vue hello world项目
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3 years ago
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const asyncLib = require("neo-async");
/** @typedef {import("./MultiCompiler")} MultiCompiler */
/** @typedef {import("./Watching")} Watching */
/**
* @template T
* @callback Callback
* @param {(Error | null)=} err
* @param {T=} result
*/
class MultiWatching {
/**
* @param {Watching[]} watchings child compilers' watchers
* @param {MultiCompiler} compiler the compiler
*/
constructor(watchings, compiler) {
this.watchings = watchings;
this.compiler = compiler;
}
invalidate(callback) {
if (callback) {
asyncLib.each(
this.watchings,
(watching, callback) => watching.invalidate(callback),
callback
);
} else {
for (const watching of this.watchings) {
watching.invalidate();
}
}
}
suspend() {
for (const watching of this.watchings) {
watching.suspend();
}
}
resume() {
for (const watching of this.watchings) {
watching.resume();
}
}
/**
* @param {Callback<void>} callback signals when the watcher is closed
* @returns {void}
*/
close(callback) {
asyncLib.forEach(
this.watchings,
(watching, finishedCallback) => {
watching.close(finishedCallback);
},
err => {
this.compiler.hooks.watchClose.call();
if (typeof callback === "function") {
this.compiler.running = false;
callback(err);
}
}
);
}
}
module.exports = MultiWatching;