From 0c8d33951400f7d7175e1dad51e970fb70849f2b Mon Sep 17 00:00:00 2001
From: Patrick Steinhardt <ps@pks.im>
Date: Fri, 6 Dec 2024 14:24:39 +0100
Subject: Makefile: propagate Git version via generated header

We set up a couple of preprocessor macros when compiling Git that
propagate the version that Git was built from to `git version` et al.
The way this is set up makes it harder than necessary to reuse the
infrastructure across the different build systems.

Refactor this such that we generate a "version-def.h" header via
`GIT-VERSION-GEN` instead.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 GIT-VERSION-GEN | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'GIT-VERSION-GEN')

diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index 7afc7aad14..c18f24e515 100755
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -52,6 +52,11 @@ else
 fi
 
 GIT_VERSION=$(expr "$VN" : v*'\(.*\)')
+GIT_BUILT_FROM_COMMIT=$(git -C "$SOURCE_DIR" rev-parse -q --verify HEAD 2>/dev/null)
+if test -z "$GIT_USER_AGENT"
+then
+	GIT_USER_AGENT="git/$GIT_VERSION"
+fi
 
 read GIT_MAJOR_VERSION GIT_MINOR_VERSION GIT_MICRO_VERSION trailing <<EOF
 $(echo "$GIT_VERSION" 0 0 0 | tr '.a-zA-Z-' ' ')
@@ -61,6 +66,8 @@ sed -e "s|@GIT_VERSION@|$GIT_VERSION|" \
 	-e "s|@GIT_MAJOR_VERSION@|$GIT_MAJOR_VERSION|" \
 	-e "s|@GIT_MINOR_VERSION@|$GIT_MINOR_VERSION|" \
 	-e "s|@GIT_MICRO_VERSION@|$GIT_MICRO_VERSION|" \
+	-e "s|@GIT_BUILT_FROM_COMMIT@|$GIT_BUILT_FROM_COMMIT|" \
+	-e "s|@GIT_USER_AGENT@|$GIT_USER_AGENT|" \
 	"$INPUT" >"$OUTPUT"+
 
 if ! test -f "$OUTPUT" || ! cmp "$OUTPUT"+ "$OUTPUT" >/dev/null
-- 
cgit v1.2.3