Move all package files to a pylint package.

1 files changed, 0 insertions, 919 deletions

diff --git a/utils.py b/utils.py
deleted file mode 100644
index 6685c4a..0000000
--- a/utils.py
+++ /dev/null
@@ -1,919 +0,0 @@
-# Copyright (c) 2003-2014 LOGILAB S.A. (Paris, FRANCE).
-# http://www.logilab.fr/ -- mailto:contact@logilab.fr
-#
-# This program is free software; you can redistribute it and/or modify it under
-# the terms of the GNU General Public License as published by the Free Software
-# Foundation; either version 2 of the License, or (at your option) any later
-# version.
-#
-# This program is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details
-#
-# You should have received a copy of the GNU General Public License along with
-# this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-"""some various utilities and helper classes, most of them used in the
-main pylint class
-"""
-from __future__ import print_function
-
-import collections
-import os
-import re
-import sys
-import tokenize
-import warnings
-from os.path import dirname, basename, splitext, exists, isdir, join, normpath
-
-import six
-from six.moves import zip  # pylint: disable=redefined-builtin
-
-from logilab.common.interface import implements
-from logilab.common.textutils import normalize_text
-from logilab.common.configuration import rest_format_section
-from logilab.common.ureports import Section
-
-from astroid import nodes, Module
-from astroid.modutils import modpath_from_file, get_module_files, \
-    file_from_modpath, load_module_from_file
-
-from pylint.interfaces import IRawChecker, ITokenChecker, UNDEFINED
-
-
-class UnknownMessage(Exception):
-    """raised when a unregistered message id is encountered"""
-
-class EmptyReport(Exception):
-    """raised when a report is empty and so should not be displayed"""
-
-
-MSG_TYPES = {
-    'I' : 'info',
-    'C' : 'convention',
-    'R' : 'refactor',
-    'W' : 'warning',
-    'E' : 'error',
-    'F' : 'fatal'
-    }
-MSG_TYPES_LONG = {v: k for k, v in six.iteritems(MSG_TYPES)}
-
-MSG_TYPES_STATUS = {
-    'I' : 0,
-    'C' : 16,
-    'R' : 8,
-    'W' : 4,
-    'E' : 2,
-    'F' : 1
-    }
-
-_MSG_ORDER = 'EWRCIF'
-MSG_STATE_SCOPE_CONFIG = 0
-MSG_STATE_SCOPE_MODULE = 1
-MSG_STATE_CONFIDENCE = 2
-
-OPTION_RGX = re.compile(r'\s*#.*\bpylint:(.*)')
-
-# The line/node distinction does not apply to fatal errors and reports.
-_SCOPE_EXEMPT = 'FR'
-
-class WarningScope(object):
-    LINE = 'line-based-msg'
-    NODE = 'node-based-msg'
-
-_MsgBase = collections.namedtuple(
-    '_MsgBase',
-    ['msg_id', 'symbol', 'msg', 'C', 'category', 'confidence',
-     'abspath', 'path', 'module', 'obj', 'line', 'column'])
-
-
-class Message(_MsgBase):
-    """This class represent a message to be issued by the reporters"""
-    def __new__(cls, msg_id, symbol, location, msg, confidence):
-        return _MsgBase.__new__(
-            cls, msg_id, symbol, msg, msg_id[0], MSG_TYPES[msg_id[0]],
-            confidence, *location)
-
-    def format(self, template):
-        """Format the message according to the given template.
-
-        The template format is the one of the format method :
-        cf. http://docs.python.org/2/library/string.html#formatstrings
-        """
-        # For some reason, _asdict on derived namedtuples does not work with
-        # Python 3.4. Needs some investigation.
-        return template.format(**dict(zip(self._fields, self)))
-
-
-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 category_id(cid):
-    cid = cid.upper()
-    if cid in MSG_TYPES:
-        return cid
-    return MSG_TYPES_LONG.get(cid)
-
-
-def _decoding_readline(stream, module):
-    return lambda: stream.readline().decode(module.file_encoding,
-                                           'replace')
-
-
-def tokenize_module(module):
-    with module.stream() as stream:
-        readline = stream.readline
-        if sys.version_info < (3, 0):
-            if module.file_encoding is not None:
-                readline = _decoding_readline(stream, module)
-            return list(tokenize.generate_tokens(readline))
-        return list(tokenize.tokenize(readline))
-
-def build_message_def(checker, msgid, msg_tuple):
-    if implements(checker, (IRawChecker, ITokenChecker)):
-        default_scope = WarningScope.LINE
-    else:
-        default_scope = WarningScope.NODE
-    options = {}
-    if len(msg_tuple) > 3:
-        (msg, symbol, descr, options) = msg_tuple
-    elif len(msg_tuple) > 2:
-        (msg, symbol, descr) = msg_tuple[:3]
-    else:
-        # messages should have a symbol, but for backward compatibility
-        # they may not.
