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# 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
# 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 inspect
from docutils import nodes
from docutils.parsers import rst
from docutils.parsers.rst import directives
from docutils.statemachine import ViewList
from sphinx.util import logging
from sphinx.util.nodes import nested_parse_with_titles
from stevedore import extension
LOG = logging.getLogger(__name__)
def _get_docstring(plugin):
return inspect.getdoc(plugin) or ''
def _simple_list(mgr):
for name in sorted(mgr.names()):
ext = mgr[name]
doc = _get_docstring(ext.plugin) or '\n'
summary = doc.splitlines()[0].strip()
yield('* %s -- %s' % (, summary),
def _detailed_list(mgr, over='', under='-', titlecase=False):
for name in sorted(mgr.names()):
ext = mgr[name]
if over:
yield (over * len(, ext.module_name)
if titlecase:
yield (, ext.module_name)
yield (, ext.module_name)
if under:
yield (under * len(, ext.module_name)
yield ('\n', ext.module_name)
doc = _get_docstring(ext.plugin)
if doc:
yield (doc, ext.module_name)
yield (
'.. warning:: No documentation found for {} in {}'.format(, ext.entry_point_target,
yield ('\n', ext.module_name)
class ListPluginsDirective(rst.Directive):
"""Present a simple list of the plugins in a namespace."""
option_spec = {
'class': directives.class_option,
'detailed': directives.flag,
'titlecase': directives.flag,
'overline-style': directives.single_char_or_unicode,
'underline-style': directives.single_char_or_unicode,
has_content = True
def run(self):
namespace = ' '.join(self.content).strip()'documenting plugins from %r' % namespace)
overline_style = self.options.get('overline-style', '')
underline_style = self.options.get('underline-style', '=')
def report_load_failure(mgr, ep, err):
LOG.warning(u'Failed to load %s: %s' % (ep.module, err))
mgr = extension.ExtensionManager(
result = ViewList()
titlecase = 'titlecase' in self.options
if 'detailed' in self.options:
data = _detailed_list(
mgr, over=overline_style, under=underline_style,
data = _simple_list(mgr)
for text, source in data:
for line in text.splitlines():
result.append(line, source)
# Parse what we have into a new section.
node = nodes.section()
node.document = self.state.document
nested_parse_with_titles(self.state, result, node)
return node.children
def setup(app):'loading stevedore.sphinxext')
app.add_directive('list-plugins', ListPluginsDirective)
return {
'parallel_read_safe': True,
'parallel_write_safe': True,