+
+	if !fileinfo.IsDir() {
+		t.Fatalf("Should have been a dir, seems it's not")
+	}
+}
+
+func TestCreateIfNotExistsFile(t *testing.T) {
+	tempFolder, err := ioutil.TempDir("", "docker-fileutils-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tempFolder)
+
+	fileToCreate := filepath.Join(tempFolder, "file/to/create")
+
+	if err := CreateIfNotExists(fileToCreate, false); err != nil {
+		t.Fatal(err)
+	}
+	fileinfo, err := os.Stat(fileToCreate)
+	if err != nil {
+		t.Fatalf("Should have create a file, got %v", err)
+	}
+
+	if fileinfo.IsDir() {
+		t.Fatalf("Should have been a file, seems it's not")
+	}
+}
+
+// These matchTests are stolen from go's filepath Match tests.
+type matchTest struct {
+	pattern, s string
+	match      bool
+	err        error
+}
+
+var matchTests = []matchTest{
+	{"abc", "abc", true, nil},
+	{"*", "abc", true, nil},
+	{"*c", "abc", true, nil},
+	{"a*", "a", true, nil},
+	{"a*", "abc", true, nil},
+	{"a*", "ab/c", false, nil},
+	{"a*/b", "abc/b", true, nil},
+	{"a*/b", "a/c/b", false, nil},
+	{"a*b*c*d*e*/f", "axbxcxdxe/f", true, nil},
+	{"a*b*c*d*e*/f", "axbxcxdxexxx/f", true, nil},
+	{"a*b*c*d*e*/f", "axbxcxdxe/xxx/f", false, nil},
+	{"a*b*c*d*e*/f", "axbxcxdxexxx/fff", false, nil},
+	{"a*b?c*x", "abxbbxdbxebxczzx", true, nil},
+	{"a*b?c*x", "abxbbxdbxebxczzy", false, nil},
+	{"ab[c]", "abc", true, nil},
+	{"ab[b-d]", "abc", true, nil},
+	{"ab[e-g]", "abc", false, nil},
+	{"ab[^c]", "abc", false, nil},
+	{"ab[^b-d]", "abc", false, nil},
+	{"ab[^e-g]", "abc", true, nil},
+	{"a\\*b", "a*b", true, nil},
+	{"a\\*b", "ab", false, nil},
+	{"a?b", "a☺b", true, nil},
+	{"a[^a]b", "a☺b", true, nil},
+	{"a???b", "a☺b", false, nil},
+	{"a[^a][^a][^a]b", "a☺b", false, nil},
+	{"[a-ζ]*", "α", true, nil},
+	{"*[a-ζ]", "A", false, nil},
+	{"a?b", "a/b", false, nil},
+	{"a*b", "a/b", false, nil},
+	{"[\\]a]", "]", true, nil},
+	{"[\\-]", "-", true, nil},
+	{"[x\\-]", "x", true, nil},
+	{"[x\\-]", "-", true, nil},
+	{"[x\\-]", "z", false, nil},
+	{"[\\-x]", "x", true, nil},
+	{"[\\-x]", "-", true, nil},
+	{"[\\-x]", "a", false, nil},
+	{"[]a]", "]", false, filepath.ErrBadPattern},
+	{"[-]", "-", false, filepath.ErrBadPattern},
+	{"[x-]", "x", false, filepath.ErrBadPattern},
+	{"[x-]", "-", false, filepath.ErrBadPattern},
+	{"[x-]", "z", false, filepath.ErrBadPattern},
+	{"[-x]", "x", false, filepath.ErrBadPattern},
+	{"[-x]", "-", false, filepath.ErrBadPattern},
+	{"[-x]", "a", false, filepath.ErrBadPattern},
+	{"\\", "a", false, filepath.ErrBadPattern},
+	{"[a-b-c]", "a", false, filepath.ErrBadPattern},
+	{"[", "a", false, filepath.ErrBadPattern},
+	{"[^", "a", false, filepath.ErrBadPattern},
+	{"[^bc", "a", false, filepath.ErrBadPattern},
+	{"a[", "a", false, filepath.ErrBadPattern}, // was nil but IMO its wrong
+	{"a[", "ab", false, filepath.ErrBadPattern},
+	{"*x", "xxx", true, nil},
+}
+
+func errp(e error) string {
+	if e == nil {
+		return "<nil>"
+	}
+	return e.Error()
+}
+
+// TestMatch test's our version of filepath.Match, called regexpMatch.
+func TestMatch(t *testing.T) {
+	for _, tt := range matchTests {
+		pattern := tt.pattern
+		s := tt.s
+		if runtime.GOOS == "windows" {
+			if strings.Index(pattern, "\\") >= 0 {
+				// no escape allowed on windows.
+				continue
+			}
+			pattern = filepath.Clean(pattern)
+			s = filepath.Clean(s)
+		}
+		ok, err := regexpMatch(pattern, s)
+		if ok != tt.match || err != tt.err {
+			t.Fatalf("Match(%#q, %#q) = %v, %q want %v, %q", pattern, s, ok, errp(err), tt.match, errp(tt.err))
+		}
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/fileutils/fileutils_unix.go

@@ -0,0 +1,22 @@
+// +build linux freebsd
+
+package fileutils
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/Sirupsen/logrus"
+)
+
+// GetTotalUsedFds Returns the number of used File Descriptors by
+// reading it via /proc filesystem.
+func GetTotalUsedFds() int {
+	if fds, err := ioutil.ReadDir(fmt.Sprintf("/proc/%d/fd", os.Getpid())); err != nil {
+		logrus.Errorf("Error opening /proc/%d/fd: %s", os.Getpid(), err)
+	} else {
+		return len(fds)
+	}
+	return -1
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/fileutils/fileutils_windows.go

@@ -0,0 +1,7 @@
+package fileutils
+
+// GetTotalUsedFds Returns the number of used File Descriptors. Not supported
+// on Windows.
+func GetTotalUsedFds() int {
+	return -1
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/idtools/idtools.go

