Updated the files.

my-app/node_modules/karma/lib/watcher.js

@@ -0,0 +1,85 @@
+'use strict'
+
+const mm = require('minimatch')
+const braces = require('braces')
+const PatternUtils = require('./utils/pattern-utils')
+
+const helper = require('./helper')
+const log = require('./logger').create('watcher')
+
+const DIR_SEP = require('path').sep
+
+function watchPatterns (patterns, watcher) {
+  let expandedPatterns = []
+  patterns.map((pattern) => {
+    // expand ['a/{b,c}'] to ['a/b', 'a/c']
+    expandedPatterns = expandedPatterns.concat(braces.expand(pattern, { keepEscaping: true }))
+  })
+  expandedPatterns
+    .map(PatternUtils.getBaseDir)
+    .filter((path, index, paths) => paths.indexOf(path) === index) // filter unique values
+    .forEach((path, index, paths) => {
+      if (!paths.some((p) => path.startsWith(p + DIR_SEP))) {
+        watcher.add(path)
+        log.debug(`Watching "${path}"`)
+      }
+    })
+}
+
+function checkAnyPathMatch (patterns, path) {
+  return patterns.some((pattern) => mm(path, pattern, { dot: true }))
+}
+
+function createIgnore (patterns, excludes) {
+  return function (path, stat) {
+    if (stat && !stat.isDirectory()) {
+      return !checkAnyPathMatch(patterns, path) || checkAnyPathMatch(excludes, path)
+    } else {
+      return false
+    }
+  }
+}
+
+function getWatchedPatterns (patterns) {
+  return patterns
+    .filter((pattern) => pattern.watched)
+    .map((pattern) => pattern.pattern)
+}
+
+function watch (patterns, excludes, fileList, usePolling, emitter) {
+  const watchedPatterns = getWatchedPatterns(patterns)
+  // Lazy-load 'chokidar' to make the dependency optional. This is desired when
+  // third-party watchers are in use.
+  const chokidar = require('chokidar')
+  const watcher = new chokidar.FSWatcher({
+    usePolling: usePolling,
+    ignorePermissionErrors: true,
+    ignoreInitial: true,
+    ignored: createIgnore(watchedPatterns, excludes)
+  })
+
+  watchPatterns(watchedPatterns, watcher)
+
+  watcher
+    .on('add', (path) => fileList.addFile(helper.normalizeWinPath(path)))
+    .on('change', (path) => fileList.changeFile(helper.normalizeWinPath(path)))
+    .on('unlink', (path) => fileList.removeFile(helper.normalizeWinPath(path)))
+    .on('error', log.debug.bind(log))
+
+  emitter.on('exit', (done) => {
+    watcher.close()
+    done()
+  })
+
+  return watcher
+}
+
+watch.$inject = [
+  'config.files',
+  'config.exclude',
+  'fileList',
+  'config.usePolling',
+  'emitter'
+]
+
+module.exports = watch