#!/usr/bin/env python

import sys, os
import re
import os.path

from optparse import OptionParser, OptionValueError

from federation.authorizer import abac_authorizer
from federation.util import file_expanding_opts

class access_opts(file_expanding_opts):
    '''
    Parse the options for this program.  Most are straightforward, but the
    mapper uses a callback to convert from a string to a local mapper function.
    '''

    def __init__(self):
	file_expanding_opts.__init__(self, usage='%prog [opts] file [...]')
	self.add_option('--dir', dest='dir', default=None,
		type='str', action='callback', callback=self.expand_file,
		help='Authorizer to update')
	self.add_option('--debug', action='store_true', dest='debug', 
		default=False, help='Just print actions')
	self.set_defaults(mapper=None)

# Main

opts, args = access_opts().parse_args()

# Validate arguments
if len(args) < 1:
    sys.exit('No filenames given to import')
if opts.dir is None:
    sys.exit('Need an authorizer to update --dir')
if not os.path.isabs(opts.dir):
    sys.exit('Authorizer path must be absolute')

auth = abac_authorizer(load=opts.dir)
if not auth.import_credentials(file_list=args):
    sys.exit("Could not import all creds")

if not opts.debug: auth.save()
else: print "All credentials can be imported.  Not saving because --debug"
sys.exit(0)