Shift exception formatting into the UI

Now we use bb.exceptions to pass pickleable traceback entries to the UI, and
the UI is free to do whatever it wants to do with this information. By
default, the log formatter for the UIs formats it with bb.exceptions.  This
also means that all exceptions should now show 3 lines of context and limit to
5 entries.

(Bitbake rev: ee48d628ee038bd72e1cd94aa75f5ccbacbcee4c)

Signed-off-by: Chris Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -1225,7 +1225,7 @@ class CookerParser(object):
             raise
         except ParsingFailure as exc:
             self.shutdown(clean=False)
-            bb.fatal('Error parsing %s: %s' %
+            bb.fatal('Unable to parse %s: %s' %
                      (exc.recipe, bb.exceptions.to_string(exc.realexception)))
         except bb.parse.ParseError as exc:
             bb.fatal(str(exc))
@@ -1233,13 +1233,11 @@ class CookerParser(object):
             logger.error('Unable to parse %s', exc.recipe)
             sys.exit(1)
         except Exception as exc:
-            import traceback
             etype, value, tb = sys.exc_info()
-            formatted = bb.exceptions.format_extracted(value.traceback, limit=5)
-            formatted.extend(traceback.format_exception_only(etype, value))
-
+            logger.error('Unable to parse %s', value.recipe,
+                         exc_info=(etype, value, exc.traceback))
             self.shutdown(clean=False)
-            bb.fatal('Error parsing %s:\n%s' % (value.recipe, ''.join(formatted)))
+            sys.exit(1)
 
         self.current += 1
         self.virtuals += len(result)

bitbake/lib/bb/event.py

@@ -30,6 +30,7 @@ except ImportError:
     import pickle
 import logging
 import atexit
+import traceback
 import bb.utils
 
 # This is the pid for which we should generate the event. This is set when
@@ -423,6 +424,12 @@ class LogHandler(logging.Handler):
     """Dispatch logging messages as bitbake events"""
 
     def emit(self, record):
+        if record.exc_info:
+            etype, value, tb = record.exc_info
+            if hasattr(tb, 'tb_next'):
+                tb = list(bb.exceptions.extract_traceback(tb, context=3))
+            record.bb_exc_info = (etype, value, tb)
+            record.exc_info = None
         fire(record, None)
 
     def filter(self, record):

bitbake/lib/bb/msg.py

@@ -65,9 +65,15 @@ class BBLogFormatter(logging.Formatter):
     def format(self, record):
         record.levelname = self.getLevelName(record.levelno)
         if record.levelno == self.PLAIN:
-            return record.getMessage()
+            msg = record.getMessage()
         else:
-            return logging.Formatter.format(self, record)
+            msg = logging.Formatter.format(self, record)
+
+        if hasattr(record, 'bb_exc_info'):
+            etype, value, tb = record.bb_exc_info
+            formatted = bb.exceptions.format_exception(etype, value, tb, limit=5)
+            msg += '\n' + ''.join(formatted)
+        return msg
 
 class Loggers(dict):
     def __getitem__(self, key):