mirror of https://github.com/webpack/webpack.git
530 lines
15 KiB
JavaScript
530 lines
15 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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"use strict";
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const path = require("path");
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const Tapable = require("tapable");
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const Compilation = require("./Compilation");
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const Stats = require("./Stats");
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const NormalModuleFactory = require("./NormalModuleFactory");
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const ContextModuleFactory = require("./ContextModuleFactory");
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const makePathsRelative = require("./util/identifier").makePathsRelative;
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class Watching {
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constructor(compiler, watchOptions, handler) {
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this.startTime = null;
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this.invalid = false;
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this.handler = handler;
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this.callbacks = [];
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this.closed = false;
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if(typeof watchOptions === "number") {
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this.watchOptions = {
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aggregateTimeout: watchOptions
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};
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} else if(watchOptions && typeof watchOptions === "object") {
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this.watchOptions = Object.assign({}, watchOptions);
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} else {
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this.watchOptions = {};
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}
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this.watchOptions.aggregateTimeout = this.watchOptions.aggregateTimeout || 200;
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this.compiler = compiler;
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this.running = true;
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this.compiler.readRecords(err => {
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if(err) return this._done(err);
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this._go();
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});
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}
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_go() {
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this.startTime = Date.now();
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this.running = true;
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this.invalid = false;
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this.compiler.applyPluginsAsync("watch-run", this, err => {
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if(err) return this._done(err);
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const onCompiled = (err, compilation) => {
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if(err) return this._done(err);
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if(this.invalid) return this._done();
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if(this.compiler.applyPluginsBailResult("should-emit", compilation) === false) {
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return this._done(null, compilation);
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}
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this.compiler.emitAssets(compilation, err => {
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if(err) return this._done(err);
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if(this.invalid) return this._done();
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this.compiler.emitRecords(err => {
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if(err) return this._done(err);
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if(compilation.applyPluginsBailResult("need-additional-pass")) {
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compilation.needAdditionalPass = true;
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const stats = new Stats(compilation);
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stats.startTime = this.startTime;
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stats.endTime = Date.now();
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this.compiler.applyPlugins("done", stats);
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this.compiler.applyPluginsAsync("additional-pass", err => {
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if(err) return this._done(err);
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this.compiler.compile(onCompiled);
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});
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return;
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}
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return this._done(null, compilation);
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});
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});
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};
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this.compiler.compile(onCompiled);
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});
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}
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_getStats(compilation) {
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const stats = new Stats(compilation);
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stats.startTime = this.startTime;
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stats.endTime = Date.now();
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return stats;
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}
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_done(err, compilation) {
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this.running = false;
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if(this.invalid) return this._go();
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const stats = compilation ? this._getStats(compilation) : null;
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if(err) {
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this.compiler.applyPlugins("failed", err);
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this.handler(err, stats);
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return;
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}
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this.compiler.applyPlugins("done", stats);
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this.handler(null, stats);
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if(!this.closed) {
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this.watch(compilation.fileDependencies, compilation.contextDependencies, compilation.missingDependencies);
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}
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this.callbacks.forEach(cb => cb());
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this.callbacks.length = 0;
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}
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watch(files, dirs, missing) {
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this.pausedWatcher = null;
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this.watcher = this.compiler.watchFileSystem.watch(files, dirs, missing, this.startTime, this.watchOptions, (err, filesModified, contextModified, missingModified, fileTimestamps, contextTimestamps) => {
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this.pausedWatcher = this.watcher;
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this.watcher = null;
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if(err) return this.handler(err);
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this.compiler.fileTimestamps = fileTimestamps;
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this.compiler.contextTimestamps = contextTimestamps;
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this.invalidate();
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}, (fileName, changeTime) => {
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this.compiler.applyPlugins("invalid", fileName, changeTime);
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});
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}
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invalidate(callback) {
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if(callback) {
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this.callbacks.push(callback);
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}
