func script(name string) {
file, err := os.Open(name)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
bytes, err := ioutil.ReadAll(file)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if !utf8.Valid(bytes) {
fmt.Fprintf(os.Stderr, "source %v is not valid UTF-8\n", name)
os.Exit(1)
}
src := string(bytes)
ev := eval.NewEvaluator()
n, pe := parse.Parse(name, src)
if pe != nil {
fmt.Print(pe.(*util.ContextualError).Pprint())
os.Exit(1)
}
ee := ev.Eval(name, src, n)
if ee != nil {
fmt.Print(ee.(*util.ContextualError).Pprint())
os.Exit(1)
}
}
// TODO(xiaq): Currently only the editor deals with signals.
func interact() {
ev := eval.NewEvaluator()
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, ev, sigch)
for {
cmdNum++
name := fmt.Sprintf("<tty %d>", cmdNum)
prompt := func() string {
return util.Getwd() + "> "
}
rprompt := func() string {
return rpromptStr
}
lr := ed.ReadLine(prompt, rprompt)
if lr.EOF {
break
} else if lr.Err != nil {
fmt.Println("Editor error:", lr.Err)
fmt.Println("My pid is", os.Getpid())
}
n, pe := parse.Parse(name, lr.Line)
if pe != nil {
fmt.Print(pe.(*util.ContextualError).Pprint())
continue
}
ee := ev.Eval(name, lr.Line, n)
if ee != nil {
fmt.Print(ee.(*util.ContextualError).Pprint())
continue
}
}
}