-        (msg, descr) = msg_tuple
-        warnings.warn("[pylint 0.26] description of message %s doesn't include "
-                      "a symbolic name" % msgid, DeprecationWarning)
-        symbol = None
-    options.setdefault('scope', default_scope)
-    return MessageDefinition(checker, msgid, msg, descr, symbol, **options)
-
-
-class MessageDefinition(object):
-    def __init__(self, checker, msgid, msg, descr, symbol, scope,
-                 minversion=None, maxversion=None, old_names=None):
-        self.checker = checker
-        assert len(msgid) == 5, 'Invalid message id %s' % msgid
-        assert msgid[0] in MSG_TYPES, \
-               'Bad message type %s in %r' % (msgid[0], msgid)
-        self.msgid = msgid
-        self.msg = msg
-        self.descr = descr
-        self.symbol = symbol
-        self.scope = scope
-        self.minversion = minversion
-        self.maxversion = maxversion
-        self.old_names = old_names or []
-
-    def may_be_emitted(self):
-        """return True if message may be emitted using the current interpreter"""
-        if self.minversion is not None and self.minversion > sys.version_info:
-            return False
-        if self.maxversion is not None and self.maxversion <= sys.version_info:
-            return False
-        return True
-
-    def format_help(self, checkerref=False):
-        """return the help string for the given message id"""
-        desc = self.descr
-        if checkerref:
-            desc += ' This message belongs to the %s checker.' % \
-                   self.checker.name
-        title = self.msg
-        if self.symbol:
-            msgid = '%s (%s)' % (self.symbol, self.msgid)
-        else:
-            msgid = self.msgid
-        if self.minversion or self.maxversion:
-            restr = []
-            if self.minversion:
-                restr.append('< %s' % '.'.join([str(n) for n in self.minversion]))
-            if self.maxversion:
-                restr.append('>= %s' % '.'.join([str(n) for n in self.maxversion]))
-            restr = ' or '.join(restr)
-            if checkerref:
-                desc += " It can't be emitted when using Python %s." % restr
-            else:
-                desc += " This message can't be emitted when using Python %s." % restr
-        desc = normalize_text(' '.join(desc.split()), indent='  ')
-        if title != '%s':
-            title = title.splitlines()[0]
-            return ':%s: *%s*\n%s' % (msgid, title, desc)
-        return ':%s:\n%s' % (msgid, desc)
-
-
-class MessagesHandlerMixIn(object):
-    """a mix-in class containing all the messages related methods for the main
-    lint class
-    """
-
-    def __init__(self):
-        self._msgs_state = {}
-        self.msg_status = 0
-
-    def disable(self, msgid, scope='package', line=None, ignore_unknown=False):
-        """don't output message of the given id"""
-        assert scope in ('package', 'module')
-        # handle disable=all by disabling all categories
-        if msgid == 'all':
-            for msgid in MSG_TYPES:
-                self.disable(msgid, scope, line)
-            return
-        # msgid is a category?
-        catid = category_id(msgid)
-        if catid is not None:
-            for _msgid in self.msgs_store._msgs_by_category.get(catid):
-                self.disable(_msgid, scope, line)
-            return
-        # msgid is a checker name?
-        if msgid.lower() in self._checkers:
-            msgs_store = self.msgs_store
-            for checker in self._checkers[msgid.lower()]:
-                for _msgid in checker.msgs:
-                    if _msgid in msgs_store._alternative_names:
-                        self.disable(_msgid, scope, line)
-            return
-        # msgid is report id?
-        if msgid.lower().startswith('rp'):
-            self.disable_report(msgid)
-            return
-
-        try:
-            # msgid is a symbolic or numeric msgid.
