Improve main exception handling: display traceback, handle BdbQuit

It handles "empty" exceptions (e.g. from BdbQuit (via ipdb.set_trace))
better and just makes Python display any uncaught exceptions (with
traceback) by raising them.

This removes the additional newlines, too.

diff --git a/autorandr.py b/autorandr.py
index 1658f26e6a097b2733034c5e5fbdf6d5fe443bda..f62c34dd30396d4b09789ef9063e8ce142776d7c 100755 (executable)
--- a/autorandr.py
+++ b/autorandr.py
@@ -713,12 +713,13 @@ if __name__ == '__main__':
     try:
         main(sys.argv)
     except AutorandrException as e:
-        print(file=sys.stderr)
         print(e, file=sys.stderr)
         sys.exit(1)
     except Exception as e:
-        trace = sys.exc_info()[2]
-        while trace.tb_next:
-            trace = trace.tb_next
-            print("\nUnhandled exception in line %d. Please report this as a bug:\n  %s" % (trace.tb_lineno, "\n  ".join(str(e).split("\n")),), file=sys.stderr)
-        sys.exit(1)
+        if not len(str(e)):  # BdbQuit
+            print("Exception: {0}".format(e.__class__.__name__))
+            sys.exit(2)
+
+        print("Unhandled exception ({0}). Please report this as a bug.".format(
+            e), file=sys.stderr)
+        raise