Move all package files to a pylint package.

1 files changed, 0 insertions, 615 deletions

diff --git a/checkers/strings.py b/checkers/strings.py
deleted file mode 100644
index 8892c2c..0000000
--- a/checkers/strings.py
+++ /dev/null
@@ -1,615 +0,0 @@
-# Copyright (c) 2009-2010 Arista Networks, Inc. - James Lingard
-# Copyright (c) 2004-2013 LOGILAB S.A. (Paris, FRANCE).
-# Copyright 2012 Google Inc.
-#
-# 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.
-"""Checker for string formatting operations.
-"""
-
-import sys
-import tokenize
-import string
-import numbers
-
-import astroid
-
-from pylint.interfaces import ITokenChecker, IAstroidChecker, IRawChecker
-from pylint.checkers import BaseChecker, BaseTokenChecker
-from pylint.checkers import utils
-from pylint.checkers.utils import check_messages
-
-import six
-
-
-_PY3K = sys.version_info[:2] >= (3, 0)
-_PY27 = sys.version_info[:2] == (2, 7)
-
-MSGS = {
-    'E1300': ("Unsupported format character %r (%#02x) at index %d",
-              "bad-format-character",
-              "Used when a unsupported format character is used in a format\
-              string."),
-    'E1301': ("Format string ends in middle of conversion specifier",
-              "truncated-format-string",
-              "Used when a format string terminates before the end of a \
-              conversion specifier."),
-    'E1302': ("Mixing named and unnamed conversion specifiers in format string",
-              "mixed-format-string",
-              "Used when a format string contains both named (e.g. '%(foo)d') \
-              and unnamed (e.g. '%d') conversion specifiers.  This is also \
-              used when a named conversion specifier contains * for the \
-              minimum field width and/or precision."),
-    'E1303': ("Expected mapping for format string, not %s",
-              "format-needs-mapping",
-              "Used when a format string that uses named conversion specifiers \
-              is used with an argument that is not a mapping."),
-    'W1300': ("Format string dictionary key should be a string, not %s",
-              "bad-format-string-key",
-              "Used when a format string that uses named conversion specifiers \
-              is used with a dictionary whose keys are not all strings."),
-    'W1301': ("Unused key %r in format string dictionary",
-              "unused-format-string-key",
-              "Used when a format string that uses named conversion specifiers \
-              is used with a dictionary that conWtains keys not required by the \
-              format string."),
-    'E1304': ("Missing key %r in format string dictionary",
-              "missing-format-string-key",
-              "Used when a format string that uses named conversion specifiers \
-              is used with a dictionary that doesn't contain all the keys \
-              required by the format string."),
-    'E1305': ("Too many arguments for format string",
-              "too-many-format-args",
-              "Used when a format string that uses unnamed conversion \
-              specifiers is given too many arguments."),
-    'E1306': ("Not enough arguments for format string",
-              "too-few-format-args",
-              "Used when a format string that uses unnamed conversion \
-              specifiers is given too few arguments"),
-
-    'W1302': ("Invalid format string",
-              "bad-format-string",
-              "Used when a PEP 3101 format string is invalid.",
-              {'minversion': (2, 7)}),
-    'W1303': ("Missing keyword argument %r for format string",
-              "missing-format-argument-key",
-              "Used when a PEP 3101 format string that uses named fields "
-              "doesn't receive one or more required keywords.",
-              {'minversion': (2, 7)}),
-    'W1304': ("Unused format argument %r",
-              "unused-format-string-argument",
-              "Used when a PEP 3101 format string that uses named "
-              "fields is used with an argument that "
-              "is not required by the format string.",
-              {'minversion': (2, 7)}),
-    'W1305': ("Format string contains both automatic field numbering "
-              "and manual field specification",
-              "format-combined-specification",
-              "Usen when a PEP 3101 format string contains both automatic "
-              "field numbering (e.g. '{}') and manual field "
-              "specification (e.g. '{0}').",
-              {'minversion': (2, 7)}),
-    'W1306': ("Missing format attribute %r in format specifier %r",
-              "missing-format-attribute",
-              "Used when a PEP 3101 format string uses an "
-              "attribute specifier ({0.length}), but the argument "
-              "passed for formatting doesn't have that attribute.",
-              {'minversion': (2, 7)}),
-    'W1307': ("Using invalid lookup key %r in format specifier %r",
-              "invalid-format-index",
-              "Used when a PEP 3101 format string uses a lookup specifier "
-              "({a[1]}), but the argument passed for formatting "
-              "doesn't contain or doesn't have that key as an attribute.",
-              {'minversion': (2, 7)})
-    }
-
-OTHER_NODES = (astroid.Const, astroid.List, astroid.Backquote,
-               astroid.Lambda, astroid.Function,
-               astroid.ListComp, astroid.SetComp, astroid.GenExpr)
-
-if _PY3K:
-    import _string
-
-    def split_format_field_names(format_string):
-        return _string.formatter_field_name_split(format_string)
-else:
-    def _field_iterator_convertor(iterator):
-        for is_attr, key in iterator:
-            if isinstance(key, numbers.Number):
-                yield is_attr, int(key)
-            else:
-                yield is_attr, key
-
-    def split_format_field_names(format_string):
-        keyname, fielditerator = format_string._formatter_field_name_split()
-        # it will return longs, instead of ints, which will complicate
-        # the output
-        return keyname, _field_iterator_convertor(fielditerator)
-
-
-def collect_string_fields(format_string):
-    """ Given a format string, return an iterator
-    of all the valid format fields. It handles nested fields
-    as well.