@@ -0,0 +1,195 @@
+package idtools
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+// IDMap contains a single entry for user namespace range remapping. An array
+// of IDMap entries represents the structure that will be provided to the Linux
+// kernel for creating a user namespace.
+type IDMap struct {
+	ContainerID int `json:"container_id"`
+	HostID      int `json:"host_id"`
+	Size        int `json:"size"`
+}
+
+type subIDRange struct {
+	Start  int
+	Length int
+}
+
+type ranges []subIDRange
+
+func (e ranges) Len() int           { return len(e) }
+func (e ranges) Swap(i, j int)      { e[i], e[j] = e[j], e[i] }
+func (e ranges) Less(i, j int) bool { return e[i].Start < e[j].Start }
+
+const (
+	subuidFileName string = "/etc/subuid"
+	subgidFileName string = "/etc/subgid"
+)
+
+// MkdirAllAs creates a directory (include any along the path) and then modifies
+// ownership to the requested uid/gid.  If the directory already exists, this
+// function will still change ownership to the requested uid/gid pair.
+func MkdirAllAs(path string, mode os.FileMode, ownerUID, ownerGID int) error {
+	return mkdirAs(path, mode, ownerUID, ownerGID, true, true)
+}
+
+// MkdirAllNewAs creates a directory (include any along the path) and then modifies
+// ownership ONLY of newly created directories to the requested uid/gid. If the
+// directories along the path exist, no change of ownership will be performed
+func MkdirAllNewAs(path string, mode os.FileMode, ownerUID, ownerGID int) error {
+	return mkdirAs(path, mode, ownerUID, ownerGID, true, false)
+}
+
+// MkdirAs creates a directory and then modifies ownership to the requested uid/gid.
+// If the directory already exists, this function still changes ownership
+func MkdirAs(path string, mode os.FileMode, ownerUID, ownerGID int) error {
+	return mkdirAs(path, mode, ownerUID, ownerGID, false, true)
+}
+
+// GetRootUIDGID retrieves the remapped root uid/gid pair from the set of maps.
+// If the maps are empty, then the root uid/gid will default to "real" 0/0
+func GetRootUIDGID(uidMap, gidMap []IDMap) (int, int, error) {
+	var uid, gid int
+
+	if uidMap != nil {
+		xUID, err := ToHost(0, uidMap)
+		if err != nil {
+			return -1, -1, err
+		}
+		uid = xUID
+	}
+	if gidMap != nil {
+		xGID, err := ToHost(0, gidMap)
+		if err != nil {
+			return -1, -1, err
+		}
+		gid = xGID
+	}
+	return uid, gid, nil
+}
+
+// ToContainer takes an id mapping, and uses it to translate a
+// host ID to the remapped ID. If no map is provided, then the translation
+// assumes a 1-to-1 mapping and returns the passed in id
+func ToContainer(hostID int, idMap []IDMap) (int, error) {
+	if idMap == nil {
+		return hostID, nil
+	}
+	for _, m := range idMap {
+		if (hostID >= m.HostID) && (hostID <= (m.HostID + m.Size - 1)) {
+			contID := m.ContainerID + (hostID - m.HostID)
+			return contID, nil
+		}
+	}
+	return -1, fmt.Errorf("Host ID %d cannot be mapped to a container ID", hostID)
+}
+
+// ToHost takes an id mapping and a remapped ID, and translates the
+// ID to the mapped host ID. If no map is provided, then the translation
+// assumes a 1-to-1 mapping and returns the passed in id #
+func ToHost(contID int, idMap []IDMap) (int, error) {
+	if idMap == nil {
+		return contID, nil
+	}
+	for _, m := range idMap {
+		if (contID >= m.ContainerID) && (contID <= (m.ContainerID + m.Size - 1)) {
+			hostID := m.HostID + (contID - m.ContainerID)
+			return hostID, nil
+		}
+	}
+	return -1, fmt.Errorf("Container ID %d cannot be mapped to a host ID", contID)
+}
+
+// CreateIDMappings takes a requested user and group name and
+// using the data from /etc/sub{uid,gid} ranges, creates the
+// proper uid and gid remapping ranges for that user/group pair
+func CreateIDMappings(username, groupname string) ([]IDMap, []IDMap, error) {
+	subuidRanges, err := parseSubuid(username)
+	if err != nil {
+		return nil, nil, err
+	}
+	subgidRanges, err := parseSubgid(groupname)
+	if err != nil {
+		return nil, nil, err
+	}
+	if len(subuidRanges) == 0 {
+		return nil, nil, fmt.Errorf("No subuid ranges found for user %q", username)
+	}
+	if len(subgidRanges) == 0 {
+		return nil, nil, fmt.Errorf("No subgid ranges found for group %q", groupname)
+	}
+
+	return createIDMap(subuidRanges), createIDMap(subgidRanges), nil
+}
+
+func createIDMap(subidRanges ranges) []IDMap {
+	idMap := []IDMap{}
+
+	// sort the ranges by lowest ID first
+	sort.Sort(subidRanges)
+	containerID := 0
+	for _, idrange := range subidRanges {
+		idMap = append(idMap, IDMap{
+			ContainerID: containerID,
+			HostID:      idrange.Start,
+			Size:        idrange.Length,
+		})
+		containerID = containerID + idrange.Length
+	}
+	return idMap
+}
+
+func parseSubuid(username string) (ranges, error) {
+	return parseSubidFile(subuidFileName, username)
+}
+
+func parseSubgid(username string) (ranges, error) {
+	return parseSubidFile(subgidFileName, username)
+}
+
+func parseSubidFile(path, username string) (ranges, error) {
+	var rangeList ranges
+
+	subidFile, err := os.Open(path)
+	if err != nil {
+		return rangeList, err
+	}
+	defer subidFile.Close()
+
+	s := bufio.NewScanner(subidFile)
+	for s.Scan() {
+		if err := s.Err(); err != nil {
+			return rangeList, err
+		}
+
+		text := strings.TrimSpace(s.Text())
+		if text == "" {
+			continue
+		}
+		parts := strings.Split(text, ":")
+		if len(parts) != 3 {
+			return rangeList, fmt.Errorf("Cannot parse subuid/gid information: Format not correct for %s file", path)
+		}
+		if parts[0] == username {
+			// return the first entry for a user; ignores potential for multiple ranges per user
+			startid, err := strconv.Atoi(parts[1])
+			if err != nil {
+				return rangeList, fmt.Errorf("String to int conversion failed during subuid/gid parsing of %s: %v", path, err)
+			}
+			length, err := strconv.Atoi(parts[2])
+			if err != nil {
+				return rangeList, fmt.Errorf("String to int conversion failed during subuid/gid parsing of %s: %v", path, err)
+			}
+			rangeList = append(rangeList, subIDRange{startid, length})
+		}
+	}
+	return rangeList, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/idtools/idtools_unix.go

@@ -0,0 +1,60 @@
+// +build !windows
+
+package idtools
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/docker/docker/pkg/system"
+)
+
+func mkdirAs(path string, mode os.FileMode, ownerUID, ownerGID int, mkAll, chownExisting bool) error {
+	// make an array containing the original path asked for, plus (for mkAll == true)
+	// all path components leading up to the complete path that don't exist before we MkdirAll
+	// so that we can chown all of them properly at the end.  If chownExisting is false, we won't
+	// chown the full directory path if it exists
+	var paths []string
+	if _, err := os.Stat(path); err != nil && os.IsNotExist(err) {
+		paths = []string{path}
+	} else if err == nil && chownExisting {
+		if err := os.Chown(path, ownerUID, ownerGID); err != nil {
+			return err
+		}
+		// short-circuit--we were called with an existing directory and chown was requested
+		return nil
+	} else if err == nil {
+		// nothing to do; directory path fully exists already and chown was NOT requested
+		return nil
+	}
+
+	if mkAll {
+		// walk back to "/" looking for directories which do not exist
+		// and add them to the paths array for chown after creation
+		dirPath := path
+		for {
+			dirPath = filepath.Dir(dirPath)
+			if dirPath == "/" {
+				break
+			}
+			if _, err := os.Stat(dirPath); err != nil && os.IsNotExist(err) {
+				paths = append(paths, dirPath)
+			}
+		}
+		if err := system.MkdirAll(path, mode); err != nil && !os.IsExist(err) {
+			return err
+		}
+	} else {
+		if err := os.Mkdir(path, mode); err != nil && !os.IsExist(err) {
+			return err
+		}
+	}
+	// even if it existed, we will chown the requested path + any subpaths that
+	// didn't exist when we called MkdirAll
+	for _, pathComponent := range paths {
+		if err := os.Chown(pathComponent, ownerUID, ownerGID); err != nil {
+			return err
+		}
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/idtools/idtools_unix_test.go

