Handle ctrl-C in publish-ftpmaster

[Jeroen T. Vermeulen]

The new python-based publish-ftpmaster handles exceptions by restoring the backup copy of the archive directory. It should do the same on ctrl-C.

[Jeroen T. Vermeulen (jtv)]

Actually, I've described the old script. The new script is simpler, and may not need any special handling since it does its work in the backup dists directory, not the "real" dists directory, and only moves the updated data into place once it has succeeded.

[Jeroen T. Vermeulen (jtv)]

Phew. Looks like this isn't much of a problem after all. The backup dir gets moved to its working location for processing, and finally gets promoted to the "real" directory once done. If an Exception is caught along the way, it gets kicked back to the backup location. Or if a KeyboardInterrupt occurs along the way, it stays in the working location and the next script run will kick it back to the backup location.

It would be slightly nicer to have this taken care of upon KeyboardInterrupt as well, so people don't wonder where the backup dists dir went. But no biggie.

[Jeroen T. Vermeulen (jtv)]

And even better: the "except:" that the code uses still catches KeyboardInterrupt, despite it not being an Exception any more.

I'm proposing some extra tests just so we don't accidentally break this.

[Launchpad QA Bot (lpqabot)]

Fixed in stable r13618 <http://bazaar.launchpad.net/~launchpad-pqm/launchpad/stable/revision/13618>.