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Diffstat (limited to 'lib/bundlers/browserify/browserifyRewire.js')
| -rw-r--r-- | lib/bundlers/browserify/browserifyRewire.js | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/lib/bundlers/browserify/browserifyRewire.js b/lib/bundlers/browserify/browserifyRewire.js deleted file mode 100644 index b09b51a..0000000 --- a/lib/bundlers/browserify/browserifyRewire.js +++ /dev/null @@ -1,189 +0,0 @@ -var pathUtil = require("path"), - getImportGlobalsSrc = require("./getImportGlobalsSrc.js"); // must be relative to lib/index.js because of forwardBrowserifyRewire() - -/** - * Clones an object deeply. Used to clone the module-object that is - * stored in the cache. Because browserify doesn't create the module- - * object newly if the module is executed again we can't modify the - * exports object directly. Instead of we have to make an independent copy. - * - * @param {!Object} obj - * @return {Object} - */ -function clone(obj) { - var target = {}, - value, - key; - - for (key in obj) { - if (obj.hasOwnProperty(key)) { - value = obj[key]; - if (Array.isArray(value)) { - target[key] = value.slice(0); - } else if (typeof value === "object" && value !== null) { - target[key] = clone(value); - } else { - target[key] = value; - } - - } - } - - return target; -} - -// Saves all setters and getters for every module according to its filename -var registry = {}; - -/** - * Executes the given module and adds a special setter and getter that allow you to set and get private variables. - * The parentModulePath is usually set by the requireProxy. - * - * @param {!String} parentModulePath __filename of the module, that wants to rewire() another module. - * @param {!String} path path to the module that shall be rewired - * @return {Object} the rewired module - */ -function browserifyRewire(parentModulePath, path) { - var cached, - originalModule, - originalExports, - absPath, - rewiredExports = {}, - registryEntry, - _require = require; // hide it from browserify to avoid annoying console warnings - - // Normalize path with file extensions - absPath = pathUtil.resolve(parentModulePath, path); - - // Retrieve original module from cache - cached = originalModule = require.cache[absPath]; - - if (cached) { - // If there is already a module instance in the cache we have to store the original exports-object - // manually so it won't be overwritten by the next execution. This is all necessary due to browserify's - // odd way of module creation. - originalExports = originalModule.exports; - originalModule.exports = rewiredExports; - - // Delete the original module from the cache so the next call to _require() - // executes the module - delete require.cache[absPath]; - } - - // Require module to trigger rewire.register(). - _require(absPath); - - originalModule = require.cache[absPath]; - - // Now we're cloning the exports-obj so later modifications of the rewired module won't influence the - // cached, original version of this module. - rewiredExports = clone(originalModule.exports); - - if (cached) { - // Restore original exports - originalModule.exports = originalExports; - } - - // Get registry entry of the target module - registryEntry = registry[absPath]; - - // Apply setter and getters - rewiredExports.__set__ = registryEntry.setter; - rewiredExports.__get__ = registryEntry.getter; - - return rewiredExports; -} - -/** - * Registers the setter and getter of every module according to its filename - * - * @param {!String} filename the absolute path to the module (module id) - * @param {!Function} setter - * @param {!Function} getter - */ -browserifyRewire.register = function (filename, module, setter, getter) { - registry[filename] = { - module: module, - setter: setter, - getter: getter - }; -}; - -/** - * Provides a special require-proxy. Every module calls require("rewire").getProxy(require, __filename) at the - * beginning and overrides its own require with this proxy. - * - * This is necessary to call rewire() with the original __filename. Thus you can use rewire() like require(). - * - * @param {!Function} internalRequire the module's own require - * @param {String} dirname the __dirname of the module - * @return {Function} requireProxy - */ -browserifyRewire.getProxy = function (internalRequire, dirname) { - var rewire = internalRequire("rewire"), - rewireProxyInit = false; - - function copyProperties(from, to) { - var key; - - for (key in from) { - if (from.hasOwnProperty(key)) { - to[key] = from[key]; - } - } - } - - function rewireProxy(path, cache) { - return rewire(dirname, path, cache); - } - - function requireProxy(path) { - if (path === "rewire") { - if (rewireProxyInit === false) { - copyProperties(rewire, rewireProxy); // lazy copy - rewireProxyInit = true; - } - return rewireProxy; - } else { - return internalRequire(path); - } - } - - copyProperties(internalRequire, requireProxy); - - return requireProxy; -}; - -/** - * Scans for global vars and returns an evalable string that declares all globals as a var. - * This way a global variable can be overridden by __set__ without changing the global instance. - * It is executed each time again to include global variables that have been added later. - * - * @return {String} - */ -browserifyRewire.getImportGlobalsSrc = function () { - return getImportGlobalsSrc(['require','module','exports','__dirname','__filename','process']); -}; - -/** - * Returns a new object that inherits from the original module via prototype inheritance. - * - * Any changes to the module, e.g. assigning another exports-object will now modify the object - * instead of original module. - * - * @param {Object} originalModule - * @return {Object} the independent module - */ -browserifyRewire.getIndependentModule = function (originalModule) { - var independentModule; - - function IndependentModule() {} - IndependentModule.prototype = originalModule; - - independentModule = new IndependentModule(); - independentModule.exports = originalModule.exports; - - return independentModule; -}; - -module.exports = browserifyRewire;
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