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if(this.watcher) {
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this.pausedWatcher = this.watcher;
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this.watcher.pause();
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this.watcher = null;
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}
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if(this.running) {
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this.invalid = true;
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return false;
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} else {
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this._go();
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}
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}
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close(callback) {
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if(callback === undefined) callback = function() {};
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this.closed = true;
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if(this.watcher) {
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this.watcher.close();
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this.watcher = null;
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}
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if(this.pausedWatcher) {
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this.pausedWatcher.close();
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this.pausedWatcher = null;
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}
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if(this.running) {
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this.invalid = true;
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this._done = () => {
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this.compiler.applyPlugins("watch-close");
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callback();
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};
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} else {
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this.compiler.applyPlugins("watch-close");
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callback();
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}
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}
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}
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class Compiler extends Tapable {
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constructor() {
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super();
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this.outputPath = "";
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this.outputFileSystem = null;
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this.inputFileSystem = null;
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this.recordsInputPath = null;
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this.recordsOutputPath = null;
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this.records = {};
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this.fileTimestamps = {};
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this.contextTimestamps = {};
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this.resolvers = {
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normal: null,
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loader: null,
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context: null
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};
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let deprecationReported = false;
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this.parser = {
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plugin: (hook, fn) => {
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if(!deprecationReported) {
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console.warn("webpack: Using compiler.parser is deprecated.\n" +
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"Use compiler.plugin(\"compilation\", function(compilation, data) {\n data.normalModuleFactory.plugin(\"parser\", function(parser, options) { parser.plugin(/* ... */); });\n}); instead. " +
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"It was called " + new Error().stack.split("\n")[2].trim() + ".");
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deprecationReported = true;
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}
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this.plugin("compilation", (compilation, data) => {
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data.normalModuleFactory.plugin("parser", parser => {
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parser.plugin(hook, fn);
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});
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});
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},
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apply: () => {
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const args = arguments;
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if(!deprecationReported) {
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console.warn("webpack: Using compiler.parser is deprecated.\n" +
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"Use compiler.plugin(\"compilation\", function(compilation, data) {\n data.normalModuleFactory.plugin(\"parser\", function(parser, options) { parser.apply(/* ... */); });\n}); instead. " +
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"It was called " + new Error().stack.split("\n")[2].trim() + ".");
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deprecationReported = true;
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}
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this.plugin("compilation", (compilation, data) => {
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data.normalModuleFactory.plugin("parser", parser => {
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parser.apply.apply(parser, args);
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});
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});
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}
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};
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this.options = {};
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}
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watch(watchOptions, handler) {
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this.fileTimestamps = {};
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this.contextTimestamps = {};
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const watching = new Watching(this, watchOptions, handler);
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return watching;
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}
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run(callback) {
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const startTime = Date.now();
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const onCompiled = (err, compilation) => {
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if(err) return callback(err);
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if(this.applyPluginsBailResult("should-emit", compilation) === false) {
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const stats = new Stats(compilation);
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stats.startTime = startTime;
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stats.endTime = Date.now();
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this.applyPlugins("done", stats);
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return callback(null, stats);
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}
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this.emitAssets(compilation, err => {
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if(err) return callback(err);
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if(compilation.applyPluginsBailResult("need-additional-pass")) {
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compilation.needAdditionalPass = true;
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const stats = new Stats(compilation);
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stats.startTime = startTime;
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stats.endTime = Date.now();
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this.applyPlugins("done", stats);
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this.applyPluginsAsync("additional-pass", err => {
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if(err) return callback(err);
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this.compile(onCompiled);
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});
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return;
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}
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this.emitRecords(err => {
