#!/usr/bin/env python3

# Usage: git setmail
#
# Configuration format: 
#   [
#     {
#       "match": ".*",
#       "email": "mymail@example.com",
#       "gpg-key": "...",
#     }
#   ]

import sys, re, subprocess, os.path, json

CONFIG=os.path.expanduser('~/.config/git-setmail.json')

def main():
  try:
    repo = [x.split()[1] for x in subprocess.check_output(['git', 'remote', '-v'], universal_newlines=True).split('\n') if re.match('origin.*\(push\)', x)][0]
  except:
    print('Could not find origin, not setting email.')
    return 1

  if os.path.isfile(CONFIG):
    combinations = json.loads(open(CONFIG).read())
  else:
    print('Config ({}) found.'.format(CONFIG))
    return 1

  for combi in combinations:
    if re.search(combi['match'], repo):
      if combi['email'] == subprocess.check_output(['git', 'config', 'user.email'], universal_newlines=True).strip():
        print('Email correctly set to "{}", not modifying.'.format(combi['email']))
      else:
        print('Found repo "{}", setting email to "{}"...'.format(repo, combi['email']))
        subprocess.check_call(['git', 'config', 'user.email', combi['email']])
        if 'gpg-key' in combi and combi['gpg-key'] != '':
          subprocess.check_call(['git', 'config', 'user.signingkey', combi['gpg-key']])
      break

  return 0

if __name__ == "__main__":
  exit(main())