[Buildbot-devel] buildbot-0.6.2: need to change master.cfg?

[Brian Warner]

> > BTW, I'm seeing these errors using my 0.6.1 master.cfg with 0.6.2:
> 
> fixed, patch below.  However, I still get errors from all the slaves;
> is it necessary to recreate slave directories every time buildbot
> is upgraded?   (I'm about to try deleting and recreating one now.)

Well, sometimes. Specifically it may be necessary to re-create the .tap file
on each upgrade (in general you can leave the rest of the directory alone).

Sometimes I try to avoid that requirement: the ideal fix would either be to
add 'bots' as a class-level attribute, or to bump the styles.Versioned number
and provide an upgrade method. However, ever since the build status was moved
out of the buildmaster-shutdown.tap file, the need to keep a .tap around has
gone away, so I haven't been as conscientious about maintaining an upgrade
path for old .taps. This sort of problem happens when new attributes are
added: the old serialized application instance doesn't have them, the new
code expects them to be in place.

In the case of 0.6.2, you need to re-create both the master and the slave
taps upon upgrade. One way is to run 'buildbot master --force
/PATH/TO/MASTER' and such. Another way is to run mktap directly. For the next
release, I plan to add a 'tap' target to the convenience Makefile which will
re-create the .tap file using the same arguments that were used originally,
which should make this somewhat more straightforward.

Sorry for the inconvenience. I could either put more energy into making old
taps usable with newer code, or I could put more energy into mentioning the
occasional need to re-create the .tap files in the docs. Thoughts?

cheers,
 -Brian