webpack/lib/EvalDevToolModuleTemplatePlugin.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, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
"use strict";

const { RawSource } = require("webpack-sources");
const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");

const cache = new WeakMap();

class EvalDevToolModuleTemplatePlugin {
	constructor(options) {
		this.sourceUrlComment = options.sourceUrlComment || "\n//# sourceURL=[url]";
		this.moduleFilenameTemplate =
			options.moduleFilenameTemplate ||
			"webpack://[namespace]/[resourcePath]?[loaders]";
		this.namespace = options.namespace || "";
	}

	apply(moduleTemplate) {
		moduleTemplate.hooks.module.tap(
			"EvalDevToolModuleTemplatePlugin",
			(source, module) => {
				const cacheEntry = cache.get(source);
				if (cacheEntry !== undefined) return cacheEntry;
				const content = source.source();
				const str = ModuleFilenameHelpers.createFilename(
					module,
					{
						moduleFilenameTemplate: this.moduleFilenameTemplate,
						namespace: this.namespace
					},
					moduleTemplate.runtimeTemplate.requestShortener
				);
				const footer =
					"\n" +
					this.sourceUrlComment.replace(
						/\[url\]/g,
						encodeURI(str)
							.replace(/%2F/g, "/")
							.replace(/%20/g, "_")
							.replace(/%5E/g, "^")
							.replace(/%5C/g, "\\")
							.replace(/^\//, "")
					);
				const result = new RawSource(
					`eval(${JSON.stringify(content + footer)});`
				);
				cache.set(source, result);
				return result;
			}
		);
		moduleTemplate.hooks.hash.tap("EvalDevToolModuleTemplatePlugin", hash => {
			hash.update("EvalDevToolModuleTemplatePlugin");
			hash.update("2");
		});
	}
}

module.exports = EvalDevToolModuleTemplatePlugin;