py3k: need to handle guess_encoding in astng

Astng will try to find the right encoding and provide the right "stream"
interface for the Pylint checkers.
Reading a stream with the wrong encoding in py3k will generate a UnicodeError.

The introduced a 'F0010' failure should maybe be replaced by E0501, E0502 and
F0002? However, can we call 'unexpected errors' the ASTNGBuildingExceptions
that we raise in logilab.astng.builder?

1 files changed, 8 insertions, 6 deletions

diff --git a/examples/custom_raw.py b/examples/custom_raw.py
index 701f6e9..811c785 100644
--- a/examples/custom_raw.py
+++ b/examples/custom_raw.py
@@ -5,7 +5,7 @@ class MyRawChecker(BaseChecker):
     """check for line continuations with '\' instead of using triple
     quoted string or parenthesis
     """
-    
+
     __implements__ = IRawChecker
 
     name = 'custom_raw'
@@ -15,17 +15,19 @@ class MyRawChecker(BaseChecker):
             }
     options = ()
 
-    def process_module(self, stream):
+    def process_module(self, node):
         """process a module
-        
-        the module's content is accessible via the stream object
+
+        the module's content is accessible via node.file_stream object
         """
+        stream = node.file_stream
+        stream.seek(0)
         for (lineno, line) in enumerate(stream):
             if line.rstrip().endswith('\\'):
                 self.add_message('W9901', line=lineno)
 
-    
+
 def register(linter):
     """required method to auto register this checker"""
     linter.register_checker(MyRawChecker(linter))
-        
+