| 61 | } |
| 62 | |
| 63 | func (s *shellReader) readLine(consumer chan lineString) { |
| 64 | s.Lock() |
| 65 | defer s.Unlock() |
| 66 | |
| 67 | // already reading |
| 68 | if s.reading { |
| 69 | return |
| 70 | } |
| 71 | s.reading = true |
| 72 | // start reading |
| 73 | |
| 74 | // detect if print is called to |
| 75 | // prevent readline lib from clearing line. |
| 76 | // use the last line as prompt. |
| 77 | // TODO find better way. |
| 78 | shellPrompt := s.prompt |
| 79 | prompt := s.rlPrompt() |
| 80 | if s.buf.Len() > 0 { |
| 81 | lines := strings.Split(s.buf.String(), "\n") |
| 82 | if p := lines[len(lines)-1]; strings.TrimSpace(p) != "" { |
| 83 | prompt = p |
| 84 | } |
| 85 | s.buf.Truncate(0) |
| 86 | } |
| 87 | |
| 88 | // use printed statement as prompt |
| 89 | s.scanner.SetPrompt(prompt) |
| 90 | |
| 91 | line, err := s.scanner.ReadlineWithDefault(s.defaultInput) |
| 92 | |
| 93 | // reset prompt |
| 94 | s.scanner.SetPrompt(shellPrompt) |
| 95 | |
| 96 | ls := lineString{string(line), err} |
| 97 | consumer <- ls |
| 98 | s.reading = false |
| 99 | } |