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#!/usr/bin/env python3

# -*- coding: utf-8 -*-

# Check for stylistic and formal issues in .rst and .py

# files included in the documentation.

# 01/2009, Georg Brandl

# TODO: - wrong versions in versionadded/changed

# - wrong markup after versionchanged directive

from __future__ import with_statement

import os

import re

import sys

import getopt

from os.path import join, splitext, abspath, exists

from collections import defaultdict

directives = [

# standard docutils ones

'admonition', 'attention', 'caution', 'class', 'compound', 'container',

'contents', 'csv-table', 'danger', 'date', 'default-role', 'epigraph',

'error', 'figure', 'footer', 'header', 'highlights', 'hint', 'image',

'important', 'include', 'line-block', 'list-table', 'meta', 'note',

'parsed-literal', 'pull-quote', 'raw', 'replace',

'restructuredtext-test-directive', 'role', 'rubric', 'sectnum', 'sidebar',

'table', 'target-notes', 'tip', 'title', 'topic', 'unicode', 'warning',

# Sphinx and Python docs custom ones

'acks', 'attribute', 'autoattribute', 'autoclass', 'autodata',

'autoexception', 'autofunction', 'automethod', 'automodule', 'centered',

'cfunction', 'class', 'classmethod', 'cmacro', 'cmdoption', 'cmember',

'code-block', 'confval', 'cssclass', 'ctype', 'currentmodule', 'cvar',

'data', 'decorator', 'decoratormethod', 'deprecated-removed',

'deprecated(?!-removed)', 'describe', 'directive', 'doctest', 'envvar',

'event', 'exception', 'function', 'glossary', 'highlight', 'highlightlang',

'impl-detail', 'index', 'literalinclude', 'method', 'miscnews', 'module',

'moduleauthor', 'opcode', 'pdbcommand', 'productionlist',

'program', 'role', 'sectionauthor', 'seealso', 'sourcecode', 'staticmethod',

'tabularcolumns', 'testcode', 'testoutput', 'testsetup', 'toctree', 'todo',

'todolist', 'versionadded', 'versionchanged'

]

all_directives = '(' + '|'.join(directives) + ')'

seems_directive_re = re.compile(r'(?<!\.)\.\. %s([^a-z:]|:(?!:))' % all_directives)

default_role_re = re.compile(r'(^| )`\w([^`]*?\w)?`($| )')

leaked_markup_re = re.compile(r'[a-z]::\s|`|\.\.\s*\w+:')

checkers = {}

checker_props = {'severity': 1, 'falsepositives': False}

def checker(*suffixes, **kwds):

"""Decorator to register a function as a checker."""

def deco(func):

for suffix in suffixes:

checkers.setdefault(suffix, []).append(func)

for prop in checker_props:

setattr(func, prop, kwds.get(prop, checker_props[prop]))

return func

return deco

@checker('.py', severity=4)

def check_syntax(fn, lines):

"""Check Python examples for valid syntax."""

code = ''.join(lines)

if '\r' in code:

if os.name != 'nt':

yield 0, '\\r in code file'

code = code.replace('\r', '')

try:

compile(code, fn, 'exec')

except SyntaxError as err:

yield err.lineno, 'not compilable: %s' % err

@checker('.rst', severity=2)

def check_suspicious_constructs(fn, lines):

"""Check for suspicious reST constructs."""

inprod = False

for lno, line in enumerate(lines):

if seems_directive_re.search(line):

yield lno+1, 'comment seems to be intended as a directive'

if '.. productionlist::' in line:

inprod = True

elif not inprod and default_role_re.search(line):

yield lno+1, 'default role used'

elif inprod and not line.strip():

inprod = False

@checker('.py', '.rst')

def check_whitespace(fn, lines):

"""Check for whitespace and line length issues."""

for lno, line in enumerate(lines):

if '\r' in line:

yield lno+1, '\\r in line'

if '\t' in line:

yield lno+1, 'OMG TABS!!!1'

if line[:-1].rstrip(' \t') != line[:-1]:

yield lno+1, 'trailing whitespace'

@checker('.rst', severity=0)

def check_line_length(fn, lines):

"""Check for line length; this checker is not run by default."""

for lno, line in enumerate(lines):

if len(line) > 81:

# don't complain about tables, links and function signatures

if line.lstrip()[0] not in '+|' and \

'http://' not in line and \

not line.lstrip().startswith(('.. function',

'.. method',

'.. cfunction')):

yield lno+1, "line too long"

@checker('.html', severity=2, falsepositives=True)

def check_leaked_markup(fn, lines):

"""Check HTML files for leaked reST markup; this only works if

the HTML files have been built.

"""

for lno, line in enumerate(lines):

if leaked_markup_re.search(line):

yield lno+1, 'possibly leaked markup: %r' % line

def main(argv):

usage = '''\

Usage: %s [-v] [-f] [-s sev] [-i path]* [path]

Options: -v verbose (print all checked file names)

-f enable checkers that yield many false positives

-s sev only show problems with severity >= sev

-i path ignore subdir or file path

''' % argv[0]

try:

gopts, args = getopt.getopt(argv[1:], 'vfs:i:')

except getopt.GetoptError:

print(usage)

return 2

verbose = False

severity = 1

ignore = []

falsepos = False

for opt, val in gopts:

if opt == '-v':

verbose = True

elif opt == '-f':

falsepos = True

elif opt == '-s':

severity = int(val)

elif opt == '-i':

ignore.append(abspath(val))

if len(args) == 0:

path = '.'

elif len(args) == 1:

path = args[0]

else:

print(usage)

return 2

if not exists(path):

print('Error: path %s does not exist' % path)

return 2

count = defaultdict(int)

for root, dirs, files in os.walk(path):

# ignore subdirs in ignore list

if abspath(root) in ignore:

del dirs[:]

continue

for fn in files:

fn = join(root, fn)

if fn[:2] == './':

fn = fn[2:]

# ignore files in ignore list

if abspath(fn) in ignore:

continue

ext = splitext(fn)[1]

checkerlist = checkers.get(ext, None)

if not checkerlist:

continue

if verbose:

print('Checking %s...' % fn)

try:

with open(fn, 'r', encoding='utf-8') as f:

lines = list(f)

except (IOError, OSError) as err:

print('%s: cannot open: %s' % (fn, err))

count[4] += 1

continue

for checker in checkerlist:

if checker.falsepositives and not falsepos:

continue

csev = checker.severity

if csev >= severity:

for lno, msg in checker(fn, lines):

print('[%d] %s:%d: %s' % (csev, fn, lno, msg))

count[csev] += 1

if verbose:

print()

if not count:

if severity > 1:

print('No problems with severity >= %d found.' % severity)

else:

print('No problems found.')

else:

for severity in sorted(count):

number = count[severity]

print('%d problem%s with severity %d found.' %

(number, number > 1 and 's' or '', severity))

return int(bool(count))

if __name__ == '__main__':

sys.exit(main(sys.argv))

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