409 lines
10 KiB
JavaScript
409 lines
10 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 Stats = require("./Stats");
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/** @typedef {import("../declarations/WebpackOptions").WatchOptions} WatchOptions */
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/** @typedef {import("./Compilation")} Compilation */
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/** @typedef {import("./Compiler")} Compiler */
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/**
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* @template T
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* @callback Callback
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* @param {Error=} err
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* @param {T=} result
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*/
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class Watching {
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/**
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* @param {Compiler} compiler the compiler
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* @param {WatchOptions} watchOptions options
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* @param {Callback<Stats>} handler completion handler
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*/
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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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/** @type {Callback<void>[]} */
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this.callbacks = [];
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/** @type {Callback<void>[] | undefined} */
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this._closeCallbacks = undefined;
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this.closed = false;
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this.suspended = false;
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this.blocked = false;
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this._isBlocked = () => false;
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this._onChange = () => {};
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this._onInvalid = () => {};
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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 = { ...watchOptions };
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} else {
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this.watchOptions = {};
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}
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if (typeof this.watchOptions.aggregateTimeout !== "number") {
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this.watchOptions.aggregateTimeout = 200;
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}
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this.compiler = compiler;
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this.running = false;
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this._initial = true;
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this._invalidReported = true;
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this._needRecords = true;
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this.watcher = undefined;
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this.pausedWatcher = undefined;
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this._done = this._done.bind(this);
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process.nextTick(() => {
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if (this._initial) this._invalidate();
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});
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}
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_go() {
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this._initial = false;
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this.startTime = Date.now();
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this.running = true;
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const run = () => {
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if (this.compiler.idle) {
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return this.compiler.cache.endIdle(err => {
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if (err) return this._done(err);
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this.compiler.idle = false;
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run();
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});
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}
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if (this._needRecords) {
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return this.compiler.readRecords(err => {
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if (err) return this._done(err);
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this._needRecords = false;
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run();
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});
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}
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this.invalid = false;
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this._invalidReported = false;
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this.compiler.hooks.watchRun.callAsync(this.compiler, 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, compilation);
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if (this.invalid) return this._done(null, compilation);
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if (this.compiler.hooks.shouldEmit.call(compilation) === false) {
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return this._done(null, compilation);
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}
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process.nextTick(() => {
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const logger = compilation.getLogger("webpack.Compiler");
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logger.time("emitAssets");
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this.compiler.emitAssets(compilation, err => {
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logger.timeEnd("emitAssets");
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if (err) return this._done(err, compilation);
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if (this.invalid) return this._done(null, compilation);
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logger.time("emitRecords");
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this.compiler.emitRecords(err => {
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logger.timeEnd("emitRecords");
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if (err) return this._done(err, compilation);
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if (compilation.hooks.needAdditionalPass.call()) {
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compilation.needAdditionalPass = true;
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compilation.startTime = this.startTime;
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compilation.endTime = Date.now();
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logger.time("done hook");
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const stats = new Stats(compilation);
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this.compiler.hooks.done.callAsync(stats, err => {
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logger.timeEnd("done hook");
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if (err) return this._done(err, compilation);
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this.compiler.hooks.additionalPass.callAsync(err => {
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if (err) return this._done(err, compilation);
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this.compiler.compile(onCompiled);
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});
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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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};
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this.compiler.compile(onCompiled);
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});
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};
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run();
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}
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/**
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* @param {Compilation} compilation the compilation
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* @returns {Stats} the compilation stats
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*/
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_getStats(compilation) {
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const stats = new Stats(compilation);
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return stats;
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}
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/**
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* @param {Error=} err an optional error
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* @param {Compilation=} compilation the compilation
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* @returns {void}
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*/
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_done(err, compilation) {
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this.running = false;
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const logger = compilation && compilation.getLogger("webpack.Watching");
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let stats = null;
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const handleError = (err, cbs) => {
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this.compiler.hooks.failed.call(err);
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this.compiler.cache.beginIdle();
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this.compiler.idle = true;
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this.handler(err, stats);
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if (!cbs) {
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cbs = this.callbacks;
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this.callbacks = [];
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}
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for (const cb of cbs) cb(err);
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};
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if (
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this.invalid &&
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!this.suspended &&
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!this.blocked &&
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!(this._isBlocked() && (this.blocked = true))
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) {
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if (compilation) {
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logger.time("storeBuildDependencies");
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this.compiler.cache.storeBuildDependencies(
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compilation.buildDependencies,
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err => {
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logger.timeEnd("storeBuildDependencies");
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if (err) return handleError(err);
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this._go();
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}
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);
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} else {
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this._go();
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}
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return;
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}
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if (compilation) {
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compilation.startTime = this.startTime;
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compilation.endTime = Date.now();
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stats = new Stats(compilation);
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}
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if (err) return handleError(err);
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const cbs = this.callbacks;
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this.callbacks = [];
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logger.time("done hook");
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this.compiler.hooks.done.callAsync(stats, err => {
