horizon/openstack_dashboard/utils/settings.py
Radomir Dopieralski ce3fea4921 Allow adding to INSTALLED_APPS from local_settings.py
Defines a new option, ADD_INSTALLED_APPS, which gets prepended
to the beginning of INSTALLED_APPS.

Change-Id: I956835c3e18edee9e223a607005b47a5c5977687
Closes-bug: #1343342
2015-02-17 08:46:56 +01:00

142 lines
6.0 KiB
Python

# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import collections
import logging
import os
import pkgutil
from django.utils import importlib
import six
def import_submodules(module):
"""Import all submodules and make them available in a dict."""
submodules = {}
for loader, name, ispkg in pkgutil.iter_modules(module.__path__,
module.__name__ + '.'):
try:
submodule = importlib.import_module(name)
except ImportError as e:
# FIXME: Make the errors non-fatal (do we want that?).
logging.warning("Error importing %s" % name)
logging.exception(e)
else:
parent, child = name.rsplit('.', 1)
submodules[child] = submodule
return submodules
def import_dashboard_config(modules):
"""Imports configuration from all the modules and merges it."""
config = collections.defaultdict(dict)
for module in modules:
for key, submodule in six.iteritems(import_submodules(module)):
if hasattr(submodule, 'DASHBOARD'):
dashboard = submodule.DASHBOARD
config[dashboard].update(submodule.__dict__)
elif (hasattr(submodule, 'PANEL')
or hasattr(submodule, 'PANEL_GROUP')):
config[submodule.__name__] = submodule.__dict__
else:
logging.warning("Skipping %s because it doesn't have DASHBOARD"
", PANEL or PANEL_GROUP defined.",
submodule.__name__)
return sorted(six.iteritems(config),
key=lambda c: c[1]['__name__'].rsplit('.', 1))
def update_dashboards(modules, horizon_config, installed_apps):
"""Imports dashboard and panel configuration from modules and applies it.
The submodules from specified modules are imported, and the configuration
for the specific dashboards is merged, with the later modules overriding
settings from the former. Then the configuration is applied to
horizon_config and installed_apps, in alphabetical order of files from
which the configurations were imported.
For example, given this setup:
| foo/__init__.py
| foo/_10_baz.py
| foo/_20_qux.py
| bar/__init__.py
| bar/_30_baz_.py
and being called with ``modules=[foo, bar]``, we will first have the
configuration from ``_10_baz`` and ``_30_baz`` merged, then the
configurations will be applied in order ``qux``, ``baz`` (``baz`` is
second, because the most recent file which contributed to it, ``_30_baz``,
comes after ``_20_qux``).
Panel specific configurations are stored in horizon_config. Dashboards
from both plugin-based and openstack_dashboard must be registered before
the panel configuration can be applied. Making changes to the panel is
deferred until the horizon autodiscover is completed, configurations are
applied in alphabetical order of files where it was imported.
"""
config_dashboards = horizon_config.get('dashboards', [])
if config_dashboards or horizon_config.get('default_dashboard'):
logging.warning(
'"dashboards" and "default_dashboard" in (local_)settings is '
'DEPRECATED now and may be unsupported in some future release. '
'The preferred way to specify the order of dashboards and the '
'default dashboard is the pluggable dashboard mechanism (in %s).',
', '.join([os.path.abspath(module.__path__[0])
for module in modules])
)
enabled_dashboards = []
disabled_dashboards = []
exceptions = {}
apps = []
angular_modules = []
js_files = []
js_spec_files = []
panel_customization = []
update_horizon_config = {}
for key, config in import_dashboard_config(modules):
if config.get('DISABLED', False):
if config.get('DASHBOARD'):
disabled_dashboards.append(config.get('DASHBOARD'))
continue
apps.extend(config.get('ADD_INSTALLED_APPS', []))
exceptions.update(config.get('ADD_EXCEPTIONS', {}))
angular_modules.extend(config.get('ADD_ANGULAR_MODULES', []))
js_files.extend(config.get('ADD_JS_FILES', []))
js_spec_files.extend(config.get('ADD_JS_SPEC_FILES', []))
update_horizon_config.update(
config.get('UPDATE_HORIZON_CONFIG', {}))
if config.get('DASHBOARD'):
dashboard = key
enabled_dashboards.append(dashboard)
if config.get('DEFAULT', False):
horizon_config['default_dashboard'] = dashboard
elif config.get('PANEL') or config.get('PANEL_GROUP'):
config.pop("__builtins__", None)
panel_customization.append(config)
# Preserve the dashboard order specified in settings
dashboards = ([d for d in config_dashboards
if d not in disabled_dashboards] +
[d for d in enabled_dashboards
if d not in config_dashboards])
horizon_config['panel_customization'] = panel_customization
horizon_config['dashboards'] = tuple(dashboards)
horizon_config.setdefault('exceptions', {}).update(exceptions)
horizon_config.update(update_horizon_config)
horizon_config.setdefault('angular_modules', []).extend(angular_modules)
horizon_config.setdefault('js_files', []).extend(js_files)
horizon_config.setdefault('js_spec_files', []).extend(js_spec_files)
installed_apps[0:0] = apps