-            msg = self.msgs_store.check_message_id(msgid)
-        except UnknownMessage:
-            if ignore_unknown:
-                return
-            raise
-
-        if scope == 'module':
-            self.file_state.set_msg_status(msg, line, False)
-            if msg.symbol != 'locally-disabled':
-                self.add_message('locally-disabled', line=line,
-                                 args=(msg.symbol, msg.msgid))
-
-        else:
-            msgs = self._msgs_state
-            msgs[msg.msgid] = False
-            # sync configuration object
-            self.config.disable = [mid for mid, val in six.iteritems(msgs)
-                                   if not val]
-
-    def enable(self, msgid, scope='package', line=None, ignore_unknown=False):
-        """reenable message of the given id"""
-        assert scope in ('package', 'module')
-        catid = category_id(msgid)
-        # msgid is a category?
-        if catid is not None:
-            for msgid in self.msgs_store._msgs_by_category.get(catid):
-                self.enable(msgid, scope, line)
-            return
-        # msgid is a checker name?
-        if msgid.lower() in self._checkers:
-            for checker in self._checkers[msgid.lower()]:
-                for msgid_ in checker.msgs:
-                    self.enable(msgid_, scope, line)
-            return
-        # msgid is report id?
-        if msgid.lower().startswith('rp'):
-            self.enable_report(msgid)
-            return
-
-        try:
-            # msgid is a symbolic or numeric msgid.
-            msg = self.msgs_store.check_message_id(msgid)
-        except UnknownMessage:
-            if ignore_unknown:
-                return
-            raise
-
-        if scope == 'module':
-            self.file_state.set_msg_status(msg, line, True)
-            self.add_message('locally-enabled', line=line, args=(msg.symbol, msg.msgid))
-        else:
-            msgs = self._msgs_state
-            msgs[msg.msgid] = True
-            # sync configuration object
-            self.config.enable = [mid for mid, val in six.iteritems(msgs) if val]
-
-    def get_message_state_scope(self, msgid, line=None, confidence=UNDEFINED):
-        """Returns the scope at which a message was enabled/disabled."""
-        if self.config.confidence and confidence.name not in self.config.confidence:
-            return MSG_STATE_CONFIDENCE
-        try:
-            if line in self.file_state._module_msgs_state[msgid]:
-                return MSG_STATE_SCOPE_MODULE
-        except (KeyError, TypeError):
-            return MSG_STATE_SCOPE_CONFIG
-
-    def is_message_enabled(self, msg_descr, line=None, confidence=None):
-        """return true if the message associated to the given message id is
-        enabled
-
-        msgid may be either a numeric or symbolic message id.
-        """
-        if self.config.confidence and confidence:
-            if confidence.name not in self.config.confidence:
-                return False
-        try:
-            msgid = self.msgs_store.check_message_id(msg_descr).msgid
-        except UnknownMessage:
-            # The linter checks for messages that are not registered
-            # due to version mismatch, just treat them as message IDs
-            # for now.
-            msgid = msg_descr
-        if line is None:
-            return self._msgs_state.get(msgid, True)
-        try:
-            return self.file_state._module_msgs_state[msgid][line]
-        except KeyError:
-            return self._msgs_state.get(msgid, True)
-
-    def add_message(self, msg_descr, line=None, node=None, args=None, confidence=UNDEFINED):
-        """Adds a message given by ID or name.
-
-        If provided, the message string is expanded using args
-
-        AST checkers should must the node argument (but may optionally
-        provide line if the line number is different), raw and token checkers
-        must provide the line argument.
-        """
-        msg_info = self.msgs_store.check_message_id(msg_descr)
-        msgid = msg_info.msgid
-        # backward compatibility, message may not have a symbol
-        symbol = msg_info.symbol or msgid
-        # Fatal messages and reports are special, the node/scope distinction
-        # does not apply to them.
-        if msgid[0] not in _SCOPE_EXEMPT:
-            if msg_info.scope == WarningScope.LINE:
-                assert node is None and line is not None, (
-                    'Message %s must only provide line, got line=%s, node=%s' % (msgid, line, node))
-            elif msg_info.scope == WarningScope.NODE:
-                # Node-based warnings may provide an override line.
-                assert node is not None, 'Message %s must provide Node, got None'
-
-        if line is None and node is not None:
-            line = node.fromlineno
-        if hasattr(node, 'col_offset'):
-            col_offset = node.col_offset # XXX measured in bytes for utf-8, divide by two for chars?
