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211 lines
4.8 KiB
211 lines
4.8 KiB
/*
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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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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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this.suspended = 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 =
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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.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);
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if (this.invalid) return this._done();
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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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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.hooks.needAdditionalPass.call()) {
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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.hooks.done.callAsync(stats, err => {
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if (err) return this._done(err);
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this.compiler.hooks.additionalPass.callAsync(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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});
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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.hooks.failed.call(err);
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this.handler(err, stats);
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return;
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}
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this.compiler.hooks.done.callAsync(stats, () => {
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this.handler(null, stats);
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if (!this.closed) {
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this.watch(
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Array.from(compilation.fileDependencies),
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Array.from(compilation.contextDependencies),
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Array.from(compilation.missingDependencies)
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);
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}
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for (const cb of this.callbacks) cb();
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this.callbacks.length = 0;
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});
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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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filesModified,
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contextModified,
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missingModified,
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fileTimestamps,
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contextTimestamps,
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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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return this.handler(err);
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}
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this.compiler.fileTimestamps = fileTimestamps;
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this.compiler.contextTimestamps = contextTimestamps;
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this.compiler.removedFiles = removedFiles;
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if (!this.suspended) {
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this._invalidate();
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}
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},
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(fileName, changeTime) => {
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this.compiler.hooks.invalid.call(fileName, changeTime);
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}
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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.compiler.fileTimestamps = this.watcher.getFileTimestamps();
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this.compiler.contextTimestamps = this.watcher.getContextTimestamps();
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}
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return this._invalidate();
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}
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_invalidate() {
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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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suspend() {
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this.suspended = true;
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this.invalid = false;
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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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close(callback) {
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const finalCallback = () => {
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this.compiler.hooks.watchClose.call();
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this.compiler.running = false;
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this.compiler.watchMode = false;
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if (callback !== undefined) callback();
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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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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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