update_submodules

#!/usr/bin/env python

import argparse, fnmatch, os, subprocess, sys

def log_err(s):
  sys.stdout.write('\033[1;31m' + s + '\033[0m\n')
  sys.stdout.flush()

def get_subrepos():
  subrepos = subprocess.check_output('git submodule', shell=True).split('\n')
  # Last line is empty
  subrepos.pop()
  # Extract subrepos from git submodule output
  return map(lambda s: s[1:].split()[1], subrepos)

def main():
  parser = argparse.ArgumentParser(description='Updates submodules applying additional patches')
  parser.add_argument('-v', '--verbose', action='store_true', help='Print stderr and stdout during')
  args = parser.parse_args()
  brackets = 'libs/brackets-server/brackets-src'
  codemirror_url = 'https://github.com/codemirror/CodeMirror.git'
  codemirror_subrepo = 'src/thirdparty/CodeMirror'

  subrepos = get_subrepos()
  # Brackets needs to update CodeMirror submodule, so treat it differently
  subrepos.remove(brackets)

  if args.verbose:
    out = None
    err = None
  else:
    out = open(os.devnull, 'w')
    err = subprocess.STDOUT

  def call_git_cmd(cmd):
    git_cmd = 'git ' + cmd
    if (subprocess.call(git_cmd, shell=True, stdout=out, stderr=err)) != 0:
      log_err('Command failed: ' + git_cmd)
      return False
    return True

  for s in subrepos:
    if not call_git_cmd('submodule update --init --recursive -- ' + s):
      return 1

  if not call_git_cmd('submodule update --init -- ' + brackets):
    return 1

  curr_dir = os.getcwd()
  os.chdir(brackets)
  brackets_subrepos = get_subrepos()
  # CodeMirror needs to be updated from different url, as current one is deprecated. so treat it differently
  brackets_subrepos.remove(codemirror_subrepo)
  for s in brackets_subrepos:
    if not call_git_cmd('submodule update --init --recursive -- ' + s):
      os.chdir(curr_dir)
      return 1

  if (
      not call_git_cmd('config submodule.' + codemirror_subrepo + '.url ' + codemirror_url) or
      not call_git_cmd('submodule update --recursive --remote -- ' + codemirror_subrepo)
     ):
    os.chdir(curr_dir)
    return 1
  cached_output = subprocess.check_output('git submodule status --cached -- ' + codemirror_subrepo, shell=True).split('\n')
  # Get cached commit id
  cached_commit_id = cached_output[0][1:].split()[0]
  os.chdir(codemirror_subrepo)
  if not call_git_cmd('checkout ' + cached_commit_id):
    os.chdir(curr_dir)
    return 1
  os.chdir(curr_dir)
  return 0

if __name__ == '__main__':
  sys.exit(main())