-    """
-
-    formatter = string.Formatter()
-    try:
-        parseiterator = formatter.parse(format_string)
-        for result in parseiterator:
-            if all(item is None for item in result[1:]):
-                # not a replacement format
-                continue
-            name = result[1]
-            nested = result[2]
-            yield name
-            if nested:
-                for field in collect_string_fields(nested):
-                    yield field
-    except ValueError:
-        # probably the format string is invalid
-        # should we check the argument of the ValueError?
-        raise utils.IncompleteFormatString(format_string)
-
-def parse_format_method_string(format_string):
-    """
-    Parses a PEP 3101 format string, returning a tuple of
-    (keys, num_args, manual_pos_arg),
-    where keys is the set of mapping keys in the format string, num_args
-    is the number of arguments required by the format string and
-    manual_pos_arg is the number of arguments passed with the position.
-    """
-    keys = []
-    num_args = 0
-    manual_pos_arg = set()
-    for name in collect_string_fields(format_string):
-        if name and str(name).isdigit():
-            manual_pos_arg.add(str(name))
-        elif name:
-            keyname, fielditerator = split_format_field_names(name)
-            if isinstance(keyname, numbers.Number):
-                # In Python 2 it will return long which will lead
-                # to different output between 2 and 3
-                manual_pos_arg.add(str(keyname))
-                keyname = int(keyname)
-            keys.append((keyname, list(fielditerator)))
-        else:
-            num_args += 1
-    return keys, num_args, len(manual_pos_arg)
-
-def get_args(callfunc):
-    """ Get the arguments from the given `CallFunc` node.
-    Return a tuple, where the first element is the
-    number of positional arguments and the second element
-    is the keyword arguments in a dict.
-    """
-    positional = 0
-    named = {}
-
-    for arg in callfunc.args:
-        if isinstance(arg, astroid.Keyword):
-            named[arg.arg] = utils.safe_infer(arg.value)
-        else:
-            positional += 1
-    return positional, named
-
-def get_access_path(key, parts):
-    """ Given a list of format specifiers, returns
-    the final access path (e.g. a.b.c[0][1]).
-    """
-    path = []
-    for is_attribute, specifier in parts:
-        if is_attribute:
-            path.append(".{}".format(specifier))
-        else:
-            path.append("[{!r}]".format(specifier))
-    return str(key) + "".join(path)
-
-
-class StringFormatChecker(BaseChecker):
-    """Checks string formatting operations to ensure that the format string
-    is valid and the arguments match the format string.
-    """
-
-    __implements__ = (IAstroidChecker,)
-    name = 'string'
-    msgs = MSGS
-
-    @check_messages(*(MSGS.keys()))
-    def visit_binop(self, node):
-        if node.op != '%':
-            return
-        left = node.left
-        args = node.right
-
-        if not (isinstance(left, astroid.Const)
-                and isinstance(left.value, six.string_types)):
-            return
-        format_string = left.value
-        try:
-            required_keys, required_num_args = \
-                utils.parse_format_string(format_string)
-        except utils.UnsupportedFormatCharacter as e:
-            c = format_string[e.index]
-            self.add_message('bad-format-character',
-                             node=node, args=(c, ord(c), e.index))
-            return
-        except utils.IncompleteFormatString:
-            self.add_message('truncated-format-string', node=node)
-            return
-        if required_keys and required_num_args:
-            # The format string uses both named and unnamed format
-            # specifiers.
