mirror of https://github.com/webpack/webpack.git
92 lines
3.2 KiB
JavaScript
92 lines
3.2 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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var path = require("path");
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var AliasPlugin = require("enhanced-resolve/lib/AliasPlugin");
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var ParserHelpers = require("../ParserHelpers");
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var nodeLibsBrowser = require("node-libs-browser");
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function NodeSourcePlugin(options) {
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this.options = options;
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}
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module.exports = NodeSourcePlugin;
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NodeSourcePlugin.prototype.apply = function(compiler) {
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var options = this.options;
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function getPathToModule(module, type) {
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if(type === true || (type === undefined && nodeLibsBrowser[module])) {
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if(!nodeLibsBrowser[module]) throw new Error("No browser version for node.js core module '" + module + "' available");
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return nodeLibsBrowser[module];
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} else if(type === "mock") {
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return require.resolve("node-libs-browser/mock/" + module);
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} else if(type === "empty") {
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return require.resolve("node-libs-browser/mock/empty");
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} else return module;
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}
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function buildExpression(context, pathToModule) {
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var moduleJsPath = path.relative(context, pathToModule);
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if(!/^[A-Z]:/i.test(moduleJsPath)) {
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moduleJsPath = "./" + moduleJsPath.replace(/\\/g, "/");
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}
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return "require(" + JSON.stringify(moduleJsPath) + ")";
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}
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function addExpression(parser, name, module, type, suffix) {
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suffix = suffix || "";
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parser.plugin("expression " + name, function() {
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if(this.state.module && this.state.module.resource === getPathToModule(module, type)) return;
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return ParserHelpers.addParsedVariableToModule(this, name, buildExpression(this.state.module.context, getPathToModule(module, type)) + suffix);
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});
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}
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compiler.plugin("compilation", function(compilation, params) {
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params.normalModuleFactory.plugin("parser", function(parser, parserOptions) {
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if(parserOptions.node === false)
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return;
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var localOptions = options;
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if(parserOptions.node)
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localOptions = Object.assign({}, localOptions, parserOptions.node);
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if(localOptions.global) {
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parser.plugin("expression global", function() {
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return ParserHelpers.addParsedVariableToModule(this, "global", buildExpression(this.state.module.context, require.resolve("../../buildin/global.js")));
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});
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}
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if(localOptions.process) {
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var processType = localOptions.process;
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addExpression(parser, "process", "process", processType);
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}
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if(localOptions.console) {
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var consoleType = localOptions.console;
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addExpression(parser, "console", "console", consoleType);
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}
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var bufferType = localOptions.Buffer;
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if(bufferType) {
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addExpression(parser, "Buffer", "buffer", bufferType, ".Buffer");
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}
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if(localOptions.setImmediate) {
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var setImmediateType = localOptions.setImmediate;
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addExpression(parser, "setImmediate", "timers", setImmediateType, ".setImmediate");
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addExpression(parser, "clearImmediate", "timers", setImmediateType, ".clearImmediate");
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}
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});
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});
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compiler.plugin("after-resolvers", function(compiler) {
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Object.keys(nodeLibsBrowser).forEach(function(lib) {
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if(options[lib] !== false) {
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compiler.resolvers.normal.apply(
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new AliasPlugin("described-resolve", {
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name: lib,
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onlyModule: true,
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alias: getPathToModule(lib, options[lib])
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}, "resolve")
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);
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}
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});
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});
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};
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