Revert "Revert "pylint: upgrade to 1.3.1""

third_party/pylint/checkers/newstyle.py

-# Copyright (c) 2005-2006 LOGILAB S.A. (Paris, FRANCE).
+# 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.,
-# 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 """check for new / old style related problems
 """
+import sys
 
-from logilab import astng
+import astroid
 
-from pylint.interfaces import IASTNGChecker
+from pylint.interfaces import IAstroidChecker
 from pylint.checkers import BaseChecker
 from pylint.checkers.utils import check_messages
 
 MSGS = {
     'E1001': ('Use of __slots__ on an old style class',
-              'Used when an old style class uses the __slots__ attribute.'),
+              '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',
-              'Used when an old style class uses the super builtin.'),
-    'E1003': ('Bad first argument %r given to super 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'),
+              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                                                            
+    other new/old styles conflicts problems
+    * use of property, __slots__, super
+    * "super" usage
     """
-    
-    __implements__ = (IASTNGChecker,)
+
+    __implements__ = (IAstroidChecker,)
 
     # configuration section name
     name = 'newstyle'
     # messages
     msgs = MSGS
     priority = -2
     # configuration options
     options = ()
 
-    @check_messages('E1001')
+    @check_messages('slots-on-old-class', 'old-style-class')
     def visit_class(self, node):
         """check __slots__ usage
-        """        
+        """
         if '__slots__' in node and not node.newstyle:
-            self.add_message('E1001', node=node)
+            self.add_message('slots-on-old-class', node=node)
+        # 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':
+            self.add_message('old-style-class', node=node)
 
-    @check_messages('W1001')
+    @check_messages('property-on-old-class')
     def visit_callfunc(self, node):
         """check property usage"""
         parent = node.parent.frame()
-        if (isinstance(parent, astng.Class) and
-            not parent.newstyle and
-            isinstance(node.func, astng.Name)):
+        if (isinstance(parent, astroid.Class) and
+                not parent.newstyle and
+                isinstance(node.func, astroid.Name)):
             name = node.func.name
             if name == 'property':
-                self.add_message('W1001', node=node)
+                self.add_message('property-on-old-class', node=node)
 
-    @check_messages('E1002', 'E1003')
+    @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(astng.CallFunc):
+        for stmt in node.nodes_of_class(astroid.CallFunc):
             expr = stmt.func
-            if not isinstance(expr, astng.Getattr):
+            if not isinstance(expr, astroid.Getattr):
                 continue
             call = expr.expr
             # skip the test if using super
-            if isinstance(call, astng.CallFunc) and \
-               isinstance(call.func, astng.Name) and \
+            if isinstance(call, astroid.CallFunc) and \
+               isinstance(call.func, astroid.Name) and \
                call.func.name == 'super':
                 if not klass.newstyle:
                     # super should not be used on an old style class
-                    self.add_message('E1002', node=node)
+                    self.add_message('super-on-old-class', node=node)
                 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 call.args[0].infer().next()
                                   or None)
-                    except astng.InferenceError:
+                    except astroid.InferenceError:
                         continue
+
+                    if supcls is None:
+                        self.add_message('missing-super-argument', node=call)
+                        continue
+
                     if klass is not supcls:
-                        supcls = getattr(supcls, 'name', supcls)
-                        self.add_message('E1003', node=node, args=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, ))
 
 
 def register(linter):
     """required method to auto register this checker """
     linter.register_checker(NewStyleConflictChecker(linter))