Now we have something useful: mediagoblin.celery_setup.from_celery

auto-configures a celery config module from your paste config

mediagoblin/celery_setup/from_celery.py

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+# GNU MediaGoblin -- federated, autonomous media hosting
+# Copyright (C) 2011 Free Software Foundation, Inc
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+
+import mongokit
+from paste.deploy.loadwsgi import NicerConfigParser
+
+from mediagoblin import storage
+from mediagoblin.celery_setup import setup_celery_from_config
+from mediagoblin.globals import setup_globals
+
+
+OUR_MODULENAME = 'mediagoblin.celery_setup.from_celery'
+
+
+def setup_self(setup_globals_func=setup_globals):
+    """
+    Transform this module into a celery config module by reading the
+    mediagoblin config file.  Set the environment variable
+    MEDIAGOBLIN_CONFIG to specify where this config file is at and
+    what section it uses.
+
+    By default it defaults to 'mediagoblin.ini:app:mediagoblin'.
+
+    The first colon ":" is a delimiter between the filename and the
+    config section, so in this case the filename is 'mediagoblin.ini'
+    and the section where mediagoblin is defined is 'app:mediagoblin'.
+
+    Args:
+    - 'setup_globals_func': this is for testing purposes only.  Don't
+      set this!
+    """
+    mgoblin_conf_file, mgoblin_section = os.environ.get(
+        'MEDIAGOBLIN_CONFIG', 'mediagoblin.ini:app:mediagoblin').split(':', 1)
+    if not os.path.exists(mgoblin_conf_file):
+        raise IOError(
+            "MEDIAGOBLIN_CONFIG not set or file does not exist")
+        
+    parser = NicerConfigParser(mgoblin_conf_file)
+    parser.read(mgoblin_conf_file)
+    parser._defaults.setdefault(
+        'here', os.path.dirname(os.path.abspath(mgoblin_conf_file)))
+    parser._defaults.setdefault(
+        '__file__', os.path.abspath(mgoblin_conf_file))
+
+    mgoblin_section = dict(parser.items(mgoblin_section))
+    mgoblin_conf = dict(
+        [(section_name, dict(parser.items(section_name)))
+         for section_name in parser.sections()])
+    setup_celery_from_config(
+        mgoblin_section, mgoblin_conf,
+        settings_module=OUR_MODULENAME,
+        set_environ=False)
+
+    connection = mongokit.Connection(
+        mgoblin_section.get('db_host'), mgoblin_section.get('db_port'))
+    db = connection[mgoblin_section.get('db_name', 'mediagoblin')]
+
+    # Set up the storage systems.
+    public_store = storage.storage_system_from_paste_config(
+        mgoblin_section, 'publicstore')
+    queue_store = storage.storage_system_from_paste_config(
+        mgoblin_section, 'queuestore')
+
+    setup_globals_func(
+        db_connection=connection,
+        database=db,
+        public_store=public_store,
+        queue_store=queue_store)
+
+
+if os.environ['CELERY_CONFIG_MODULE'] == OUR_MODULENAME:
+    setup_self()