-        else:
-            col_offset = None
-        # should this message be displayed
-        if not self.is_message_enabled(msgid, line, confidence):
-            self.file_state.handle_ignored_message(
-                self.get_message_state_scope(msgid, line, confidence),
-                msgid, line, node, args, confidence)
-            return
-        # update stats
-        msg_cat = MSG_TYPES[msgid[0]]
-        self.msg_status |= MSG_TYPES_STATUS[msgid[0]]
-        self.stats[msg_cat] += 1
-        self.stats['by_module'][self.current_name][msg_cat] += 1
-        try:
-            self.stats['by_msg'][symbol] += 1
-        except KeyError:
-            self.stats['by_msg'][symbol] = 1
-        # expand message ?
-        msg = msg_info.msg
-        if args:
-            msg %= args
-        # get module and object
-        if node is None:
-            module, obj = self.current_name, ''
-            abspath = self.current_file
-        else:
-            module, obj = get_module_and_frameid(node)
-            abspath = node.root().file
-        path = abspath.replace(self.reporter.path_strip_prefix, '')
-        # add the message
-        self.reporter.handle_message(
-            Message(msgid, symbol,
-                    (abspath, path, module, obj, line or 1, col_offset or 0), msg, confidence))
-
-    def print_full_documentation(self):
-        """output a full documentation in ReST format"""
-        print("Pylint global options and switches")
-        print("----------------------------------")
-        print("")
-        print("Pylint provides global options and switches.")
-        print("")
-
-        by_checker = {}
-        for checker in self.get_checkers():
-            if checker.name == 'master':
-                if checker.options:
-                    for section, options in checker.options_by_section():
-                        if section is None:
-                            title = 'General options'
-                        else:
-                            title = '%s options' % section.capitalize()
-                        print(title)
-                        print('~' * len(title))
-                        rest_format_section(sys.stdout, None, options)
-                        print("")
-            else:
-                try:
-                    by_checker[checker.name][0] += checker.options_and_values()
-                    by_checker[checker.name][1].update(checker.msgs)
-                    by_checker[checker.name][2] += checker.reports
-                except KeyError:
-                    by_checker[checker.name] = [list(checker.options_and_values()),
-                                                dict(checker.msgs),
-                                                list(checker.reports)]
-
-        print("Pylint checkers' options and switches")
-        print("-------------------------------------")
-        print("")
-        print("Pylint checkers can provide three set of features:")
-        print("")
-        print("* options that control their execution,")
-        print("* messages that they can raise,")
-        print("* reports that they can generate.")
-        print("")
-        print("Below is a list of all checkers and their features.")
-        print("")
-
-        for checker, (options, msgs, reports) in six.iteritems(by_checker):
-            title = '%s checker' % (checker.replace("_", " ").title())
-            print(title)
-            print('~' * len(title))
-            print("")
-            print("Verbatim name of the checker is ``%s``." % checker)
-            print("")
-            if options:
-                title = 'Options'
-                print(title)
-                print('^' * len(title))
-                rest_format_section(sys.stdout, None, options)
-                print("")
-            if msgs:
-                title = 'Messages'
-                print(title)
-                print('~' * len(title))
-                for msgid, msg in sorted(six.iteritems(msgs),
-                                         key=lambda kv: (_MSG_ORDER.index(kv[0][0]), kv[1])):
-                    msg = build_message_def(checker, msgid, msg)
-                    print(msg.format_help(checkerref=False))
-                print("")
-            if reports:
-                title = 'Reports'
-                print(title)
-                print('~' * len(title))
-                for report in reports:
-                    print(':%s: %s' % report[:2])
-                print("")
-            print("")
-
-
-class FileState(object):
-    """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 = {}
-
-    def collect_block_lines(self, msgs_store, module_node):
-        """Walk the AST to collect block level options line numbers."""
-        for msg, lines in six.iteritems(self._module_msgs_state):
-            self._raw_module_msgs_state[msg] = lines.copy()
-        orig_state = self._module_msgs_state.copy()
-        self._module_msgs_state = {}
-        self._suppression_mapping = {}
-        self._collect_block_lines(msgs_store, module_node, orig_state)
-
-    def _collect_block_lines(self, msgs_store, node, msg_state):
-        """Recursivly 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=E1102
-        # 4.        print self.blip
-        # 5.        # pylint: disable=E1101
-        # 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.Class, nodes.Function)) and node.body:
-            firstchildlineno = node.body[0].fromlineno
-        else:
-            firstchildlineno = last
-        for msgid, lines in six.iteritems(msg_state):
-            for lineno, state in list(lines.items()):
-                original_lineno = lineno
-                if first <= lineno <= last:
-                    # Set state for all lines for this block, if the
-                    # warning is applied to nodes.
