webpack/lib/ContextReplacementPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
var path = require("path");

function ContextReplacementPlugin(resourceRegExp, newContentResource, newContentRecursive, newContentRegExp) {
	this.resourceRegExp = resourceRegExp;
	if(typeof newContentResource !== "string") {
		newContentRegExp = newContentRecursive;
		newContentRecursive = newContentResource;
		newContentResource = undefined;
	}
	if(typeof newContentRecursive !== "boolean") {
		newContentRegExp = newContentRecursive;
		newContentRecursive = undefined;
	}
	this.newContentResource = newContentResource;
	this.newContentRecursive = newContentRecursive;
	this.newContentRegExp = newContentRegExp;
}
module.exports = ContextReplacementPlugin;
ContextReplacementPlugin.prototype.apply = function(compiler) {
	var resourceRegExp = this.resourceRegExp;
	var newContentResource = this.newContentResource;
	var newContentRecursive = this.newContentRecursive;
	var newContentRegExp = this.newContentRegExp;
	compiler.plugin("context-module-factory", function(cmf) {
		cmf.plugin("before-resolve", function(result, callback) {
			if(!result) return callback();
			if(resourceRegExp.test(result.request)) {
				if(typeof newContentResource !== "undefined")
					result.request = newContentResource;
				if(typeof newContentRecursive !== "undefined")
					result.recursive = newContentRecursive;
				if(typeof newContentRegExp !== "undefined")
					result.regExp = newContentRegExp;
			}
			return callback(null, result);
		});
		cmf.plugin("after-resolve", function(result, callback) {
			if(!result) return callback();
			if(resourceRegExp.test(result.resource)) {
				if(typeof newContentResource !== "undefined")
					result.resource = path.resolve(result.resource, newContentResource);
				if(typeof newContentRecursive !== "undefined")
					result.recursive = newContentRecursive;
				if(typeof newContentRegExp !== "undefined")
					result.regExp = newContentRegExp;
			}
			return callback(null, result);
		});
	});
};