Example #1
0
// TODO(xiaq): Currently only the editor deals with signals.
func interact() {
	ev, st := newEvalerAndStore()
	datadir, err := store.EnsureDataDir()
	printError(err)
	if err == nil {
		// XXX
		err := ev.Source(datadir + "/rc.elv")
		if err != nil && !os.IsNotExist(err) {
			printError(err)
		}
	}

	cmdNum := 0

	username := "******"
	user, err := user.Current()
	if err == nil {
		username = user.Username
	}
	hostname, err := os.Hostname()
	if err != nil {
		hostname = "???"
	}
	rpromptStr := username + "@" + hostname

	sigch := make(chan os.Signal, sigchSize)
	signal.Notify(sigch)

	ed := edit.NewEditor(os.Stdin, sigch, ev, st)

	for {
		cmdNum++
		name := fmt.Sprintf("<tty %d>", cmdNum)

		prompt := func() string {
			return osutil.Getwd() + "> "
		}
		rprompt := func() string {
			return rpromptStr
		}

		lr := ed.ReadLine(prompt, rprompt)
		// signal.Stop(sigch)

		if lr.EOF {
			break
		} else if lr.Err != nil {
			fmt.Println("Editor error:", lr.Err)
			fmt.Println("My pid is", os.Getpid())
		}

		n, err := parse.Parse(name, lr.Line)
		printError(err)

		if err == nil {
			err := ev.Eval(name, lr.Line, n)
			printError(err)
		}
	}
}
Example #2
0
func interact(ev *eval.Evaler, st *store.Store) {
	// Build Editor.
	sigch := make(chan os.Signal)
	signal.Notify(sigch)
	ed := edit.NewEditor(os.Stdin, sigch, ev, st)

	// Source rc.elv.
	datadir, err := store.EnsureDataDir()
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
	} else {
		source(ev, datadir+"/rc.elv", true)
	}

	// Build readLine function.
	readLine := func() (string, error) {
		return ed.ReadLine()
	}

	cooldown := time.Second
	usingBasic := false
	cmdNum := 0

	for {
		cmdNum++
		// name := fmt.Sprintf("<tty %d>", cmdNum)

		line, err := readLine()

		if err == io.EOF {
			break
		} else if err != nil {
			fmt.Println("Editor error:", err)
			if !usingBasic {
				fmt.Println("Falling back to basic line editor")
				readLine = basicReadLine
				usingBasic = true
			} else {
				fmt.Println("Don't know what to do, pid is", os.Getpid())
				fmt.Println("Restarting editor in", cooldown)
				time.Sleep(cooldown)
				if cooldown < time.Minute {
					cooldown *= 2
				}
			}
			continue
		}

		// No error; reset cooldown.
		cooldown = time.Second

		n, err := parse.Parse(line)
		printError(err, "<interact>", "parse error", line)

		if err == nil {
			err := ev.EvalInteractive(line, n)
			printError(err, "<interact>", "eval error", line)
		}
	}
}
Example #3
0
// TODO(xiaq): Currently only the editor deals with signals.
func interact() {
	ev, st := newEvalerAndStore()

	sigch := make(chan os.Signal, sigchSize)
	signal.Notify(sigch)

	ed := edit.NewEditor(os.Stdin, sigch, ev, st)

	datadir, err := store.EnsureDataDir()
	printError(err)
	if err == nil {
		// XXX
		err := ev.Source(datadir + "/rc.elv")
		if err != nil && !os.IsNotExist(err) {
			printError(err)
		}
	}

	cmdNum := 0

	username := "******"
	user, err := user.Current()
	if err == nil {
		username = user.Username
	}
	hostname, err := os.Hostname()
	if err != nil {
		hostname = "???"
	}
	rpromptStr := username + "@" + hostname
	prompt := func() string {
		return osutil.Getwd() + "> "
	}
	rprompt := func() string {
		return rpromptStr
	}

	readLine := func() edit.LineRead {
		return ed.ReadLine(prompt, rprompt)
	}

	usingBasic := false

	if !sys.IsATTY(0) {
		readLine = basicReadLine
		usingBasic = true
	}

	for {
		cmdNum++
		// name := fmt.Sprintf("<tty %d>", cmdNum)

		lr := readLine()
		// signal.Stop(sigch)

		if lr.EOF {
			break
		} else if lr.Err != nil {
			fmt.Println("Editor error:", lr.Err)
			if !usingBasic {
				fmt.Println("Falling back to basic line editor")
				readLine = basicReadLine
				usingBasic = true
			}
			continue
		}

		n, err := parse.Parse(lr.Line)
		printError(err)

		if err == nil {
			err := ev.EvalInteractive(lr.Line, n)
			printError(err)
		}
	}
}