From 9b88fcef7dd6327cc3aba3927e56fef6f6c4d628 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <junkio@cox.net>
Date: Tue, 27 Dec 2005 14:40:17 -0800
Subject: [PATCH] Makefile: use git-describe to mark the git version.

Note: with this commit, the GIT maintainer workflow must change.
GIT-VERSION-GEN is now the file to munge when the default
version needs to be changed, not Makefile.  The tag needs to be
pushed into the repository to build the official tarball and
binary package beforehand.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 .gitignore      |  1 +
 GIT-VERSION-GEN | 18 ++++++++++++++++++
 Makefile        | 20 +++++++++++++++-----
 3 files changed, 34 insertions(+), 5 deletions(-)
 create mode 100755 GIT-VERSION-GEN

diff --git a/.gitignore b/.gitignore
index 6bd508e4b..47d76f407 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+GIT-VERSION-FILE
 git
 git-add
 git-am
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
new file mode 100755
index 000000000..196402ce6
--- /dev/null
+++ b/GIT-VERSION-GEN
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+GVF=GIT-VERSION-FILE
+
+VN=$(git describe --abbrev=4 HEAD 2>/dev/null) || VN=v1.0.GIT
+VN=$(expr "$VN" : v'\(.*\)')
+if test -r $GVF
+then
+	VC=$(sed -e 's/^GIT_VERSION = //' <$GVF)
+else
+	VC=unset
+fi
+test "$VN" = "$VC" || {
+	echo >&2 "GIT_VERSION = $VN"
+	echo "GIT_VERSION = $VN" >$GVF
+}
+
+
diff --git a/Makefile b/Makefile
index 47e78982e..1b6caf85b 100644
--- a/Makefile
+++ b/Makefile
@@ -55,7 +55,9 @@ all:
 # Define USE_STDEV below if you want git to care about the underlying device
 # change being considered an inode change from the update-cache perspective.
 
-GIT_VERSION = 1.0.GIT
+GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
+	@sh ./GIT-VERSION-GEN
+-include GIT-VERSION-FILE
 
 # CFLAGS and LDFLAGS are for the users to override from the command line.
 
@@ -369,7 +371,7 @@ all: $(ALL_PROGRAMS)
 all:
 	$(MAKE) -C templates
 
-git$X: git.c $(LIB_FILE) Makefile
+git$X: git.c $(LIB_FILE)
 	$(CC) -DGIT_EXEC_PATH='"$(bindir)"' -DGIT_VERSION='"$(GIT_VERSION)"' \
 		$(CFLAGS) $(COMPAT_CFLAGS) -o $@ $(filter %.c,$^) $(LIB_FILE)
 
@@ -398,8 +400,12 @@ $(patsubst %.py,%,$(SCRIPT_PYTHON)) : % : %.py
 git-cherry-pick: git-revert
 	cp $< $@
 
-# format-patch records GIT_VERSION
-git-format-patch: Makefile
+# These can record GIT_VERSION
+git$X git.spec \
+	$(patsubst %.sh,%,$(SCRIPT_SH)) \
+	$(patsubst %.perl,%,$(SCRIPT_PERL)) \
+	$(patsubst %.py,%,$(SCRIPT_PYTHON)) \
+	: GIT-VERSION-FILE
 
 %.o: %.c
 	$(CC) -o $*.o -c $(ALL_CFLAGS) $<
@@ -475,7 +481,7 @@ install-doc:
 
 ### Maintainer's dist rules
 
-git.spec: git.spec.in Makefile
+git.spec: git.spec.in
 	sed -e 's/@@VERSION@@/$(GIT_VERSION)/g' < $< > $@
 
 GIT_TARNAME=git-$(GIT_VERSION)
@@ -510,4 +516,8 @@ clean:
 	$(MAKE) -C Documentation/ clean
 	$(MAKE) -C templates clean
 	$(MAKE) -C t/ clean
+	rm -f GIT-VERSION-FILE
+
+.PHONY: all install clean
+.PHONY: .FORCE-GIT-VERSION-FILE
 
-- 
2.26.2