303 lines
11 KiB
Python
303 lines
11 KiB
Python
#
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# The Qubes OS Project, https://www.qubes-os.org/
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#
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# Copyright (C) 2010-2015 Joanna Rutkowska <joanna@invisiblethingslab.com>
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# Copyright (C) 2014-2015 Wojtek Porczyk <woju@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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'''Documentation helpers.
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This module contains classes and functions which help to maintain documentation,
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particularly our custom Sphinx extension.
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'''
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import argparse
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import io
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import os
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import re
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import docutils
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import docutils.nodes
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import docutils.parsers.rst
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import docutils.parsers.rst.roles
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import docutils.statemachine
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import sphinx
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import sphinx.errors
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import sphinx.locale
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import sphinx.util.docfields
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import qubesadmin.tools
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SUBCOMMANDS_TITLE = 'COMMANDS'
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OPTIONS_TITLE = 'OPTIONS'
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def make_rst_section(heading, char):
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'''Format a section header in rst'''
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return '{}\n{}\n\n'.format(heading, char[0] * len(heading))
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def prepare_manpage(command):
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'''Build a man page skeleton'''
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parser = qubesadmin.tools.get_parser_for_command(command)
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stream = io.StringIO()
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stream.write('.. program:: {}\n\n'.format(command))
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stream.write(make_rst_section(
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':program:`{}` -- {}'.format(command, parser.description), '='))
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stream.write('''.. warning::
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This page was autogenerated from command-line parser. It shouldn't be 1:1
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conversion, because it would add little value. Please revise it and add
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more descriptive help, which normally won't fit in standard ``--help``
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option.
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After rewrite, please remove this admonition.\n\n''')
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stream.write(make_rst_section('Synopsis', '-'))
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usage = ' '.join(parser.format_usage().strip().split())
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if usage.startswith('usage: '):
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usage = usage[len('usage: '):]
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# replace METAVARS with *METAVARS*
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usage = re.sub(r'\b([A-Z]{2,})\b', r'*\1*', usage)
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stream.write(':command:`{}` {}\n\n'.format(command, usage))
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stream.write(make_rst_section('Options', '-'))
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for action in parser._actions: # pylint: disable=protected-access
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stream.write('.. option:: ')
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if action.metavar:
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stream.write(', '.join('{}{}{}'.format(
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option,
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'=' if option.startswith('--') else ' ',
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action.metavar)
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for option in sorted(action.option_strings)))
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else:
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stream.write(', '.join(sorted(action.option_strings)))
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stream.write('\n\n {}\n\n'.format(action.help))
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stream.write(make_rst_section('Authors', '-'))
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stream.write('''\
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| Joanna Rutkowska <joanna at invisiblethingslab dot com>
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| Rafal Wojtczuk <rafal at invisiblethingslab dot com>
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| Marek Marczykowski <marmarek at invisiblethingslab dot com>
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| Wojtek Porczyk <woju at invisiblethingslab dot com>
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.. vim: ts=3 sw=3 et tw=80
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''')
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return stream.getvalue()
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class OptionsCheckVisitor(docutils.nodes.SparseNodeVisitor):
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''' Checks if the visited option nodes and the specified args are in sync.
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'''
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def __init__(self, command, args, document):
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assert isinstance(args, set)
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docutils.nodes.SparseNodeVisitor.__init__(self, document)
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self.command = command
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self.args = args
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def visit_desc(self, node):
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''' Skips all but 'option' elements '''
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# pylint: disable=no-self-use
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if not node.get('desctype', None) == 'option':
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raise docutils.nodes.SkipChildren
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def visit_desc_name(self, node):
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''' Checks if the option is defined `self.args` '''
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if not isinstance(node[0], docutils.nodes.Text):
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raise sphinx.errors.SphinxError('first child should be Text')
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arg = str(node[0])
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try:
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self.args.remove(arg)
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except KeyError:
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raise sphinx.errors.SphinxError(
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'No such argument for {!r}: {!r}'.format(self.command, arg))
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def check_undocumented_arguments(self, ignored_options=None):
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''' Call this to check if any undocumented arguments are left.
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While the documentation talks about a
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'SparseNodeVisitor.depart_document()' function, this function does
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not exists. (For details see implementation of
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:py:method:`NodeVisitor.dispatch_departure()`) So we need to
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manually call this.
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'''
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if ignored_options is None:
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ignored_options = set()
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left_over_args = self.args - ignored_options
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if left_over_args:
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raise sphinx.errors.SphinxError(
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'Undocumented arguments for command {!r}: {!r}'.format(
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self.command, ', '.join(sorted(left_over_args))))
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class CommandCheckVisitor(docutils.nodes.SparseNodeVisitor):
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''' Checks if the visited sub command section nodes and the specified sub
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command args are in sync.
