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gorun.go
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gorun.go
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// Copyright 2013 The Authors. All rights reserved.
// Use of this source code is governed by a MIT
// license that can be found in the LICENSE file.
//
// Test Run: go run gorun.go
// INSTALL: go install
//
// @Author: wangxian
// @Created: 2013-07-31
//
// Project URL: https://github.com/wangxian/gorun
package main
import (
"flag"
"github.com/fsnotify/fsnotify"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
"sync"
"time"
// "code.google.com/p/go.exp/fsnotify"
)
var (
cmd *exec.Cmd
state sync.Mutex
appname string
// fixed: File change soon
eventTime = make(map[string]time.Time)
)
func Start() {
if appname != "" {
log.Println("Start", appname, "...")
cmd = exec.Command("go", "run", appname)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
go cmd.Run()
} else {
Rebuild()
log.Println("Start project ...")
curpath, _ := os.Getwd()
// log.Println(curpath)
cmd = exec.Command("./" + filepath.Base(curpath))
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
go cmd.Run()
}
}
func Rebuild() {
state.Lock()
defer state.Unlock()
log.Println("Start rebuild project...")
bcmd := exec.Command("go", "build")
bcmd.Stdout = os.Stdout
bcmd.Stderr = os.Stderr
err := bcmd.Run()
if err != nil {
log.Println("============== Rebuild project failed ==============")
return
}
log.Println("Rebuild project success ...")
}
func Stop() {
defer func() {
if e := recover(); e != nil {
log.Println("Kill process error:", e)
}
}()
if cmd != nil {
log.Println("Kill running process:", cmd.Process.Pid)
cmd.Process.Kill()
// // cmd.Process.Release()
// st, _ := cmd.Process.Wait()
// log.Println("Kill process:", st.Exited())
}
}
func Restart() {
Stop()
Start()
}
func Watch() {
path, _ := os.Getwd()
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Fatal(err)
}
defer watcher.Close()
// walk dirs
walkFn := func(path string, info os.FileInfo, err error) error {
// Not watch dir, has .
if info.IsDir() && !strings.Contains(path, ".") {
log.Println("Watch DIR:", path)
err = watcher.Add(path)
if err != nil {
log.Fatal(err)
}
}
return nil
}
if err := filepath.Walk(path, walkFn); err != nil {
log.Println(err)
}
changed := false
for {
select {
case event := <-watcher.Events:
changed = true
if t, ok := eventTime[event.Name]; ok {
if t.Add(time.Millisecond * 3000).After(time.Now()) {
changed = false
}
}
eventTime[event.Name] = time.Now()
log.Println("event", event, "changed=", changed)
if event.Op == fsnotify.Write && strings.Contains(event.Name, ".go") {
println("---------------------------------------------------")
Restart()
}
case err := <-watcher.Errors:
log.Println("error:", err)
}
}
}
func main() {
flag.Parse()
appname = flag.Arg(0)
Start()
Watch()
}