Initial commit

venv/lib/python3.8/site-packages/pylint/utils/__init__.py

@@ -0,0 +1,66 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2006-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
+# Copyright (c) 2009 Vincent
+# Copyright (c) 2009 Mads Kiilerich <mads@kiilerich.com>
+# Copyright (c) 2012-2014 Google, Inc.
+# Copyright (c) 2014-2018 Claudiu Popa <pcmanticore@gmail.com>
+# Copyright (c) 2014-2015 Michal Nowikowski <godfryd@gmail.com>
+# Copyright (c) 2014 LCD 47 <lcd047@gmail.com>
+# Copyright (c) 2014 Brett Cannon <brett@python.org>
+# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
+# Copyright (c) 2014 Damien Nozay <damien.nozay@gmail.com>
+# Copyright (c) 2015 Aru Sahni <arusahni@gmail.com>
+# Copyright (c) 2015 Florian Bruhin <me@the-compiler.org>
+# Copyright (c) 2015 Simu Toni <simutoni@gmail.com>
+# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
+# Copyright (c) 2016 Łukasz Rogalski <rogalski.91@gmail.com>
+# Copyright (c) 2016 Moises Lopez <moylop260@vauxoo.com>
+# Copyright (c) 2016 Glenn Matthews <glenn@e-dad.net>
+# Copyright (c) 2016 Glenn Matthews <glmatthe@cisco.com>
+# Copyright (c) 2016 Ashley Whetter <ashley@awhetter.co.uk>
+# Copyright (c) 2016 xmo-odoo <xmo-odoo@users.noreply.github.com>
+# Copyright (c) 2017, 2020 Anthony Sottile <asottile@umich.edu>
+# Copyright (c) 2017 Pierre Sassoulas <pierre.sassoulas@cea.fr>
+# Copyright (c) 2017-2018 Bryce Guinta <bryce.paul.guinta@gmail.com>
+# Copyright (c) 2017-2018 hippo91 <guillaume.peillex@gmail.com>
+# Copyright (c) 2017 Chris Lamb <chris@chris-lamb.co.uk>
+# Copyright (c) 2017 Thomas Hisch <t.hisch@gmail.com>
+# Copyright (c) 2017 Mikhail Fesenko <proggga@gmail.com>
+# Copyright (c) 2017 Craig Citro <craigcitro@gmail.com>
+# Copyright (c) 2017 Ville Skyttä <ville.skytta@iki.fi>
+# Copyright (c) 2018-2019 Pierre Sassoulas <pierre.sassoulas@gmail.com>
+# Copyright (c) 2018 Pierre Sassoulas <pierre.sassoulas@wisebim.fr>
+# Copyright (c) 2018 ssolanki <sushobhitsolanki@gmail.com>
+# Copyright (c) 2018 Bryce Guinta <bryce.guinta@protonmail.com>
+# Copyright (c) 2018 Sushobhit <31987769+sushobhit27@users.noreply.github.com>
+# Copyright (c) 2018 Reverb C <reverbc@users.noreply.github.com>
+# Copyright (c) 2018 Nick Drozd <nicholasdrozd@gmail.com>
+
+# 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
+
+"""some various utilities and helper classes, most of them used in the
+main pylint class
+"""
+
+from pylint.utils.ast_walker import ASTWalker
+from pylint.utils.file_state import FileState
+from pylint.utils.utils import (
+    _basename_in_blacklist_re,
+    _check_csv,
+    _format_option_value,
+    _splitstrip,
+    _unquote,
+    decoding_stream,
+    deprecated_option,
+    expand_modules,
+    format_section,
+    get_global_option,
+    get_module_and_frameid,
+    get_rst_section,
+    get_rst_title,
+    normalize_text,
+    register_plugins,
+    safe_decode,
+    tokenize_module,
+)

venv/lib/python3.8/site-packages/pylint/utils/ast_walker.py

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+# 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
+
+import collections
+
+from astroid import nodes
+
+
+class ASTWalker:
+    def __init__(self, linter):
+        # callbacks per node types
+        self.nbstatements = 0
+        self.visit_events = collections.defaultdict(list)
+        self.leave_events = collections.defaultdict(list)
+        self.linter = linter
+
+    def _is_method_enabled(self, method):
+        if not hasattr(method, "checks_msgs"):
+            return True
+        for msg_desc in method.checks_msgs:
+            if self.linter.is_message_enabled(msg_desc):
+                return True
+        return False
+
+    def add_checker(self, checker):
+        """walk to the checker's dir and collect visit and leave methods"""
