Prefix commit message

prefix_issue.py

#!/usr/bin/env python
# Original code https://andy-carter.com/blog/automating-git-commit-messages-with-git-hooks
# Create hooks directory mkdir -p ~/.git/hooks
# Config global hook path  git config --global core.hooksPath ~/.git/hooks/
# save as prepare-commit-msg
__author__ = "Alex Arce"
__email__ = "alexander.arce@pm.me"
__license__ = "GPL"
__version__ = "1.0"
__credits__ = "Frank Hofmann "
__status__ = "Production"
import re
import sys
from subprocess import check_output

# Calling hook
# ex. ['/home/user/.git/hooks/prepare-commit-msg', '.git/COMMIT_EDITMSG', 'message']
# path to file with commit description, ex. .git/COMMIT_EDITMSG

# Uncomment next lines for testing
# sys.argv = ['/home/alex/.git/hooks/prepare-commit-msg',
#             '.git/COMMIT_EDITMSG', 'message']

commit_msg_filepath = sys.argv[1]
# Get branch, ex. feature/issue_100
branch = check_output(['git', 'symbolic-ref', '--short',
                       'HEAD']).strip().decode('utf-8')
regex = '(?P<issue_name>feature|hotfix|bugfix|support)\/(?P<issue_branch>\w+(_|-)(?P<issue_number>\d+))'
match = re.match(regex, branch)
if match:
    issue_number = match.group('issue_number')
    issue_branch = match.group('issue_branch')
    with open(commit_msg_filepath, 'r+') as fh:
        commit_msg = fh.read()
        fh.seek(0, 0)
        output = F"[{issue_branch}] {commit_msg} refs #{issue_number}"
        # print(output)
        fh.write(output)
elif branch != 'master' and branch != 'develop':
    print('Incorrect branch name, are you run `git flow init`?')
    sys.exit(1)