guix/scripts/show.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2019 Simon Tournier <zimon.toutoune@gmail.com>
   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 show)
  20   #:use-module (guix ui)
  21   #:use-module (guix scripts package)
  22   #:use-module ((guix scripts build)
  23                 #:select (%standard-build-options))
  24   #:use-module (guix scripts)
  25   #:use-module (srfi srfi-1)
  26   #:use-module (srfi srfi-26)
  27   #:use-module (srfi srfi-37)
  28   #:export (guix-show))
  29
  30 (define (show-help)
  31   (display (G_ "Usage: guix show [OPTION] PACKAGE...
  32 Show details about PACKAGE."))
  33   (display (G_"
  34 This is an alias for 'guix package --show='.\n"))
  35   (newline)
  36   (display (G_ "
  37   -h, --help             display this help and exit"))
  38   (display (G_ "
  39   -V, --version          display version information and exit"))
  40   (newline)
  41   (display (G_ "
  42   -L, --load-path=DIR    prepend DIR to the package module search path"))
  43   (newline)
  44   (show-bug-report-information))
  45
  46 (define %options
  47   ;; Specification of the command-line options.
  48   (list (option '(#\h "help") #f #f
  49                 (lambda args
  50                   (show-help)
  51                   (exit 0)))
  52         (option '(#\V "version") #f #f
  53                 (lambda args
  54                   (show-version-and-exit "guix show")))
  55
  56         (find (lambda (option)
  57                 (member "load-path" (option-names option)))
  58               %standard-build-options)))
  59
  60 (define (guix-show . args)
  61   (define (handle-argument arg result)
  62     ;; Treat all non-option arguments as regexps.
  63     (cons `(query show ,arg)
  64           result))
  65
  66   (define opts
  67     (args-fold* args %options
  68                 (lambda (opt name arg . rest)
  69                   (leave (G_ "~A: unrecognized option~%") name))
  70                 handle-argument
  71                 '()))
  72
  73   (unless (assoc-ref opts 'query)
  74     (leave (G_ "missing arguments: no package to show~%")))
  75
  76   (guix-package* opts))