package main import ( "bufio" "github.com/chrislusf/weed-fs/go/glog" "fmt" "os" ) func init() { cmdShell.Run = runShell // break init cycle } var cmdShell = &Command{ UsageLine: "shell", Short: "run interactive commands, now just echo", Long: `run interactive commands. `, } var () func runShell(command *Command, args []string) bool { r := bufio.NewReader(os.Stdin) o := bufio.NewWriter(os.Stdout) e := bufio.NewWriter(os.Stderr) prompt := func() { var err error if _, err = o.WriteString("> "); err != nil { glog.V(0).Infoln("error writing to stdout:", err) } if err = o.Flush(); err != nil { glog.V(0).Infoln("error flushing stdout:", err) } } readLine := func() string { ret, err := r.ReadString('\n') if err != nil { fmt.Fprint(e, err) os.Exit(1) } return ret } execCmd := func(cmd string) int { if cmd != "" { if _, err := o.WriteString(cmd); err != nil { glog.V(0).Infoln("error writing to stdout:", err) } } return 0 } cmd := "" for { prompt() cmd = readLine() execCmd(cmd) } }