@@ -0,0 +1,243 @@
+// +build !windows
+
+package idtools
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"syscall"
+	"testing"
+)
+
+type node struct {
+	uid int
+	gid int
+}
+
+func TestMkdirAllAs(t *testing.T) {
+	dirName, err := ioutil.TempDir("", "mkdirall")
+	if err != nil {
+		t.Fatalf("Couldn't create temp dir: %v", err)
+	}
+	defer os.RemoveAll(dirName)
+
+	testTree := map[string]node{
+		"usr":              {0, 0},
+		"usr/bin":          {0, 0},
+		"lib":              {33, 33},
+		"lib/x86_64":       {45, 45},
+		"lib/x86_64/share": {1, 1},
+	}
+
+	if err := buildTree(dirName, testTree); err != nil {
+		t.Fatal(err)
+	}
+
+	// test adding a directory to a pre-existing dir; only the new dir is owned by the uid/gid
+	if err := MkdirAllAs(filepath.Join(dirName, "usr", "share"), 0755, 99, 99); err != nil {
+		t.Fatal(err)
+	}
+	testTree["usr/share"] = node{99, 99}
+	verifyTree, err := readTree(dirName, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := compareTrees(testTree, verifyTree); err != nil {
+		t.Fatal(err)
+	}
+
+	// test 2-deep new directories--both should be owned by the uid/gid pair
+	if err := MkdirAllAs(filepath.Join(dirName, "lib", "some", "other"), 0755, 101, 101); err != nil {
+		t.Fatal(err)
+	}
+	testTree["lib/some"] = node{101, 101}
+	testTree["lib/some/other"] = node{101, 101}
+	verifyTree, err = readTree(dirName, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := compareTrees(testTree, verifyTree); err != nil {
+		t.Fatal(err)
+	}
+
+	// test a directory that already exists; should be chowned, but nothing else
+	if err := MkdirAllAs(filepath.Join(dirName, "usr"), 0755, 102, 102); err != nil {
+		t.Fatal(err)
+	}
+	testTree["usr"] = node{102, 102}
+	verifyTree, err = readTree(dirName, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := compareTrees(testTree, verifyTree); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestMkdirAllNewAs(t *testing.T) {
+
+	dirName, err := ioutil.TempDir("", "mkdirnew")
+	if err != nil {
+		t.Fatalf("Couldn't create temp dir: %v", err)
+	}
+	defer os.RemoveAll(dirName)
+
+	testTree := map[string]node{
+		"usr":              {0, 0},
+		"usr/bin":          {0, 0},
+		"lib":              {33, 33},
+		"lib/x86_64":       {45, 45},
+		"lib/x86_64/share": {1, 1},
+	}
+
+	if err := buildTree(dirName, testTree); err != nil {
+		t.Fatal(err)
+	}
+
+	// test adding a directory to a pre-existing dir; only the new dir is owned by the uid/gid
+	if err := MkdirAllNewAs(filepath.Join(dirName, "usr", "share"), 0755, 99, 99); err != nil {
+		t.Fatal(err)
+	}
+	testTree["usr/share"] = node{99, 99}
+	verifyTree, err := readTree(dirName, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := compareTrees(testTree, verifyTree); err != nil {
+		t.Fatal(err)
+	}
+
+	// test 2-deep new directories--both should be owned by the uid/gid pair
+	if err := MkdirAllNewAs(filepath.Join(dirName, "lib", "some", "other"), 0755, 101, 101); err != nil {
+		t.Fatal(err)
+	}
+	testTree["lib/some"] = node{101, 101}
+	testTree["lib/some/other"] = node{101, 101}
+	verifyTree, err = readTree(dirName, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := compareTrees(testTree, verifyTree); err != nil {
+		t.Fatal(err)
+	}
+
+	// test a directory that already exists; should NOT be chowned
+	if err := MkdirAllNewAs(filepath.Join(dirName, "usr"), 0755, 102, 102); err != nil {
+		t.Fatal(err)
+	}
+	verifyTree, err = readTree(dirName, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := compareTrees(testTree, verifyTree); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestMkdirAs(t *testing.T) {
+
+	dirName, err := ioutil.TempDir("", "mkdir")
+	if err != nil {
+		t.Fatalf("Couldn't create temp dir: %v", err)
+	}
+	defer os.RemoveAll(dirName)
+
+	testTree := map[string]node{
+		"usr": {0, 0},
+	}
+	if err := buildTree(dirName, testTree); err != nil {
+		t.Fatal(err)
+	}
+
+	// test a directory that already exists; should just chown to the requested uid/gid
+	if err := MkdirAs(filepath.Join(dirName, "usr"), 0755, 99, 99); err != nil {
+		t.Fatal(err)
+	}
+	testTree["usr"] = node{99, 99}
+	verifyTree, err := readTree(dirName, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := compareTrees(testTree, verifyTree); err != nil {
+		t.Fatal(err)
+	}
+
+	// create a subdir under a dir which doesn't exist--should fail
+	if err := MkdirAs(filepath.Join(dirName, "usr", "bin", "subdir"), 0755, 102, 102); err == nil {
+		t.Fatalf("Trying to create a directory with Mkdir where the parent doesn't exist should have failed")
+	}
+
+	// create a subdir under an existing dir; should only change the ownership of the new subdir
+	if err := MkdirAs(filepath.Join(dirName, "usr", "bin"), 0755, 102, 102); err != nil {
+		t.Fatal(err)
+	}
+	testTree["usr/bin"] = node{102, 102}
+	verifyTree, err = readTree(dirName, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := compareTrees(testTree, verifyTree); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func buildTree(base string, tree map[string]node) error {
+	for path, node := range tree {
+		fullPath := filepath.Join(base, path)
+		if err := os.MkdirAll(fullPath, 0755); err != nil {
+			return fmt.Errorf("Couldn't create path: %s; error: %v", fullPath, err)
+		}
+		if err := os.Chown(fullPath, node.uid, node.gid); err != nil {
+			return fmt.Errorf("Couldn't chown path: %s; error: %v", fullPath, err)
+		}
+	}
+	return nil
+}
+
+func readTree(base, root string) (map[string]node, error) {
+	tree := make(map[string]node)
+
+	dirInfos, err := ioutil.ReadDir(base)
+	if err != nil {
+		return nil, fmt.Errorf("Couldn't read directory entries for %q: %v", base, err)
+	}
+
+	for _, info := range dirInfos {
+		s := &syscall.Stat_t{}
+		if err := syscall.Stat(filepath.Join(base, info.Name()), s); err != nil {
+			return nil, fmt.Errorf("Can't stat file %q: %v", filepath.Join(base, info.Name()), err)
+		}
+		tree[filepath.Join(root, info.Name())] = node{int(s.Uid), int(s.Gid)}
+		if info.IsDir() {
+			// read the subdirectory
+			subtree, err := readTree(filepath.Join(base, info.Name()), filepath.Join(root, info.Name()))
+			if err != nil {
+				return nil, err
+			}
+			for path, nodeinfo := range subtree {
+				tree[path] = nodeinfo
+			}
+		}
+	}
+	return tree, nil
+}
+
+func compareTrees(left, right map[string]node) error {
+	if len(left) != len(right) {
+		return fmt.Errorf("Trees aren't the same size")
+	}
+	for path, nodeLeft := range left {
+		if nodeRight, ok := right[path]; ok {
+			if nodeRight.uid != nodeLeft.uid || nodeRight.gid != nodeLeft.gid {
+				// mismatch
+				return fmt.Errorf("mismatched ownership for %q: expected: %d:%d, got: %d:%d", path,
+					nodeLeft.uid, nodeLeft.gid, nodeRight.uid, nodeRight.gid)
+			}
+			continue
+		}
+		return fmt.Errorf("right tree didn't contain path %q", path)
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/idtools/idtools_windows.go

@@ -0,0 +1,18 @@
+// +build windows
+
+package idtools
+
+import (
+	"os"
+
+	"github.com/docker/docker/pkg/system"
+)
+
+// Platforms such as Windows do not support the UID/GID concept. So make this
+// just a wrapper around system.MkdirAll.
+func mkdirAs(path string, mode os.FileMode, ownerUID, ownerGID int, mkAll, chownExisting bool) error {
+	if err := system.MkdirAll(path, mode); err != nil && !os.IsExist(err) {
+		return err
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/idtools/usergroupadd_linux.go

@@ -0,0 +1,155 @@
+package idtools
+
+import (
+	"fmt"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"syscall"
+)
+
+// add a user and/or group to Linux /etc/passwd, /etc/group using standard
+// Linux distribution commands:
+// adduser --uid <id> --shell /bin/login --no-create-home --disabled-login --ingroup <groupname> <username>
+// useradd -M -u <id> -s /bin/nologin -N -g <groupname> <username>
+// addgroup --gid <id> <groupname>
+// groupadd -g <id> <groupname>
+
+const baseUID int = 10000
+const baseGID int = 10000
+const idMAX int = 65534
+
+var (
+	userCommand  string
+	groupCommand string
+
+	cmdTemplates = map[string]string{
+		"adduser":  "--uid %d --shell /bin/false --no-create-home --disabled-login --ingroup %s %s",
+		"useradd":  "-M -u %d -s /bin/false -N -g %s %s",
+		"addgroup": "--gid %d %s",
+		"groupadd": "-g %d %s",
+	}
+)
+
+func init() {
+	// set up which commands are used for adding users/groups dependent on distro
+	if _, err := resolveBinary("adduser"); err == nil {
+		userCommand = "adduser"
+	} else if _, err := resolveBinary("useradd"); err == nil {
+		userCommand = "useradd"
+	}
+	if _, err := resolveBinary("addgroup"); err == nil {
+		groupCommand = "addgroup"
+	} else if _, err := resolveBinary("groupadd"); err == nil {
+		groupCommand = "groupadd"
+	}
+}
+
+func resolveBinary(binname string) (string, error) {
+	binaryPath, err := exec.LookPath(binname)
+	if err != nil {
+		return "", err
+	}
+	resolvedPath, err := filepath.EvalSymlinks(binaryPath)
+	if err != nil {
+		return "", err
+	}
+	//only return no error if the final resolved binary basename
+	//matches what was searched for
+	if filepath.Base(resolvedPath) == binname {
+		return resolvedPath, nil
+	}
+	return "", fmt.Errorf("Binary %q does not resolve to a binary of that name in $PATH (%q)", binname, resolvedPath)
+}
+
+// AddNamespaceRangesUser takes a name and finds an unused uid, gid pair
+// and calls the appropriate helper function to add the group and then
+// the user to the group in /etc/group and /etc/passwd respectively.
+// This new user's /etc/sub{uid,gid} ranges will be used for user namespace
+// mapping ranges in containers.
+func AddNamespaceRangesUser(name string) (int, int, error) {
+	// Find unused uid, gid pair
+	uid, err := findUnusedUID(baseUID)
+	if err != nil {
+		return -1, -1, fmt.Errorf("Unable to find unused UID: %v", err)
+	}
+	gid, err := findUnusedGID(baseGID)
+	if err != nil {
+		return -1, -1, fmt.Errorf("Unable to find unused GID: %v", err)
+	}
+
+	// First add the group that we will use
+	if err := addGroup(name, gid); err != nil {
+		return -1, -1, fmt.Errorf("Error adding group %q: %v", name, err)
+	}
+	// Add the user as a member of the group
+	if err := addUser(name, uid, name); err != nil {
+		return -1, -1, fmt.Errorf("Error adding user %q: %v", name, err)
+	}
+	return uid, gid, nil
+}
+
+func addUser(userName string, uid int, groupName string) error {
+
+	if userCommand == "" {
+		return fmt.Errorf("Cannot add user; no useradd/adduser binary found")
+	}
+	args := fmt.Sprintf(cmdTemplates[userCommand], uid, groupName, userName)
+	return execAddCmd(userCommand, args)
+}
+
+func addGroup(groupName string, gid int) error {
+
+	if groupCommand == "" {
+		return fmt.Errorf("Cannot add group; no groupadd/addgroup binary found")
+	}
+	args := fmt.Sprintf(cmdTemplates[groupCommand], gid, groupName)
+	// only error out if the error isn't that the group already exists
+	// if the group exists then our needs are already met
+	if err := execAddCmd(groupCommand, args); err != nil && !strings.Contains(err.Error(), "already exists") {
+		return err
+	}
+	return nil
+}
+
+func execAddCmd(cmd, args string) error {
+	execCmd := exec.Command(cmd, strings.Split(args, " ")...)
+	out, err := execCmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("Failed to add user/group with error: %v; output: %q", err, string(out))
+	}
+	return nil
+}
+
+func findUnusedUID(startUID int) (int, error) {
+	return findUnused("passwd", startUID)
+}
+
+func findUnusedGID(startGID int) (int, error) {
+	return findUnused("group", startGID)
+}
+
+func findUnused(file string, id int) (int, error) {
+	for {
+		cmdStr := fmt.Sprintf("cat /etc/%s | cut -d: -f3 | grep '^%d$'", file, id)
+		cmd := exec.Command("sh", "-c", cmdStr)
+		if err := cmd.Run(); err != nil {
+			// if a non-zero return code occurs, then we know the ID was not found
+			// and is usable
+			if exiterr, ok := err.(*exec.ExitError); ok {
+				// The program has exited with an exit code != 0
+				if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
+					if status.ExitStatus() == 1 {
+						//no match, we can use this ID
+						return id, nil
+					}
+				}
+			}
+			return -1, fmt.Errorf("Error looking in /etc/%s for unused ID: %v", file, err)
+		}
+		id++
+		if id > idMAX {
+			return -1, fmt.Errorf("Maximum id in %q reached with finding unused numeric ID", file)
+		}
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/idtools/usergroupadd_unsupported.go

