Singlethreading patch series

[Sebastian Spaeth]

On Mon, 10 Jan 2011 12:08:34 +0100, Johannes Stezenbach <js at sig21.net> wrote:
> IMHO your patches 1...3 do not fix the no-traceback issue
> (leaving the catch-all except: + self.ui.warn in place),
> and litter the code with KeyboardInterrupt special handling.
> I would argue that catch-all except: is almost always a bug,
> and if you fix that we'd end up with a much better patch.

I agree that they do not fix the no-traceback issue completely yet, but
I was told (by you :-)) to not overwhelm the maintainers with too many
patches and changes. So let's do baby steps. This patch series allows us
to run all the code in a single thread and it allows us to abort the run
with ctrl-c.

This is an improvment.

I do not like the catch-it-all exceptions either but they were already
there in the code, and I agree with Nicolas that we should probably deal
with those in a separate patch series after this one has gone into the
code.

IMHO, we should only catch exceptions where they are either
a) expected and harmless or
b) raising an exception would lead to a weird traceback rather than a
nice error message (your example of the interrupted network connetion
was pretty good).

In any case, we should never catch all possible exceptions but only
those that we expect to be raised at a certain point.

Does this sound like a good plan?
Sebastian