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if(err) return callback(err);
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const stats = new Stats(compilation);
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stats.startTime = startTime;
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stats.endTime = Date.now();
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this.applyPlugins("done", stats);
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return callback(null, stats);
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});
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});
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};
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this.applyPluginsAsync("before-run", this, err => {
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if(err) return callback(err);
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this.applyPluginsAsync("run", this, err => {
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if(err) return callback(err);
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this.readRecords(err => {
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if(err) return callback(err);
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this.compile(onCompiled);
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});
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});
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});
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}
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runAsChild(callback) {
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this.compile((err, compilation) => {
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if(err) return callback(err);
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this.parentCompilation.children.push(compilation);
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Object.keys(compilation.assets).forEach(name => {
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this.parentCompilation.assets[name] = compilation.assets[name];
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});
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const entries = Object.keys(compilation.entrypoints).map(name => {
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return compilation.entrypoints[name].chunks;
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}).reduce((array, chunks) => {
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return array.concat(chunks);
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}, []);
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return callback(null, entries, compilation);
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});
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}
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purgeInputFileSystem() {
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if(this.inputFileSystem && this.inputFileSystem.purge)
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this.inputFileSystem.purge();
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}
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emitAssets(compilation, callback) {
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let outputPath;
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const emitFiles = (err) => {
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if(err) return callback(err);
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require("async").forEach(Object.keys(compilation.assets), (file, callback) => {
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let targetFile = file;
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const queryStringIdx = targetFile.indexOf("?");
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if(queryStringIdx >= 0) {
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targetFile = targetFile.substr(0, queryStringIdx);
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}
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const writeOut = (err) => {
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if(err) return callback(err);
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const targetPath = this.outputFileSystem.join(outputPath, targetFile);
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const source = compilation.assets[file];
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if(source.existsAt === targetPath) {
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source.emitted = false;
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return callback();
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}
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let content = source.source();
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if(!Buffer.isBuffer(content)) {
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content = new Buffer(content, "utf8"); // eslint-disable-line
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}
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source.existsAt = targetPath;
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source.emitted = true;
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this.outputFileSystem.writeFile(targetPath, content, callback);
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};
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if(targetFile.match(/\/|\\/)) {
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const dir = path.dirname(targetFile);
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this.outputFileSystem.mkdirp(this.outputFileSystem.join(outputPath, dir), writeOut);
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} else writeOut();
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}, err => {
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if(err) return callback(err);
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afterEmit.call(this);
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});
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};
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this.applyPluginsAsync("emit", compilation, err => {
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if(err) return callback(err);
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outputPath = compilation.getPath(this.outputPath);
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this.outputFileSystem.mkdirp(outputPath, emitFiles);
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});
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function afterEmit() {
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this.applyPluginsAsyncSeries1("after-emit", compilation, err => {
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if(err) return callback(err);
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return callback();
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});
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}
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}
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emitRecords(callback) {
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if(!this.recordsOutputPath) return callback();
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const idx1 = this.recordsOutputPath.lastIndexOf("/");
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const idx2 = this.recordsOutputPath.lastIndexOf("\\");
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let recordsOutputPathDirectory = null;
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if(idx1 > idx2) recordsOutputPathDirectory = this.recordsOutputPath.substr(0, idx1);
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if(idx1 < idx2) recordsOutputPathDirectory = this.recordsOutputPath.substr(0, idx2);
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if(!recordsOutputPathDirectory) return writeFile.call(this);
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this.outputFileSystem.mkdirp(recordsOutputPathDirectory, err => {
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if(err) return callback(err);
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writeFile.call(this);
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});
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function writeFile() {
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this.outputFileSystem.writeFile(this.recordsOutputPath, JSON.stringify(this.records, undefined, 2), callback);
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}
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}
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readRecords(callback) {
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if(!this.recordsInputPath) {
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this.records = {};
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return callback();
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}
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this.inputFileSystem.stat(this.recordsInputPath, err => {
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// It doesn't exist
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// We can ignore this.
