1  'use strict';
 2  
 3  const NodeWatcher = require('./src/node_watcher');
 4  const PollWatcher = require('./src/poll_watcher');
 5  const WatchmanWatcher = require('./src/watchman_watcher');
 6  const WatchexecWatcher = require('./src/watchexec_watcher');
 7  
 8  function throwNoFSEventsSupports() {
 9    throw new Error('Sane >= 4 no longer support the fsevents module.');
10  }
11  
12  function sane(dir, options) {
13    options = options || {};
14    if (options.watcher) {
15      const WatcherClass = require(options.watcher);
16      return new WatcherClass(dir, options);
17    } else if (options.poll) {
18      return new PollWatcher(dir, options);
19    } else if (options.watchman) {
20      return new WatchmanWatcher(dir, options);
21    } else if (options.watchexec) {
22      return new WatchexecWatcher(dir, options);
23    } else if (options.fsevents) {
24      throwNoFSEventsSupports();
25    } else {
26      return new NodeWatcher(dir, options);
27    }
28  }
29  
30  module.exports = sane;
31  sane.NodeWatcher = NodeWatcher;
32  sane.PollWatcher = PollWatcher;
33  sane.WatchmanWatcher = WatchmanWatcher;
34  sane.WatchexecWatcher = WatchexecWatcher;
35  
36  Object.defineProperty(sane, 'FSEventsWatcher', {
37    get() {
38      return throwNoFSEventsSupports();
39    },
40  });