nova/doc/ext/versioned_notifications.py
Balazs Gibizer 05adc8d006 Generate doc for versioned notifications
This commit adds a new sphinx extension that inspects the nova code
and adds information about the existing versioned notifications to
the nofitications devref. This way the devref is automatically kept
up to date with relevant information.

Partially-Implements: bp versioned-notification-api
Change-Id: If65d5d81e26cb2b4a9f57a8c7d37d3de310ebe00
2016-01-28 15:33:06 +01:00

113 lines
3.4 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.
"""
This provides a sphinx extension able to list the implemented versioned
notifications into the developer documentation.
It is used via a single directive in the .rst file
.. versioned_notifications::
"""
from sphinx.util.compat import Directive
from docutils import nodes
from nova.objects import base
from nova.objects import notification
def full_name(cls):
return cls.__module__ + '.' + cls.__name__
class VersionedNotificationDirective(Directive):
LINK_PREFIX = 'https://git.openstack.org/cgit/openstack/nova/plain/'
SAMPLE_ROOT = 'doc/notification_samples/'
def run(self):
notifications = self._collect_notifications()
return self._build_markup(notifications)
def _collect_notifications(self):
notifications = []
ovos = base.NovaObjectRegistry.obj_classes()
for name, cls in ovos.items():
cls = cls[0]
if (issubclass(cls, notification.NotificationBase) and
cls != notification.NotificationBase):
payload_name = cls.fields['payload'].objname
payload_cls = ovos[payload_name][0]
notifications.append((full_name(cls), full_name(payload_cls),
cls.sample))
return notifications
def _build_markup(self, notifications):
content = []
cols = ['Notification class', 'Payload class', 'Sample file link']
table = nodes.table()
content.append(table)
group = nodes.tgroup(cols=len(cols))
table.append(group)
head = nodes.thead()
group.append(head)
for i in range(len(cols)):
group.append(nodes.colspec(colwidth=1))
body = nodes.tbody()
group.append(body)
# fill the table header
row = nodes.row()
body.append(row)
for col_name in cols:
col = nodes.entry()
row.append(col)
text = nodes.strong(text=col_name)
col.append(text)
# fill the table content, one notification per row
for name, payload, sample in notifications:
row = nodes.row()
body.append(row)
col = nodes.entry()
row.append(col)
text = nodes.literal(text=name)
col.append(text)
col = nodes.entry()
row.append(col)
text = nodes.literal(text=payload)
col.append(text)
col = nodes.entry()
row.append(col)
ref = nodes.reference(refuri=self.LINK_PREFIX +
self.SAMPLE_ROOT + sample)
txt = nodes.inline()
col.append(txt)
txt.append(ref)
ref.append(nodes.literal(text=sample))
return content
def setup(app):
app.add_directive('versioned_notifications',
VersionedNotificationDirective)