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;;; guix-forge --- Guix software forge meta-service
;;; Copyright © 2022 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of guix-forge.
;;;
;;; guix-forge 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.
;;;
;;; guix-forge 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 guix-forge. If not, see
;;; <https://www.gnu.org/licenses/>.
(define-module (forge build git)
#:use-module (rnrs exceptions)
#:use-module (guix build utils)
#:use-module (guix store)
#:use-module (guix utils)
#:export (download-git-to-store
latest-git-checkout))
;;;
;;; Commentary:
;;;
;;; This module provides build-side code to download a git repository
;;; to the store.
;;;
;;; Code:
(define (hline)
"Print a horizontal line 50 '=' characters long."
(display (make-string 50 #\=))
(newline)
(force-output))
(define* (download-git-to-store store name url branch #:key show-commit?)
"Download BRANCH of git repository from URL to STORE under NAME and
return store path. git and certificates should be in the environment."
(call-with-temporary-directory
(lambda (directory)
(with-directory-excursion directory
(guard (condition ((invoke-error? condition)
(format (current-error-port)
"git-fetch: '~a~{ ~a~}' failed with exit code ~a~%"
(invoke-error-program condition)
(invoke-error-arguments condition)
(invoke-error-exit-status condition))
(exit #f)))
(invoke "git" "clone" "--quiet" "--depth" "1" "--branch" branch url "."))
(when show-commit?
(hline)
(invoke "git" "--no-pager" "log")
(hline))
(delete-file-recursively ".git"))
(add-to-store store name #t "sha256" directory))))
(define latest-git-checkout
(store-lift download-git-to-store))
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