[PATCH] make-release: fix mtime for a wider range of git versions

[Bernhard Kohl <bernhard.kohl@nsn.com>]

With the latest git versions, e.g. 1.7.2.3, git still prints out
the tag info in addition to the requested format. So let's simply
fetch the first line from the output.

In addition I use the --pretty option instead of --format which
is not recognized in very old git versions, e.g. 1.5.5.6.

Tested with git versions 1.5.5.6 and 1.7.2.3.

Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com>
---
 kvm/scripts/make-release |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kvm/scripts/make-release b/kvm/scripts/make-release
index 56302c3..2d050fc 100755
--- a/kvm/scripts/make-release
+++ b/kvm/scripts/make-release
@@ -51,7 +51,7 @@ cd "$(dirname "$0")"/../..
 mkdir -p "$(dirname "$tarball")"
 git archive --prefix="$name/" --format=tar "$commit" > "$tarball"
 
-mtime=`git show --format=%ct "$commit""^{commit}" --`
+mtime=`git show --pretty=format:%ct "$commit""^{commit}" -- | head -n 1`
 tarargs="--owner=root --group=root"
 
 mkdir -p "$tmpdir/$name"
-- 
1.7.2.3