196 lines
7.2 KiB
Scheme
196 lines
7.2 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix scripts describe)
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#:use-module ((guix config) #:select (%guix-version))
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#:use-module ((guix ui) #:hide (display-profile-content))
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#:use-module (guix channels)
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#:use-module (guix scripts)
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#:use-module (guix describe)
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#:use-module (guix profiles)
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#:use-module ((guix scripts pull) #:select (display-profile-content))
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#:use-module (git)
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#:use-module (json)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-37)
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#:use-module (ice-9 match)
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#:autoload (ice-9 pretty-print) (pretty-print)
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#:export (guix-describe))
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;;;
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;;; Command-line options.
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;;;
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(define %options
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;; Specifications of the command-line options.
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(list (option '(#\f "format") #t #f
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(lambda (opt name arg result)
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(unless (member arg '("human" "channels" "json" "recutils"))
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(leave (G_ "~a: unsupported output format~%") arg))
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(alist-cons 'format (string->symbol arg) result)))
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(option '(#\p "profile") #t #f
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(lambda (opt name arg result)
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(alist-cons 'profile (canonicalize-profile arg)
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result)))
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(option '(#\h "help") #f #f
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(lambda args
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(show-help)
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(exit 0)))
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(option '(#\V "version") #f #f
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(lambda args
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(show-version-and-exit "guix describe")))))
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(define %default-options
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;; Alist of default option values.
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'((format . human)))
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(define (show-help)
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(display (G_ "Usage: guix describe [OPTION]...
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Display information about the channels currently in use.\n"))
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(display (G_ "
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-f, --format=FORMAT display information in the given FORMAT"))
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(display (G_ "
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-p, --profile=PROFILE display information about PROFILE"))
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(newline)
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(display (G_ "
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-h, --help display this help and exit"))
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(display (G_ "
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-V, --version display version information and exit"))
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(newline)
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(show-bug-report-information))
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(define (display-package-search-path fmt)
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"Display GUIX_PACKAGE_PATH, if it is set, according to FMT."
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(match (getenv "GUIX_PACKAGE_PATH")
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(#f #t)
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(string
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(match fmt
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('human
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(format #t "~%GUIX_PACKAGE_PATH=\"~a\"~%" string))
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('channels
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(format #t (G_ "~%;; warning: GUIX_PACKAGE_PATH=\"~a\"~%")
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string))
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(_
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(warning (G_ "'GUIX_PACKAGE_PATH' is set but it is not captured~%")))))))
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(define (channel->sexp channel)
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`(channel
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(name ',(channel-name channel))
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(url ,(channel-url channel))
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(commit ,(channel-commit channel))))
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(define (channel->json channel)
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(scm->json-string `((name . ,(channel-name channel))
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(url . ,(channel-url channel))
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(commit . ,(channel-commit channel)))))
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(define (channel->recutils channel port)
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(format port "name: ~a~%" (channel-name channel))
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(format port "url: ~a~%" (channel-url channel))
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(format port "commit: ~a~%" (channel-commit channel)))
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(define (display-checkout-info fmt)
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"Display information about the current checkout according to FMT, a symbol
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denoting the requested format. Exit if the current directory does not lie
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within a Git checkout."
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(let* ((program (car (command-line)))
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(directory (catch 'git-error
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(lambda ()
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(repository-discover (dirname program)))
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(lambda (key err)
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(report-error (G_ "failed to determine origin~%"))
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(display-hint (format #f (G_ "Perhaps this
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@command{guix} command was not obtained with @command{guix pull}? Its version
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string is ~a.~%")
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%guix-version))
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(exit 1))))
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(repository (repository-open directory))
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(head (repository-head repository))
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(commit (oid->string (reference-target head))))
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(match fmt
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('human
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(format #t (G_ "Git checkout:~%"))
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(format #t (G_ " repository: ~a~%") (dirname directory))
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(format #t (G_ " branch: ~a~%") (reference-shorthand head))
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(format #t (G_ " commit: ~a~%") commit))
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('channels
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(pretty-print `(list ,(channel->sexp (channel (name 'guix)
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(url (dirname directory))
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(commit commit))))))
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('json
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(display (channel->json (channel (name 'guix)
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(url (dirname directory))
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(commit commit))))
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(newline))
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('recutils
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(channel->recutils (channel (name 'guix)
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(url (dirname directory))
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(commit commit))
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(current-output-port))))
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(display-package-search-path fmt)))
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(define (display-profile-info profile fmt)
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"Display information about PROFILE, a profile as created by (guix channels),
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in the format specified by FMT."
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(define number
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(generation-number profile))
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(define channels
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(profile-channels (if (zero? number)
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profile
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(generation-file-name profile number))))
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(match fmt
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('human
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(display-profile-content profile number))
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('channels
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(pretty-print `(list ,@(map channel->sexp channels))))
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('json
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(format #t "[~a]~%" (string-join (map channel->json channels) ",")))
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('recutils
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(format #t "~{~a~%~}"
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(map (lambda (channel)
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(with-output-to-string
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(lambda ()
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(channel->recutils channel (current-output-port)))))
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channels))))
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(display-package-search-path fmt))
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;;;
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;;; Entry point.
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;;;
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(define (guix-describe . args)
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(let* ((opts (args-fold* args %options
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(lambda (opt name arg result)
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(leave (G_ "~A: unrecognized option~%")
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name))
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cons
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%default-options))
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(format (assq-ref opts 'format))
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(profile (or (assq-ref opts 'profile) (current-profile))))
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(with-error-handling
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(match profile
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(#f
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(display-checkout-info format))
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(profile
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(display-profile-info (canonicalize-profile profile) format))))))
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