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cpython/Doc/tools/rstlint.py

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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
import os
import re
import sys
import getopt
from string import ascii_letters
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',
'availability', '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'
]
roles = [
"(?<!py):class:",
"(?<!:c|py):func:",
"(?<!py):meth:",
"(?<!:py):mod:",
":exc:",
":issue:",
":attr:",
":c:func:",
":ref:",
":const:",
":term:",
"(?<!:c|py):data:",
":keyword:",
":file:",
":pep:",
":c:type:",
":c:member:",
":option:",
":rfc:",
":envvar:",
":c:data:",
":source:",
":mailheader:",
":program:",
":c:macro:",
":dfn:",
":kbd:",
":command:",
":mimetype:",
":opcode:",
":manpage:",
":py:data:",
":RFC:",
":pdbcmd:",
":abbr:",
":samp:",
":token:",
":PEP:",
":sup:",
":py:class:",
":menuselection:",
":doc:",
":sub:",
":py:meth:",
":newsgroup:",
":code:",
":py:func:",
":makevar:",
":guilabel:",
":title-reference:",
":py:mod:",
":download:",
":2to3fixer:",
]
all_directives = "(" + "|".join(directives) + ")"
all_roles = "(" + "|".join(roles) + ")"
# Find comments that looks like a directive, like:
# .. versionchanged 3.6
# or
# .. versionchanged: 3.6
# as it should be:
# .. versionchanged:: 3.6
seems_directive_re = re.compile(r"(?<!\.)\.\. %s([^a-z:]|:(?!:))" % all_directives)
# Find directive prefixed with three dots instead of two, like:
# ... versionchanged:: 3.6
# instead of:
# .. versionchanged:: 3.6
three_dot_directive_re = re.compile(r"\.\.\. %s::" % all_directives)
# Find role used with double backticks instead of simple backticks like:
# :const:``None``
# instead of:
# :const:`None`
double_backtick_role = re.compile(r"(?<!``)%s``" % all_roles)
# Find role used with no backticks instead of simple backticks like:
# :const:None
# instead of:
# :const:`None`
role_with_no_backticks = re.compile(r"%s[^` ]" % all_roles)
# Find role glued with another word like:
# the:c:func:`PyThreadState_LeaveTracing` function.
# instead of:
# the :c:func:`PyThreadState_LeaveTracing` function.
role_glued_with_word = re.compile(r"[a-zA-Z]%s" % all_roles)
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, start=1):
if seems_directive_re.search(line):
yield lno, "comment seems to be intended as a directive"
if three_dot_directive_re.search(line):
yield lno, "directive should start with two dots, not three."
if double_backtick_role.search(line):
yield lno, "role use a single backtick, double backtick found."
if role_with_no_backticks.search(line):
yield lno, "role use a single backtick, no backtick found."
if role_glued_with_word.search(line):
yield lno, "missing space before role"
if ".. productionlist::" in line:
inprod = True
elif not inprod and default_role_re.search(line):
yield lno, "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 hide_literal_blocks(lines):
"""Tool to remove literal blocks from given lines.
It yields empty lines in place of blocks, so line numbers are
still meaningful.
"""
in_block = False
for line in lines:
if line.endswith("::\n"):
in_block = True
elif in_block:
if line == "\n" or line.startswith(" "):
line = "\n"
else:
in_block = False
yield line
def type_of_explicit_markup(line):
if re.match(fr'\.\. {all_directives}::', line):
return 'directive'
if re.match(r'\.\. \[[0-9]+\] ', line):
return 'footnote'
if re.match(r'\.\. \[[^\]]+\] ', line):
return 'citation'
if re.match(r'\.\. _.*[^_]: ', line):
return 'target'
if re.match(r'\.\. \|[^\|]*\| ', line):
return 'substitution_definition'
return 'comment'
def hide_comments(lines):
"""Tool to remove comments from given lines.
It yields empty lines in place of comments, so line numbers are
still meaningful.
"""
in_multiline_comment = False
for line in lines:
if line == "..\n":
in_multiline_comment = True
elif in_multiline_comment:
if line == "\n" or line.startswith(" "):
line = "\n"
else:
in_multiline_comment = False
if line.startswith(".. ") and type_of_explicit_markup(line) == 'comment':
line = "\n"
yield line
@checker(".rst", severity=2)
def check_missing_surrogate_space_on_plural(fn, lines):
r"""Check for missing 'backslash-space' between a code sample a letter.
Good: ``Point``\ s
Bad: ``Point``s
"""
in_code_sample = False
check_next_one = False
for lno, line in enumerate(hide_comments(hide_literal_blocks(lines))):
tokens = line.split("``")
for token_no, token in enumerate(tokens):
if check_next_one:
if token[0] in ascii_letters:
yield lno + 1, f"Missing backslash-space between code sample and {token!r}."
check_next_one = False
if token_no == len(tokens) - 1:
continue
if in_code_sample:
check_next_one = True
in_code_sample = not in_code_sample
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)
print("""⚠ rstlint.py is no longer maintained here and will be removed
⚠ in a future release.
⚠ Please use https://pypi.org/p/sphinx-lint instead.
""")
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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