chushihua

node_modules/webpack/lib/ProvidePlugin.js

@@ -0,0 +1,55 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const ParserHelpers = require("./ParserHelpers");
+const ConstDependency = require("./dependencies/ConstDependency");
+
+const NullFactory = require("./NullFactory");
+
+class ProvidePlugin {
+	constructor(definitions) {
+		this.definitions = definitions;
+	}
+
+	apply(compiler) {
+		const definitions = this.definitions;
+		compiler.plugin("compilation", (compilation, params) => {
+			compilation.dependencyFactories.set(ConstDependency, new NullFactory());
+			compilation.dependencyTemplates.set(ConstDependency, new ConstDependency.Template());
+			params.normalModuleFactory.plugin("parser", (parser, parserOptions) => {
+				Object.keys(definitions).forEach(name => {
+					var request = [].concat(definitions[name]);
+					var splittedName = name.split(".");
+					if(splittedName.length > 0) {
+						splittedName.slice(1).forEach((_, i) => {
+							const name = splittedName.slice(0, i + 1).join(".");
+							parser.plugin(`can-rename ${name}`, ParserHelpers.approve);
+						});
+					}
+					parser.plugin(`expression ${name}`, function(expr) {
+						let nameIdentifier = name;
+						const scopedName = name.indexOf(".") >= 0;
+						let expression = `require(${JSON.stringify(request[0])})`;
+						if(scopedName) {
+							nameIdentifier = `__webpack_provided_${name.replace(/\./g, "_dot_")}`;
+						}
+						if(request.length > 1) {
+							expression += request.slice(1).map(r => `[${JSON.stringify(r)}]`).join("");
+						}
+						if(!ParserHelpers.addParsedVariableToModule(this, nameIdentifier, expression)) {
+							return false;
+						}
+						if(scopedName) {
+							ParserHelpers.toConstantDependency(nameIdentifier).bind(this)(expr);
+						}
+						return true;
+					});
+				});
+			});
+		});
+	}
+}
+module.exports = ProvidePlugin;