diff options
Diffstat (limited to 'guix/build/git.scm')
| -rw-r--r-- | guix/build/git.scm | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/guix/build/git.scm b/guix/build/git.scm index deda10fee8..0ff263c81b 100644 --- a/guix/build/git.scm +++ b/guix/build/git.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2014, 2016, 2019 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2014, 2016, 2019, 2023 Ludovic Courtès <ludo@gnu.org> ;;; ;;; This file is part of GNU Guix. ;;; @@ -18,9 +18,12 @@ (define-module (guix build git) #:use-module (guix build utils) + #:autoload (guix build download-nar) (download-nar) + #:autoload (guix swh) (%verify-swh-certificate? swh-download) #:use-module (srfi srfi-34) #:use-module (ice-9 format) - #:export (git-fetch)) + #:export (git-fetch + git-fetch-with-fallback)) ;;; Commentary: ;;; @@ -76,4 +79,41 @@ recursively. Return #t on success, #f otherwise." (delete-file-recursively ".git") #t))) + +(define* (git-fetch-with-fallback url commit directory + #:key (git-command "git") recursive?) + "Like 'git-fetch', fetch COMMIT from URL into DIRECTORY, but fall back to +alternative methods when fetching from URL fails: attempt to download a nar, +and if that also fails, download from the Software Heritage archive." + (or (git-fetch url commit directory + #:recursive? recursive? + #:git-command git-command) + (download-nar directory) + + ;; As a last resort, attempt to download from Software Heritage. + ;; Disable X.509 certificate verification to avoid depending + ;; on nss-certs--we're authenticating the checkout anyway. + ;; XXX: Currently recursive checkouts are not supported. + (and (not recursive?) + (parameterize ((%verify-swh-certificate? #f)) + (format (current-error-port) + "Trying to download from Software Heritage...~%") + + (swh-download url commit directory) + (when (file-exists? + (string-append directory "/.gitattributes")) + ;; Perform CR/LF conversion and other changes + ;; specificied by '.gitattributes'. + (invoke git-command "-C" directory "init") + (invoke git-command "-C" directory "config" "--local" + "user.email" "you@example.org") + (invoke git-command "-C" directory "config" "--local" + "user.name" "Your Name") + (invoke git-command "-C" directory "add" ".") + (invoke git-command "-C" directory "commit" "-am" "init") + (invoke git-command "-C" directory "read-tree" "--empty") + (invoke git-command "-C" directory "reset" "--hard") + (delete-file-recursively + (string-append directory "/.git"))))))) + ;;; git.scm ends here |