fix watching for not-existent directories

lib/DirectoryWatcher.js

@@ -23,6 +23,7 @@ function Watcher(directoryWatcher, filePath, startTime) {
 	this.directoryWatcher = directoryWatcher;
 	this.path = filePath;
 	this.startTime = startTime && +startTime;
+	// TODO this.data seem to be only read, weird
 	this.data = 0;
 }
 
@@ -72,6 +73,7 @@ function DirectoryWatcher(directoryPath, options) {
 	this.initialScanRemoved = [];
 	this.doInitialScan();
 	this.watchers = Object.create(null);
+	this.parentWatcher = null;
 	this.refs = 0;
 }
 module.exports = DirectoryWatcher;
@@ -142,6 +144,11 @@ DirectoryWatcher.prototype.setDirectory = function setDirectory(directoryPath, e
 						w.emit("change", directoryPath, w.data, initial ? "initial" : type);
 					});
 				}
+				if(this.watchers[withoutCase(directoryPath) + "#directory"]) {
+					this.watchers[withoutCase(directoryPath) + "#directory"].forEach(function(w) {
+						w.emit("change", w.data, initial ? "initial" : type);
+					});
+				}
 			}
 		} else {
 			if(!exist) {
@@ -153,6 +160,11 @@ DirectoryWatcher.prototype.setDirectory = function setDirectory(directoryPath, e
 						w.emit("change", directoryPath, w.data, initial ? "initial" : type);
 					});
 				}
+				if(this.watchers[withoutCase(directoryPath) + "#directory"]) {
+					this.watchers[withoutCase(directoryPath) + "#directory"].forEach(function(w) {
+						w.emit("change", directoryPath, w.data, initial ? "initial" : type);
+					});
+				}
 			}
 		}
 	}
@@ -274,6 +286,14 @@ DirectoryWatcher.prototype.onWatcherError = function onWatcherError(/* err */) {
 DirectoryWatcher.prototype.doInitialScan = function doInitialScan() {
 	fs.readdir(this.path, function(err, items) {
 		if(err) {
+			this.parentWatcher = watcherManager.watchFile(this.path + "#directory", this.options, 1);
+			this.parentWatcher.on("change", function(mtime, type) {
+				if(this.watchers[withoutCase(this.path)]) {
+					this.watchers[withoutCase(this.path)].forEach(function(w) {
+						w.emit("change", this.path, mtime, type);
+					});
+				}
+			}.bind(this));
 			this.initialScan = false;
 			return;
 		}
@@ -340,6 +360,7 @@ DirectoryWatcher.prototype.close = function() {
 			this.directories[dir].close();
 		}, this);
 	}
+	if(this.parentWatcher) this.parentWatcher.close();
 	this.emit("closed");
 };