guix/scripts/search.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
   3 ;;;
   4 ;;; This file is part of GNU Guix.
   5 ;;;
   6 ;;; GNU Guix 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 (at
   9 ;;; your option) any later version.
  10 ;;;
  11 ;;; GNU Guix 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
  14 ;;; GNU General Public License for more details.
  15 ;;;
  16 ;;; You should have received a copy of the GNU General Public License
  17 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 (define-module (guix scripts search)
  20   #:use-module (guix ui)
  21   #:use-module (guix scripts package)
  22   #:use-module (guix scripts)
  23   #:use-module (srfi srfi-1)
  24   #:use-module (srfi srfi-26)
  25   #:use-module (srfi srfi-37)
  26   #:export (guix-search))
  27
  28 (define (show-help)
  29   (display (G_ "Usage: guix search [OPTION] REGEXPS...
  30 Search for packages matching REGEXPS."))
  31   (display (G_"
  32 This is an alias for 'guix package -s'.\n"))
  33   (newline)
  34   (display (G_ "
  35   -h, --help             display this help and exit"))
  36   (display (G_ "
  37   -V, --version          display version information and exit"))
  38   (newline)
  39   (show-bug-report-information))
  40
  41 (define %options
  42   ;; Specification of the command-line options.
  43   (list (option '(#\h "help") #f #f
  44                 (lambda args
  45                   (show-help)
  46                   (exit 0)))
  47         (option '(#\V "version") #f #f
  48                 (lambda args
  49                   (show-version-and-exit "guix search")))))
  50
  51 (define (guix-search . args)
  52   (define (handle-argument arg result)
  53     ;; Treat all non-option arguments as regexps.
  54     (cons `(query search ,(or arg ""))
  55           result))
  56
  57   (define opts
  58     (args-fold* args %options
  59                 (lambda (opt name arg . rest)
  60                   (leave (G_ "~A: unrecognized option~%") name))
  61                 handle-argument
  62                 '()))
  63
  64   (unless (assoc-ref opts 'query)
  65     (leave (G_ "missing arguments: no regular expressions to search for~%")))
  66
  67   (guix-package* opts))