+        vcids = set()
+        lcids = set()
+        visits = self.visit_events
+        leaves = self.leave_events
+        for member in dir(checker):
+            cid = member[6:]
+            if cid == "default":
+                continue
+            if member.startswith("visit_"):
+                v_meth = getattr(checker, member)
+                # don't use visit_methods with no activated message:
+                if self._is_method_enabled(v_meth):
+                    visits[cid].append(v_meth)
+                    vcids.add(cid)
+            elif member.startswith("leave_"):
+                l_meth = getattr(checker, member)
+                # don't use leave_methods with no activated message:
+                if self._is_method_enabled(l_meth):
+                    leaves[cid].append(l_meth)
+                    lcids.add(cid)
+        visit_default = getattr(checker, "visit_default", None)
+        if visit_default:
+            for cls in nodes.ALL_NODE_CLASSES:
+                cid = cls.__name__.lower()
+                if cid not in vcids:
+                    visits[cid].append(visit_default)
+        # for now we have no "leave_default" method in Pylint
+
+    def walk(self, astroid):
+        """call visit events of astroid checkers for the given node, recurse on
+        its children, then leave events.
+        """
+        cid = astroid.__class__.__name__.lower()
+
+        # Detect if the node is a new name for a deprecated alias.
+        # In this case, favour the methods for the deprecated
+        # alias if any,  in order to maintain backwards
+        # compatibility.
+        visit_events = self.visit_events.get(cid, ())
+        leave_events = self.leave_events.get(cid, ())
+
+        if astroid.is_statement:
+            self.nbstatements += 1
+        # generate events for this node on each checker
+        for callback in visit_events or ():
+            callback(astroid)
+        # recurse on children
+        for child in astroid.get_children():
+            self.walk(child)
+        for callback in leave_events or ():
+            callback(astroid)

venv/lib/python3.8/site-packages/pylint/utils/file_state.py

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+# 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
+
+import collections
+
+from astroid import nodes
+
+from pylint.constants import MSG_STATE_SCOPE_MODULE, WarningScope
+
+
+class FileState:
+    """Hold internal state specific to the currently analyzed file"""
+
+    def __init__(self, modname=None):
+        self.base_name = modname
+        self._module_msgs_state = {}
+        self._raw_module_msgs_state = {}
+        self._ignored_msgs = collections.defaultdict(set)
+        self._suppression_mapping = {}
+        self._effective_max_line_number = None
+
+    def collect_block_lines(self, msgs_store, module_node):
+        """Walk the AST to collect block level options line numbers."""
+        for msg, lines in self._module_msgs_state.items():
+            self._raw_module_msgs_state[msg] = lines.copy()
+        orig_state = self._module_msgs_state.copy()
+        self._module_msgs_state = {}
+        self._suppression_mapping = {}
+        self._effective_max_line_number = module_node.tolineno
+        self._collect_block_lines(msgs_store, module_node, orig_state)
+
+    def _collect_block_lines(self, msgs_store, node, msg_state):
+        """Recursively walk (depth first) AST to collect block level options
+        line numbers.
+        """
+        for child in node.get_children():
+            self._collect_block_lines(msgs_store, child, msg_state)
+        first = node.fromlineno
+        last = node.tolineno
+        # first child line number used to distinguish between disable
+        # which are the first child of scoped node with those defined later.
