buildbot doesn't respond to darcs tags

[zooko]

Darcs tags are patches -- buildbot should respond to the event of a darcs tag arriving, but apparently it ignores them, possibly because they don't touch any files.

[zooko]

So now I care about this issue even more, because I want to problem my buildbots to do certain things *only* in the case of a darcs tag. Namely, build binaries of the software and upload the binaries to  http://pypi.python.org/pypi/zfec and  http://pypi.python.org/pypi/pycryptopp , respectively.

[dustin]

I think the typical solution to this is to create a "fake" change with a fake file in it. Want to hack something up?

[zooko]

 tahoe #422 (have buildslaves automatically build debian packages of foolscap, zfec, pycryptopp, etc.) would be able to benefit from fixing this ticket.

Dustin: I don't yet understand what you mean about a "fake" change with a fake file. I would have thought that the solution would be to find the part of buildbot code that says "If there are changed in the source tree" and replace it with "If there was a patch".

[dustin]

I don't recall the details, but there was a case in one of the VCs where a commit could be made that didn't really change anything -- essentially a tag. One way to make buildbot recognize this was to create a Change with files=fake?. Your suggestion might work too.