Hi, do we support read multiple lines until ctrl+d to generate an io.EOF

[hitzhangjie]

I use promptui to let user input the issue title and body, the body part contains multiple lines.

So I think it would be better to support multiple lines in our utility.

I don't know whether prompui has supported this feature or not.

[hitzhangjie]

the readline repo only reads a single line.

I found another repo, like https://github.com/chzyer/readline/blob/master/example/readline-multiline/readline-multiline.go, which supports read multiple lines. It looks like easy to support it.

If this feature meets the design of promptui?

---

1. add a config option to prompt.Prmopt{} like ReadMultiLine bool
2. if this option is true, then keep readling lines until an io.EOF is found

[hitzhangjie]

Now I don't think read multiple lines is a good idea, considering the use cases is limited and not convenient to modify the input.

Maybe launch an editor then read the content is better and easier.

[hitzhangjie]

I'll close this.

[Steve Coffman]

I wondered how to do this as well:

// GetMultiLineInput - an empty line terminated with a ctrl-D or ASCII Group Separator Ctrl-] and newline
func GetMultiLineInput(scn *bufio.Scanner) string {
	var lines []string
	terminator := false

	for scn.Scan() {
		line := scn.Text()
		if len(line) == 1 {
			// ASCII Group Separator (GS ^]): ctrl-]
			if strings.HasSuffix(line, "\x1D") || strings.HasSuffix(line, "\x04") {
				trimLine := strings.TrimSuffix(line, "\x1D")
				if !(trimLine == "") {
					lines = append(lines, trimLine)
				}
				terminator = true
				break
			}
		}
		lines = append(lines, line)
	}

	if err := scn.Err(); err != nil {
		_, _ = fmt.Fprintln(os.Stderr, err)
		return strings.Join(lines, "\n")
	}
	// If we didn't break out of the scan loop
	// due to a Group Separator input character on an empty line
	// then we need to append the last line that had the EOF (Ctrl-D) character
	if !terminator {
		lines = append(lines, scn.Text())
	}

	return strings.Join(lines, "\n")
}

If you drop the ASCII Group Separator Ctrl-] requirement, you can simplify the code.