/usr/lib/python3/dist-packages/sphinx/ext/autosummary/__init__.py is in python3-sphinx 1.3.6-2ubuntu1.
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"""
sphinx.ext.autosummary
~~~~~~~~~~~~~~~~~~~~~~
Sphinx extension that adds an autosummary:: directive, which can be
used to generate function/method/attribute/etc. summary lists, similar
to those output eg. by Epydoc and other API doc generation tools.
An :autolink: role is also provided.
autosummary directive
---------------------
The autosummary directive has the form::
.. autosummary::
:nosignatures:
:toctree: generated/
module.function_1
module.function_2
...
and it generates an output table (containing signatures, optionally)
======================== =============================================
module.function_1(args) Summary line from the docstring of function_1
module.function_2(args) Summary line from the docstring
...
======================== =============================================
If the :toctree: option is specified, files matching the function names
are inserted to the toctree with the given prefix:
generated/module.function_1
generated/module.function_2
...
Note: The file names contain the module:: or currentmodule:: prefixes.
.. seealso:: autosummary_generate.py
autolink role
-------------
The autolink role functions as ``:obj:`` when the name referred can be
resolved to a Python object, and otherwise it becomes simple emphasis.
This can be used as the default role to make links 'smart'.
:copyright: Copyright 2007-2016 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import os
import re
import sys
import inspect
import posixpath
from types import ModuleType
from six import text_type
from docutils.parsers.rst import directives
from docutils.statemachine import ViewList
from docutils import nodes
import sphinx
from sphinx import addnodes
from sphinx.util.compat import Directive
from sphinx.pycode import ModuleAnalyzer, PycodeError
from sphinx.ext.autodoc import Options
# -- autosummary_toc node ------------------------------------------------------
class autosummary_toc(nodes.comment):
pass
def process_autosummary_toc(app, doctree):
"""Insert items described in autosummary:: to the TOC tree, but do
not generate the toctree:: list.
"""
env = app.builder.env
crawled = {}
def crawl_toc(node, depth=1):
crawled[node] = True
for j, subnode in enumerate(node):
try:
if (isinstance(subnode, autosummary_toc) and
isinstance(subnode[0], addnodes.toctree)):
env.note_toctree(env.docname, subnode[0])
continue
except IndexError:
continue
if not isinstance(subnode, nodes.section):
continue
if subnode not in crawled:
crawl_toc(subnode, depth+1)
crawl_toc(doctree)
def autosummary_toc_visit_html(self, node):
"""Hide autosummary toctree list in HTML output."""
raise nodes.SkipNode
def autosummary_noop(self, node):
pass
# -- autosummary_table node ----------------------------------------------------
class autosummary_table(nodes.comment):
pass
def autosummary_table_visit_html(self, node):
"""Make the first column of the table non-breaking."""
try:
tbody = node[0][0][-1]
for row in tbody:
col1_entry = row[0]
par = col1_entry[0]
for j, subnode in enumerate(list(par)):
if isinstance(subnode, nodes.Text):
new_text = text_type(subnode.astext())
new_text = new_text.replace(u" ", u"\u00a0")
par[j] = nodes.Text(new_text)
except IndexError:
pass
# -- autodoc integration -------------------------------------------------------
class FakeDirective:
env = {}
genopt = Options()
def get_documenter(obj, parent):
"""Get an autodoc.Documenter class suitable for documenting the given
object.
*obj* is the Python object to be documented, and *parent* is an
another Python object (e.g. a module or a class) to which *obj*
belongs to.
"""
from sphinx.ext.autodoc import AutoDirective, DataDocumenter, \
ModuleDocumenter
if inspect.ismodule(obj):
# ModuleDocumenter.can_document_member always returns False
return ModuleDocumenter
# Construct a fake documenter for *parent*
if parent is not None:
parent_doc_cls = get_documenter(parent, None)
else:
parent_doc_cls = ModuleDocumenter
if hasattr(parent, '__name__'):
parent_doc = parent_doc_cls(FakeDirective(), parent.__name__)
else:
parent_doc = parent_doc_cls(FakeDirective(), "")
# Get the corrent documenter class for *obj*
classes = [cls for cls in AutoDirective._registry.values()
if cls.can_document_member(obj, '', False, parent_doc)]
if classes:
classes.sort(key=lambda cls: cls.priority)
return classes[-1]
else:
return DataDocumenter
# -- .. autosummary:: ----------------------------------------------------------
class Autosummary(Directive):
"""
Pretty table containing short signatures and summaries of functions etc.
autosummary can also optionally generate a hidden toctree:: node.
