1 ;;; Click --- Command Line Interface Creation Kit for GNU Guile
2 ;;; Copyright © 2021 Javier Sancho <jsf@jsancho.org>
4 ;;; This file is part of Click.
6 ;;; Click is free software; you can redistribute it and/or modify it
7 ;;; under the terms of the GNU General Public License as published by
8 ;;; the Free Software Foundation; either version 3 of the License, or
9 ;;; (at your option) any later version.
11 ;;; Click is distributed in the hope that it will be useful, but
12 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 ;;; General Public License for more details.
16 ;;; You should have received a copy of the GNU General Public License
17 ;;; along with Click. If not, see <http://www.gnu.org/licenses/>.
20 (define-module (click args)
21 #:use-module (ice-9 getopt-long)
22 #:use-module (ice-9 readline)
23 #:use-module (click util)
24 #:export (get-option-default-value
29 (define (parse-args args click-option-spec)
30 "Parse args using an option-spec click formatted"
31 (let ((values (getopt-long args
32 (getopt-long-option-spec click-option-spec)
33 #:stop-at-first-non-option #t)))
37 (define (get-values option-spec values)
38 "Return an associated list with values for all the options in option-spec"
39 (cond ((null? option-spec)
42 (let* ((option (car option-spec))
43 (option-name (car option))
44 (value (get-normalized-value values option option-name)))
45 (cons (cons option-name value)
46 (get-values (cdr option-spec) values))))))
49 (define (get-normalized-value values option option-name)
50 "Get value for option, converting from string to the appropriate value"
51 (let ((convert-proc (assoc-ref (option-type option) 'convert))
52 (value (option-ref values option-name #f)))
53 (cond ((and value (not (option-property option 'flag)))
58 (get-option-default-value option)))))
61 (define* (get-option-default-value option #:optional (no-prompt #f))
62 "Get default value for option, asking user if prompt property is set"
63 (let ((default (option-property option 'default)))
65 (let ((prompt (option-property option 'prompt)))
67 (readline (format #f "~a: " prompt))