-                    if  msgs_store.check_message_id(msgid).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 not line in self._module_msgs_state.get(msgid, ()):
-                            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 six.iteritems(self._raw_module_msgs_state):
-            for line, enable in six.iteritems(lines):
-                if not enable and (warning, line) not in self._ignored_msgs:
-                    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_)
-
-
-class MessagesStore(object):
-    """The messages store knows information about every possible message but has
-    no particular state during analysis.
-    """
-
-    def __init__(self):
-        # Primary registry for all active messages (i.e. all messages
-        # that can be emitted by pylint for the underlying Python
-        # version). It contains the 1:1 mapping from symbolic names
-        # to message definition objects.
-        self._messages = {}
-        # Maps alternative names (numeric IDs, deprecated names) to
-        # message definitions. May contain several names for each definition
-        # object.
-        self._alternative_names = {}
-        self._msgs_by_category = collections.defaultdict(list)
-
-    @property
-    def messages(self):
-        """The list of all active messages."""
-        return six.itervalues(self._messages)
-
-    def add_renamed_message(self, old_id, old_symbol, new_symbol):
-        """Register the old ID and symbol for a warning that was renamed.
-
-        This allows users to keep using the old ID/symbol in suppressions.
-        """
-        msg = self.check_message_id(new_symbol)
-        msg.old_names.append((old_id, old_symbol))
-        self._alternative_names[old_id] = msg
-        self._alternative_names[old_symbol] = msg
-
-    def register_messages(self, checker):
-        """register a dictionary of messages
-
-        Keys are message ids, values are a 2-uple with the message type and the
-        message itself
-
-        message ids should be a string of len 4, where the two first characters
-        are the checker id and the two last the message id in this checker
-        """
-        chkid = None
-        for msgid, msg_tuple in six.iteritems(checker.msgs):
-            msg = build_message_def(checker, msgid, msg_tuple)
-            assert msg.symbol not in self._messages, \
-                    'Message symbol %r is already defined' % msg.symbol
-            # avoid duplicate / malformed ids
-            assert msg.msgid not in self._alternative_names, \
-                   'Message id %r is already defined' % msgid
-            assert chkid is None or chkid == msg.msgid[1:3], \
-                   'Inconsistent checker part in message id %r' % msgid
-            chkid = msg.msgid[1:3]
-            self._messages[msg.symbol] = msg
-            self._alternative_names[msg.msgid] = msg
-            for old_id, old_symbol in msg.old_names:
-                self._alternative_names[old_id] = msg
-                self._alternative_names[old_symbol] = msg
-            self._msgs_by_category[msg.msgid[0]].append(msg.msgid)
-
-    def check_message_id(self, msgid):
-        """returns the Message object for this message.
-
-        msgid may be either a numeric or symbolic id.
-
-        Raises UnknownMessage if the message id is not defined.
-        """
-        if msgid[1:].isdigit():
-            msgid = msgid.upper()
-        for source in (self._alternative_names, self._messages):
-            try:
-                return source[msgid]
-            except KeyError:
-                pass
-        raise UnknownMessage('No such message id %s' % msgid)
-
-    def get_msg_display_string(self, msgid):
-        """Generates a user-consumable representation of a message.
-
-        Can be just the message ID or the ID and the symbol.
-        """
-        return repr(self.check_message_id(msgid).symbol)
-
-    def help_message(self, msgids):
-        """display help messages for the given message identifiers"""
-        for msgid in msgids:
-            try:
-                print(self.check_message_id(msgid).format_help(checkerref=True))
-                print("")
-            except UnknownMessage as ex:
-                print(ex)
-                print("")
-                continue
-
-    def list_messages(self):
-        """output full messages list documentation in ReST format"""
-        msgs = sorted(six.itervalues(self._messages), key=lambda msg: msg.msgid)
-        for msg in msgs:
-            if not msg.may_be_emitted():
-                continue
-            print(msg.format_help(checkerref=False))
-        print("")
-
-
-class ReportsHandlerMixIn(object):
-    """a mix-in class containing all the reports and stats manipulation
-    related methods for the main lint class
-    """
-    def __init__(self):
-        self._reports = collections.defaultdict(list)
-        self._reports_state = {}
-
-    def report_order(self):
-        """ Return a list of reports, sorted in the order
-        in which they must be called.
