Ensures that commit messages start with "VA-XXXX"

commit-msg

#!/usr/bin/env python
# This commit-msg git hook takes a commit message as it first argument.
# It's purpose is to ensure that the message starts with "VA-XXXX"

import sys
import re


pattern = r"^[Vv][Aa]-\d+[\s\.]"

def print_commit_message(commit_message):
    print ">>> START MESSAGE >>>"
    print commit_message
    print "<<< END MESSAGE <<< \n"

def get_choice():
    sys.stdin = open("/dev/tty")  # This allows raw_input in a hook
    choice_str = raw_input("Are you sure you want this message? [y/(n)]: ")
    sys.stdin.close()
    return choice_str

def yes(choice_str):
    return (re.compile("^[Yy]").match(choice_str) != None)

def use_message():
    print "Using the message."
    sys.exit(0)

def ditch_message():
    print "Ditching the message."
    sys.exit(1)

def main():
    commit_message = open(sys.argv[1]).read()
    match = re.compile(pattern).match(commit_message)

    if not match:
        print "The commit message does not start with: VA-XXXX"
        print_commit_message(commit_message)

        choice_str = get_choice()

        if yes(choice_str):
            use_message()
        ditch_message()

main()