-            self.add_message('mixed-format-string', node=node)
-        elif required_keys:
-            # The format string uses only named format specifiers.
-            # Check that the RHS of the % operator is a mapping object
-            # that contains precisely the set of keys required by the
-            # format string.
-            if isinstance(args, astroid.Dict):
-                keys = set()
-                unknown_keys = False
-                for k, _ in args.items:
-                    if isinstance(k, astroid.Const):
-                        key = k.value
-                        if isinstance(key, six.string_types):
-                            keys.add(key)
-                        else:
-                            self.add_message('bad-format-string-key',
-                                             node=node, args=key)
-                    else:
-                        # One of the keys was something other than a
-                        # constant.  Since we can't tell what it is,
-                        # supress checks for missing keys in the
-                        # dictionary.
-                        unknown_keys = True
-                if not unknown_keys:
-                    for key in required_keys:
-                        if key not in keys:
-                            self.add_message('missing-format-string-key',
-                                             node=node, args=key)
-                for key in keys:
-                    if key not in required_keys:
-                        self.add_message('unused-format-string-key',
-                                         node=node, args=key)
-            elif isinstance(args, OTHER_NODES + (astroid.Tuple,)):
-                type_name = type(args).__name__
-                self.add_message('format-needs-mapping',
-                                 node=node, args=type_name)
-            # else:
-                # The RHS of the format specifier is a name or
-                # expression.  It may be a mapping object, so
-                # there's nothing we can check.
-        else:
-            # The format string uses only unnamed format specifiers.
-            # Check that the number of arguments passed to the RHS of
-            # the % operator matches the number required by the format
-            # string.
-            if isinstance(args, astroid.Tuple):
-                num_args = len(args.elts)
-            elif isinstance(args, OTHER_NODES + (astroid.Dict, astroid.DictComp)):
-                num_args = 1
-            else:
-                # The RHS of the format specifier is a name or
-                # expression.  It could be a tuple of unknown size, so
-                # there's nothing we can check.
-                num_args = None
-            if num_args is not None:
-                if num_args > required_num_args:
-                    self.add_message('too-many-format-args', node=node)
-                elif num_args < required_num_args:
-                    self.add_message('too-few-format-args', node=node)
-
-
-class StringMethodsChecker(BaseChecker):
-    __implements__ = (IAstroidChecker,)
-    name = 'string'
-    msgs = {
-        'E1310': ("Suspicious argument in %s.%s call",
-                  "bad-str-strip-call",
-                  "The argument to a str.{l,r,}strip call contains a"
-                  " duplicate character, "),
-        }
-
-    @check_messages(*(MSGS.keys()))
-    def visit_callfunc(self, node):
-        func = utils.safe_infer(node.func)
-        if (isinstance(func, astroid.BoundMethod)
-                and isinstance(func.bound, astroid.Instance)
-                and func.bound.name in ('str', 'unicode', 'bytes')):
-            if func.name in ('strip', 'lstrip', 'rstrip') and node.args:
-                arg = utils.safe_infer(node.args[0])
-                if not isinstance(arg, astroid.Const):
-                    return
-                if len(arg.value) != len(set(arg.value)):
-                    self.add_message('bad-str-strip-call', node=node,
-                                     args=(func.bound.name, func.name))
-            elif func.name == 'format':
-                if _PY27 or _PY3K:
-                    self._check_new_format(node, func)
-
-    def _check_new_format(self, node, func):
-        """ Check the new string formatting. """
-        # TODO: skip (for now) format nodes which don't have
-        #       an explicit string on the left side of the format operation.
-        #       We do this because our inference engine can't properly handle
-        #       redefinitions of the original string.
-        #       For more details, see issue 287.
-        #
-        # Note that there may not be any left side at all, if the format method
-        # has been assigned to another variable. See issue 351. For example:
-        #
-        #    fmt = 'some string {}'.format
-        #    fmt('arg')
-        if (isinstance(node.func, astroid.Getattr)
-                and not isinstance(node.func.expr, astroid.Const)):
-            return
-        try:
-            strnode = next(func.bound.infer())
-        except astroid.InferenceError:
-            return
-        if not isinstance(strnode, astroid.Const):
-            return
-        if node.starargs or node.kwargs:
-            # TODO: Don't complicate the logic, skip these for now.
