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#!/bin/sh
#-*-Scheme-*-
GUIX="${GUIX:-$(command -v guix)}"
if [ -z "$GUIX" ]; then
echo "Missing guix executable."
exit 1
fi
exec env GUILE_AUTO_COMPILE=0 $GUIX repl -- "$0" "$@"
!#
;;; SPDX-License-Identifier: LGPL-3.0-or-later
;;; SPDX-FileCopyrightText: 2026 Sergio Pastor Pérez <sergio.pastor-perez@inria.fr>
;;; SPDX-FileCopyrightText: 2026 Romain Garbage <romain.garbage@inria.fr>
;;;
;;; tag-release.scm --- Tag commits for Guix Science releases.
;;;
;;; Commentary:
;;;
;;; This utility aims to ease the tagging of commits intended for making
;;; releases following the Guix Science requirements.
;;;
;;; Code:
(use-modules (guix channels)
(guix describe)
(guix diagnostics)
(guix i18n)
(ice-9 popen)
(ice-9 pretty-print)
(ice-9 rdelim)
(ice-9 regex)
(srfi srfi-1)
(srfi srfi-37))
(define %version "0.0.1")
(define %this-channel
(channel
(name 'guix-science)
(url "https://codeberg.org/guix-science/guix-science.git")
(branch "master")
(introduction
(make-channel-introduction
"b1fe5aaff3ab48e798a4cce02f0212bc91f423dc"
(openpgp-fingerprint
"CA4F 8CF4 37D7 478F DA05 5FD4 4213 7701 1A37 8446")))))
(define help-message
"Usage: ~a [OPTIONS]... TAG
Where TAG has the following format `vYYYYMMDD'.
OPTIONS:
--commit=COMMIT the commit where to place the TAG
--guix=COMMIT the Guix commit to associate with the release
Report bugs to: <https://codeberg.org/guix-science/guix-science/issues>
")
(define %options
(let ((display-and-exit-proc
(lambda (msg . rest)
(lambda _
(apply format (cons* #t msg rest)) (quit)))))
(list (option '("commit") #t #f
(lambda (opt name arg result)
(alist-cons 'commit arg result)))
(option '("guix") #t #f
(lambda (opt name arg result)
(alist-cons 'guix arg result)))
(option '(#\v "version") #f #f
(display-and-exit-proc "tag-release version v~a\n" %version))
(option '(#\h "help") #f #f
(display-and-exit-proc help-message #f)))))
;;; Helpers
(define (current-guix-channel)
"Retrieve the current Guix channel as seen by `guix describe'."
(find (lambda (channel)
(equal? (channel-name channel) 'guix))
(current-channels)))
(define (current-commit)
"Return commit as seen by the current working directory."
(string-trim-both (run-command "git" "rev-parse" "HEAD")))
(define (make-channels-message tag commit guix-commit)
"Generate channels file using COMMIT and GUIX-COMMIT."
(let* ((this-pinned (channel
(inherit %this-channel)
(commit commit)))
(guix-pinned (channel
(inherit (current-guix-channel))
(commit guix-commit)))
(pinned-channels (call-with-output-string
(lambda (port)
(pretty-print
`(list ,@(map channel->code (list this-pinned guix-pinned)))
port)))))
(format #f "\
;; Guix-Science release ~a
;;
;; Guix revision: ~a
~a" tag guix-commit pinned-channels)))
(define (check-tag-format tag)
"Check that TAG follows the `vYYYYMMDD' pattern."
(unless (string-match "^v[0-9]{8}$" tag)
(leave (G_ "TAG must follow the `vYYYYMMDD' pattern, got `~a'~%") tag))
tag)
(define (check-commit-format commit)
"Check that COMMIT looks like a valid Git commit hash."
(unless (string-match "^[0-9a-fA-F]{40}$" commit)
(leave (G_ "COMMIT must be a valid Git commit hash, got `~a'~%") commit))
commit)
(define (run-command prog . args)
"Invoke PROGRAM with the given ARGS."
(let* ((port (apply open-pipe* OPEN_READ prog args))
(output (read-string port))
(status (close-pipe port))
(exit-code (status:exit-val status)))
(values output exit-code)))
;;; Main
(define (main args)
(define (parse-args args)
(args-fold (cdr args)
%options
(lambda (opt name arg loads)
(error "Unrecognized option `~A'" name))
(lambda (arg result)
(when (assoc-ref result 'argument)
(error "Only 1 argument for TAG accepted"))
(alist-cons 'argument arg result))
'()))
(let* ((arguments (parse-args args))
(tag (and=> (or (assoc-ref arguments 'argument)
(begin
(display help-message)
(leave (G_ "missing tag argument~%"))))
check-tag-format))
(commit (and=> (or (assoc-ref arguments 'commit)
(current-commit))
check-commit-format))
(guix-commit (and=> (or (assoc-ref arguments 'guix)
(channel-commit (current-guix-channel)))
check-commit-format))
(message (make-channels-message tag commit guix-commit)))
(call-with-values
(lambda ()
(run-command "git" "tag" "--annotate" "--sign" "-m" message tag commit))
(lambda (_ exit-code)
(exit exit-code)))))
(main (command-line))
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