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'''
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def __init__(self, command, sub_commands, document):
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docutils.nodes.SparseNodeVisitor.__init__(self, document)
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self.command = command
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self.sub_commands = sub_commands
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def visit_section(self, node):
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''' Checks if the visited sub-command section nodes exists and it
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options are in sync.
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Uses :py:class:`OptionsCheckVisitor` for checking
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sub-commands options
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'''
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# pylint: disable=no-self-use
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title = str(node[0][0])
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if title.upper() == SUBCOMMANDS_TITLE:
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return
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sub_cmd = self.command + ' ' + title
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try:
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args = self.sub_commands[title]
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options_visitor = OptionsCheckVisitor(sub_cmd, args, self.document)
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node.walkabout(options_visitor)
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options_visitor.check_undocumented_arguments(
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{'--help', '--quiet', '--verbose', '-h', '-q', '-v'})
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del self.sub_commands[title]
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except KeyError:
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raise sphinx.errors.SphinxError(
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'No such sub-command {!r}'.format(sub_cmd))
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def visit_Text(self, node):
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''' If the visited text node starts with 'alias: ', all the provided
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comma separted alias in this node, are removed from
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`self.sub_commands`
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'''
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# pylint: disable=invalid-name
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text = str(node).strip()
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if text.startswith('aliases:'):
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aliases = {a.strip() for a in text.split('aliases:')[1].split(',')}
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for alias in aliases:
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assert alias in self.sub_commands
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del self.sub_commands[alias]
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def check_undocumented_sub_commands(self):
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''' Call this to check if any undocumented sub_commands are left.
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While the documentation talks about a
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'SparseNodeVisitor.depart_document()' function, this function does
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not exists. (For details see implementation of
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:py:method:`NodeVisitor.dispatch_departure()`) So we need to
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manually call this.
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'''
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if self.sub_commands:
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raise sphinx.errors.SphinxError(
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'Undocumented commands for {!r}: {!r}'.format(
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self.command, ', '.join(sorted(self.sub_commands.keys()))))
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class ManpageCheckVisitor(docutils.nodes.SparseNodeVisitor):
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''' Checks if the sub-commands and options specified in the 'COMMAND' and
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'OPTIONS' (case insensitve) sections in sync the command parser.
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'''
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def __init__(self, app, command, document):
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docutils.nodes.SparseNodeVisitor.__init__(self, document)
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try:
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parser = qubesadmin.tools.get_parser_for_command(command)
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except ImportError:
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app.warn('cannot import module for command')
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self.parser = None
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return
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except AttributeError:
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raise sphinx.errors.SphinxError('cannot find parser in module')
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self.command = command
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self.parser = parser
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self.options = set()
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self.sub_commands = {}
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self.app = app
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# pylint: disable=protected-access
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for action in parser._actions:
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if action.help == argparse.SUPPRESS:
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continue
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if issubclass(action.__class__,
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qubesadmin.tools.AliasedSubParsersAction):
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for cmd, cmd_parser in action._name_parser_map.items():
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self.sub_commands[cmd] = set()
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for sub_action in cmd_parser._actions:
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if sub_action.help != argparse.SUPPRESS:
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self.sub_commands[cmd].update(
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sub_action.option_strings)
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else:
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self.options.update(action.option_strings)
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def visit_section(self, node):
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''' If section title is OPTIONS or COMMANDS dispatch the apropriate
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`NodeVisitor`.
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'''
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if self.parser is None:
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return
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section_title = str(node[0][0]).upper()
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if section_title == OPTIONS_TITLE:
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options_visitor = OptionsCheckVisitor(self.command, self.options,
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self.document)
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node.walkabout(options_visitor)
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options_visitor.check_undocumented_arguments()
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elif section_title == SUBCOMMANDS_TITLE:
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sub_cmd_visitor = CommandCheckVisitor(
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self.command, self.sub_commands, self.document)
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node.walkabout(sub_cmd_visitor)
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sub_cmd_visitor.check_undocumented_sub_commands()
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def check_man_args(app, doctree, docname):
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''' Checks the manpage for undocumented or obsolete sub-commands and
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options.
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'''
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dirname, command = os.path.split(docname)
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if os.path.basename(dirname) != 'manpages':
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return
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app.info('Checking arguments for {!r}'.format(command))
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doctree.walk(ManpageCheckVisitor(app, command, doctree))
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def break_to_pdb(app, *_dummy):
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'''DEBUG'''
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if not app.config.break_to_pdb:
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return
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import pdb
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pdb.set_trace()
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def setup(app):
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'''Setup Sphinx extension'''
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app.add_config_value('break_to_pdb', False, 'env')
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app.connect('doctree-resolved', break_to_pdb)
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app.connect('doctree-resolved', check_man_args)
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# vim: ts=4 sw=4 et
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