chushihua

node_modules/webpack/lib/HashedModuleIdsPlugin.js

@@ -0,0 +1,42 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+const createHash = require("crypto").createHash;
+
+class HashedModuleIdsPlugin {
+	constructor(options) {
+		this.options = Object.assign({
+			hashFunction: "md5",
+			hashDigest: "base64",
+			hashDigestLength: 4
+		}, options);
+	}
+
+	apply(compiler) {
+		const options = this.options;
+		compiler.plugin("compilation", (compilation) => {
+			const usedIds = new Set();
+			compilation.plugin("before-module-ids", (modules) => {
+				modules.forEach((module) => {
+					if(module.id === null && module.libIdent) {
+						const id = module.libIdent({
+							context: this.options.context || compiler.options.context
+						});
+						const hash = createHash(options.hashFunction);
+						hash.update(id);
+						const hashId = hash.digest(options.hashDigest);
+						let len = options.hashDigestLength;
+						while(usedIds.has(hashId.substr(0, len)))
+							len++;
+						module.id = hashId.substr(0, len);
+						usedIds.add(module.id);
+					}
+				});
+			});
+		});
+	}
+}
+
+module.exports = HashedModuleIdsPlugin;