message: Updating error handling to properly handle the case where git is not installed
diff: @@ -48,7 +48,7 @@ tests_require = []
  try:
  git_version = subprocess.check_output(['git', 'rev-parse', 'HEAD'],
  cwd=TOP_DIR).decode('ascii').strip()
  -except subprocess.CalledProcessError:
  +except (OSError, subprocess.CalledProcessError):
  git_version = None
  with open(os.path.join(TOP_DIR, 'VERSION_NUMBER')) as version_file:
  