"""
required_arguments = 0
optional_arguments = 0
final_argument_whitespace = False
has_content = True
option_spec = {
'toctree': directives.unchanged,
'nosignatures': directives.flag,
'template': directives.unchanged,
}
def warn(self, msg):
self.warnings.append(self.state.document.reporter.warning(
msg, line=self.lineno))
def run(self):
self.env = env = self.state.document.settings.env
self.genopt = Options()
self.warnings = []
self.result = ViewList()
names = [x.strip().split()[0] for x in self.content
if x.strip() and re.search(r'^[~a-zA-Z_]', x.strip()[0])]
items = self.get_items(names)
nodes = self.get_table(items)
if 'toctree' in self.options:
dirname = posixpath.dirname(env.docname)
tree_prefix = self.options['toctree'].strip()
docnames = []
for name, sig, summary, real_name in items:
docname = posixpath.join(tree_prefix, real_name)
docname = posixpath.normpath(posixpath.join(dirname, docname))
if docname not in env.found_docs:
self.warn('toctree references unknown document %r'
% docname)
docnames.append(docname)
tocnode = addnodes.toctree()
tocnode['includefiles'] = docnames
tocnode['entries'] = [(None, docn) for docn in docnames]
tocnode['maxdepth'] = -1
tocnode['glob'] = None
tocnode = autosummary_toc('', '', tocnode)
nodes.append(tocnode)
return self.warnings + nodes
def get_items(self, names):
"""Try to import the given names, and return a list of
``[(name, signature, summary_string, real_name), ...]``.
"""
env = self.state.document.settings.env
prefixes = get_import_prefixes_from_env(env)
items = []
max_item_chars = 50
for name in names:
display_name = name
if name.startswith('~'):
name = name[1:]
display_name = name.split('.')[-1]
try:
real_name, obj, parent, modname = import_by_name(name, prefixes=prefixes)
except ImportError:
self.warn('failed to import %s' % name)
items.append((name, '', '', name))
continue
self.result = ViewList() # initialize for each documenter
full_name = real_name
if not isinstance(obj, ModuleType):
# give explicitly separated module name, so that members
# of inner classes can be documented
full_name = modname + '::' + full_name[len(modname)+1:]
# NB. using full_name here is important, since Documenters
# handle module prefixes slightly differently
documenter = get_documenter(obj, parent)(self, full_name)
if not documenter.parse_name():
self.warn('failed to parse name %s' % real_name)
items.append((display_name, '', '', real_name))
continue
if not documenter.import_object():
self.warn('failed to import object %s' % real_name)
items.append((display_name, '', '', real_name))
continue
if documenter.options.members and not documenter.check_module():
continue
# try to also get a source code analyzer for attribute docs
try:
documenter.analyzer = ModuleAnalyzer.for_module(
documenter.get_real_modname())
# parse right now, to get PycodeErrors on parsing (results will
# be cached anyway)
documenter.analyzer.find_attr_docs()
except PycodeError as err:
documenter.env.app.debug(
'[autodoc] module analyzer failed: %s', err)
# no source file -- e.g. for builtin and C modules
documenter.analyzer = None
# -- Grab the signature
sig = documenter.format_signature()
if not sig:
sig = ''
else:
max_chars = max(10, max_item_chars - len(display_name))
sig = mangle_signature(sig, max_chars=max_chars)
sig = sig.replace('*', r'\*')
# -- Grab the summary
documenter.add_content(None)
doc = list(documenter.process_doc([self.result.data]))
while doc and not doc[0].strip():
doc.pop(0)
# If there's a blank line, then we can assume the first sentence /
# paragraph has ended, so anything after shouldn't be part of the
# summary
for i, piece in enumerate(doc):
if not piece.strip():
doc = doc[:i]
break
# Try to find the "first sentence", which may span multiple lines
m = re.search(r"^([A-Z].*?\.)(?:\s|$)", " ".join(doc).strip())
if m:
summary = m.group(1).strip()
elif doc:
summary = doc[0].strip()
else:
summary = ''
items.append((display_name, sig, summary, real_name))
return items
def get_table(self, items):
"""Generate a proper list of table nodes for autosummary:: directive.
