tcwg-update-tested.sh: Make "git review" command work again

tcwg-abe-tested jobs have been failing with:

  + git review -s
  Creating a git remote called 'gerrit' that maps to:
  	ssh://tcwg-buildslave@review.linaro.org:29418/ci/dockerfiles
  Traceback (most recent call last):
    File "/usr/local/bin/git-review", line 8, in <module>
      sys.exit(main())
    File "/usr/local/lib/python3.8/dist-packages/git_review/cmd.py", line 1844, in main
      _main()
    File "/usr/local/lib/python3.8/dist-packages/git_review/cmd.py", line 1761, in _main
      set_hooks_commit_msg(remote, hook_file)
    File "/usr/local/lib/python3.8/dist-packages/git_review/cmd.py", line 382, in set_hooks_commit_msg
      os.mkdir(hooks_dir)
  FileExistsError: [Errno 17] File exists: '/dev/null'

This happens because repos cloned by Jenkins have the core.hooksPath set to
/dev/null causing the git review to fail¹, therefore we need to change the
configuration value back to its default value.

¹ https://storyboard.openstack.org/#!/story/2010342

Change-Id: I31f64816568e923aa893fcd9d703ae14319614c5

1 files changed, 6 insertions, 0 deletions

diff --git a/tcwg-update-tested.sh b/tcwg-update-tested.sh
index 286eaebc..332ed27c 100755
--- a/tcwg-update-tested.sh
+++ b/tcwg-update-tested.sh
@@ -28,6 +28,12 @@ git -C jenkins-scripts push gerrit $GIT_COMMIT_1:refs/heads/tested
 
 pushd dockerfiles
 GIT_COMMIT_2=$(git rev-parse $GIT_COMMIT_2)
+
+# Repos cloned by Jenkins have the core.hooksPath set to /dev/null, causing the git review
+# command to fail (see https://storyboard.openstack.org/#!/story/2010342) so change it
+# back to its default value.
+git config --unset core.hooksPath
+
 git review -s
 git checkout -B tcwg-tested origin/tcwg-tested
 if [ x"$(git diff HEAD $GIT_COMMIT_2 | wc -l)" != x"0" ]; then