-            return
-        try:
-            positional, named = get_args(node)
-        except astroid.InferenceError:
-            return
-        try:
-            fields, num_args, manual_pos = parse_format_method_string(strnode.value)
-        except utils.IncompleteFormatString:
-            self.add_message('bad-format-string', node=node)
-            return
-
-        named_fields = set(field[0] for field in fields
-                           if isinstance(field[0], six.string_types))
-        if num_args and manual_pos:
-            self.add_message('format-combined-specification',
-                             node=node)
-            return
-
-        check_args = False
-        # Consider "{[0]} {[1]}" as num_args.
-        num_args += sum(1 for field in named_fields
-                        if field == '')
-        if named_fields:
-            for field in named_fields:
-                if field not in named and field:
-                    self.add_message('missing-format-argument-key',
-                                     node=node,
-                                     args=(field, ))
-            for field in named:
-                if field not in named_fields:
-                    self.add_message('unused-format-string-argument',
-                                     node=node,
-                                     args=(field, ))
-            # num_args can be 0 if manual_pos is not.
-            num_args = num_args or manual_pos
-            if positional or num_args:
-                empty = any(True for field in named_fields
-                            if field == '')
-                if named or empty:
-                    # Verify the required number of positional arguments
-                    # only if the .format got at least one keyword argument.
-                    # This means that the format strings accepts both
-                    # positional and named fields and we should warn
-                    # when one of the them is missing or is extra.
-                    check_args = True
-        else:
-            check_args = True
-        if check_args:
-            # num_args can be 0 if manual_pos is not.
-            num_args = num_args or manual_pos
-            if positional > num_args:
-                self.add_message('too-many-format-args', node=node)
-            elif positional < num_args:
-                self.add_message('too-few-format-args', node=node)
-
-        self._check_new_format_specifiers(node, fields, named)
-
-    def _check_new_format_specifiers(self, node, fields, named):
-        """
-        Check attribute and index access in the format
-        string ("{0.a}" and "{0[a]}").
-        """
-        for key, specifiers in fields:
-            # Obtain the argument. If it can't be obtained
-            # or infered, skip this check.
-            if key == '':
-                # {[0]} will have an unnamed argument, defaulting
-                # to 0. It will not be present in `named`, so use the value
-                # 0 for it.
-                key = 0
-            if isinstance(key, numbers.Number):
-                try:
-                    argname = utils.get_argument_from_call(node, key)
-                except utils.NoSuchArgumentError:
-                    continue
-            else:
-                if key not in named:
-                    continue
-                argname = named[key]
-            if argname in (astroid.YES, None):
-                continue
-            try:
-                argument = next(argname.infer())
-            except astroid.InferenceError:
-                continue
-            if not specifiers or argument is astroid.YES:
-                # No need to check this key if it doesn't
-                # use attribute / item access
-                continue
-            if argument.parent and isinstance(argument.parent, astroid.Arguments):
-                # Ignore any object coming from an argument,
-                # because we can't infer its value properly.
-                continue
-            previous = argument
-            parsed = []
-            for is_attribute, specifier in specifiers:
-                if previous is astroid.YES:
-                    break
-                parsed.append((is_attribute, specifier))
-                if is_attribute:
-                    try:
-                        previous = previous.getattr(specifier)[0]
-                    except astroid.NotFoundError:
-                        if (hasattr(previous, 'has_dynamic_getattr') and
-                                previous.has_dynamic_getattr()):
-                            # Don't warn if the object has a custom __getattr__
-                            break
-                        path = get_access_path(key, parsed)
-                        self.add_message('missing-format-attribute',
-                                         args=(specifier, path),
-                                         node=node)
-                        break
-                else:
-                    warn_error = False
-                    if hasattr(previous, 'getitem'):
-                        try:
-                            previous = previous.getitem(specifier)
-                        except (IndexError, TypeError):
-                            warn_error = True
-                    else:
-                        try:
-                            # Lookup __getitem__ in the current node,
-                            # but skip further checks, because we can't
-                            # retrieve the looked object
-                            previous.getattr('__getitem__')
-                            break
-                        except astroid.NotFoundError:
-                            warn_error = True
-                    if warn_error:
-                        path = get_access_path(key, parsed)
-                        self.add_message('invalid-format-index',
-                                         args=(specifier, path),
-                                         node=node)
-                        break
-
-                try:
-                    previous = next(previous.infer())
-                except astroid.InferenceError:
-                    # can't check further if we can't infer it
-                    break
-
-
-
-class StringConstantChecker(BaseTokenChecker):
-    """Check string literals"""
-    __implements__ = (ITokenChecker, IRawChecker)
-    name = 'string_constant'
-    msgs = {
-        'W1401': ('Anomalous backslash in string: \'%s\'. '
-                  'String constant might be missing an r prefix.',
-                  'anomalous-backslash-in-string',
-                  'Used when a backslash is in a literal string but not as an '
-                  'escape.'),
-        'W1402': ('Anomalous Unicode escape in byte string: \'%s\'. '
-                  'String constant might be missing an r or u prefix.',
-                  'anomalous-unicode-escape-in-string',
-                  'Used when an escape like \\u is encountered in a byte '
-                  'string where it has no effect.'),
-        }
-
-    # Characters that have a special meaning after a backslash in either
-    # Unicode or byte strings.
