slack_heroku_notifier.py

import httplib, json
import getopt, sys, os
import subprocess


def get_data_from_git(format_string, commit):
  return subprocess.check_output(['git', 'log', '-1', '--format=format:%s' % format_string, commit])

def get_author(commit):
  return get_data_from_git('%an', commit)

def post_message(connection, url, app):
  headers = {'Content-Type': 'application/json'}
 
  commit = os.environ['COMMIT']
  version = os.environ['HEROKU_V']
  color = 'good'
  text = '%s deployed version %s of <https://%s.herokuapp.com| #%s>' % ( get_author(commit), version, app, app)

  message = {
    'username': 'Shippable',
    'fallback': text,
    'pretext': text,
    'color': color
    ]
  }

  connection.request('POST', url, json.dumps(message), headers)
  response = connection.getresponse()
  print response.read().decode()

def main():
  try:
    opts, args = getopt.getopt(sys.argv[1:], ':sf', ['app=', 'swh='])
  except getopt.GetoptError as err:
    print str(err)
    sys.exit(2)
 
  app = None
  url = None 
  message = None 
  for o, arg in opts:
    if o == '--app':
      app = arg
    elif o == '--swh':
      url = arg  

  connection = httplib.HTTPSConnection('hooks.slack.com')
  post_message(connection, url, app)

if __name__ == '__main__':
  main()