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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
;;;
;;; 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 (guix scripts describe)
#:use-module ((guix config) #:select (%guix-version))
#:use-module ((guix ui) #:hide (display-profile-content))
#:use-module (guix channels)
#:use-module (guix scripts)
#:use-module (guix describe)
#:use-module (guix profiles)
#:use-module ((guix scripts pull) #:select (display-profile-content))
#:use-module (git)
#:use-module (json)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
#:autoload (ice-9 pretty-print) (pretty-print)
#:export (guix-describe))
;;;
;;; Command-line options.
;;;
(define %options
;; Specifications of the command-line options.
(list (option '(#\f "format") #t #f
(lambda (opt name arg result)
(unless (member arg '("human" "channels" "json" "recutils"))
(leave (G_ "~a: unsupported output format~%") arg))
(alist-cons 'format (string->symbol arg) result)))
(option '(#\p "profile") #t #f
(lambda (opt name arg result)
(alist-cons 'profile (canonicalize-profile arg)
result)))
(option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix describe")))))
(define %default-options
;; Alist of default option values.
'((format . human)))
(define (show-help)
(display (G_ "Usage: guix describe [OPTION]...
Display information about the channels currently in use.\n"))
(display (G_ "
-f, --format=FORMAT display information in the given FORMAT"))
(display (G_ "
-p, --profile=PROFILE display information about PROFILE"))
(newline)
(display (G_ "
-h, --help display this help and exit"))
(display (G_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define (display-package-search-path fmt)
"Display GUIX_PACKAGE_PATH, if it is set, according to FMT."
(match (getenv "GUIX_PACKAGE_PATH")
(#f #t)
(string
(match fmt
('human
(format #t "~%GUIX_PACKAGE_PATH=\"~a\"~%" string))
('channels
(format #t (G_ "~%;; warning: GUIX_PACKAGE_PATH=\"~a\"~%")
string))
(_
(warning (G_ "'GUIX_PACKAGE_PATH' is set but it is not captured~%")))))))
(define (channel->sexp channel)
`(channel
(name ',(channel-name channel))
(url ,(channel-url channel))
(commit ,(channel-commit channel))))
(define (channel->json channel)
(scm->json-string `((name . ,(channel-name channel))
(url . ,(channel-url channel))
(commit . ,(channel-commit channel)))))
(define (channel->recutils channel port)
(format port "name: ~a~%" (channel-name channel))
(format port "url: ~a~%" (channel-url channel))
(format port "commit: ~a~%" (channel-commit channel)))
(define (display-checkout-info fmt)
"Display information about the current checkout according to FMT, a symbol
denoting the requested format. Exit if the current directory does not lie
within a Git checkout."
(let* ((program (car (command-line)))
(directory (catch 'git-error
(lambda ()
(repository-discover (dirname program)))
(lambda (key err)
(report-error (G_ "failed to determine origin~%"))
(display-hint (format #f (G_ "Perhaps this
@command{guix} command was not obtained with @command{guix pull}? Its version
string is ~a.~%")
%guix-version))
(exit 1))))
(repository (repository-open directory))
(head (repository-head repository))
(commit (oid->string (reference-target head))))
(match fmt
('human
(format #t (G_ "Git checkout:~%"))
(format #t (G_ " repository: ~a~%") (dirname directory))
(format #t (G_ " branch: ~a~%") (reference-shorthand head))
(format #t (G_ " commit: ~a~%") commit))
('channels
(pretty-print `(list ,(channel->sexp (channel (name 'guix)
(url (dirname directory))
(commit commit))))))
('json
(display (channel->json (channel (name 'guix)
(url (dirname directory))
(commit commit))))
(newline))
('recutils
(channel->recutils (channel (name 'guix)
(url (dirname directory))
(commit commit))
(current-output-port))))
(display-package-search-path fmt)))
(define (display-profile-info profile fmt)
"Display information about PROFILE, a profile as created by (guix channels),
in the format specified by FMT."
(define number
(generation-number profile))
(define channels
(profile-channels (if (zero? number)
profile
(generation-file-name profile number))))
(match fmt
('human
(display-profile-content profile number))
('channels
(pretty-print `(list ,@(map channel->sexp channels))))
('json
(format #t "[~a]~%" (string-join (map channel->json channels) ",")))
('recutils
(format #t "~{~a~%~}"
(map (lambda (channel)
(with-output-to-string
(lambda ()
(channel->recutils channel (current-output-port)))))
channels))))
(display-package-search-path fmt))
;;;
;;; Entry point.
;;;
(define (guix-describe . args)
(let* ((opts (args-fold* args %options
(lambda (opt name arg result)
(leave (G_ "~A: unrecognized option~%")
name))
cons
%default-options))
(format (assq-ref opts 'format))
(profile (or (assq-ref opts 'profile) (current-profile))))
(with-error-handling
(match profile
(#f
(display-checkout-info format))
(profile
(display-profile-info (canonicalize-profile profile) format))))))
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