abuild: get the git commit date only when needed

getting the commit date can be timeconsuming so only do it once we need
it. We also re-use the ABUILD_LAST_COMMIT to speed up the operation.

1 files changed, 12 insertions, 8 deletions

diff --git a/abuild.in b/abuild.in
index 2ba0f4b..d4f313c 100644
--- a/abuild.in
+++ b/abuild.in
@@ -1608,6 +1608,17 @@ build_abuildrepo() {
 		logcmd "building $repo/$pkgname-$pkgver-r$pkgrel"
 		local _starttime=$(date --utc +%s)
 		msg "Building $repo/$pkgname $pkgver-r$pkgrel (using $program $program_version) started $(date -R)"
+
+		# set time stamp for reproducible builds
+		export ABUILD_LAST_COMMIT="$(git_last_commit)$(git_dirty)"
+		if [ -z "$SOURCE_DATE_EPOCH" ] && [ "${ABUILD_LAST_COMMIT%-dirty}" = "$ABUILD_LAST_COMMIT" ]; then
+			SOURCE_DATE_EPOCH=$(git_last_commit_epoch $ABUILD_LAST_COMMIT)
+		fi
+		if [ -z "$SOURCE_DATE_EPOCH" ]; then
+			SOURCE_DATE_EPOCH=$(date -u "+%s")
+		fi
+		export SOURCE_DATE_EPOCH
+
 		for part in sanitycheck builddeps clean fetch unpack prepare mkusers build \
 				$_check rootpkg; do
 			runpart $part
@@ -1891,6 +1902,7 @@ rootpkg() {
 	cd "$startdir"
 	rm -rf "$pkgdir"
 	[ -n "$FAKEROOT" ] && msg "Entering fakeroot..."
+
 	do_fakeroot "$abuild_path" $forceroot $color_opt $keep_build \
 		package \
 		prepare_subpackages \
@@ -2556,14 +2568,6 @@ BUILD_ROOT=
 
 export CC CXX
 
-if [ -z "$SOURCE_DATE_EPOCH" ]; then
-	SOURCE_DATE_EPOCH=$(git_last_commit_epoch)
-fi
-if [ -z "$SOURCE_DATE_EPOCH" ]; then
-	SOURCE_DATE_EPOCH=$(date -u "+%s")
-fi
-export SOURCE_DATE_EPOCH
-
 cd "$startdir" || die
 . "$APKBUILD"