Redesigned moudule system

* Top level private APIs (e.g. jasmine.private.whatever) are no longer
  exposed
* jasmineRequire is no longer exposed
* core is self-booting
* Globals are automatically created in browsers. (They can subsequently
  be removed by user code if desired.)
* Globals are *not* automatically created in Node. An installGlobals
  function is exported instead. The jasmine package calls installGlobals
  unless configured not to do so.
* In Node, the same instance is returned each time jasmine-core is
  imported. A reset function is exported. It effectively resets all state
  by discarding the env and creating a new one. This allows mulitple
  sequential runs within the same process to be independent of each
  other, but does not allow multiple concurrent runs. (That probably never
  worked anyway.)

Fixes #2094

src/boot/jasmine-core.js

@@ -1,69 +1,24 @@
 'use strict';
 
-/**
- * Note: Only available on Node.
- * @module jasmine-core
- */
+const path = require('path');
+const fs = require('fs');
+const {
+  globals,
+  installGlobals,
+  private$
+} = require('./jasmine-core/jasmine.js');
 
-const jasmineRequire = require('./jasmine-core/jasmine.js');
-module.exports = jasmineRequire;
-
-const bootWithoutGlobals = (function() {
-  let jasmine, jasmineInterface;
-
-  return function bootWithoutGlobals(reinitialize) {
-    if (!jasmineInterface || reinitialize === true) {
-      jasmine = jasmineRequire.core(jasmineRequire);
-      const env = jasmine.getEnv({ suppressLoadErrors: true });
-      jasmineInterface = jasmineRequire.interface(jasmine, env);
-    }
-
-    return { jasmine, jasmineInterface };
-  };
-})();
-
-/**
- * Boots a copy of Jasmine and returns an object as described in {@link jasmine}.
- * @param {boolean} [reinitialize=true] Whether to create a new copy of Jasmine if one already exists
- * @type {function}
- * @return {jasmine}
- */
-module.exports.boot = function(reinitialize) {
-  if (reinitialize === undefined) {
-    reinitialize = true;
-  }
-
-  const { jasmine, jasmineInterface } = bootWithoutGlobals(reinitialize);
-
-  for (const k in jasmineInterface) {
-    global[k] = jasmineInterface[k];
-  }
-
-  return jasmine;
-};
-
-/**
- * Boots a copy of Jasmine and returns an object containing the properties
- * that would normally be added to the global object. If noGlobals is called
- * multiple times, the same object is returned every time.
- *
- * @example
- * const {describe, beforeEach, it, expect, jasmine} = require('jasmine-core').noGlobals();
- */
-module.exports.noGlobals = function() {
-  const { jasmineInterface } = bootWithoutGlobals(false);
-  return jasmineInterface;
-};
-
-const path = require('path'),
-  fs = require('fs');
+function reset() {
+  private$.currentEnv_ = null;
+  const env = jasmine.getEnv({ suppressLoadErrors: true });
+  rebindInterface(env);
+}
 
 const rootPath = path.join(__dirname, 'jasmine-core'),
-  bootFiles = ['boot0.js', 'boot1.js'],
-  legacyBootFiles = ['boot.js'],
+  bootFiles = ['boot.js'],
   cssFiles = [],
   jsFiles = [],
-  jsFilesToSkip = ['jasmine.js'].concat(bootFiles, legacyBootFiles);
+  jsFilesToSkip = ['jasmine.js'].concat(bootFiles);
 
 fs.readdirSync(rootPath).forEach(function(file) {
   if (fs.statSync(path.join(rootPath, file)).isFile()) {
@@ -80,12 +35,35 @@ fs.readdirSync(rootPath).forEach(function(file) {
   }
 });
 
-module.exports.files = {
-  self: __filename,
-  path: rootPath,
-  bootDir: rootPath,
-  bootFiles: bootFiles,
-  cssFiles: cssFiles,
-  jsFiles: ['jasmine.js'].concat(jsFiles),
-  imagesDir: path.join(__dirname, '../images')
+/**
+ * Note: Only available on Node.
+ *
+ * In addition to the members documented here, this module's exports include all
+ * {@link globals}.
+ * @module jasmine-core
+ */
+module.exports = {
+  ...globals,
+  /**
+   * Copies Jasmine globals (jasmine, describe, it, etc) to the specified
+   * object or to globalThis.
+   * @function
+   * @param {object} [dest] - The object to copy globals to.
+   */
+  installGlobals,
+  /**
+   * Resets all of jasmine-core's state, including removing specs, suites, and
+   * reporters, and resetting configuration to the default.
+   * @function
+   */
+  reset,
+  files: {
+    self: __filename,
+    path: rootPath,
+    bootDir: rootPath,
+    bootFiles: bootFiles,
+    cssFiles: cssFiles,
+    jsFiles: ['jasmine.js'].concat(jsFiles),
+    imagesDir: path.join(__dirname, '../images')
+  }
 };