#!/usr/bin/env python
# CCS Computer Science
#
# Douglas Thrift
#
# $Id$

import admin
import ldap
import os.path

try:
	from _users import users
except ImportError:
	users = set()

def user(user):
	if user in users:
		return True

	connection = admin.ldap_connection(False)

	try:
		return bool(connection.search_s(admin.PEOPLE, ldap.SCOPE_ONELEVEL, '(uid=%s)' % user, ('uid',), 1))
	finally:
		connection.unbind_s()

if __name__ == '__main__':
	parser = admin.parser(usage = '%prog [options] [FILE...]')

	parser.add_option('-l', '--list', action = 'store_true', default = False, help = 'list the system users from all systems')
	parser.add_option('-t', '--touch', help = 'touch the file TOUCH if successful')

	options, args = parser.parse_args()

	if options.list:
		for user in sorted(users):
			print user

		parser.exit()

	if not args:
		parser.error('no files specified')

	_users = frozenset(users)

	format = '%%%us: %%s' % ((len(max(args, key = len)) + 1) / 2 * 2)

	for user_file in args:
		with open(user_file, 'rb') as user_file:
			for line in user_file:
				if line.startswith('#'):
					continue

				_user = line.split(':', 1)[0]

				if not user(_user):
					print format % (user_file.name, _user)

					users.add(_user)

	if users != _users:
		with open(os.path.join(os.path.dirname(__file__), '_users.py'), 'wb') as user_file:
			user_file.write('users = set((\n')

			for user in sorted(users):
				user_file.write('\t%s,\n' % repr(user))

			user_file.write('))\n\n# vim: noexpandtab tabstop=4\n')

	if options.touch:
		open(options.touch, 'wb')

# vim: noexpandtab tabstop=4