Source code for sphinx_toolbox.flake8

#!/usr/bin/env python3
#
#  flake8.py
r"""
A Sphinx directive for documenting flake8 codes.

.. versionadded:: 1.6.0
.. extensions:: sphinx_toolbox.flake8


Usage
------

.. rst:directive:: .. flake8-codes:: plugin

	Adds a table documenting a flake8 plugin's codes.

	The directive takes a single argument -- the fully qualified name of the flake8 plugin module.

	Codes to document are given in the body of the directive.


	:bold-title:`Example`

	.. rest-example::

		.. flake8-codes:: flake8_dunder_all

			DALL000


.. latex:clearpage::


API Reference
----------------
"""
#
#  Copyright © 2020-2021 Dominic Davis-Foster <dominic@davis-foster.co.uk>
#
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#  in the Software without restriction, including without limitation the rights
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#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
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#  The above copyright notice and this permission notice shall be included in all
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#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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#  OR OTHER DEALINGS IN THE SOFTWARE.
#

# stdlib
import warnings
from typing import List, Sequence, Tuple

# 3rd party
import docutils
import tabulate
from docutils import nodes
from docutils.statemachine import StringList
from sphinx.application import Sphinx
from sphinx.ext.autodoc.importer import import_module
from sphinx.util.docutils import SphinxDirective

# this package
from sphinx_toolbox.utils import Purger, SphinxExtMetadata, metadata_add_version

__all__ = ("Flake8CodesDirective", "setup")

table_node_purger = Purger("all_flake8_code_table_nodes")


[docs]class Flake8CodesDirective(SphinxDirective): """ A Sphinx directive for documenting flake8 codes. """ has_content: bool = True # the fully qualified name of the flake8 plugin module required_arguments: int = 1 def run(self) -> Sequence[nodes.Node]: # type: ignore[override] """ Process the content of the directive. """ plugin: str = self.arguments[0] if not self.content: warnings.warn("No codes specified") return [] module = import_module(plugin) codes: List[Tuple[str, str]] = [] for code in self.content: if code.strip(): if hasattr(module, code): description = getattr(module, code) if description.startswith(code): description = description[len(code):] codes.append((code, description.strip())) else: warnings.warn(f"No such code {code!r}") if not codes: warnings.warn("No codes specified") return [] targetid = f'flake8codes-{self.env.new_serialno("flake8codes"):d}' targetnode = nodes.section(ids=[targetid]) table = tabulate.tabulate(codes, headers=["Code", "Description"], tablefmt="rst") content = '\n' + table.replace('\t', " ") + '\n' view = StringList(content.split('\n')) table_node = nodes.paragraph(rawsource=content) self.state.nested_parse(view, self.content_offset, table_node) if docutils.__version_info__ >= (0, 18): table_node.children[0]["classes"] += ["colwidths-given"] # type: ignore[index] table_node_purger.add_node(self.env, table_node, targetnode, self.lineno) return [table_node]
[docs]@metadata_add_version def setup(app: Sphinx) -> SphinxExtMetadata: """ Setup :mod:`sphinx_toolbox.flake8`. :param app: The Sphinx application. """ app.add_directive("flake8-codes", Flake8CodesDirective) app.connect("env-purge-doc", table_node_purger.purge_nodes) return {"parallel_read_safe": True}