// watchCommandFunc executes the "watch" command.
func watchCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
if len(c.Args()) == 0 {
return nil, errors.New("Key required")
}
key := c.Args()[0]
recursive := c.Bool("recursive")
forever := c.Bool("forever")
index := 0
if c.Int("after-index") != 0 {
index = c.Int("after-index") + 1
}
if forever {
sigch := make(chan os.Signal, 1)
signal.Notify(sigch, os.Interrupt)
stop := make(chan bool)
go func() {
<-sigch
os.Exit(0)
}()
receiver := make(chan *etcd.Response)
errCh := make(chan error, 1)
go func() {
_, err := client.Watch(key, uint64(index), recursive, receiver, stop)
errCh <- err
}()
for {
select {
case resp := <-receiver:
printAll(resp, c.GlobalString("output"))
case err := <-errCh:
handleError(-1, err)
}
}
} else {
var resp *etcd.Response
var err error
resp, err = client.Watch(key, uint64(index), recursive, nil, nil)
if err != nil {
handleError(ErrorFromEtcd, err)
}
if err != nil {
return nil, err
}
printAll(resp, c.GlobalString("output"))
}
return nil, nil
}
// execWatchCommandFunc executes the "exec-watch" command.
func execWatchCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
_ = io.Copy
_ = exec.Command
args := c.Args()
argsLen := len(args)
if argsLen < 2 {
return nil, errors.New("Key and command to exec required")
}
key := args[argsLen-1]
cmdArgs := args[:argsLen-1]
index := 0
if c.Int("after-index") != 0 {
index = c.Int("after-index") + 1
key = args[0]
cmdArgs = args[2:]
}
recursive := c.Bool("recursive")
if recursive != false {
key = args[0]
cmdArgs = args[2:]
}
sigch := make(chan os.Signal, 1)
signal.Notify(sigch, os.Interrupt)
stop := make(chan bool)
go func() {
<-sigch
stop <- true
os.Exit(0)
}()
receiver := make(chan *etcd.Response)
client.SetConsistency(etcd.WEAK_CONSISTENCY)
go client.Watch(key, uint64(index), recursive, receiver, stop)
for {
resp := <-receiver
cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
cmd.Env = environResponse(resp, os.Environ())
stdout, err := cmd.StdoutPipe()
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
stderr, err := cmd.StderrPipe()
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
err = cmd.Start()
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
go io.Copy(os.Stdout, stdout)
go io.Copy(os.Stderr, stderr)
cmd.Wait()
}
}