*items* is a list produced by :meth:`get_items`.
"""
table_spec = addnodes.tabular_col_spec()
table_spec['spec'] = 'll'
table = autosummary_table('')
real_table = nodes.table('', classes=['longtable'])
table.append(real_table)
group = nodes.tgroup('', cols=2)
real_table.append(group)
group.append(nodes.colspec('', colwidth=10))
group.append(nodes.colspec('', colwidth=90))
body = nodes.tbody('')
group.append(body)
def append_row(*column_texts):
row = nodes.row('')
for text in column_texts:
node = nodes.paragraph('')
vl = ViewList()
vl.append(text, '<autosummary>')
self.state.nested_parse(vl, 0, node)
try:
if isinstance(node[0], nodes.paragraph):
node = node[0]
except IndexError:
pass
row.append(nodes.entry('', node))
body.append(row)
for name, sig, summary, real_name in items:
qualifier = 'obj'
if 'nosignatures' not in self.options:
col1 = ':%s:`%s <%s>`\ %s' % (qualifier, name, real_name, sig)
else:
col1 = ':%s:`%s <%s>`' % (qualifier, name, real_name)
col2 = summary
append_row(col1, col2)
return [table_spec, table]
def mangle_signature(sig, max_chars=30):
"""Reformat a function signature to a more compact form."""
s = re.sub(r"^\((.*)\)$", r"\1", sig).strip()
# Strip strings (which can contain things that confuse the code below)
s = re.sub(r"\\\\", "", s)
s = re.sub(r"\\'", "", s)
s = re.sub(r"'[^']*'", "", s)
# Parse the signature to arguments + options
args = []
opts = []
opt_re = re.compile(r"^(.*, |)([a-zA-Z0-9_*]+)=")
while s:
m = opt_re.search(s)
if not m:
# The rest are arguments
args = s.split(', ')
break
opts.insert(0, m.group(2))
s = m.group(1)[:-2]
# Produce a more compact signature
sig = limited_join(", ", args, max_chars=max_chars-2)
if opts:
if not sig:
sig = "[%s]" % limited_join(", ", opts, max_chars=max_chars-4)
elif len(sig) < max_chars - 4 - 2 - 3:
sig += "[, %s]" % limited_join(", ", opts,
max_chars=max_chars-len(sig)-4-2)
return u"(%s)" % sig
def limited_join(sep, items, max_chars=30, overflow_marker="..."):
"""Join a number of strings to one, limiting the length to *max_chars*.
If the string overflows this limit, replace the last fitting item by
*overflow_marker*.
Returns: joined_string
"""
full_str = sep.join(items)
if len(full_str) < max_chars:
return full_str
n_chars = 0
n_items = 0
for j, item in enumerate(items):
n_chars += len(item) + len(sep)
if n_chars < max_chars - len(overflow_marker):
n_items += 1
else:
break
return sep.join(list(items[:n_items]) + [overflow_marker])
# -- Importing items -----------------------------------------------------------
def get_import_prefixes_from_env(env):
"""
Obtain current Python import prefixes (for `import_by_name`)
from ``document.env``
"""
prefixes = [None]
currmodule = env.ref_context.get('py:module')
if currmodule:
prefixes.insert(0, currmodule)
currclass = env.ref_context.get('py:class')
if currclass:
if currmodule:
prefixes.insert(0, currmodule + "." + currclass)
else:
prefixes.insert(0, currclass)
return prefixes
def import_by_name(name, prefixes=[None]):
"""Import a Python object that has the given *name*, under one of the
*prefixes*. The first name that succeeds is used.
