Fixed unwatchfile method for issue551

src/filesystem/interface.js

@@ -17,7 +17,6 @@ var providers = require('../providers/index.js');
 var Shell = require('../shell/shell.js');
 var Intercom = require('../../lib/intercom.js');
 var FSWatcher = require('../fs-watcher.js');
-//var unwatcher = require('../unwatcherFile.js');
 var Errors = require('../errors.js');
 var defaultGuidFn = require('../shared.js').guid;
 
@@ -166,19 +165,15 @@ function FileSystem(options, callback) {
     }
     listener = listener || nop;
 
-    if(listener == nop){
-      this.removeAllListeners();
+    var unwatcher = new FSWatcher();
+    unwatcher.start(filename, false, options.recursive);
+    if(listener != nop){
+      unwatcher.closeOneListener(filename);
     }
     else{
-      this.off('change', listener);
+      unwatcher.close();
     }
-    /*var unwatch = new unwatchFile();
-    if(listener == nop){
-      unwatch.removeListeners();
-    }
-    else{
-      unwatch.removeSingleListener(listener);
-    }*/
+    return unwatcher;
   };
 
   // Deal with various approaches to node ID creation

src/fs-watcher.js

@@ -1,7 +1,7 @@
 var EventEmitter = require('../lib/eventemitter.js');
 var Path = require('./path.js');
 var Intercom = require('../lib/intercom.js');
-
+var _watchers = {};
 /**
  * FSWatcher based on node.js' FSWatcher
  * see https://github.com/joyent/node/blob/master/lib/fs.js
@@ -45,11 +45,15 @@ function FSWatcher() {
     if(recursive) {
       recursivePathPrefix = filename === '/' ? '/' : filename + '/';
     }
-
+    _watchers[filename] = self;
     var intercom = Intercom.getInstance();
     intercom.on('change', onchange);
   };
 
+  self.closeOneListener = function(filename){
+    _watchers[filename].close();
+  };
+
   self.close = function() {
     var intercom = Intercom.getInstance();
     intercom.off('change', onchange);
@@ -58,5 +62,7 @@ function FSWatcher() {
 }
 FSWatcher.prototype = new EventEmitter();
 FSWatcher.prototype.constructor = FSWatcher;
-
+FSWatcher.getWatcherForFilename = function(filename) {
+  return _watchers[filename];
+};
 module.exports = FSWatcher;