*: initial pass at fsnotify

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

app.go

@@ -0,0 +1,72 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !plan9
+
+package main
+
+import (
+	"flag"
+	"log"
+
+	"github.com/fsnotify/fsnotify"
+)
+
+/*
+29044  2016-09-21 12:40:21 cd x
+29045  2016-09-21 12:40:25 touch file
+29046  2016-09-21 12:40:39 rm file
+29047  2016-09-21 12:40:42 touch file
+29048  2016-09-21 12:40:50 echo farts > file
+29049  2016-09-21 12:40:57 rm file
+
+produces:
+$ ./sync_pass x
+2016/09/21 12:40:25 event: "x/file": CREATE
+2016/09/21 12:40:25 event: "x/file": CHMOD
+2016/09/21 12:40:39 event: "x/file": REMOVE
+2016/09/21 12:40:42 event: "x/file": CREATE
+2016/09/21 12:40:42 event: "x/file": CHMOD
+2016/09/21 12:40:50 event: "x/file": WRITE
+2016/09/21 12:40:50 modified file: x/file
+2016/09/21 12:40:50 event: "x/file": WRITE
+2016/09/21 12:40:50 modified file: x/file
+2016/09/21 12:40:57 event: "x/file": REMOVE
+*/
+func main() {
+	flag.Parse()
+
+	for _, arg := range flag.Args() {
+		WathPath(arg)
+	}
+}
+
+func WathPath(path string) {
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer watcher.Close()
+
+	done := make(chan bool)
+	go func() {
+		for {
+			select {
+			case event := <-watcher.Events:
+				log.Println("event:", event)
+				if event.Op&fsnotify.Write == fsnotify.Write {
+					log.Println("modified file:", event.Name)
+				}
+			case err := <-watcher.Errors:
+				log.Println("error:", err)
+			}
+		}
+	}()
+
+	err = watcher.Add(path)
+	if err != nil {
+		log.Fatal(err)
+	}
+	<-done
+}