-        """
-        return list(self._reports)
-
-    def register_report(self, reportid, r_title, r_cb, checker):
-        """register a report
-
-        reportid is the unique identifier for the report
-        r_title the report's title
-        r_cb the method to call to make the report
-        checker is the checker defining the report
-        """
-        reportid = reportid.upper()
-        self._reports[checker].append((reportid, r_title, r_cb))
-
-    def enable_report(self, reportid):
-        """disable the report of the given id"""
-        reportid = reportid.upper()
-        self._reports_state[reportid] = True
-
-    def disable_report(self, reportid):
-        """disable the report of the given id"""
-        reportid = reportid.upper()
-        self._reports_state[reportid] = False
-
-    def report_is_enabled(self, reportid):
-        """return true if the report associated to the given identifier is
-        enabled
-        """
-        return self._reports_state.get(reportid, True)
-
-    def make_reports(self, stats, old_stats):
-        """render registered reports"""
-        sect = Section('Report',
-                       '%s statements analysed.'% (self.stats['statement']))
-        for checker in self.report_order():
-            for reportid, r_title, r_cb in self._reports[checker]:
-                if not self.report_is_enabled(reportid):
-                    continue
-                report_sect = Section(r_title)
-                try:
-                    r_cb(report_sect, stats, old_stats)
-                except EmptyReport:
-                    continue
-                report_sect.report_id = reportid
-                sect.append(report_sect)
-        return sect
-
-    def add_stats(self, **kwargs):
-        """add some stats entries to the statistic dictionary
-        raise an AssertionError if there is a key conflict
-        """
-        for key, value in six.iteritems(kwargs):
-            if key[-1] == '_':
-                key = key[:-1]
-            assert key not in self.stats
-            self.stats[key] = value
-        return self.stats
-
-
-def expand_modules(files_or_modules, black_list):
-    """take a list of files/modules/packages and return the list of tuple
-    (file, module name) which have to be actually checked
-    """
-    result = []
-    errors = []
-    for something in files_or_modules:
-        if exists(something):
-            # this is a file or a directory
-            try:
-                modname = '.'.join(modpath_from_file(something))
-            except ImportError:
-                modname = splitext(basename(something))[0]
-            if isdir(something):
-                filepath = join(something, '__init__.py')
-            else:
-                filepath = something
-        else:
-            # suppose it's a module or package
-            modname = something
-            try:
-                filepath = file_from_modpath(modname.split('.'))
-                if filepath is None:
-                    errors.append({'key' : 'ignored-builtin-module', 'mod': modname})
-                    continue
-            except (ImportError, SyntaxError) as ex:
-                # FIXME p3k : the SyntaxError is a Python bug and should be
-                # removed as soon as possible http://bugs.python.org/issue10588
-                errors.append({'key': 'fatal', 'mod': modname, 'ex': ex})
-                continue
-        filepath = normpath(filepath)
-        result.append({'path': filepath, 'name': modname, 'isarg': True,
-                       'basepath': filepath, 'basename': modname})
-        if not (modname.endswith('.__init__') or modname == '__init__') \
-                and '__init__.py' in filepath:
-            for subfilepath in get_module_files(dirname(filepath), black_list):
-                if filepath == subfilepath:
-                    continue
-                submodname = '.'.join(modpath_from_file(subfilepath))
-                result.append({'path': subfilepath, 'name': submodname,
-                               'isarg': False,
-                               'basepath': filepath, 'basename': modname})
-    return result, errors
-
-
-class PyLintASTWalker(object):
-
-    def __init__(self, linter):
-        # callbacks per node types
-        self.nbstatements = 1
-        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"""
-        # XXX : should be possible to merge needed_checkers and add_checker
-        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()
-        if astroid.is_statement:
-            self.nbstatements += 1
-        # generate events for this node on each checker
-        for cb in self.visit_events.get(cid, ()):
-            cb(astroid)
-        # recurse on children
-        for child in astroid.get_children():
-            self.walk(child)
-        for cb in self.leave_events.get(cid, ()):
-            cb(astroid)
-
-
-PY_EXTS = ('.py', '.pyc', '.pyo', '.pyw', '.so', '.dll')
-
-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 = splitext(filename)
-        if base in imported or base == '__pycache__':
-            continue
-        if extension in PY_EXTS and base != '__init__' or (
-                not extension and isdir(join(directory, base))):
-            try:
-                module = load_module_from_file(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