-    ESCAPE_CHARACTERS = 'abfnrtvx\n\r\t\\\'\"01234567'
-
-    # TODO(mbp): Octal characters are quite an edge case today; people may
-    # prefer a separate warning where they occur.  \0 should be allowed.
-
-    # Characters that have a special meaning after a backslash but only in
-    # Unicode strings.
-    UNICODE_ESCAPE_CHARACTERS = 'uUN'
-
-    def process_module(self, module):
-        self._unicode_literals = 'unicode_literals' in module.future_imports
-
-    def process_tokens(self, tokens):
-        for (tok_type, token, (start_row, _), _, _) in tokens:
-            if tok_type == tokenize.STRING:
-                # 'token' is the whole un-parsed token; we can look at the start
-                # of it to see whether it's a raw or unicode string etc.
-                self.process_string_token(token, start_row)
-
-    def process_string_token(self, token, start_row):
-        for i, c in enumerate(token):
-            if c in '\'\"':
-                quote_char = c
-                break
-        # pylint: disable=undefined-loop-variable
-        prefix = token[:i].lower() #  markers like u, b, r.
-        after_prefix = token[i:]
-        if after_prefix[:3] == after_prefix[-3:] == 3 * quote_char:
-            string_body = after_prefix[3:-3]
-        else:
-            string_body = after_prefix[1:-1]  # Chop off quotes
-        # No special checks on raw strings at the moment.
-        if 'r' not in prefix:
-            self.process_non_raw_string_token(prefix, string_body, start_row)
-
-    def process_non_raw_string_token(self, prefix, string_body, start_row):
-        """check for bad escapes in a non-raw string.
-
-        prefix: lowercase string of eg 'ur' string prefix markers.
-        string_body: the un-parsed body of the string, not including the quote
-        marks.
-        start_row: integer line number in the source.
-        """
-        # Walk through the string; if we see a backslash then escape the next
-        # character, and skip over it.  If we see a non-escaped character,
-        # alert, and continue.
-        #
-        # Accept a backslash when it escapes a backslash, or a quote, or
-        # end-of-line, or one of the letters that introduce a special escape
-        # sequence <http://docs.python.org/reference/lexical_analysis.html>
-        #
-        # TODO(mbp): Maybe give a separate warning about the rarely-used
-        # \a \b \v \f?
-        #
-        # TODO(mbp): We could give the column of the problem character, but
-        # add_message doesn't seem to have a way to pass it through at present.
-        i = 0
-        while True:
-            i = string_body.find('\\', i)
-            if i == -1:
-                break
-            # There must be a next character; having a backslash at the end
-            # of the string would be a SyntaxError.
-            next_char = string_body[i+1]
-            match = string_body[i:i+2]
-            if next_char in self.UNICODE_ESCAPE_CHARACTERS:
-                if 'u' in prefix:
-                    pass
-                elif (_PY3K or self._unicode_literals) and 'b' not in prefix:
-                    pass  # unicode by default
-                else:
-                    self.add_message('anomalous-unicode-escape-in-string',
-                                     line=start_row, args=(match, ))
-            elif next_char not in self.ESCAPE_CHARACTERS:
-                self.add_message('anomalous-backslash-in-string',
-                                 line=start_row, args=(match, ))
-            # Whether it was a valid escape or not, backslash followed by
-            # another character can always be consumed whole: the second
-            # character can never be the start of a new backslash escape.
-            i += 2
-
-
-
-def register(linter):
-    """required method to auto register this checker """
-    linter.register_checker(StringFormatChecker(linter))
-    linter.register_checker(StringMethodsChecker(linter))
-    linter.register_checker(StringConstantChecker(linter))