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WatchIgnorePlugin.js
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Sat, Feb 15, 17:20

WatchIgnorePlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { validate } = require("schema-utils");
const schema = require("../schemas/plugins/WatchIgnorePlugin.json");
/** @typedef {import("../declarations/plugins/WatchIgnorePlugin").WatchIgnorePluginOptions} WatchIgnorePluginOptions */
/** @typedef {import("./Compiler")} Compiler */
const IGNORE_TIME_ENTRY = "ignore";
class IgnoringWatchFileSystem {
constructor(wfs, paths) {
this.wfs = wfs;
this.paths = paths;
}
watch(files, dirs, missing, startTime, options, callback, callbackUndelayed) {
files = Array.from(files);
dirs = Array.from(dirs);
const ignored = path =>
this.paths.some(p =>
p instanceof RegExp ? p.test(path) : path.indexOf(p) === 0
);
const notIgnored = path => !ignored(path);
const ignoredFiles = files.filter(ignored);
const ignoredDirs = dirs.filter(ignored);
const watcher = this.wfs.watch(
files.filter(notIgnored),
dirs.filter(notIgnored),
missing,
startTime,
options,
(err, fileTimestamps, dirTimestamps, changedFiles, removedFiles) => {
if (err) return callback(err);
for (const path of ignoredFiles) {
fileTimestamps.set(path, IGNORE_TIME_ENTRY);
}
for (const path of ignoredDirs) {
dirTimestamps.set(path, IGNORE_TIME_ENTRY);
}
callback(
err,
fileTimestamps,
dirTimestamps,
changedFiles,
removedFiles
);
},
callbackUndelayed
);
return {
close: () => watcher.close(),
pause: () => watcher.pause(),
getContextTimeInfoEntries: () => {
const dirTimestamps = watcher.getContextInfoEntries();
for (const path of ignoredDirs) {
dirTimestamps.set(path, IGNORE_TIME_ENTRY);
}
return dirTimestamps;
},
getFileTimeInfoEntries: () => {
const fileTimestamps = watcher.getFileTimeInfoEntries();
for (const path of ignoredFiles) {
fileTimestamps.set(path, IGNORE_TIME_ENTRY);
}
return fileTimestamps;
}
};
}
}
class WatchIgnorePlugin {
/**
* @param {WatchIgnorePluginOptions} options options
*/
constructor(options) {
validate(schema, options, {
name: "Watch Ignore Plugin",
baseDataPath: "options"
});
this.paths = options.paths;
}
/**
* Apply the plugin
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
compiler.hooks.afterEnvironment.tap("WatchIgnorePlugin", () => {
compiler.watchFileSystem = new IgnoringWatchFileSystem(
compiler.watchFileSystem,
this.paths
);
});
}
}
module.exports = WatchIgnorePlugin;

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