@@ -0,0 +1,12 @@
+// +build !linux
+
+package idtools
+
+import "fmt"
+
+// AddNamespaceRangesUser takes a name and finds an unused uid, gid pair
+// and calls the appropriate helper function to add the group and then
+// the user to the group in /etc/group and /etc/passwd respectively.
+func AddNamespaceRangesUser(name string) (int, int, error) {
+	return -1, -1, fmt.Errorf("No support for adding users or groups on this OS")
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/bytespipe.go

@@ -0,0 +1,152 @@
+package ioutils
+
+import (
+	"errors"
+	"io"
+	"sync"
+)
+
+// maxCap is the highest capacity to use in byte slices that buffer data.
+const maxCap = 1e6
+
+// blockThreshold is the minimum number of bytes in the buffer which will cause
+// a write to BytesPipe to block when allocating a new slice.
+const blockThreshold = 1e6
+
+// ErrClosed is returned when Write is called on a closed BytesPipe.
+var ErrClosed = errors.New("write to closed BytesPipe")
+
+// BytesPipe is io.ReadWriteCloser which works similarly to pipe(queue).
+// All written data may be read at most once. Also, BytesPipe allocates
+// and releases new byte slices to adjust to current needs, so the buffer
+// won't be overgrown after peak loads.
+type BytesPipe struct {
+	mu       sync.Mutex
+	wait     *sync.Cond
+	buf      [][]byte // slice of byte-slices of buffered data
+	lastRead int      // index in the first slice to a read point
+	bufLen   int      // length of data buffered over the slices
+	closeErr error    // error to return from next Read. set to nil if not closed.
+}
+
+// NewBytesPipe creates new BytesPipe, initialized by specified slice.
+// If buf is nil, then it will be initialized with slice which cap is 64.
+// buf will be adjusted in a way that len(buf) == 0, cap(buf) == cap(buf).
+func NewBytesPipe(buf []byte) *BytesPipe {
+	if cap(buf) == 0 {
+		buf = make([]byte, 0, 64)
+	}
+	bp := &BytesPipe{
+		buf: [][]byte{buf[:0]},
+	}
+	bp.wait = sync.NewCond(&bp.mu)
+	return bp
+}
+
+// Write writes p to BytesPipe.
+// It can allocate new []byte slices in a process of writing.
+func (bp *BytesPipe) Write(p []byte) (int, error) {
+	bp.mu.Lock()
+	defer bp.mu.Unlock()
+	written := 0
+	for {
+		if bp.closeErr != nil {
+			return written, ErrClosed
+		}
+		// write data to the last buffer
+		b := bp.buf[len(bp.buf)-1]
+		// copy data to the current empty allocated area
+		n := copy(b[len(b):cap(b)], p)
+		// increment buffered data length
+		bp.bufLen += n
+		// include written data in last buffer
+		bp.buf[len(bp.buf)-1] = b[:len(b)+n]
+
+		written += n
+
+		// if there was enough room to write all then break
+		if len(p) == n {
+			break
+		}
+
+		// more data: write to the next slice
+		p = p[n:]
+
+		// block if too much data is still in the buffer
+		for bp.bufLen >= blockThreshold {
+			bp.wait.Wait()
+		}
+
+		// allocate slice that has twice the size of the last unless maximum reached
+		nextCap := 2 * cap(bp.buf[len(bp.buf)-1])
+		if nextCap > maxCap {
+			nextCap = maxCap
+		}
+		// add new byte slice to the buffers slice and continue writing
+		bp.buf = append(bp.buf, make([]byte, 0, nextCap))
+	}
+	bp.wait.Broadcast()
+	return written, nil
+}
+
+// CloseWithError causes further reads from a BytesPipe to return immediately.
+func (bp *BytesPipe) CloseWithError(err error) error {
+	bp.mu.Lock()
+	if err != nil {
+		bp.closeErr = err
+	} else {
+		bp.closeErr = io.EOF
+	}
+	bp.wait.Broadcast()
+	bp.mu.Unlock()
+	return nil
+}
+
+// Close causes further reads from a BytesPipe to return immediately.
+func (bp *BytesPipe) Close() error {
+	return bp.CloseWithError(nil)
+}
+
+func (bp *BytesPipe) len() int {
+	return bp.bufLen - bp.lastRead
+}
+
+// Read reads bytes from BytesPipe.
+// Data could be read only once.
+func (bp *BytesPipe) Read(p []byte) (n int, err error) {
+	bp.mu.Lock()
+	defer bp.mu.Unlock()
+	if bp.len() == 0 {
+		if bp.closeErr != nil {
+			return 0, bp.closeErr
+		}
+		bp.wait.Wait()
+		if bp.len() == 0 && bp.closeErr != nil {
+			return 0, bp.closeErr
+		}
+	}
+	for {
+		read := copy(p, bp.buf[0][bp.lastRead:])
+		n += read
+		bp.lastRead += read
+		if bp.len() == 0 {
+			// we have read everything. reset to the beginning.
+			bp.lastRead = 0
+			bp.bufLen -= len(bp.buf[0])
+			bp.buf[0] = bp.buf[0][:0]
+			break
+		}
+		// break if everything was read
+		if len(p) == read {
+			break
+		}
+		// more buffered data and more asked. read from next slice.
+		p = p[read:]
+		bp.lastRead = 0
+		bp.bufLen -= len(bp.buf[0])
+		bp.buf[0] = nil     // throw away old slice
+		bp.buf = bp.buf[1:] // switch to next
+	}
+	bp.wait.Broadcast()
+	return
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/bytespipe_test.go