+        # For instance in the code below:
+        #
+        # 1.   def meth8(self):
+        # 2.        """test late disabling"""
+        # 3.        pylint: disable=not-callable
+        # 4.        print(self.blip)
+        # 5.        pylint: disable=no-member
+        # 6.        print(self.bla)
+        #
+        # E1102 should be disabled from line 1 to 6 while E1101 from line 5 to 6
+        #
+        # this is necessary to disable locally messages applying to class /
+        # function using their fromlineno
+        if (
+            isinstance(node, (nodes.Module, nodes.ClassDef, nodes.FunctionDef))
+            and node.body
+        ):
+            firstchildlineno = node.body[0].fromlineno
+        else:
+            firstchildlineno = last
+        for msgid, lines in msg_state.items():
+            for lineno, state in list(lines.items()):
+                original_lineno = lineno
+                if first > lineno or last < lineno:
+                    continue
+                # Set state for all lines for this block, if the
+                # warning is applied to nodes.
+                message_definitions = msgs_store.get_message_definitions(msgid)
+                for message_definition in message_definitions:
+                    if message_definition.scope == WarningScope.NODE:
+                        if lineno > firstchildlineno:
+                            state = True
+                        first_, last_ = node.block_range(lineno)
+                    else:
+                        first_ = lineno
+                        last_ = last
+                for line in range(first_, last_ + 1):
+                    # do not override existing entries
+                    if line in self._module_msgs_state.get(msgid, ()):
+                        continue
+                    if line in lines:  # state change in the same block
+                        state = lines[line]
+                        original_lineno = line
+                    if not state:
+                        self._suppression_mapping[(msgid, line)] = original_lineno
+                    try:
+                        self._module_msgs_state[msgid][line] = state
+                    except KeyError:
+                        self._module_msgs_state[msgid] = {line: state}
+                del lines[lineno]
+
+    def set_msg_status(self, msg, line, status):
+        """Set status (enabled/disable) for a given message at a given line"""
+        assert line > 0
+        try:
+            self._module_msgs_state[msg.msgid][line] = status
+        except KeyError:
+            self._module_msgs_state[msg.msgid] = {line: status}
+
+    def handle_ignored_message(
+        self, state_scope, msgid, line, node, args, confidence
+    ):  # pylint: disable=unused-argument
+        """Report an ignored message.
+
+        state_scope is either MSG_STATE_SCOPE_MODULE or MSG_STATE_SCOPE_CONFIG,
+        depending on whether the message was disabled locally in the module,
+        or globally. The other arguments are the same as for add_message.
+        """
+        if state_scope == MSG_STATE_SCOPE_MODULE:
+            try:
+                orig_line = self._suppression_mapping[(msgid, line)]
+                self._ignored_msgs[(msgid, orig_line)].add(line)
+            except KeyError:
+                pass
+
+    def iter_spurious_suppression_messages(self, msgs_store):
+        for warning, lines in self._raw_module_msgs_state.items():
+            for line, enable in lines.items():
+                if not enable and (warning, line) not in self._ignored_msgs:
+                    # ignore cyclic-import check which can show false positives
+                    # here due to incomplete context
+                    if warning != "R0401":
+                        yield "useless-suppression", line, (
+                            msgs_store.get_msg_display_string(warning),
+                        )
+        # don't use iteritems here, _ignored_msgs may be modified by add_message
+        for (warning, from_), lines in list(self._ignored_msgs.items()):
+            for line in lines:
+                yield "suppressed-message", line, (
+                    msgs_store.get_msg_display_string(warning),
+                    from_,
+                )
+
+    def get_effective_max_line_number(self):
+        return self._effective_max_line_number

venv/lib/python3.8/site-packages/pylint/utils/pragma_parser.py

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+# 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
+
+import re
+from collections import namedtuple
+from typing import Generator, List
+
+# Allow stopping after the first semicolon/hash encountered,
+# so that an option can be continued with the reasons
+# why it is active or disabled.
