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# -*- coding: utf-8 -*-
# Copyright (c) 2006, 2009-2013 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2012-2014 Google, Inc.
# Copyright (c) 2014-2018 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2014 Brett Cannon <brett@python.org>
# Copyright (c) 2014 Alexandru Coman <fcoman@bitdefender.com>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2016 Łukasz Rogalski <rogalski.91@gmail.com>
# Copyright (c) 2016 glegoux <gilles.legoux@gmail.com>
# Copyright (c) 2017-2018 hippo91 <guillaume.peillex@gmail.com>
# Copyright (c) 2017 Mikhail Fesenko <proggga@gmail.com>
# Copyright (c) 2018 Ville Skyttä <ville.skytta@iki.fi>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
"""Check source code is ascii only or has an encoding declaration (PEP 263)"""
# pylint: disable=W0511
import re
from pylint.interfaces import IRawChecker
from pylint.checkers import BaseChecker
from pylint.utils import OPTION_RGX, MessagesHandlerMixIn
class ByIdManagedMessagesChecker(BaseChecker):
"""checks for messages that are enabled or disabled by id instead of symbol."""
__implements__ = IRawChecker
# configuration section name
name = "miscellaneous"
msgs = {
"I0023": (
"%s",
"use-symbolic-message-instead",
"Used when a message is enabled or disabled by id.",
)
}
options = ()
def process_module(self, module):
"""inspect the source file to find messages activated or deactivated by id."""
managed_msgs = MessagesHandlerMixIn.get_by_id_managed_msgs()
for (mod_name, msg_id, msg_symbol, lineno, is_disabled) in managed_msgs:
if mod_name == module.name:
if is_disabled:
txt = "Id '{ident}' is used to disable '{symbol}' message emission".format(
ident=msg_id, symbol=msg_symbol
)
else:
txt = "Id '{ident}' is used to enable '{symbol}' message emission".format(
ident=msg_id, symbol=msg_symbol
)
self.add_message("use-symbolic-message-instead", line=lineno, args=txt)
MessagesHandlerMixIn.clear_by_id_managed_msgs()
class EncodingChecker(BaseChecker):
"""checks for:
* warning notes in the code like FIXME, XXX
* encoding issues.
"""
__implements__ = IRawChecker
# configuration section name
name = "miscellaneous"
msgs = {
"W0511": (
"%s",
"fixme",
"Used when a warning note as FIXME or XXX is detected.",
),
"W0512": (
'Cannot decode using encoding "%s", unexpected byte at position %d',
"invalid-encoded-data",
"Used when a source line cannot be decoded using the specified "
"source file encoding.",
{"maxversion": (3, 0)},
),
}
options = (
(
"notes",
{
"type": "csv",
"metavar": "<comma separated values>",
"default": ("FIXME", "XXX", "TODO"),
"help": (
"List of note tags to take in consideration, "
"separated by a comma."
),
},
),
)
def _check_note(self, notes, lineno, line, module_last_lineno):
"""
Add the message 'fixme' in case a note is found in the line.
:param notes: regular expression object matching any notes
(XXX, TODO, FIXME) behind a '#'
:type notes: re.pattern object
:param lineno: line number
:type lineno: int
:param line: line to be checked
:type line: str
:param module_last_lineno: last line number of the module as parsed by astroid
(may be different from real last line number in case
commented lines exist at the end of the module)
:type module_last_lineno: int
"""
match = notes.search(line)
if not match:
return
# In case the module ends with commented lines, the astroid parser
# don't take into account those lines, then:
# - the line number of those lines is greater than the
# module last line number (module.tolineno)
# - astroid module object can't inform pylint
# of disabled messages in those extra lines.
if lineno > module_last_lineno:
disable_option_match = OPTION_RGX.search(line)
if disable_option_match:
try:
_, value = disable_option_match.group(1).split("=", 1)
values = [_val.strip().upper() for _val in value.split(",")]
if set(values) & set(self.config.notes):
return
except ValueError:
self.add_message(
"bad-inline-option",
args=disable_option_match.group(1).strip(),
line=line,
)
return
self.add_message(
"fixme",
args=line[match.start(1) :].rstrip(),
line=lineno,
col_offset=match.start(1),
)
def _check_encoding(self, lineno, line, file_encoding):
try:
return line.decode(file_encoding)
except UnicodeDecodeError as ex:
self.add_message(
"invalid-encoded-data", line=lineno, args=(file_encoding, ex.args[2])
)
except LookupError as ex:
if line.startswith("#") and "coding" in line and file_encoding in line:
self.add_message(
"syntax-error",
line=lineno,
args='Cannot decode using encoding "{}",'
" bad encoding".format(file_encoding),
)
def process_module(self, module):
"""inspect the source file to find encoding problem or fixmes like
notes
"""
if self.config.notes:
notes = re.compile(
r"#\s*(%s)\b" % "|".join(map(re.escape, self.config.notes)), re.I
)
else:
notes = None
if module.file_encoding:
encoding = module.file_encoding
else:
encoding = "ascii"
with module.stream() as stream:
for lineno, line in enumerate(stream):
line = self._check_encoding(lineno + 1, line, encoding)
if line is not None and notes:
self._check_note(notes, lineno + 1, line, module.tolineno)
def register(linter):
"""required method to auto register this checker"""
linter.register_checker(EncodingChecker(linter))
linter.register_checker(ByIdManagedMessagesChecker(linter))
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