Fix detectition of kernel git repository in setlocalversion script [take #2]

setlocalversion script was testing the presence of .git directory in
order to find out if git is used as SCM to track the current kernel
project. However in some cases, .git is not a directory but can be a
file: when the kernel is a git submodule part of a git super project for
example.

This patch just fixes this by using 'git rev-parse --show-cdup' to check
that the current directory is the kernel git topdir. This has the
advantage to not test and rely on git internal infrastructure directly.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index d105a44b68f664a55559e38217dcf27ccf025b70..63d91e22ed7ccd18a0cd77852af647112ed216bb 100755 (executable)
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -43,7 +43,8 @@ scm_version()
        fi
 
        # Check for git and a git repo.
-       if test -d .git && head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
+       if test -z "$(git rev-parse --show-cdup 2>/dev/null)" &&
+          head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
 
                # If we are at a tagged commit (like "v2.6.30-rc6"), we ignore
                # it, because this version is defined in the top level Makefile.