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;; gitto -- Keep track of your git repositories
;; Copyright (C) 2012 Tom Willemse <tom at ryuslash dot org>
;; This file is part of gitto.
;; gitto is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; gitto is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with gitto. If not, see <http://www.gnu.org/licenses/>.
(define-module (gitto ui)
#:use-module (ice-9 rdelim)
#:export (y-or-n?))
(define* (y-or-n? prompt #:key (default #f))
(format #t "~a [~a] " prompt (if default "Y/n" "y/N"))
(let ((char (read-char)))
;; Clear the rest of the input buffer.
(unless (eq? char #\newline)
(read-line))
(case char
((#\y #\Y #\newline) #t)
((#\n #\N) #f)
(else
(display "Invalid response, please use `y' or `n'.")
(newline)
(y-or-n? prompt #:default default)))))
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