[Buildbot-devel] BuildStep tangle

[Tom Prince]

I have implemented code for handling build step factories without need
for user support here:

https://github.com/tomprince/buildbot/compare/buildbot:master...magic-__new__

In particular, it makes the .addFactoryArguments calls unneccessary
(although the function itself remains, for backwards comaptabilty).
It does this by capturing the arguments passed to __init__, by
overriding BuildStep.__new__.

This supports the current preferred form of calling .addStep with a
BuildStep instance, but doesn't support the tuple form of specifying
step factories.

My plan is to officially deprecate the undocumented tuple form for
arguments to .addStep in 0.8.6, which is going to be released shortly,
and then merge the new code once 0.8.6 has been released.

  Tom