webpack/lib/SetVarMainTemplatePlugin.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 ConcatSource = require("webpack-core/lib/ConcatSource");

function SetVarMainTemplatePlugin(varExpression, copyObject) {
	this.varExpression = varExpression;
	this.copyObject = copyObject;
}
module.exports = SetVarMainTemplatePlugin;
SetVarMainTemplatePlugin.prototype.apply = function(mainTemplate) {
	mainTemplate.plugin("render", function(source, chunk, hash) {
		var varExpression = mainTemplate.applyPluginsWaterfall("asset-path", this.varExpression, {
			hash: hash,
			chunk: chunk
		});
		if(this.copyObject) {
			return new ConcatSource("(function(e, a) { for(var i in a) e[i] = a[i]; }(" +
				varExpression + ", ", source, "))");
		} else {
			var prefix = varExpression + " =\n";
			return new ConcatSource(prefix, source);
		}
	}.bind(this));
	mainTemplate.plugin("global-hash-paths", function (paths) {
		if (this.varExpression) paths.push(this.varExpression);
		return paths;
	});
	mainTemplate.plugin("hash", function(hash) {
		hash.update("set var");
		hash.update(this.varExpression + "");
		hash.update(this.copyObject + "");
	}.bind(this));
};