Add pylint to depot_tools.

third_party/logilab/astng/mixins.py

+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Lesser 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser 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.
+# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+# copyright 2003-2010 Sylvain Thenault, all rights reserved.
+# contact mailto:thenault@gmail.com
+#
+# This file is part of logilab-astng.
+#
+# logilab-astng is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published by the
+# Free Software Foundation, either version 2.1 of the License, or (at your
+# option) any later version.
+#
+# logilab-astng 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 Lesser General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with logilab-astng. If not, see <http://www.gnu.org/licenses/>.
+"""This module contains some mixins for the different nodes.
+"""
+
+from logilab.astng.exceptions import (ASTNGBuildingException, InferenceError,
+                                      NotFoundError)
+
+
+class BlockRangeMixIn(object):
+    """override block range """
+    def set_line_info(self, lastchild):
+        self.fromlineno = self.lineno
+        self.tolineno = lastchild.tolineno
+        self.blockstart_tolineno = self._blockstart_toline()
+
+    def _elsed_block_range(self, lineno, orelse, last=None):
+        """handle block line numbers range for try/finally, for, if and while
+        statements
+        """
+        if lineno == self.fromlineno:
+            return lineno, lineno
+        if orelse:
+            if lineno >= orelse[0].fromlineno:
+                return lineno, orelse[-1].tolineno
+            return lineno, orelse[0].fromlineno - 1
+        return lineno, last or self.tolineno
+
+class FilterStmtsMixin(object):
+    """Mixin for statement filtering and assignment type"""
+
+    def _get_filtered_stmts(self, _, node, _stmts, mystmt):
+        """method used in _filter_stmts to get statemtents and trigger break"""
+        if self.statement() is mystmt:
+            # original node's statement is the assignment, only keep
+            # current node (gen exp, list comp)
+            return [node], True
+        return _stmts, False
+
+    def ass_type(self):
+        return self
+
+
+class AssignTypeMixin(object):
+
+    def ass_type(self):
+        return self
+
+    def _get_filtered_stmts(self, lookup_node, node, _stmts, mystmt):
+        """method used in filter_stmts"""
+        if self is mystmt:
+            return _stmts, True
+        if self.statement() is mystmt:
+            # original node's statement is the assignment, only keep
+            # current node (gen exp, list comp)
+            return [node], True
+        return _stmts, False
+
+
+class ParentAssignTypeMixin(AssignTypeMixin):
+
+    def ass_type(self):
+        return self.parent.ass_type()
+
+
+
+class FromImportMixIn(FilterStmtsMixin):
+    """MixIn for From and Import Nodes"""
+
+    def _infer_name(self, frame, name):
+        return name
+
+    def do_import_module(self, modname):
+        """return the ast for a module whose name is <modname> imported by <self>
+        """
+        # handle special case where we are on a package node importing a module
+        # using the same name as the package, which may end in an infinite loop
+        # on relative imports
+        # XXX: no more needed ?
+        mymodule = self.root()
+        level = getattr(self, 'level', None) # Import as no level
+        # XXX we should investigate deeper if we really want to check
+        # importing itself: modname and mymodule.name be relative or absolute
+        if mymodule.relative_to_absolute_name(modname, level) == mymodule.name:
+            # FIXME: we used to raise InferenceError here, but why ?
+            return mymodule
+        try:
+            return mymodule.import_module(modname, level=level)
+        except ASTNGBuildingException:
+            raise InferenceError(modname)
+        except SyntaxError, ex:
+            raise InferenceError(str(ex))
+
+    def real_name(self, asname):
+        """get name from 'as' name"""
+        for name, _asname in self.names:
+            if name == '*':
+                return asname
+            if not _asname:
+                name = name.split('.', 1)[0]
+                _asname = name
+            if asname == _asname:
+                return name
+        raise NotFoundError(asname)
+
+
+