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logger.timeEnd("done hook");
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if (err) return handleError(err, cbs);
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this.handler(null, stats);
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logger.time("storeBuildDependencies");
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this.compiler.cache.storeBuildDependencies(
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compilation.buildDependencies,
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err => {
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logger.timeEnd("storeBuildDependencies");
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if (err) return handleError(err, cbs);
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logger.time("beginIdle");
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this.compiler.cache.beginIdle();
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this.compiler.idle = true;
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logger.timeEnd("beginIdle");
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process.nextTick(() => {
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if (!this.closed) {
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this.watch(
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compilation.fileDependencies,
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compilation.contextDependencies,
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compilation.missingDependencies
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);
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}
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});
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for (const cb of cbs) cb(null);
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this.compiler.hooks.afterDone.call(stats);
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}
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);
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});
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}
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/**
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* @param {Iterable<string>} files watched files
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* @param {Iterable<string>} dirs watched directories
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* @param {Iterable<string>} missing watched existence entries
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* @returns {void}
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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(
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files,
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dirs,
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missing,
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this.startTime,
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this.watchOptions,
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(
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err,
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fileTimeInfoEntries,
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contextTimeInfoEntries,
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changedFiles,
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removedFiles
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) => {
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this.pausedWatcher = this.watcher;
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this.watcher = null;
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if (err) {
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this.compiler.modifiedFiles = undefined;
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this.compiler.removedFiles = undefined;
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this.compiler.fileTimestamps = undefined;
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this.compiler.contextTimestamps = undefined;
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return this.handler(err);
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}
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this.compiler.fileTimestamps = fileTimeInfoEntries;
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this.compiler.contextTimestamps = contextTimeInfoEntries;
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this.compiler.removedFiles = removedFiles;
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this.compiler.modifiedFiles = changedFiles;
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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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this._invalidate();
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this._onChange();
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},
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(fileName, changeTime) => {
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if (!this._invalidReported) {
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this._invalidReported = true;
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this.compiler.hooks.invalid.call(fileName, changeTime);
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}
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this._onInvalid();
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}
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);
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}
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/**
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* @param {Callback<void>=} callback signals when the build has completed again
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* @returns {void}
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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._invalidReported) {
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this._invalidReported = true;
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this.compiler.hooks.invalid.call(null, Date.now());
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}
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this._onChange();
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this._invalidate();
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}
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_invalidate() {
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if (this.suspended) return;
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if (this._isBlocked()) {
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this.blocked = true;
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return;
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}
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if (this.watcher) {
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this.compiler.modifiedFiles =
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this.watcher.getAggregatedChanges &&
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this.watcher.getAggregatedChanges();
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this.compiler.removedFiles =
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this.watcher.getAggregatedRemovals &&
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this.watcher.getAggregatedRemovals();
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this.compiler.fileTimestamps = this.watcher.getFileTimeInfoEntries();
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this.compiler.contextTimestamps =
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this.watcher.getContextTimeInfoEntries();
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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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} else {
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this._go();
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}
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}
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suspend() {
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this.suspended = true;
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}
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resume() {
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if (this.suspended) {
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this.suspended = false;
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this._invalidate();
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}
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}
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/**
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* @param {Callback<void>} callback signals when the watcher is closed
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* @returns {void}
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*/
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close(callback) {
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if (this._closeCallbacks) {
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if (callback) {
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this._closeCallbacks.push(callback);
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}
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return;
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}
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const finalCallback = (err, compilation) => {
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this.running = false;
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this.compiler.running = false;
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this.compiler.watching = undefined;
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this.compiler.watchMode = false;
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this.compiler.modifiedFiles = undefined;
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this.compiler.removedFiles = undefined;
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this.compiler.fileTimestamps = undefined;
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this.compiler.contextTimestamps = undefined;
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const shutdown = () => {
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this.compiler.cache.shutdown(err => {
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this.compiler.hooks.watchClose.call();
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const closeCallbacks = this._closeCallbacks;
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this._closeCallbacks = undefined;
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for (const cb of closeCallbacks) cb(err);
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});
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};
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if (compilation) {
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const logger = compilation.getLogger("webpack.Watching");
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logger.time("storeBuildDependencies");
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this.compiler.cache.storeBuildDependencies(
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compilation.buildDependencies,
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err => {
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logger.timeEnd("storeBuildDependencies");
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shutdown();
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}
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);
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} else {
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shutdown();
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}
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};
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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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this._closeCallbacks = [];
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if (callback) {
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this._closeCallbacks.push(callback);
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}
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if (this.running) {
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this.invalid = true;
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this._done = finalCallback;
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} else {
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finalCallback();
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}
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}
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}
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module.exports = Watching;
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