From 9bf6c6e24fb1dac49fbf2df50eb166a6c45688ce Mon Sep 17 00:00:00 2001
From: Willy Tarreau <w@1wt.eu>
Date: Sat, 23 Dec 2006 11:12:04 +0100
Subject: [PATCH] [BUILD] makefile now detects and uses git to set the version

If git is found during the build process, then it will be used
to set the version, the commit number and the commit date. This
way, it will not be needed anymore to update the code to change
the version. The version is the last tag, and the commit number
is the number of commits since the last tag.
---
 Makefile | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/Makefile b/Makefile
index b10fa21ab..0215a6dbc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,7 @@
 # This makefile supports different OS and CPU setups.
 # You should use it this way :
-#   make TARGET=os CPU=cpu
+#   make TARGET=os CPU=cpu REGEX=lib
 
-# Version of last tag
-VERSION := 1.3.3
-# number of changes since last tag
-SUBVERS := -34
-VERDATE := 2006/12/22
 
 # Select target OS. TARGET must match a system for which COPTS and LIBS are
 # correctly defined below.
@@ -99,6 +94,21 @@ ADDLIB =
 # - use -DCONFIG_HAP_CTTPROXY to enable full transparent proxy support
 DEFINE = -DTPROXY
 
+# Now let's determine the version, sub-version and release date.
+# If we're in the GIT tree, we can use the last commit's version and date.
+VERSION := $(shell [ -d .git/. ] && ref=$$(git-describe --tags 2>/dev/null) && ref=$${ref%-g*} && echo "$${ref\#v}" )
+
+ifneq ($(VERSION),)
+# OK git is there and works.
+SUBVERS := $(shell comms=$$(git-log --no-merges v$(VERSION).. 2>/dev/null |grep -c ^commit ); [ $$comms -gt 0 ] && echo "-$$comms" )
+VERDATE := $(shell date +%Y/%m/%d -d "$$(git-log HEAD^.. 2>/dev/null | grep ^Date: | cut -f2- -d: | cut -f1 -d+)" )
+else
+# Otherwise, use the hard-coded version of last tag, number of changes
+# since last tag, and release date.
+VERSION := 1.3.3
+SUBVERS := -36
+VERDATE := 2006/12/23
+endif
 
 #### build options
 
@@ -184,7 +194,8 @@ objsize: haproxy
 clean:
 	rm -f *.[oas] src/*.[oas] core haproxy test
 	for dir in . src include/* doc; do rm -f $$dir/*~ $$dir/*.rej;done
-	rm -f haproxy-$(VERSION).tar.gz haproxy-$(VERSION) nohup.out gmon.out
+	rm -f haproxy-$(VERSION).tar.gz haproxy-$(VERSION)$(SUBVERS).tar.gz
+	rm -f haproxy-$(VERSION) nohup.out gmon.out
 
 tar:	clean
 	ln -s . haproxy-$(VERSION)
@@ -195,6 +206,4 @@ tar:	clean
 	rm -f haproxy-$(VERSION)
 
 git-tar: clean
-	ref=$$(git-describe --tags); ref=$${ref%-g*}; ver=$${ref#v};\
-	comms=$$(git-log $$ref..|grep -c ^commit); \
-	git-tar-tree HEAD haproxy-$(VERSION) | gzip -9 > haproxy-$$ver-$$comms.tar.gz
+	git-tar-tree HEAD haproxy-$(VERSION) | gzip -9 > haproxy-$(VERSION)$(SUBVERS).tar.gz