webpack/lib/webworker/WebWorkerMainTemplatePlugin.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 Template = require("../Template");

function WebWorkerMainTemplatePlugin() {
}
module.exports = WebWorkerMainTemplatePlugin;

WebWorkerMainTemplatePlugin.prototype.apply = function(mainTemplate) {
	mainTemplate.plugin("local-vars", function(source, chunk, hash) {
		if(chunk.chunks.length > 0) {
			return this.asString([
				source,
				"",
				"// object to store loaded chunks",
				'// "1" means "already loaded"',
				"var installedChunks = {",
				this.indent(
					chunk.ids.map(function(id) {
						return id + ":1"
					}).join(",\n")
				),
				"};"
			]);
		}
		return source;
	});
	mainTemplate.plugin("require-ensure", function(_, chunk, hash) {
		var filename = this.outputOptions.filename || "bundle.js";
		var chunkFilename = this.outputOptions.chunkFilename || "[id]." + filename;
		return this.asString([
			"// \"1\" is the signal for \"already loaded\"",
			"if(!installedChunks[chunkId]) {",
			this.indent([
				"importScripts(" +
					this.applyPluginsWaterfall("asset-path", JSON.stringify(chunkFilename), {
						hash: "\" + " + this.renderCurrentHashCode(hash) + " + \"",
						chunk: {
							id: "\" + chunkId + \""
						}
					}) + ");"
			]),
			"}",
			"callback.call(null, " + this.requireFn + ");"
		]);
	});
	mainTemplate.plugin("bootstrap", function(source, chunk, hash) {
		if(chunk.chunks.length > 0) {
			var chunkCallbackName = this.outputOptions.chunkCallbackName || Template.toIdentifier("webpackChunk" + (this.outputOptions.library || ""));
			return this.asString([
				source,
				"this[" + JSON.stringify(chunkCallbackName) + "] = function webpackChunkCallback(chunkIds, moreModules) {",
				this.indent([
					"for(var moduleId in moreModules) {",
					this.indent(this.renderAddModule(hash, chunk, "moduleId", "moreModules[moduleId]")),
					"}",
					"while(chunkIds.length)",
					this.indent("installedChunks[chunkIds.pop()] = 1;")
				]),
				"};"
			]);
		}
		return source;
	});
	mainTemplate.plugin("hash", function(hash) {
		hash.update("webworker");
		hash.update("3");
		hash.update(this.outputOptions.publicPath + "");
		hash.update(this.outputOptions.filename + "");
		hash.update(this.outputOptions.chunkFilename + "");
		hash.update(this.outputOptions.chunkCallbackName + "");
		hash.update(this.outputOptions.library + "");
	});
};