[content/test/gpu] Run pylint check of gpu tests in unittest instead of PRESUBMIT

third_party/pylint/pylint/checkers/newstyle.py

+# Copyright (c) 2005-2014 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.
+"""check for new / old style related problems
+"""
+import sys
+
+import astroid
+
+from pylint.interfaces import IAstroidChecker, INFERENCE, INFERENCE_FAILURE, HIGH
+from pylint.checkers import BaseChecker
+from pylint.checkers.utils import (
+    check_messages,
+    has_known_bases,
+    node_frame_class,
+)
+
+MSGS = {
+    'E1001': ('Use of __slots__ on an old style class',
+              'slots-on-old-class',
+              'Used when an old style class uses the __slots__ attribute.',
+              {'maxversion': (3, 0)}),
+    'E1002': ('Use of super on an old style class',
+              'super-on-old-class',
+              'Used when an old style class uses the super builtin.',
+              {'maxversion': (3, 0)}),
+    'E1003': ('Bad first argument %r given to super()',
+              'bad-super-call',
+              'Used when another argument than the current class is given as \
+              first argument of the super builtin.'),
+    'E1004': ('Missing argument to super()',
+              'missing-super-argument',
+              'Used when the super builtin didn\'t receive an \
+               argument.',
+              {'maxversion': (3, 0)}),
+    'W1001': ('Use of "property" on an old style class',
+              'property-on-old-class',
+              'Used when Pylint detect the use of the builtin "property" \
+              on an old style class while this is relying on new style \
+              classes features.',
+              {'maxversion': (3, 0)}),
+    'C1001': ('Old-style class defined.',
+              'old-style-class',
+              'Used when a class is defined that does not inherit from another'
+              'class and does not inherit explicitly from "object".',
+              {'maxversion': (3, 0)})
+    }
+
+
+class NewStyleConflictChecker(BaseChecker):
+    """checks for usage of new style capabilities on old style classes and
+    other new/old styles conflicts problems
+    * use of property, __slots__, super
+    * "super" usage
+    """
+
+    __implements__ = (IAstroidChecker,)
+
+    # configuration section name
+    name = 'newstyle'
+    # messages
+    msgs = MSGS
+    priority = -2
+    # configuration options
+    options = ()
+
+    @check_messages('slots-on-old-class', 'old-style-class')
+    def visit_class(self, node):
+        """ Check __slots__ in old style classes and old
+        style class definition.
+        """
+        if '__slots__' in node and not node.newstyle:
+            confidence = (INFERENCE if has_known_bases(node)
+                          else INFERENCE_FAILURE)
+            self.add_message('slots-on-old-class', node=node,
+                             confidence=confidence)
+        # The node type could be class, exception, metaclass, or
+        # interface.  Presumably, the non-class-type nodes would always
+        # have an explicit base class anyway.
+        if not node.bases and node.type == 'class' and not node.metaclass():
+            # We use confidence HIGH here because this message should only ever
+            # be emitted for classes at the root of the inheritance hierarchyself.
+            self.add_message('old-style-class', node=node, confidence=HIGH)
+
+    @check_messages('property-on-old-class')
+    def visit_callfunc(self, node):
+        """check property usage"""
+        parent = node.parent.frame()
+        if (isinstance(parent, astroid.Class) and
+                not parent.newstyle and
+                isinstance(node.func, astroid.Name)):
+            confidence = (INFERENCE if has_known_bases(parent)
+                          else INFERENCE_FAILURE)
+            name = node.func.name
+            if name == 'property':
+                self.add_message('property-on-old-class', node=node,
+                                 confidence=confidence)
+
+    @check_messages('super-on-old-class', 'bad-super-call', 'missing-super-argument')
+    def visit_function(self, node):
+        """check use of super"""
+        # ignore actual functions or method within a new style class
+        if not node.is_method():
+            return
+        klass = node.parent.frame()
+        for stmt in node.nodes_of_class(astroid.CallFunc):
+            if node_frame_class(stmt) != node_frame_class(node):
+                # Don't look down in other scopes.
+                continue
+            expr = stmt.func
+            if not isinstance(expr, astroid.Getattr):
+                continue
+            call = expr.expr
+            # skip the test if using super
+            if isinstance(call, astroid.CallFunc) and \
+               isinstance(call.func, astroid.Name) and \
+               call.func.name == 'super':
+                confidence = (INFERENCE if has_known_bases(klass)
+                              else INFERENCE_FAILURE)
+                if not klass.newstyle:
+                    # super should not be used on an old style class
+                    self.add_message('super-on-old-class', node=node,
+                                     confidence=confidence)
+                else:
+                    # super first arg should be the class
+                    if not call.args and sys.version_info[0] == 3:
+                        # unless Python 3
+                        continue
+
+                    try:
+                        supcls = (call.args and next(call.args[0].infer())
+                                  or None)
+                    except astroid.InferenceError:
+                        continue
+
+                    if supcls is None:
+                        self.add_message('missing-super-argument', node=call,
+                                         confidence=confidence)
+                        continue
+
+                    if klass is not supcls:
+                        name = None
+                        # if supcls is not YES, then supcls was infered
+                        # and use its name. Otherwise, try to look
+                        # for call.args[0].name
+                        if supcls is not astroid.YES:
+                            name = supcls.name
+                        else:
+                            if hasattr(call.args[0], 'name'):
+                                name = call.args[0].name
+                        if name is not None:
+                            self.add_message('bad-super-call',
+                                             node=call,
+                                             args=(name, ),
+                                             confidence=confidence)
+
+
+def register(linter):
+    """required method to auto register this checker """
+    linter.register_checker(NewStyleConflictChecker(linter))