#!/usr/bin/env python3

# Usage: git setmail myemail@example.com:"github.com:myprefix" myothermail@example.com:".*"
#
# Configuration format: One combination per line `<email>:<match regex>`

import sys, re, subprocess, os.path

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

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

  combinations = sys.argv[1:]
  if len(combinations) == 0:
    if os.path.isfile(CONFIG):
      combinations = open(CONFIG).read().split('\n')
    else:
      print('Neither CLI arguments nor config ({}) found.'.format(CONFIG))
      return 1

  for combi in combinations:
    email, match = combi.split(':', 1)
    if re.search(match, repo):
      if email == subprocess.check_output(['git', 'config', 'user.email'], universal_newlines=True).strip():
        print('Email correctly set to "{}", not modifying.'.format(email))
      else:
        print('Found repo "{}", setting email to "{}"...'.format(repo, email))
        subprocess.check_call(['git', 'config', 'user.email', email])
      break

  return 0

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