[devel at bb.net] RFC: Mercurial bookmark and multi-branch support

[Hollis Blanchard]

I work with some Mercurial trees that use more than one bookmark (an 
alternative form of branches). I found that Buildbot only supports a 
single branch, so I had to extend it.

Logically speaking I think there are three changes: using StateMixin, 
supporting multiple branches, and supporting bookmarks. Is it worth 
trying to to split them up?

The attached patch is an RFC because:

  * I'm not sure how you like patches delivered (email?), or what style.
  * It's against 1.8.0. I will update to master and retest everything
    with python3 after I figure out how you'd like the new code to be
    submitted.
  * I didn't attempt to do anything with backwards compatibility for old
    databases that only track a single branch. Do you care? Maybe it's
    as easy as checking the type of the getState() result, and
    ignoring/replacing it if it's a single revision?

-- 
Hollis Blanchard
Mentor Graphics Emulation Division

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