+OPTION_RGX = r"""
+    \s*                # Any number of whithespace
+    \#?                # One or zero hash
+    .*                 # Anything (as much as possible)
+    (\s*               # Beginning of first matched group and any number of whitespaces
+    \#                 # Beginning of comment
+    .*?                # Anything (as little as possible)
+    \bpylint:          # pylint word and column
+    \s*                # Any number of whitespaces
+    ([^;#\n]+))        # Anything except semicolon or hash or newline (it is the second matched group) 
+                       # and end of the first matched group
+    [;#]{0,1}"""  # From 0 to 1 repetition of semicolon or hash
+OPTION_PO = re.compile(OPTION_RGX, re.VERBOSE)
+
+
+PragmaRepresenter = namedtuple("PragmaRepresenter", "action messages")
+
+
+ATOMIC_KEYWORDS = frozenset(("disable-all", "skip-file"))
+MESSAGE_KEYWORDS = frozenset(("disable-msg", "enable-msg", "disable", "enable"))
+# sorted is necessary because sets are unordered collections and ALL_KEYWORDS
+#  string should not vary between executions
+#  reverse is necessary in order to have the longest keywords first, so that, for example,
+# 'disable' string should not be matched instead of 'disable-all'
+ALL_KEYWORDS = "|".join(
+    sorted(ATOMIC_KEYWORDS | MESSAGE_KEYWORDS, key=len, reverse=True)
+)
+
+
+TOKEN_SPECIFICATION = [
+    ("KEYWORD", r"\b({:s})\b".format(ALL_KEYWORDS)),
+    ("MESSAGE_STRING", r"[A-Za-z\-]{2,}"),  #  Identifiers
+    ("ASSIGN", r"="),  #  Assignment operator
+    ("MESSAGE_NUMBER", r"[CREIWF]{1}\d*"),
+]
+
+TOK_REGEX = "|".join(
+    "(?P<{:s}>{:s})".format(token_name, token_rgx)
+    for token_name, token_rgx in TOKEN_SPECIFICATION
+)
+
+
+def emit_pragma_representer(action, messages):
+    if not messages and action in MESSAGE_KEYWORDS:
+        raise InvalidPragmaError(
+            "The keyword is not followed by message identifier", action
+        )
+    return PragmaRepresenter(action, messages)
+
+
+class PragmaParserError(Exception):
+    """
+    A class for exceptions thrown by pragma_parser module
+    """
+
+    def __init__(self, message, token):
+        """
+        :args message: explain the reason why the exception has been thrown
+        :args token: token concerned by the exception
+        """
+        self.message = message
+        self.token = token
+        super().__init__(self.message)
+
+
+class UnRecognizedOptionError(PragmaParserError):
+    """
+    Thrown in case the of a valid but unrecognized option
+    """
+
+
+class InvalidPragmaError(PragmaParserError):
+    """
+    Thrown in case the pragma is invalid
+    """
+
+
+def parse_pragma(pylint_pragma: str) -> Generator[PragmaRepresenter, None, None]:
+    action = None
+    messages = []  # type: List[str]
+    assignment_required = False
+    previous_token = ""
+
+    for mo in re.finditer(TOK_REGEX, pylint_pragma):
+        kind = mo.lastgroup
+        value = mo.group()
+
+        if kind == "ASSIGN":
+            if not assignment_required:
+                if action:
+                    # A keyword has been found previously but doesn't support assignement
+                    raise UnRecognizedOptionError(
+                        "The keyword doesn't support assignment", action
+                    )
+                if previous_token:
+                    #  Something found previously but not a known keyword
+                    raise UnRecognizedOptionError(
+                        "The keyword is unknown", previous_token
+                    )
+                # Nothing at all detected before this assignment
+                raise InvalidPragmaError("Missing keyword before assignment", "")
+            assignment_required = False
+        elif assignment_required:
+            raise InvalidPragmaError("The = sign is missing after the keyword", action)
+        elif kind == "KEYWORD":
+            if action:
+                yield emit_pragma_representer(action, messages)
+            action = value
+            messages = list()
+            assignment_required = action in MESSAGE_KEYWORDS
+        elif kind in ("MESSAGE_STRING", "MESSAGE_NUMBER"):
+            messages.append(value)
+            assignment_required = False
+        else:
+            raise RuntimeError("Token not recognized")
+
+        previous_token = value
+
+    if action:
+        yield emit_pragma_representer(action, messages)
+    else:
+        raise UnRecognizedOptionError("The keyword is unknown", previous_token)

venv/lib/python3.8/site-packages/pylint/utils/utils.py

@@ -0,0 +1,399 @@
+# 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
+
+import codecs
+import os
+import re
+import sys
+import textwrap
+import tokenize
+
+from astroid import Module, modutils
+
+from pylint.constants import PY_EXTS
+
+DEFAULT_LINE_LENGTH = 79
+
+
+def normalize_text(text, line_len=DEFAULT_LINE_LENGTH, indent=""):
+    """Wrap the text on the given line length."""