@@ -0,0 +1,158 @@
+package ioutils
+
+import (
+	"crypto/sha1"
+	"encoding/hex"
+	"math/rand"
+	"testing"
+	"time"
+)
+
+func TestBytesPipeRead(t *testing.T) {
+	buf := NewBytesPipe(nil)
+	buf.Write([]byte("12"))
+	buf.Write([]byte("34"))
+	buf.Write([]byte("56"))
+	buf.Write([]byte("78"))
+	buf.Write([]byte("90"))
+	rd := make([]byte, 4)
+	n, err := buf.Read(rd)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != 4 {
+		t.Fatalf("Wrong number of bytes read: %d, should be %d", n, 4)
+	}
+	if string(rd) != "1234" {
+		t.Fatalf("Read %s, but must be %s", rd, "1234")
+	}
+	n, err = buf.Read(rd)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != 4 {
+		t.Fatalf("Wrong number of bytes read: %d, should be %d", n, 4)
+	}
+	if string(rd) != "5678" {
+		t.Fatalf("Read %s, but must be %s", rd, "5679")
+	}
+	n, err = buf.Read(rd)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != 2 {
+		t.Fatalf("Wrong number of bytes read: %d, should be %d", n, 2)
+	}
+	if string(rd[:n]) != "90" {
+		t.Fatalf("Read %s, but must be %s", rd, "90")
+	}
+}
+
+func TestBytesPipeWrite(t *testing.T) {
+	buf := NewBytesPipe(nil)
+	buf.Write([]byte("12"))
+	buf.Write([]byte("34"))
+	buf.Write([]byte("56"))
+	buf.Write([]byte("78"))
+	buf.Write([]byte("90"))
+	if string(buf.buf[0]) != "1234567890" {
+		t.Fatalf("Buffer %s, must be %s", buf.buf, "1234567890")
+	}
+}
+
+// Write and read in different speeds/chunk sizes and check valid data is read.
+func TestBytesPipeWriteRandomChunks(t *testing.T) {
+	cases := []struct{ iterations, writesPerLoop, readsPerLoop int }{
+		{100, 10, 1},
+		{1000, 10, 5},
+		{1000, 100, 0},
+		{1000, 5, 6},
+		{10000, 50, 25},
+	}
+
+	testMessage := []byte("this is a random string for testing")
+	// random slice sizes to read and write
+	writeChunks := []int{25, 35, 15, 20}
+	readChunks := []int{5, 45, 20, 25}
+
+	for _, c := range cases {
+		// first pass: write directly to hash
+		hash := sha1.New()
+		for i := 0; i < c.iterations*c.writesPerLoop; i++ {
+			if _, err := hash.Write(testMessage[:writeChunks[i%len(writeChunks)]]); err != nil {
+				t.Fatal(err)
+			}
+		}
+		expected := hex.EncodeToString(hash.Sum(nil))
+
+		// write/read through buffer
+		buf := NewBytesPipe(nil)
+		hash.Reset()
+
+		done := make(chan struct{})
+
+		go func() {
+			// random delay before read starts
+			<-time.After(time.Duration(rand.Intn(10)) * time.Millisecond)
+			for i := 0; ; i++ {
+				p := make([]byte, readChunks[(c.iterations*c.readsPerLoop+i)%len(readChunks)])
+				n, _ := buf.Read(p)
+				if n == 0 {
+					break
+				}
+				hash.Write(p[:n])
+			}
+
+			close(done)
+		}()
+
+		for i := 0; i < c.iterations; i++ {
+			for w := 0; w < c.writesPerLoop; w++ {
+				buf.Write(testMessage[:writeChunks[(i*c.writesPerLoop+w)%len(writeChunks)]])
+			}
+		}
+		buf.Close()
+		<-done
+
+		actual := hex.EncodeToString(hash.Sum(nil))
+
+		if expected != actual {
+			t.Fatalf("BytesPipe returned invalid data. Expected checksum %v, got %v", expected, actual)
+		}
+
+	}
+}
+
+func BenchmarkBytesPipeWrite(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		readBuf := make([]byte, 1024)
+		buf := NewBytesPipe(nil)
+		go func() {
+			var err error
+			for err == nil {
+				_, err = buf.Read(readBuf)
+			}
+		}()
+		for j := 0; j < 1000; j++ {
+			buf.Write([]byte("pretty short line, because why not?"))
+		}
+		buf.Close()
+	}
+}
+
+func BenchmarkBytesPipeRead(b *testing.B) {
+	rd := make([]byte, 512)
+	for i := 0; i < b.N; i++ {
+		b.StopTimer()
+		buf := NewBytesPipe(nil)
+		for j := 0; j < 500; j++ {
+			buf.Write(make([]byte, 1024))
+		}
+		b.StartTimer()
+		for j := 0; j < 1000; j++ {
+			if n, _ := buf.Read(rd); n != 512 {
+				b.Fatalf("Wrong number of bytes: %d", n)
+			}
+		}
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/fmt.go

@@ -0,0 +1,22 @@
+package ioutils
+
+import (
+	"fmt"
+	"io"
+)
+
+// FprintfIfNotEmpty prints the string value if it's not empty
+func FprintfIfNotEmpty(w io.Writer, format, value string) (int, error) {
+	if value != "" {
+		return fmt.Fprintf(w, format, value)
+	}
+	return 0, nil
+}
+
+// FprintfIfTrue prints the boolean value if it's true
+func FprintfIfTrue(w io.Writer, format string, ok bool) (int, error) {
+	if ok {
+		return fmt.Fprintf(w, format, ok)
+	}
+	return 0, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/fmt_test.go

@@ -0,0 +1,17 @@
+package ioutils
+
+import "testing"
+
+func TestFprintfIfNotEmpty(t *testing.T) {
+	wc := NewWriteCounter(&NopWriter{})
+	n, _ := FprintfIfNotEmpty(wc, "foo%s", "")
+
+	if wc.Count != 0 || n != 0 {
+		t.Errorf("Wrong count: %v vs. %v vs. 0", wc.Count, n)
+	}
+
+	n, _ = FprintfIfNotEmpty(wc, "foo%s", "bar")
+	if wc.Count != 6 || n != 6 {
+		t.Errorf("Wrong count: %v vs. %v vs. 6", wc.Count, n)
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/multireader.go

@@ -0,0 +1,226 @@
+package ioutils
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+)
+
+type pos struct {
+	idx    int
+	offset int64
+}
+
+type multiReadSeeker struct {
+	readers []io.ReadSeeker
+	pos     *pos
+	posIdx  map[io.ReadSeeker]int
+}
+
+func (r *multiReadSeeker) Seek(offset int64, whence int) (int64, error) {
+	var tmpOffset int64
+	switch whence {
+	case os.SEEK_SET:
+		for i, rdr := range r.readers {
+			// get size of the current reader
+			s, err := rdr.Seek(0, os.SEEK_END)
+			if err != nil {
+				return -1, err
+			}
+
+			if offset > tmpOffset+s {
+				if i == len(r.readers)-1 {
+					rdrOffset := s + (offset - tmpOffset)
+					if _, err := rdr.Seek(rdrOffset, os.SEEK_SET); err != nil {
+						return -1, err
+					}
+					r.pos = &pos{i, rdrOffset}
+					return offset, nil
+				}
+
+				tmpOffset += s
+				continue
+			}
+
+			rdrOffset := offset - tmpOffset
+			idx := i
+
+			rdr.Seek(rdrOffset, os.SEEK_SET)
+			// make sure all following readers are at 0
+			for _, rdr := range r.readers[i+1:] {
+				rdr.Seek(0, os.SEEK_SET)
+			}
+
+			if rdrOffset == s && i != len(r.readers)-1 {
+				idx++
+				rdrOffset = 0
+			}
+			r.pos = &pos{idx, rdrOffset}
+			return offset, nil
+		}
+	case os.SEEK_END:
+		for _, rdr := range r.readers {
+			s, err := rdr.Seek(0, os.SEEK_END)
+			if err != nil {
+				return -1, err
+			}
+			tmpOffset += s
+		}
+		r.Seek(tmpOffset+offset, os.SEEK_SET)
+		return tmpOffset + offset, nil
+	case os.SEEK_CUR:
+		if r.pos == nil {
+			return r.Seek(offset, os.SEEK_SET)
+		}
+		// Just return the current offset
+		if offset == 0 {
+			return r.getCurOffset()
+		}
+
+		curOffset, err := r.getCurOffset()
+		if err != nil {
+			return -1, err
+		}
+		rdr, rdrOffset, err := r.getReaderForOffset(curOffset + offset)
+		if err != nil {
+			return -1, err
+		}
+
+		r.pos = &pos{r.posIdx[rdr], rdrOffset}
+		return curOffset + offset, nil
+	default:
+		return -1, fmt.Errorf("Invalid whence: %d", whence)
+	}
+
+	return -1, fmt.Errorf("Error seeking for whence: %d, offset: %d", whence, offset)
+}
+
+func (r *multiReadSeeker) getReaderForOffset(offset int64) (io.ReadSeeker, int64, error) {
+	var rdr io.ReadSeeker
+	var rdrOffset int64
+
+	for i, rdr := range r.readers {
+		offsetTo, err := r.getOffsetToReader(rdr)
+		if err != nil {
+			return nil, -1, err
+		}
+		if offsetTo > offset {
+			rdr = r.readers[i-1]
+			rdrOffset = offsetTo - offset
+			break
+		}
+
+		if rdr == r.readers[len(r.readers)-1] {
+			rdrOffset = offsetTo + offset
+			break
+		}
+	}
+
+	return rdr, rdrOffset, nil
+}
+
+func (r *multiReadSeeker) getCurOffset() (int64, error) {
+	var totalSize int64
+	for _, rdr := range r.readers[:r.pos.idx+1] {
+		if r.posIdx[rdr] == r.pos.idx {
+			totalSize += r.pos.offset
+			break
+		}
+
+		size, err := getReadSeekerSize(rdr)
+		if err != nil {
+			return -1, fmt.Errorf("error getting seeker size: %v", err)
+		}
+		totalSize += size
+	}
+	return totalSize, nil
+}
+
+func (r *multiReadSeeker) getOffsetToReader(rdr io.ReadSeeker) (int64, error) {
+	var offset int64
+	for _, r := range r.readers {
+		if r == rdr {
+			break
+		}
+
+		size, err := getReadSeekerSize(rdr)
+		if err != nil {
+			return -1, err
+		}
+		offset += size
+	}
+	return offset, nil
+}
+
+func (r *multiReadSeeker) Read(b []byte) (int, error) {
+	if r.pos == nil {
+		r.pos = &pos{0, 0}
+	}
+
+	bCap := int64(cap(b))
+	buf := bytes.NewBuffer(nil)
+	var rdr io.ReadSeeker
+
+	for _, rdr = range r.readers[r.pos.idx:] {
+		readBytes, err := io.CopyN(buf, rdr, bCap)
+		if err != nil && err != io.EOF {
+			return -1, err
+		}
+		bCap -= readBytes
+
+		if bCap == 0 {
+			break
+		}
+	}
+
+	rdrPos, err := rdr.Seek(0, os.SEEK_CUR)
+	if err != nil {
+		return -1, err
+	}
+	r.pos = &pos{r.posIdx[rdr], rdrPos}
+	return buf.Read(b)
+}
+
+func getReadSeekerSize(rdr io.ReadSeeker) (int64, error) {
+	// save the current position
+	pos, err := rdr.Seek(0, os.SEEK_CUR)
+	if err != nil {
+		return -1, err
+	}
+
+	// get the size
+	size, err := rdr.Seek(0, os.SEEK_END)
+	if err != nil {
+		return -1, err
+	}
+
+	// reset the position
+	if _, err := rdr.Seek(pos, os.SEEK_SET); err != nil {
+		return -1, err
+	}
+	return size, nil
+}
+
+// MultiReadSeeker returns a ReadSeeker that's the logical concatenation of the provided
+// input readseekers. After calling this method the initial position is set to the
+// beginning of the first ReadSeeker. At the end of a ReadSeeker, Read always advances
+// to the beginning of the next ReadSeeker and returns EOF at the end of the last ReadSeeker.
+// Seek can be used over the sum of lengths of all readseekers.
+//
+// When a MultiReadSeeker is used, no Read and Seek operations should be made on
+// its ReadSeeker components. Also, users should make no assumption on the state
+// of individual readseekers while the MultiReadSeeker is used.
+func MultiReadSeeker(readers ...io.ReadSeeker) io.ReadSeeker {
+	if len(readers) == 1 {
+		return readers[0]
+	}
+	idx := make(map[io.ReadSeeker]int)
+	for i, rdr := range readers {
+		idx[rdr] = i
+	}
+	return &multiReadSeeker{
+		readers: readers,
+		posIdx:  idx,
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/multireader_test.go

