86 lines
2.3 KiB
JavaScript
86 lines
2.3 KiB
JavaScript
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'use strict'
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const mm = require('minimatch')
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const braces = require('braces')
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const PatternUtils = require('./utils/pattern-utils')
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const helper = require('./helper')
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const log = require('./logger').create('watcher')
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const DIR_SEP = require('path').sep
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function watchPatterns (patterns, watcher) {
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let expandedPatterns = []
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patterns.map((pattern) => {
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// expand ['a/{b,c}'] to ['a/b', 'a/c']
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expandedPatterns = expandedPatterns.concat(braces.expand(pattern, { keepEscaping: true }))
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})
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expandedPatterns
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.map(PatternUtils.getBaseDir)
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.filter((path, index, paths) => paths.indexOf(path) === index) // filter unique values
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.forEach((path, index, paths) => {
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if (!paths.some((p) => path.startsWith(p + DIR_SEP))) {
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watcher.add(path)
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log.debug(`Watching "${path}"`)
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}
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})
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}
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function checkAnyPathMatch (patterns, path) {
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return patterns.some((pattern) => mm(path, pattern, { dot: true }))
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}
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function createIgnore (patterns, excludes) {
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return function (path, stat) {
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if (stat && !stat.isDirectory()) {
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return !checkAnyPathMatch(patterns, path) || checkAnyPathMatch(excludes, path)
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} else {
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return false
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}
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}
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}
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function getWatchedPatterns (patterns) {
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return patterns
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.filter((pattern) => pattern.watched)
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.map((pattern) => pattern.pattern)
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}
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function watch (patterns, excludes, fileList, usePolling, emitter) {
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const watchedPatterns = getWatchedPatterns(patterns)
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// Lazy-load 'chokidar' to make the dependency optional. This is desired when
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// third-party watchers are in use.
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const chokidar = require('chokidar')
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const watcher = new chokidar.FSWatcher({
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usePolling: usePolling,
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ignorePermissionErrors: true,
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ignoreInitial: true,
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ignored: createIgnore(watchedPatterns, excludes)
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})
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watchPatterns(watchedPatterns, watcher)
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watcher
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.on('add', (path) => fileList.addFile(helper.normalizeWinPath(path)))
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.on('change', (path) => fileList.changeFile(helper.normalizeWinPath(path)))
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.on('unlink', (path) => fileList.removeFile(helper.normalizeWinPath(path)))
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.on('error', log.debug.bind(log))
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emitter.on('exit', (done) => {
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watcher.close()
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done()
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})
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return watcher
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}
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watch.$inject = [
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'config.files',
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'config.exclude',
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'fileList',
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'config.usePolling',
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'emitter'
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]
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module.exports = watch
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