add watch-detector

Author: stefanpenner

index.js

@@ -4,6 +4,7 @@ const NodeWatcher = require('./src/node_watcher');
 const PollWatcher = require('./src/poll_watcher');
 const WatchmanWatcher = require('./src/watchman_watcher');
 const FSEventsWatcher = require('./src/fsevents_watcher');
+const WatchDetector = require('watch-detector');
 
 function sane(dir, options) {
   options = options || {};
@@ -16,6 +17,18 @@ function sane(dir, options) {
     return new WatchmanWatcher(dir, options);
   } else if (options.fsevents) {
     return new FSEventsWatcher(dir, options);
+  } else if (options.auto) {
+    delete options.auto;
+    const detector = new WatchDetector({
+      fs: require('fs'),
+      root: dir,
+      ui: {
+        writeLine(message) {
+          console.log(message);
+        },
+      },
+    });
+    return sane(dir, detector.findBestWatcherOption(options));
   } else {
     return new NodeWatcher(dir, options);
   }

package.json

@@ -35,7 +35,8 @@
     "micromatch": "^3.1.4",
     "minimist": "^1.1.1",
     "walker": "~1.0.5",
-    "watch": "~0.18.0"
+    "watch": "~0.18.0",
+    "watch-detector": "^0.1.0"
   },
   "devDependencies": {
     "eslint": "^3.19.0",