webpack/lib/EvalSourceMapDevToolModuleTemplatePlugin.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 RawSource = require("webpack-core/lib/RawSource");
var ModuleFilenameHelpers = require("./ModuleFilenameHelpers");

function EvalSourceMapDevToolModuleTemplatePlugin(compilation, sourceMapComment, moduleFilenameTemplate) {
	this.compilation = compilation;
	this.sourceMapComment = sourceMapComment || "//@ sourceMappingURL=[url]";
	this.moduleFilenameTemplate = moduleFilenameTemplate || "webpack:///[resource-path]?[hash]";
}
module.exports = EvalSourceMapDevToolModuleTemplatePlugin;

EvalSourceMapDevToolModuleTemplatePlugin.prototype.apply = function(moduleTemplate) {
	var self = this;
	moduleTemplate.plugin("module", function(source, module, chunk) {
		var content = source.source();
		var sourceMap = source.map();
		if(!sourceMap) {
			return source;
		}
		var modules = sourceMap.sources.map(function(source) {
			var module = self.compilation.findModule(source);
			return module || source;
		});
		var moduleFilenames = modules.map(function(module) {
			return ModuleFilenameHelpers.createFilename(module, self.moduleFilenameTemplate, this.requestShortener);
		}, this);
		moduleFilenames = ModuleFilenameHelpers.replaceDuplicates(moduleFilenames, function(filename, i, n) {
			for(var j = 0; j < n; j++)
				filename += "*";
			return filename;
		});
		sourceMap.sources = moduleFilenames;
		if(sourceMap.sourcesContent) {
			sourceMap.sourcesContent = sourceMap.sourcesContent.map(function(content, i) {
				return content + "\n\n\n" + ModuleFilenameHelpers.createFooter(modules[i], this.requestShortener);
			}, this);
		}
		sourceMap.sourceRoot = "";
		sourceMap.file = module.id + ".js";
		var footer = self.sourceMapComment.replace(/\[url\]/g, "data:application/json;base64," + new Buffer(JSON.stringify(sourceMap)).toString("base64"));
		return new RawSource("eval(" + JSON.stringify(content + footer) + ");" );
	});
	moduleTemplate.plugin("hash", function(hash) {
		hash.update("eval-source-map");
		hash.update("1");
	});
};