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if(err) return callback();
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this.inputFileSystem.readFile(this.recordsInputPath, (err, content) => {
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if(err) return callback(err);
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try {
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this.records = JSON.parse(content.toString("utf-8"));
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} catch(e) {
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e.message = "Cannot parse records: " + e.message;
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return callback(e);
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}
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return callback();
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});
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});
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}
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createChildCompiler(compilation, compilerName, compilerIndex, outputOptions, plugins) {
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const childCompiler = new Compiler();
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if(Array.isArray(plugins)) {
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plugins.forEach(plugin => childCompiler.apply(plugin));
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}
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for(const name in this._plugins) {
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if(["make", "compile", "emit", "after-emit", "invalid", "done", "this-compilation"].indexOf(name) < 0)
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childCompiler._plugins[name] = this._plugins[name].slice();
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}
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childCompiler.name = compilerName;
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childCompiler.outputPath = this.outputPath;
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childCompiler.inputFileSystem = this.inputFileSystem;
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childCompiler.outputFileSystem = null;
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childCompiler.resolvers = this.resolvers;
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childCompiler.fileTimestamps = this.fileTimestamps;
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childCompiler.contextTimestamps = this.contextTimestamps;
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const relativeCompilerName = makePathsRelative(this.context, compilerName);
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if(!this.records[relativeCompilerName]) this.records[relativeCompilerName] = [];
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if(this.records[relativeCompilerName][compilerIndex])
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childCompiler.records = this.records[relativeCompilerName][compilerIndex];
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else
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this.records[relativeCompilerName].push(childCompiler.records = {});
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if(this.cache) {
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if(!this.cache.children) this.cache.children = {};
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if(!this.cache.children[compilerName]) this.cache.children[compilerName] = [];
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if(this.cache.children[compilerName][compilerIndex])
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childCompiler.cache = this.cache.children[compilerName][compilerIndex];
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else
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this.cache.children[compilerName].push(childCompiler.cache = {});
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}
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childCompiler.options = Object.create(this.options);
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childCompiler.options.output = Object.create(childCompiler.options.output);
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for(const name in outputOptions) {
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childCompiler.options.output[name] = outputOptions[name];
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}
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childCompiler.parentCompilation = compilation;
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return childCompiler;
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}
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isChild() {
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return !!this.parentCompilation;
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}
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createCompilation() {
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return new Compilation(this);
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}
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newCompilation(params) {
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const compilation = this.createCompilation();
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compilation.fileTimestamps = this.fileTimestamps;
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compilation.contextTimestamps = this.contextTimestamps;
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compilation.name = this.name;
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compilation.records = this.records;
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compilation.compilationDependencies = params.compilationDependencies;
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this.applyPlugins("this-compilation", compilation, params);
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this.applyPlugins("compilation", compilation, params);
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return compilation;
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}
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createNormalModuleFactory() {
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const normalModuleFactory = new NormalModuleFactory(this.options.context, this.resolvers, this.options.module || {});
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this.applyPlugins("normal-module-factory", normalModuleFactory);
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return normalModuleFactory;
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}
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createContextModuleFactory() {
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const contextModuleFactory = new ContextModuleFactory(this.resolvers, this.inputFileSystem);
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this.applyPlugins("context-module-factory", contextModuleFactory);
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return contextModuleFactory;
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}
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newCompilationParams() {
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const params = {
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normalModuleFactory: this.createNormalModuleFactory(),
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contextModuleFactory: this.createContextModuleFactory(),
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compilationDependencies: []
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};
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return params;
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}
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compile(callback) {
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const params = this.newCompilationParams();
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this.applyPluginsAsync("before-compile", params, err => {
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if(err) return callback(err);
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this.applyPlugins("compile", params);
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const compilation = this.newCompilation(params);
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this.applyPluginsParallel("make", compilation, err => {
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if(err) return callback(err);
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compilation.finish();
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compilation.seal(err => {
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if(err) return callback(err);
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this.applyPluginsAsync("after-compile", compilation, err => {
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if(err) return callback(err);
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return callback(null, compilation);
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});
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});
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});
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});
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}
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}
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Compiler.Watching = Watching;
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module.exports = Compiler;
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