pkg/vcs: Unset various git environment variables when invoking git

If you try to run git-using tests while the GIT_DIR environment variable
(and GIT_WORK_TREE, etc) happens to be set, the tests are going to do fun
and exciting things on a repository that isn't the test repository it tries
to set up.

As it turns out, if you try to run "make test" using git rebase -x, you'll
end up with GIT_DIR set to the syzkaller tree. Hilarity ensues.

Unset GIT_DIR, GIT_WORK_TREE and a few other environment variables when
invoking git - that way it'll default to looking at the working directory
that we have given it, which is what we expect.

Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>

0 files changed, 0 insertions, 0 deletions