@@ -0,0 +1,149 @@
+package ioutils
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestMultiReadSeekerReadAll(t *testing.T) {
+	str := "hello world"
+	s1 := strings.NewReader(str + " 1")
+	s2 := strings.NewReader(str + " 2")
+	s3 := strings.NewReader(str + " 3")
+	mr := MultiReadSeeker(s1, s2, s3)
+
+	expectedSize := int64(s1.Len() + s2.Len() + s3.Len())
+
+	b, err := ioutil.ReadAll(mr)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expected := "hello world 1hello world 2hello world 3"
+	if string(b) != expected {
+		t.Fatalf("ReadAll failed, got: %q, expected %q", string(b), expected)
+	}
+
+	size, err := mr.Seek(0, os.SEEK_END)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if size != expectedSize {
+		t.Fatalf("reader size does not match, got %d, expected %d", size, expectedSize)
+	}
+
+	// Reset the position and read again
+	pos, err := mr.Seek(0, os.SEEK_SET)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if pos != 0 {
+		t.Fatalf("expected position to be set to 0, got %d", pos)
+	}
+
+	b, err = ioutil.ReadAll(mr)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if string(b) != expected {
+		t.Fatalf("ReadAll failed, got: %q, expected %q", string(b), expected)
+	}
+}
+
+func TestMultiReadSeekerReadEach(t *testing.T) {
+	str := "hello world"
+	s1 := strings.NewReader(str + " 1")
+	s2 := strings.NewReader(str + " 2")
+	s3 := strings.NewReader(str + " 3")
+	mr := MultiReadSeeker(s1, s2, s3)
+
+	var totalBytes int64
+	for i, s := range []*strings.Reader{s1, s2, s3} {
+		sLen := int64(s.Len())
+		buf := make([]byte, s.Len())
+		expected := []byte(fmt.Sprintf("%s %d", str, i+1))
+
+		if _, err := mr.Read(buf); err != nil && err != io.EOF {
+			t.Fatal(err)
+		}
+
+		if !bytes.Equal(buf, expected) {
+			t.Fatalf("expected %q to be %q", string(buf), string(expected))
+		}
+
+		pos, err := mr.Seek(0, os.SEEK_CUR)
+		if err != nil {
+			t.Fatalf("iteration: %d, error: %v", i+1, err)
+		}
+
+		// check that the total bytes read is the current position of the seeker
+		totalBytes += sLen
+		if pos != totalBytes {
+			t.Fatalf("expected current position to be: %d, got: %d, iteration: %d", totalBytes, pos, i+1)
+		}
+
+		// This tests not only that SEEK_SET and SEEK_CUR give the same values, but that the next iteration is in the expected position as well
+		newPos, err := mr.Seek(pos, os.SEEK_SET)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if newPos != pos {
+			t.Fatalf("expected to get same position when calling SEEK_SET with value from SEEK_CUR, cur: %d, set: %d", pos, newPos)
+		}
+	}
+}
+
+func TestMultiReadSeekerReadSpanningChunks(t *testing.T) {
+	str := "hello world"
+	s1 := strings.NewReader(str + " 1")
+	s2 := strings.NewReader(str + " 2")
+	s3 := strings.NewReader(str + " 3")
+	mr := MultiReadSeeker(s1, s2, s3)
+
+	buf := make([]byte, s1.Len()+3)
+	_, err := mr.Read(buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// expected is the contents of s1 + 3 bytes from s2, ie, the `hel` at the end of this string
+	expected := "hello world 1hel"
+	if string(buf) != expected {
+		t.Fatalf("expected %s to be %s", string(buf), expected)
+	}
+}
+
+func TestMultiReadSeekerNegativeSeek(t *testing.T) {
+	str := "hello world"
+	s1 := strings.NewReader(str + " 1")
+	s2 := strings.NewReader(str + " 2")
+	s3 := strings.NewReader(str + " 3")
+	mr := MultiReadSeeker(s1, s2, s3)
+
+	s1Len := s1.Len()
+	s2Len := s2.Len()
+	s3Len := s3.Len()
+
+	s, err := mr.Seek(int64(-1*s3.Len()), os.SEEK_END)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if s != int64(s1Len+s2Len) {
+		t.Fatalf("expected %d to be %d", s, s1.Len()+s2.Len())
+	}
+
+	buf := make([]byte, s3Len)
+	if _, err := mr.Read(buf); err != nil && err != io.EOF {
+		t.Fatal(err)
+	}
+	expected := fmt.Sprintf("%s %d", str, 3)
+	if string(buf) != fmt.Sprintf("%s %d", str, 3) {
+		t.Fatalf("expected %q to be %q", string(buf), expected)
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/readers.go

