Filtering of hooks for commit or push stages

pre_commit/main.py

@@ -87,7 +87,6 @@ def main(argv=None):
     run_parser.add_argument(
         '--verbose', '-v', action='store_true', default=False,
     )
-
     run_parser.add_argument(
         '--origin', '-o',
         help='The origin branch\'s commit_id when using `git push`',
@@ -101,6 +100,10 @@ def main(argv=None):
         help='Allow an unstaged config to be present.  Note that this will'
         'be stashed before parsing unless --no-stash is specified'
     )
+    run_parser.add_argument(
+        '--hook-stage', choices=('commit', 'push'), default='commit',
+        help='The stage during which the hook is fired e.g. commit or push'
+    )
     run_mutex_group = run_parser.add_mutually_exclusive_group(required=False)
     run_mutex_group.add_argument(
         '--all-files', '-a', action='store_true', default=False,