+    return "\n".join(
+        textwrap.wrap(
+            text, width=line_len, initial_indent=indent, subsequent_indent=indent
+        )
+    )
+
+
+def get_module_and_frameid(node):
+    """return the module name and the frame id in the module"""
+    frame = node.frame()
+    module, obj = "", []
+    while frame:
+        if isinstance(frame, Module):
+            module = frame.name
+        else:
+            obj.append(getattr(frame, "name", "<lambda>"))
+        try:
+            frame = frame.parent.frame()
+        except AttributeError:
+            frame = None
+    obj.reverse()
+    return module, ".".join(obj)
+
+
+def get_rst_title(title, character):
+    """Permit to get a title formatted as ReStructuredText test (underlined with a chosen character)."""
+    return "%s\n%s\n" % (title, character * len(title))
+
+
+def get_rst_section(section, options, doc=None):
+    """format an options section using as a ReStructuredText formatted output"""
+    result = ""
+    if section:
+        result += get_rst_title(section, "'")
+    if doc:
+        formatted_doc = normalize_text(doc)
+        result += "%s\n\n" % formatted_doc
+    for optname, optdict, value in options:
+        help_opt = optdict.get("help")
+        result += ":%s:\n" % optname
+        if help_opt:
+            formatted_help = normalize_text(help_opt, indent="  ")
+            result += "%s\n" % formatted_help
+        if value:
+            value = str(_format_option_value(optdict, value))
+            result += "\n  Default: ``%s``\n" % value.replace("`` ", "```` ``")
+    return result
+
+
+def safe_decode(line, encoding, *args, **kwargs):
+    """return decoded line from encoding or decode with default encoding"""
+    try:
+        return line.decode(encoding or sys.getdefaultencoding(), *args, **kwargs)
+    except LookupError:
+        return line.decode(sys.getdefaultencoding(), *args, **kwargs)
+
+
+def decoding_stream(stream, encoding, errors="strict"):
+    try:
+        reader_cls = codecs.getreader(encoding or sys.getdefaultencoding())
+    except LookupError:
+        reader_cls = codecs.getreader(sys.getdefaultencoding())
+    return reader_cls(stream, errors)
+
+
+def tokenize_module(module):
+    with module.stream() as stream:
+        readline = stream.readline
+        return list(tokenize.tokenize(readline))
+
+
+def _basename_in_blacklist_re(base_name, black_list_re):
+    """Determines if the basename is matched in a regex blacklist
+
+    :param str base_name: The basename of the file
+    :param list black_list_re: A collection of regex patterns to match against.
+        Successful matches are blacklisted.
+
+    :returns: `True` if the basename is blacklisted, `False` otherwise.
