Auto scp on file changes

evscp.go

// Copyright (c) 2012, Moritz Bitsch <moritzbitsch@googlemail.com>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

// Just a simple fs event handler, quite usable for realtime directory syncronisation
package main

import (
	"fmt"
	"github.com/sdegutis/go.fsevents"
	"os"
	"os/exec"
	"path/filepath"
)

const matchFlags = fsevents.FlagItemCreated | fsevents.FlagItemModified
var ignoreMe = []string{".DS_Store", "*.swp", "*.swx", "*~"}

func main() {
	var (
		dir, remote string
		err         error
	)

	if len(os.Args) != 3 {
		fmt.Printf("Usage: %s dir remote", os.Args[0])
	}

	dir, remote = os.Args[1], os.Args[2]

	err = os.Chdir(dir)
	if err != nil {
		fmt.Printf("Can't change working directory: %v\n", err)
		return
	}

	dir, err = os.Getwd()
	if err != nil {
		fmt.Printf("Can't get working directory: %v\n", err)
		return
	}

	evs := fsevents.WatchPaths([]string{"."})
	if evs == nil {
		fmt.Println("Can't get fsevents handle, bye")
		return
	}

	for {
		event := <-evs
		for _, ev := range event {
			if (ev.Flags & matchFlags) != 0 {
				rel, err := filepath.Rel(dir, ev.Path)
				if err == nil {
					ignore := false
					for _, ign := range ignoreMe {
						if m, _ := filepath.Match(ign, filepath.Base(rel)); m {
							ignore = true
							break
						}
					}

					if !ignore {
						cmd := exec.Command("scp", "-r", ev.Path, remote+rel)
						fmt.Printf("%s %s %s %s\n", "scp", "-r", ev.Path, remote+rel)
						err = cmd.Run()
						if err != nil {
							fmt.Println(err)
						}
					}
				} else {
					fmt.Println(err)
				}
			}
		}
	}
}