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| author | Ludovic Courtès <ludo@gnu.org> | 2021-02-08 22:23:09 +0100 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2021-02-08 23:50:35 +0100 |
| commit | 18a4882e3029a084d2f0c63d9d0148682a854546 (patch) | |
| tree | 9d55ad63a78597abd9dd891c90337a01644b0c46 /guix | |
| parent | 7c1a30f563b001202d6df5e566c5db54fe7d3625 (diff) | |
docker: Pass '--hard-dereference' to 'tar' to ensure reproducible builds.
Reported by zimoun at
<https://lists.gnu.org/archive/html/guix-devel/2021-02/msg00053.html>.
* guix/docker.scm (%tar-determinism-options): Add '--hard-dereference'.
Co-authored-by: zimoun <zimon.toutoune@gmail.com>
Diffstat (limited to 'guix')
| -rw-r--r-- | guix/docker.scm | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/guix/docker.scm b/guix/docker.scm index 97ac6d982b..889aaeacb5 100644 --- a/guix/docker.scm +++ b/guix/docker.scm @@ -1,6 +1,6 @@ ;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net> -;;; Copyright © 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2017, 2018, 2019, 2021 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2018 Chris Marusich <cmmarusich@gmail.com> ;;; ;;; This file is part of GNU Guix. @@ -113,7 +113,14 @@ Return a version of TAG that follows these rules." (define %tar-determinism-options ;; GNU tar options to produce archives deterministically. '("--sort=name" "--mtime=@1" - "--owner=root:0" "--group=root:0")) + "--owner=root:0" "--group=root:0" + + ;; When 'build-docker-image' is passed store items, the 'nlink' of the + ;; files therein leads tar to store hard links instead of actual copies. + ;; However, the 'nlink' count depends on deduplication in the store; it's + ;; an "implicit input" to the build process. '--hard-dereference' + ;; eliminates it. + "--hard-dereference")) (define directive-file ;; Return the file or directory created by a 'evaluate-populate-directive' |