@@ -0,0 +1,154 @@
+package ioutils
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"io"
+
+	"golang.org/x/net/context"
+)
+
+type readCloserWrapper struct {
+	io.Reader
+	closer func() error
+}
+
+func (r *readCloserWrapper) Close() error {
+	return r.closer()
+}
+
+// NewReadCloserWrapper returns a new io.ReadCloser.
+func NewReadCloserWrapper(r io.Reader, closer func() error) io.ReadCloser {
+	return &readCloserWrapper{
+		Reader: r,
+		closer: closer,
+	}
+}
+
+type readerErrWrapper struct {
+	reader io.Reader
+	closer func()
+}
+
+func (r *readerErrWrapper) Read(p []byte) (int, error) {
+	n, err := r.reader.Read(p)
+	if err != nil {
+		r.closer()
+	}
+	return n, err
+}
+
+// NewReaderErrWrapper returns a new io.Reader.
+func NewReaderErrWrapper(r io.Reader, closer func()) io.Reader {
+	return &readerErrWrapper{
+		reader: r,
+		closer: closer,
+	}
+}
+
+// HashData returns the sha256 sum of src.
+func HashData(src io.Reader) (string, error) {
+	h := sha256.New()
+	if _, err := io.Copy(h, src); err != nil {
+		return "", err
+	}
+	return "sha256:" + hex.EncodeToString(h.Sum(nil)), nil
+}
+
+// OnEOFReader wraps a io.ReadCloser and a function
+// the function will run at the end of file or close the file.
+type OnEOFReader struct {
+	Rc io.ReadCloser
+	Fn func()
+}
+
+func (r *OnEOFReader) Read(p []byte) (n int, err error) {
+	n, err = r.Rc.Read(p)
+	if err == io.EOF {
+		r.runFunc()
+	}
+	return
+}
+
+// Close closes the file and run the function.
+func (r *OnEOFReader) Close() error {
+	err := r.Rc.Close()
+	r.runFunc()
+	return err
+}
+
+func (r *OnEOFReader) runFunc() {
+	if fn := r.Fn; fn != nil {
+		fn()
+		r.Fn = nil
+	}
+}
+
+// cancelReadCloser wraps an io.ReadCloser with a context for cancelling read
+// operations.
+type cancelReadCloser struct {
+	cancel func()
+	pR     *io.PipeReader // Stream to read from
+	pW     *io.PipeWriter
+}
+
+// NewCancelReadCloser creates a wrapper that closes the ReadCloser when the
+// context is cancelled. The returned io.ReadCloser must be closed when it is
+// no longer needed.
+func NewCancelReadCloser(ctx context.Context, in io.ReadCloser) io.ReadCloser {
+	pR, pW := io.Pipe()
+
+	// Create a context used to signal when the pipe is closed
+	doneCtx, cancel := context.WithCancel(context.Background())
+
+	p := &cancelReadCloser{
+		cancel: cancel,
+		pR:     pR,
+		pW:     pW,
+	}
+
+	go func() {
+		_, err := io.Copy(pW, in)
+		select {
+		case <-ctx.Done():
+			// If the context was closed, p.closeWithError
+			// was already called. Calling it again would
+			// change the error that Read returns.
+		default:
+			p.closeWithError(err)
+		}
+		in.Close()
+	}()
+	go func() {
+		for {
+			select {
+			case <-ctx.Done():
+				p.closeWithError(ctx.Err())
+			case <-doneCtx.Done():
+				return
+			}
+		}
+	}()
+
+	return p
+}
+
+// Read wraps the Read method of the pipe that provides data from the wrapped
+// ReadCloser.
+func (p *cancelReadCloser) Read(buf []byte) (n int, err error) {
+	return p.pR.Read(buf)
+}
+
+// closeWithError closes the wrapper and its underlying reader. It will
+// cause future calls to Read to return err.
+func (p *cancelReadCloser) closeWithError(err error) {
+	p.pW.CloseWithError(err)
+	p.cancel()
+}
+
+// Close closes the wrapper its underlying reader. It will cause
+// future calls to Read to return io.EOF.
+func (p *cancelReadCloser) Close() error {
+	p.closeWithError(io.EOF)
+	return nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/readers_test.go

@@ -0,0 +1,94 @@
+package ioutils
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+)
+
+// Implement io.Reader
+type errorReader struct{}
+
+func (r *errorReader) Read(p []byte) (int, error) {
+	return 0, fmt.Errorf("Error reader always fail.")
+}
+
+func TestReadCloserWrapperClose(t *testing.T) {
+	reader := strings.NewReader("A string reader")
+	wrapper := NewReadCloserWrapper(reader, func() error {
+		return fmt.Errorf("This will be called when closing")
+	})
+	err := wrapper.Close()
+	if err == nil || !strings.Contains(err.Error(), "This will be called when closing") {
+		t.Fatalf("readCloserWrapper should have call the anonymous func and thus, fail.")
+	}
+}
+
+func TestReaderErrWrapperReadOnError(t *testing.T) {
+	called := false
+	reader := &errorReader{}
+	wrapper := NewReaderErrWrapper(reader, func() {
+		called = true
+	})
+	_, err := wrapper.Read([]byte{})
+	if err == nil || !strings.Contains(err.Error(), "Error reader always fail.") {
+		t.Fatalf("readErrWrapper should returned an error")
+	}
+	if !called {
+		t.Fatalf("readErrWrapper should have call the anonymous function on failure")
+	}
+}
+
+func TestReaderErrWrapperRead(t *testing.T) {
+	reader := strings.NewReader("a string reader.")
+	wrapper := NewReaderErrWrapper(reader, func() {
+		t.Fatalf("readErrWrapper should not have called the anonymous function")
+	})
+	// Read 20 byte (should be ok with the string above)
+	num, err := wrapper.Read(make([]byte, 20))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if num != 16 {
+		t.Fatalf("readerErrWrapper should have read 16 byte, but read %d", num)
+	}
+}
+
+func TestHashData(t *testing.T) {
+	reader := strings.NewReader("hash-me")
+	actual, err := HashData(reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+	expected := "sha256:4d11186aed035cc624d553e10db358492c84a7cd6b9670d92123c144930450aa"
+	if actual != expected {
+		t.Fatalf("Expecting %s, got %s", expected, actual)
+	}
+}
+
+type perpetualReader struct{}
+
+func (p *perpetualReader) Read(buf []byte) (n int, err error) {
+	for i := 0; i != len(buf); i++ {
+		buf[i] = 'a'
+	}
+	return len(buf), nil
+}
+
+func TestCancelReadCloser(t *testing.T) {
+	ctx, _ := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	cancelReadCloser := NewCancelReadCloser(ctx, ioutil.NopCloser(&perpetualReader{}))
+	for {
+		var buf [128]byte
+		_, err := cancelReadCloser.Read(buf[:])
+		if err == context.DeadlineExceeded {
+			break
+		} else if err != nil {
+			t.Fatalf("got unexpected error: %v", err)
+		}
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/scheduler.go

@@ -0,0 +1,6 @@
+// +build !gccgo
+
+package ioutils
+
+func callSchedulerIfNecessary() {
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/scheduler_gccgo.go

@@ -0,0 +1,13 @@
+// +build gccgo
+
+package ioutils
+
+import (
+	"runtime"
+)
+
+func callSchedulerIfNecessary() {
+	//allow or force Go scheduler to switch context, without explicitly
+	//forcing this will make it hang when using gccgo implementation
+	runtime.Gosched()
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/temp_unix.go

@@ -0,0 +1,10 @@
+// +build !windows
+
+package ioutils
+
+import "io/ioutil"
+
+// TempDir on Unix systems is equivalent to ioutil.TempDir.
+func TempDir(dir, prefix string) (string, error) {
+	return ioutil.TempDir(dir, prefix)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/temp_windows.go

@@ -0,0 +1,18 @@
+// +build windows
+
+package ioutils
+
+import (
+	"io/ioutil"
+
+	"github.com/docker/docker/pkg/longpath"
+)
+
+// TempDir is the equivalent of ioutil.TempDir, except that the result is in Windows longpath format.
+func TempDir(dir, prefix string) (string, error) {
+	tempDir, err := ioutil.TempDir(dir, prefix)
+	if err != nil {
+		return "", err
+	}
+	return longpath.AddPrefix(tempDir), nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/writeflusher.go

@@ -0,0 +1,92 @@
+package ioutils
+
+import (
+	"errors"
+	"io"
+	"net/http"
+	"sync"
+)
+
+// WriteFlusher wraps the Write and Flush operation ensuring that every write
+// is a flush. In addition, the Close method can be called to intercept
+// Read/Write calls if the targets lifecycle has already ended.
+type WriteFlusher struct {
+	mu      sync.Mutex
+	w       io.Writer
+	flusher http.Flusher
+	flushed bool
+	closed  error
+
+	// TODO(stevvooe): Use channel for closed instead, remove mutex. Using a
+	// channel will allow one to properly order the operations.
+}
+
+var errWriteFlusherClosed = errors.New("writeflusher: closed")
+
+func (wf *WriteFlusher) Write(b []byte) (n int, err error) {
+	wf.mu.Lock()
+	defer wf.mu.Unlock()
+	if wf.closed != nil {
+		return 0, wf.closed
+	}
+
+	n, err = wf.w.Write(b)
+	wf.flush() // every write is a flush.
+	return n, err
+}
+
+// Flush the stream immediately.
+func (wf *WriteFlusher) Flush() {
+	wf.mu.Lock()
+	defer wf.mu.Unlock()
+
+	wf.flush()
+}
+
+// flush the stream immediately without taking a lock. Used internally.
+func (wf *WriteFlusher) flush() {
+	if wf.closed != nil {
+		return
+	}
+
+	wf.flushed = true
+	wf.flusher.Flush()
+}
+
+// Flushed returns the state of flushed.
+// If it's flushed, return true, or else it return false.
+func (wf *WriteFlusher) Flushed() bool {
+	// BUG(stevvooe): Remove this method. Its use is inherently racy. Seems to
+	// be used to detect whether or a response code has been issued or not.
+	// Another hook should be used instead.
+	wf.mu.Lock()
+	defer wf.mu.Unlock()
+
+	return wf.flushed
+}
+
+// Close closes the write flusher, disallowing any further writes to the
+// target. After the flusher is closed, all calls to write or flush will
+// result in an error.
+func (wf *WriteFlusher) Close() error {
+	wf.mu.Lock()
+	defer wf.mu.Unlock()
+
+	if wf.closed != nil {
+		return wf.closed
+	}
+
+	wf.closed = errWriteFlusherClosed
+	return nil
+}
+
+// NewWriteFlusher returns a new WriteFlusher.
+func NewWriteFlusher(w io.Writer) *WriteFlusher {
+	var flusher http.Flusher
+	if f, ok := w.(http.Flusher); ok {
+		flusher = f
+	} else {
+		flusher = &NopFlusher{}
+	}
+	return &WriteFlusher{w: w, flusher: flusher}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/writers.go