"""
tried = []
for prefix in prefixes:
try:
if prefix:
prefixed_name = '.'.join([prefix, name])
else:
prefixed_name = name
obj, parent, modname = _import_by_name(prefixed_name)
return prefixed_name, obj, parent, modname
except ImportError:
tried.append(prefixed_name)
raise ImportError('no module named %s' % ' or '.join(tried))
def _import_by_name(name):
"""Import a Python object given its full name."""
try:
name_parts = name.split('.')
# try first interpret `name` as MODNAME.OBJ
modname = '.'.join(name_parts[:-1])
if modname:
try:
__import__(modname)
mod = sys.modules[modname]
return getattr(mod, name_parts[-1]), mod, modname
except (ImportError, IndexError, AttributeError):
pass
# ... then as MODNAME, MODNAME.OBJ1, MODNAME.OBJ1.OBJ2, ...
last_j = 0
modname = None
for j in reversed(range(1, len(name_parts)+1)):
last_j = j
modname = '.'.join(name_parts[:j])
try:
__import__(modname)
except ImportError:
continue
if modname in sys.modules:
break
if last_j < len(name_parts):
parent = None
obj = sys.modules[modname]
for obj_name in name_parts[last_j:]:
parent = obj
obj = getattr(obj, obj_name)
return obj, parent, modname
else:
return sys.modules[modname], None, modname
except (ValueError, ImportError, AttributeError, KeyError) as e:
raise ImportError(*e.args)
# -- :autolink: (smart default role) -------------------------------------------
def autolink_role(typ, rawtext, etext, lineno, inliner,
options={}, content=[]):
"""Smart linking role.
Expands to ':obj:`text`' if `text` is an object that can be imported;
otherwise expands to '*text*'.
"""
env = inliner.document.settings.env
r = env.get_domain('py').role('obj')(
'obj', rawtext, etext, lineno, inliner, options, content)
pnode = r[0][0]
prefixes = get_import_prefixes_from_env(env)
try:
name, obj, parent, modname = import_by_name(pnode['reftarget'], prefixes)
except ImportError:
content = pnode[0]
r[0][0] = nodes.emphasis(rawtext, content[0].astext(),
classes=content['classes'])
return r
def process_generate_options(app):
genfiles = app.config.autosummary_generate
if genfiles and not hasattr(genfiles, '__len__'):
env = app.builder.env
genfiles = [env.doc2path(x, base=None) for x in env.found_docs
if os.path.isfile(env.doc2path(x))]
if not genfiles:
return
from sphinx.ext.autosummary.generate import generate_autosummary_docs
ext = app.config.source_suffix[0]
genfiles = [genfile + (not genfile.endswith(ext) and ext or '')
for genfile in genfiles]
generate_autosummary_docs(genfiles, builder=app.builder,
warn=app.warn, info=app.info, suffix=ext,
base_path=app.srcdir)
def setup(app):
# I need autodoc
app.setup_extension('sphinx.ext.autodoc')
app.add_node(autosummary_toc,
html=(autosummary_toc_visit_html, autosummary_noop),
latex=(autosummary_noop, autosummary_noop),
text=(autosummary_noop, autosummary_noop),
man=(autosummary_noop, autosummary_noop),
texinfo=(autosummary_noop, autosummary_noop))
app.add_node(autosummary_table,
html=(autosummary_table_visit_html, autosummary_noop),
latex=(autosummary_noop, autosummary_noop),
text=(autosummary_noop, autosummary_noop),
man=(autosummary_noop, autosummary_noop),
texinfo=(autosummary_noop, autosummary_noop))
app.add_directive('autosummary', Autosummary)
app.add_role('autolink', autolink_role)
app.connect('doctree-read', process_autosummary_toc)
app.connect('builder-inited', process_generate_options)
app.add_config_value('autosummary_generate', [], True)
return {'version': sphinx.__display_version__, 'parallel_read_safe': True}
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