;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017, 2020 Sergei Trofimovich <slyfox@inbox.ru>
;;; Copyright © 2021 Sergei Trofimovich <slyich@gmail.com>
;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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.
;;;
;;; GNU Guix 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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages re2c)
  #:use-module (guix licenses)
  #:use-module (guix packages)
  #:use-module (gnu packages python)
  #:use-module (guix download)
  #:use-module (guix build-system gnu))

(define-public re2c
  (package
    (name "re2c")
    (version "2.2")
    (source (origin
             (method url-fetch)
             (uri (string-append "https://github.com/skvadrik/" name
                                 "/releases/download/" version "/"
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
               "1nkbv3bxz1kwwql1pdlnj3lxy5h2vsaif393ivb5b9d8610mxi0g"))))
    (build-system gnu-build-system)
    (home-page "https://re2c.org/")
    (native-inputs
     (list python))             ; for the test driver
    (synopsis "Lexer generator for C/C++")
    (description
     "@code{re2c} generates minimalistic hard-coded state machine (as opposed
to full-featured table-based lexers).  Flexible API allows generated code
to be wired into virtually any environment.  Instead of exposing traditional
@code{yylex()} style API, re2c exposes its internals.  Be sure to take a look
at examples, they cover a lot of real-world cases and shed some light on dark
corners of re2c API.")
    (license public-domain)))
ify 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.
;;;
;;; GNU Guix 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 GNU Guix.  If not, see &lt;http://www.gnu.org/licenses/&gt;.

(define-module (gnu installer newt timezone)
  #:use-module (gnu installer steps)
  #:use-module (gnu installer timezone)
  #:use-module (gnu installer newt page)
  #:use-module (guix i18n)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:use-module (ice-9 match)
  #:use-module (ice-9 receive)
  #:use-module (newt)
  #:export (run-timezone-page))

;; Information textbox width.
(define info-textbox-width (make-parameter 40))

(define (fill-timezones listbox timezones)
  &quot;Fill the given LISTBOX with TIMEZONES. Return an association list
correlating listbox keys with timezones.&quot;
  (map (lambda (timezone)
         (let ((key (append-entry-to-listbox listbox timezone)))
           (cons key timezone)))
       timezones))

(define (run-timezone-page zonetab)
  &quot;Run a page displaying available timezones, grouped by regions. The user is
invited to select a timezone. The selected timezone, under Posix format is
returned.&quot;
  (define (all-but-last list)
    (reverse (cdr (reverse list))))

  (define (run-page timezone-tree)
    (define (loop path)
      ;; XXX: Translation of time zones isn&apos;t perfect here because the
      ;; &quot;iso_3166-1&quot; domain contains translation for &quot;territories&quot; (like
      ;; &quot;Antarctic&quot;) but not for continents (like &quot;Africa&quot;).
      (let ((timezones (locate-children timezone-tree path)))
        (run-listbox-selection-page
         #:title (G_ &quot;Timezone&quot;)
         #:info-text (G_ &quot;Please select a timezone.&quot;)
         #:listbox-items timezones
         #:listbox-item-&gt;text (cut gettext &lt;&gt; &quot;iso_3166-1&quot;)
         #:button-text (if (null? path)
                           (G_ &quot;Exit&quot;)
                           (G_ &quot;Back&quot;))
         #:button-callback-procedure
         (if (null? path)
             (lambda _
               (abort-to-prompt &apos;installer-step &apos;abort))
             (lambda _
               (loop (all-but-last path))))
         #:listbox-callback-procedure
         (lambda (timezone)
           (let* ((timezone* (append path (list timezone)))
                  (tz (timezone-&gt;posix-tz timezone*)))
             (if (timezone-has-child? timezone-tree timezone*)
                 (loop timezone*)
                 tz))))))
    (loop &apos;()))

  (let ((timezone-tree (zonetab-&gt;timezone-tree zonetab)))
    (run-page timezone-tree)))
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