110 lines
2.7 KiB
JavaScript
110 lines
2.7 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 Watchpack = require("watchpack");
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const objectToMap = require("../util/objectToMap");
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class NodeWatchFileSystem {
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constructor(inputFileSystem) {
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this.inputFileSystem = inputFileSystem;
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this.watcherOptions = {
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aggregateTimeout: 0
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};
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this.watcher = new Watchpack(this.watcherOptions);
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}
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watch(files, dirs, missing, startTime, options, callback, callbackUndelayed) {
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if (!Array.isArray(files)) {
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throw new Error("Invalid arguments: 'files'");
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}
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if (!Array.isArray(dirs)) {
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throw new Error("Invalid arguments: 'dirs'");
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}
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if (!Array.isArray(missing)) {
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throw new Error("Invalid arguments: 'missing'");
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}
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if (typeof callback !== "function") {
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throw new Error("Invalid arguments: 'callback'");
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}
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if (typeof startTime !== "number" && startTime) {
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throw new Error("Invalid arguments: 'startTime'");
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}
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if (typeof options !== "object") {
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throw new Error("Invalid arguments: 'options'");
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}
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if (typeof callbackUndelayed !== "function" && callbackUndelayed) {
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throw new Error("Invalid arguments: 'callbackUndelayed'");
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}
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const oldWatcher = this.watcher;
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this.watcher = new Watchpack(options);
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if (callbackUndelayed) {
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this.watcher.once("change", callbackUndelayed);
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}
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const cachedFiles = files;
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const cachedDirs = dirs;
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this.watcher.once("aggregated", (changes, removals) => {
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changes = changes.concat(removals);
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if (this.inputFileSystem && this.inputFileSystem.purge) {
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this.inputFileSystem.purge(changes);
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}
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const times = objectToMap(this.watcher.getTimes());
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files = new Set(files);
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dirs = new Set(dirs);
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missing = new Set(missing);
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removals = new Set(removals.filter(file => files.has(file)));
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callback(
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null,
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changes.filter(file => files.has(file)).sort(),
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changes.filter(file => dirs.has(file)).sort(),
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changes.filter(file => missing.has(file)).sort(),
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times,
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times,
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removals
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);
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});
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this.watcher.watch(
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cachedFiles.concat(missing),
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cachedDirs.concat(missing),
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startTime
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);
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if (oldWatcher) {
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oldWatcher.close();
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}
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return {
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close: () => {
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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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},
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pause: () => {
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if (this.watcher) {
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this.watcher.pause();
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}
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},
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getFileTimestamps: () => {
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if (this.watcher) {
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return objectToMap(this.watcher.getTimes());
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} else {
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return new Map();
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}
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},
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getContextTimestamps: () => {
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if (this.watcher) {
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return objectToMap(this.watcher.getTimes());
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} else {
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return new Map();
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}
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}
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};
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}
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}
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module.exports = NodeWatchFileSystem;
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