[PATCH] GIT-VERSION-GEN: support non-standard $GIT_DIR path

[Dennis Kaarsemaker <dennis@kaarsemaker.net>]

make and make test both work when $GIT_DIR isn't .git, but make dist
included a bogus GIT-VERSION-FILE.

Signed-off-by: Dennis Kaarsemaker <dennis@kaarsemaker.net>
---
 I'm doing daily builds of git, using many workers and a shared git.git,
 with per-worker checkouts, it would be really useful if GIT-VERSION-GEN
 actually supports this and doesn't generate a fairly bogus
 GIT-VERSION-FILE.

 GIT-VERSION-GEN | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index 390782f..7dcca28 100755
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -11,7 +11,7 @@ LF='
 if test -f version
 then
 	VN=$(cat version) || VN="$DEF_VER"
-elif test -d .git -o -f .git &&
+elif test -d .git -o -f .git -o test -d $GIT_DIR &&
 	VN=$(git describe --match "v[0-9]*" --abbrev=7 HEAD 2>/dev/null) &&
 	case "$VN" in
 	*$LF*) (exit 1) ;;
-- 
1.8.2.4.g940421e