ollama source for Momentry Core verification

server/internal/cache/blob/casecheck_test.go

@@ -0,0 +1,93 @@
+package blob
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+func isCaseSensitive(dir string) bool {
+	defer func() {
+		os.Remove(filepath.Join(dir, "_casecheck"))
+	}()
+
+	exists := func(file string) bool {
+		_, err := os.Stat(file)
+		return err == nil
+	}
+
+	file := filepath.Join(dir, "_casecheck")
+	FILE := filepath.Join(dir, "_CASECHECK")
+	if exists(file) || exists(FILE) {
+		panic(fmt.Sprintf("_casecheck already exists in %q; remove and try again.", dir))
+	}
+
+	err := os.WriteFile(file, nil, 0o666)
+	if err != nil {
+		panic(err)
+	}
+
+	return !exists(FILE)
+}
+
+func isCI() bool {
+	return os.Getenv("CI") != ""
+}
+
+const volumeHint = `
+
+	Unable to locate case-insensitive TMPDIR on darwin.
+
+	To run tests, create the case-insensitive volume /Volumes/data:
+
+		$ sudo diskutil apfs addVolume disk1 APFSX data -mountpoint /Volumes/data
+
+	or run with:
+
+		CI=1 go test ./...
+
+`
+
+// useCaseInsensitiveTempDir sets TMPDIR to a case-insensitive directory
+// can find one, otherwise it skips the test if the CI environment variable is
+// set, or GOOS is not darwin.
+func useCaseInsensitiveTempDir(t *testing.T) bool {
+	if isCaseSensitive(os.TempDir()) {
+		// Use the default temp dir if it is already case-sensitive.
+		return true
+	}
+	if runtime.GOOS == "darwin" {
+		// If darwin, check for the special case-sensitive volume and
+		// use it if available.
+		const volume = "/Volumes/data"
+		_, err := os.Stat(volume)
+		if err == nil {
+			tmpdir := filepath.Join(volume, "tmp")
+			os.MkdirAll(tmpdir, 0o700)
+			t.Setenv("TMPDIR", tmpdir)
+			return true
+		}
+		if isCI() {
+			// Special case darwin in CI; it is not case-sensitive
+			// by default, and we will be testing other platforms
+			// that are case-sensitive, so we'll have the test
+			// being skipped covered there.
+			t.Skip("Skipping test in CI for darwin; TMPDIR is not case-insensitive.")
+		}
+	}
+
+	if !isCI() {
+		// Require devs to always tests with a case-insensitive TMPDIR.
+
+		// TODO(bmizerany): Print platform-specific instructions or
+		// link to docs on that topic.
+		lines := strings.Split(volumeHint, "\n")
+		for _, line := range lines {
+			t.Skip(line)
+		}
+	}
+	return false
+}