;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2014, 2016 Ludovic Courtès <ludo@gnu.org> ;;; ;;; 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 build git) #:use-module (guix build utils) #:export (git-fetch)) ;;; Commentary: ;;; ;;; This is the build-side support code of (guix git-download). It allows a ;;; Git repository to be cloned and checked out at a specific commit. ;;; ;;; Code: (define* (git-fetch url commit directory #:key (git-command "git") recursive?) "Fetch COMMIT from URL into DIRECTORY. COMMIT must be a valid Git commit identifier. When RECURSIVE? is true, all the sub-modules of URL are fetched, recursively. Return #t on success, #f otherwise." ;; Disable TLS certificate verification. The hash of the checkout is known ;; in advance anyway. (setenv "GIT_SSL_NO_VERIFY" "true") ;; We cannot use "git clone --recursive" since the following "git checkout" ;; effectively removes sub-module checkouts as of Git 2.6.3. (and (zero? (system* git-command "clone" url directory)) (with-directory-excursion directory (system* git-command "tag" "-l") (and (zero? (system* git-command "checkout" commit)) (begin (when recursive? ;; Now is the time to fetch sub-modules. (unless (zero? (system* git-command "submodule" "update" "--init" "--recursive")) (error "failed to fetch sub-modules" url)) ;; In sub-modules, '.git' is a flat file, not a directory, ;; so we can use 'find-files' here. (for-each delete-file-recursively (find-files directory "^\\.git$"))) ;; The contents of '.git' vary as a function of the current ;; status of the Git repo. Since we want a fixed output, this ;; directory needs to be taken out. (delete-file-recursively ".git") #t))))) ;;; git.scm ends here