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git/GIT-VERSION-GEN
Junio C Hamano c96c29093f GIT-VERSION-GEN: adjust for ancient git
When an ancient "git" that does not understand "describe"
command is on the $PATH, "git describe" emitted a Usage message
without exiting non-zero status (which is a mistake we cannot
fix retroactively).  Catch this case to make sure we do not try
using phoney multi-line string as a version number.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-08-08 13:20:18 -07:00

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#!/bin/sh
GVF=GIT-VERSION-FILE
DEF_VER=v1.4.2.GIT
LF='
'
# First try git-describe, then see if there is a version file
# (included in release tarballs), then default
if VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
case "$VN" in
*$LF*) (exit 1) ;;
v[0-9]*) : happy ;;
esac
then
VN=$(echo "$VN" | sed -e 's/-/./g');
elif test -f version
then
VN=$(cat version) || VN="$DEF_VER"
else
VN="$DEF_VER"
fi
VN=$(expr "$VN" : v*'\(.*\)')
dirty=$(sh -c 'git diff-index --name-only HEAD' 2>/dev/null) || dirty=
case "$dirty" in
'')
;;
*)
VN="$VN-dirty" ;;
esac
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
}