Support reproducible builds

Recent development versions of makepkg support reproducible builds
through the environment variable SOURCE_DATE_EPOCH. Pass this variable
through makechrootpkg to makepkg when available.

Also initialize SOURCE_DATE_EPOCH whenever running archbuild to enforce
reproducible builds for repository packages.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/archroot.sh b/lib/archroot.sh
index 98fd2cf..f279603 100644
--- a/lib/archroot.sh
+++ b/lib/archroot.sh
@@ -6,13 +6,15 @@
 CHROOT_VERSION='v4'
 
 ##
-#  usage : check_root
+#  usage : check_root $keepenv
 ##
 orig_argv=("$0" "$@")
 check_root() {
+	local keepenv=$1
+
 	(( EUID == 0 )) && return
 	if type -P sudo >/dev/null; then
-		exec sudo -- "${orig_argv[@]}"
+		exec sudo --preserve-env=$keepenv -- "${orig_argv[@]}"
 	else
 		exec su root -c "$(printf ' %q' "${orig_argv[@]}")"
 	fi