A simple GIT commit-msg hook that conforms to the conventional commits style

commit-msg

#!/usr/bin/env python
# Copyright (C) 2019 Adrian Carpenter
# 
# Simple GIT commit-msg hook that conforms to the conventional commits style.
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

import re
import sys

line = open(sys.argv[1]).readline().rstrip("\r\n")

valid = re.match("^(wip|repo|feat|fix|docs|style|refactor|perf|test|chore)(\(.+\))?: [a-z].{1,50}[^\. ]$", line)

if valid:
    sys.exit(0)

print("the commit message was not formatted correctly.")

sys.exit(1)