mediagoblin/gmg_commands/migrate.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011, 2012 MediaGoblin contributors.  See AUTHORS.
   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.mongo import util as db_util
  20 from mediagoblin.db.open import setup_connection_and_db_from_config
  21 from mediagoblin.init import setup_global_and_app_config
  22
  23 # This MUST be imported so as to set up the appropriate migrations!
  24 from mediagoblin.db.mongo import migrations
  25
  26
  27 def migrate_parser_setup(subparser):
  28     pass
  29
  30
  31 def _print_started_migration(migration_number, migration_func):
  32     sys.stdout.write(
  33         "Running migration %s, '%s'... " % (
  34             migration_number, migration_func.func_name))
  35     sys.stdout.flush()
  36
  37
  38 def _print_finished_migration(migration_number, migration_func):
  39     sys.stdout.write("done.\n")
  40     sys.stdout.flush()
  41
  42
  43 def migrate(args):
  44     global_config, app_config = setup_global_and_app_config(args.conf_file)
  45     connection, db = setup_connection_and_db_from_config(
  46         app_config, use_pymongo=True)
  47     migration_manager = db_util.MigrationManager(db)
  48
  49     # Clear old indexes
  50     print "== Clearing old indexes... =="
  51     removed_indexes = db_util.remove_deprecated_indexes(db)
  52
  53     for collection, index_name in removed_indexes:
  54         print "Removed index '%s' in collection '%s'" % (
  55             index_name, collection)
  56
  57     # Migrate
  58     print "\n== Applying migrations... =="
  59     migration_manager.migrate_new(
  60         pre_callback=_print_started_migration,
  61         post_callback=_print_finished_migration)
  62
  63     # Add new indexes
  64     print "\n== Adding new indexes... =="
  65     new_indexes = db_util.add_new_indexes(db)
  66
  67     for collection, index_name in new_indexes:
  68         print "Added index '%s' to collection '%s'" % (
  69             index_name, collection)