mediagoblin/gmg_commands/migrate.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011 Free Software Foundation, Inc
   3 #
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU Affero General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU Affero General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 import sys
  18
  19 from mediagoblin.db import util as db_util
  20 from mediagoblin.db.open import setup_connection_and_db_from_config
  21 from mediagoblin.init.config import read_mediagoblin_config
  22
  23 # This MUST be imported so as to set up the appropriate migrations!
  24 from mediagoblin.db import migrations
  25
  26
  27 def migrate_parser_setup(subparser):
  28     subparser.add_argument(
  29         '-cf', '--conf_file', default='mediagoblin.ini',
  30         help="Config file used to set up environment")
  31
  32
  33 def _print_started_migration(migration_number, migration_func):
  34     sys.stdout.write(
  35         "Running migration %s, '%s'... " % (
  36             migration_number, migration_func.func_name))
  37     sys.stdout.flush()
  38
  39
  40 def _print_finished_migration(migration_number, migration_func):
  41     sys.stdout.write("done.\n")
  42     sys.stdout.flush()
  43
  44
  45 def migrate(args):
  46     config, validation_result = read_mediagoblin_config(args.conf_file)
  47     connection, db = setup_connection_and_db_from_config(
  48         config['mediagoblin'], use_pymongo=True)
  49     migration_manager = db_util.MigrationManager(db)
  50
  51     # Clear old indexes
  52     print "== Clearing old indexes... =="
  53     removed_indexes = db_util.remove_deprecated_indexes(db)
  54
  55     for collection, index_name in removed_indexes:
  56         print "Removed index '%s' in collection '%s'" % (
  57             index_name, collection)
  58
  59     # Migrate
  60     print "\n== Applying migrations... =="
  61     migration_manager.migrate_new(
  62         pre_callback=_print_started_migration,
  63         post_callback=_print_finished_migration)
  64
  65     # Add new indexes
  66     print "\n== Adding new indexes... =="
  67     new_indexes = db_util.add_new_indexes(db)
  68
  69     for collection, index_name in new_indexes:
  70         print "Added index '%s' to collection '%s'" % (
  71             index_name, collection)