Function promptNonInteractiveMultiSelect

pkg/cli/interactive.go:418–477

promptNonInteractiveMultiSelect prints a numbered list and reads comma-separated selections. Each token may be a 1-based index or an option value. An empty input selects nothing.

(scanner *bufio.Scanner, title string, options []struct{ label, value string })

// promptNonInteractiveMultiSelect prints a numbered list and reads comma-separated selections.
// Each token may be a 1-based index or an option value. An empty input selects nothing.
func promptNonInteractiveMultiSelect(scanner *bufio.Scanner, title string, options []struct{ label, value string }) ([]string, error) {
	fmt.Fprintf(os.Stderr, "\n%s\n", title)
	for i, opt := range options {
		fmt.Fprintf(os.Stderr, "  %d) %s\n", i+1, opt.label)
	}
	fmt.Fprintf(os.Stderr, "Enter comma-separated numbers or values (leave blank for none): ")

	if !scanner.Scan() {
		if err := scanner.Err(); err != nil {
			return nil, fmt.Errorf("failed to read input: %w", err)
		}
		// EOF / empty → no selections
		return nil, nil
	}
	input := strings.TrimSpace(scanner.Text())
	if input == "" {
		return nil, nil
	}

	// Build a lookup map for value-based selection
	valueSet := make(map[string]string, len(options))
	for _, opt := range options {
		valueSet[opt.value] = opt.value
	}

	tokens := strings.Split(input, ",")
	seen := make(map[string]struct{}, len(tokens))
	var selected []string
	for _, tok := range tokens {
		tok = strings.TrimSpace(tok)
		if tok == "" {
			continue
		}

		// Try numeric index
		if idx, err := strconv.Atoi(tok); err == nil {
			if idx < 1 || idx > len(options) {
				return nil, fmt.Errorf("selection %d out of range (must be 1-%d)", idx, len(options))
			}
			val := options[idx-1].value
			if _, dup := seen[val]; !dup {
				seen[val] = struct{}{}
				selected = append(selected, val)
			}
			continue
		}

		// Try value directly
		if val, ok := valueSet[tok]; ok {
			if _, dup := seen[val]; !dup {
				seen[val] = struct{}{}
				selected = append(selected, val)
			}
			continue
		}

		return nil, fmt.Errorf("unknown option %q", tok)
	}