@@ -0,0 +1,66 @@
+package ioutils
+
+import "io"
+
+// NopWriter represents a type which write operation is nop.
+type NopWriter struct{}
+
+func (*NopWriter) Write(buf []byte) (int, error) {
+	return len(buf), nil
+}
+
+type nopWriteCloser struct {
+	io.Writer
+}
+
+func (w *nopWriteCloser) Close() error { return nil }
+
+// NopWriteCloser returns a nopWriteCloser.
+func NopWriteCloser(w io.Writer) io.WriteCloser {
+	return &nopWriteCloser{w}
+}
+
+// NopFlusher represents a type which flush operation is nop.
+type NopFlusher struct{}
+
+// Flush is a nop operation.
+func (f *NopFlusher) Flush() {}
+
+type writeCloserWrapper struct {
+	io.Writer
+	closer func() error
+}
+
+func (r *writeCloserWrapper) Close() error {
+	return r.closer()
+}
+
+// NewWriteCloserWrapper returns a new io.WriteCloser.
+func NewWriteCloserWrapper(r io.Writer, closer func() error) io.WriteCloser {
+	return &writeCloserWrapper{
+		Writer: r,
+		closer: closer,
+	}
+}
+
+// WriteCounter wraps a concrete io.Writer and hold a count of the number
+// of bytes written to the writer during a "session".
+// This can be convenient when write return is masked
+// (e.g., json.Encoder.Encode())
+type WriteCounter struct {
+	Count  int64
+	Writer io.Writer
+}
+
+// NewWriteCounter returns a new WriteCounter.
+func NewWriteCounter(w io.Writer) *WriteCounter {
+	return &WriteCounter{
+		Writer: w,
+	}
+}
+
+func (wc *WriteCounter) Write(p []byte) (count int, err error) {
+	count, err = wc.Writer.Write(p)
+	wc.Count += int64(count)
+	return
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/ioutils/writers_test.go

@@ -0,0 +1,65 @@
+package ioutils
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+)
+
+func TestWriteCloserWrapperClose(t *testing.T) {
+	called := false
+	writer := bytes.NewBuffer([]byte{})
+	wrapper := NewWriteCloserWrapper(writer, func() error {
+		called = true
+		return nil
+	})
+	if err := wrapper.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if !called {
+		t.Fatalf("writeCloserWrapper should have call the anonymous function.")
+	}
+}
+
+func TestNopWriteCloser(t *testing.T) {
+	writer := bytes.NewBuffer([]byte{})
+	wrapper := NopWriteCloser(writer)
+	if err := wrapper.Close(); err != nil {
+		t.Fatal("NopWriteCloser always return nil on Close.")
+	}
+
+}
+
+func TestNopWriter(t *testing.T) {
+	nw := &NopWriter{}
+	l, err := nw.Write([]byte{'c'})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if l != 1 {
+		t.Fatalf("Expected 1 got %d", l)
+	}
+}
+
+func TestWriteCounter(t *testing.T) {
+	dummy1 := "This is a dummy string."
+	dummy2 := "This is another dummy string."
+	totalLength := int64(len(dummy1) + len(dummy2))
+
+	reader1 := strings.NewReader(dummy1)
+	reader2 := strings.NewReader(dummy2)
+
+	var buffer bytes.Buffer
+	wc := NewWriteCounter(&buffer)
+
+	reader1.WriteTo(wc)
+	reader2.WriteTo(wc)
+
+	if wc.Count != totalLength {
+		t.Errorf("Wrong count: %d vs. %d", wc.Count, totalLength)
+	}
+
+	if buffer.String() != dummy1+dummy2 {
+		t.Error("Wrong message written")
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/pools/pools.go

@@ -0,0 +1,119 @@
+// Package pools provides a collection of pools which provide various
+// data types with buffers. These can be used to lower the number of
+// memory allocations and reuse buffers.
+//
+// New pools should be added to this package to allow them to be
+// shared across packages.
+//
+// Utility functions which operate on pools should be added to this
+// package to allow them to be reused.
+package pools
+
+import (
+	"bufio"
+	"io"
+	"sync"
+
+	"github.com/docker/docker/pkg/ioutils"
+)
+
+var (
+	// BufioReader32KPool is a pool which returns bufio.Reader with a 32K buffer.
+	BufioReader32KPool *BufioReaderPool
+	// BufioWriter32KPool is a pool which returns bufio.Writer with a 32K buffer.
+	BufioWriter32KPool *BufioWriterPool
+)
+
+const buffer32K = 32 * 1024
+
+// BufioReaderPool is a bufio reader that uses sync.Pool.
+type BufioReaderPool struct {
+	pool sync.Pool
+}
+
+func init() {
+	BufioReader32KPool = newBufioReaderPoolWithSize(buffer32K)
+	BufioWriter32KPool = newBufioWriterPoolWithSize(buffer32K)
+}
+
+// newBufioReaderPoolWithSize is unexported because new pools should be
+// added here to be shared where required.
+func newBufioReaderPoolWithSize(size int) *BufioReaderPool {
+	pool := sync.Pool{
+		New: func() interface{} { return bufio.NewReaderSize(nil, size) },
+	}
+	return &BufioReaderPool{pool: pool}
+}
+
+// Get returns a bufio.Reader which reads from r. The buffer size is that of the pool.
+func (bufPool *BufioReaderPool) Get(r io.Reader) *bufio.Reader {
+	buf := bufPool.pool.Get().(*bufio.Reader)
+	buf.Reset(r)
+	return buf
+}
+
+// Put puts the bufio.Reader back into the pool.
+func (bufPool *BufioReaderPool) Put(b *bufio.Reader) {
+	b.Reset(nil)
+	bufPool.pool.Put(b)
+}
+
+// Copy is a convenience wrapper which uses a buffer to avoid allocation in io.Copy.
+func Copy(dst io.Writer, src io.Reader) (written int64, err error) {
+	buf := BufioReader32KPool.Get(src)
+	written, err = io.Copy(dst, buf)
+	BufioReader32KPool.Put(buf)
+	return
+}
+
+// NewReadCloserWrapper returns a wrapper which puts the bufio.Reader back
+// into the pool and closes the reader if it's an io.ReadCloser.
+func (bufPool *BufioReaderPool) NewReadCloserWrapper(buf *bufio.Reader, r io.Reader) io.ReadCloser {
+	return ioutils.NewReadCloserWrapper(r, func() error {
+		if readCloser, ok := r.(io.ReadCloser); ok {
+			readCloser.Close()
+		}
+		bufPool.Put(buf)
+		return nil
+	})
+}
+
+// BufioWriterPool is a bufio writer that uses sync.Pool.
+type BufioWriterPool struct {
+	pool sync.Pool
+}
+
+// newBufioWriterPoolWithSize is unexported because new pools should be
+// added here to be shared where required.
+func newBufioWriterPoolWithSize(size int) *BufioWriterPool {
+	pool := sync.Pool{
+		New: func() interface{} { return bufio.NewWriterSize(nil, size) },
+	}
+	return &BufioWriterPool{pool: pool}
+}
+
+// Get returns a bufio.Writer which writes to w. The buffer size is that of the pool.
+func (bufPool *BufioWriterPool) Get(w io.Writer) *bufio.Writer {
+	buf := bufPool.pool.Get().(*bufio.Writer)
+	buf.Reset(w)
+	return buf
+}
+
+// Put puts the bufio.Writer back into the pool.
+func (bufPool *BufioWriterPool) Put(b *bufio.Writer) {
+	b.Reset(nil)
+	bufPool.pool.Put(b)
+}
+
+// NewWriteCloserWrapper returns a wrapper which puts the bufio.Writer back
+// into the pool and closes the writer if it's an io.Writecloser.
+func (bufPool *BufioWriterPool) NewWriteCloserWrapper(buf *bufio.Writer, w io.Writer) io.WriteCloser {
+	return ioutils.NewWriteCloserWrapper(w, func() error {
+		buf.Flush()
+		if writeCloser, ok := w.(io.WriteCloser); ok {
+			writeCloser.Close()
+		}
+		bufPool.Put(buf)
+		return nil
+	})
+}