+    :rtype: bool
+    """
+    for file_pattern in black_list_re:
+        if file_pattern.match(base_name):
+            return True
+    return False
+
+
+def _modpath_from_file(filename, is_namespace):
+    def _is_package_cb(path, parts):
+        return modutils.check_modpath_has_init(path, parts) or is_namespace
+
+    return modutils.modpath_from_file_with_callback(
+        filename, is_package_cb=_is_package_cb
+    )
+
+
+def get_python_path(filepath):
+    dirname = os.path.realpath(os.path.expanduser(filepath))
+    if not os.path.isdir(dirname):
+        dirname = os.path.dirname(dirname)
+    while True:
+        if not os.path.exists(os.path.join(dirname, "__init__.py")):
+            return dirname
+        old_dirname = dirname
+        dirname = os.path.dirname(dirname)
+        if old_dirname == dirname:
+            return os.getcwd()
+    return None
+
+
+def expand_modules(files_or_modules, black_list, black_list_re):
+    """take a list of files/modules/packages and return the list of tuple
+    (file, module name) which have to be actually checked
+    """
+    result = []
+    errors = []
+    path = sys.path.copy()
+
+    for something in files_or_modules:
+        if os.path.basename(something) in black_list:
+            continue
+        if _basename_in_blacklist_re(os.path.basename(something), black_list_re):
+            continue
+
+        module_path = get_python_path(something)
+        additional_search_path = [module_path] + path
+        if os.path.exists(something):
+            # this is a file or a directory
+            try:
+                modname = ".".join(
+                    modutils.modpath_from_file(something, path=additional_search_path)
+                )
+            except ImportError:
+                modname = os.path.splitext(os.path.basename(something))[0]
+            if os.path.isdir(something):
+                filepath = os.path.join(something, "__init__.py")
+            else:
+                filepath = something
+        else:
+            # suppose it's a module or package
+            modname = something
+            try:
+                filepath = modutils.file_from_modpath(
+                    modname.split("."), path=additional_search_path
+                )
+                if filepath is None:
+                    continue
+            except (ImportError, SyntaxError) as ex:
+                # The SyntaxError is a Python bug and should be
+                # removed once we move away from imp.find_module: http://bugs.python.org/issue10588
+                errors.append({"key": "fatal", "mod": modname, "ex": ex})
+                continue
+
+        filepath = os.path.normpath(filepath)
+        modparts = (modname or something).split(".")
+
+        try:
+            spec = modutils.file_info_from_modpath(
+                modparts, path=additional_search_path
+            )
+        except ImportError:
+            # Might not be acceptable, don't crash.
+            is_namespace = False
+            is_directory = os.path.isdir(something)
+        else:
+            is_namespace = modutils.is_namespace(spec)
+            is_directory = modutils.is_directory(spec)
+
+        if not is_namespace:
+            result.append(
+                {
+                    "path": filepath,
+                    "name": modname,
+                    "isarg": True,
+                    "basepath": filepath,
+                    "basename": modname,
+                }
+            )
+
+        has_init = (
+            not (modname.endswith(".__init__") or modname == "__init__")
+            and os.path.basename(filepath) == "__init__.py"
+        )
+
+        if has_init or is_namespace or is_directory:
+            for subfilepath in modutils.get_module_files(
+                os.path.dirname(filepath), black_list, list_all=is_namespace
+            ):
+                if filepath == subfilepath:
+                    continue
+                if _basename_in_blacklist_re(
+                    os.path.basename(subfilepath), black_list_re
+                ):
+                    continue
+
+                modpath = _modpath_from_file(subfilepath, is_namespace)
+                submodname = ".".join(modpath)
+                result.append(
+                    {
+                        "path": subfilepath,
+                        "name": submodname,
+                        "isarg": False,
+                        "basepath": filepath,
+                        "basename": modname,
+                    }
+                )
+    return result, errors
+
+
+def register_plugins(linter, directory):
+    """load all module and package in the given directory, looking for a
+    'register' function in each one, used to register pylint checkers
+    """
+    imported = {}
+    for filename in os.listdir(directory):
+        base, extension = os.path.splitext(filename)
+        if base in imported or base == "__pycache__":
+            continue
+        if (
+            extension in PY_EXTS
+            and base != "__init__"
+            or (not extension and os.path.isdir(os.path.join(directory, base)))
+        ):
+            try:
+                module = modutils.load_module_from_file(
+                    os.path.join(directory, filename)
+                )
+            except ValueError:
+                # empty module name (usually emacs auto-save files)
+                continue
+            except ImportError as exc:
+                print(
+                    "Problem importing module %s: %s" % (filename, exc), file=sys.stderr
+                )
+            else:
+                if hasattr(module, "register"):
+                    module.register(linter)
+                    imported[base] = 1
+
+
+def get_global_option(checker, option, default=None):
+    """ Retrieve an option defined by the given *checker* or
+    by all known option providers.
+
+    It will look in the list of all options providers
+    until the given *option* will be found.
+    If the option wasn't found, the *default* value will be returned.
+    """
+    # First, try in the given checker's config.
+    # After that, look in the options providers.
+
+    try:
+        return getattr(checker.config, option.replace("-", "_"))
+    except AttributeError:
+        pass
+    for provider in checker.linter.options_providers:
+        for options in provider.options:
+            if options[0] == option:
+                return getattr(provider.config, option.replace("-", "_"))
+    return default
+
+
+def deprecated_option(
+    shortname=None, opt_type=None, help_msg=None, deprecation_msg=None
+):
+    def _warn_deprecated(option, optname, *args):  # pylint: disable=unused-argument
+        if deprecation_msg:
+            sys.stderr.write(deprecation_msg % (optname,))
+
+    option = {
+        "help": help_msg,
+        "hide": True,
+        "type": opt_type,
+        "action": "callback",
+        "callback": _warn_deprecated,
+        "deprecated": True,
+    }
+    if shortname:
+        option["shortname"] = shortname
+    return option
+
+
+def _splitstrip(string, sep=","):
+    """return a list of stripped string by splitting the string given as
+    argument on `sep` (',' by default). Empty string are discarded.
+
+    >>> _splitstrip('a, b, c   ,  4,,')
+    ['a', 'b', 'c', '4']
+    >>> _splitstrip('a')
+    ['a']
+    >>> _splitstrip('a,\nb,\nc,')
+    ['a', 'b', 'c']
+
+    :type string: str or unicode
+    :param string: a csv line
+
+    :type sep: str or unicode
+    :param sep: field separator, default to the comma (',')
+
+    :rtype: str or unicode
+    :return: the unquoted string (or the input string if it wasn't quoted)
+    """
+    return [word.strip() for word in string.split(sep) if word.strip()]
+
+
+def _unquote(string):
+    """remove optional quotes (simple or double) from the string
+
+    :type string: str or unicode
+    :param string: an optionally quoted string
+
+    :rtype: str or unicode
+    :return: the unquoted string (or the input string if it wasn't quoted)
+    """
+    if not string:
+        return string
+    if string[0] in "\"'":
+        string = string[1:]
+    if string[-1] in "\"'":
+        string = string[:-1]
+    return string
+
+
+def _check_csv(value):
+    if isinstance(value, (list, tuple)):
+        return value
+    return _splitstrip(value)
+
+
+def _comment(string):
+    """return string as a comment"""
+    lines = [line.strip() for line in string.splitlines()]
+    return "# " + ("%s# " % os.linesep).join(lines)
+
+
+def _format_option_value(optdict, value):
+    """return the user input's value from a 'compiled' value"""
+    if isinstance(value, (list, tuple)):
+        value = ",".join(_format_option_value(optdict, item) for item in value)
+    elif isinstance(value, dict):
+        value = ",".join("%s:%s" % (k, v) for k, v in value.items())
+    elif hasattr(value, "match"):  # optdict.get('type') == 'regexp'
+        # compiled regexp
+        value = value.pattern
+    elif optdict.get("type") == "yn":
+        value = "yes" if value else "no"
+    elif isinstance(value, str) and value.isspace():
+        value = "'%s'" % value
+    return value
+
+
+def format_section(stream, section, options, doc=None):
+    """format an options section using the INI format"""
+    if doc:
+        print(_comment(doc), file=stream)
+    print("[%s]" % section, file=stream)
+    _ini_format(stream, options)
+
+
+def _ini_format(stream, options):
+    """format options using the INI format"""
+    for optname, optdict, value in options:
+        value = _format_option_value(optdict, value)
+        help_opt = optdict.get("help")
+        if help_opt:
+            help_opt = normalize_text(help_opt, indent="# ")
+            print(file=stream)
+            print(help_opt, file=stream)
+        else:
+            print(file=stream)
+        if value is None:
+            print("#%s=" % optname, file=stream)
+        else:
+            value = str(value).strip()
+            if re.match(r"^([\w-]+,)+[\w-]+$", str(value)):
+                separator = "\n " + " " * len(optname)
+                value = separator.join(x + "," for x in str(value).split(","))
+                # remove trailing ',' from last element of the list
+                value = value[:-1]
+            print("%s=%s" % (optname, value), file=stream)