[Buildbot] #3022: Provide a MatrixBuilderFactory

[Buildbot trac]

#3022: Provide a MatrixBuilderFactory
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Reporter:  Ben          |       Owner:
    Type:  enhancement  |      Status:  new
Priority:  major        |   Milestone:  undecided
 Version:  master       |  Resolution:
Keywords:               |
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Comment (by dustin):

 I think this muddies the definitions. Currently builders are "AND" and
 slaves are "OR", and even if people don't know that yet, once they learn
 it that's a simple thing to remember.

 If you want parallel operations, you need multiple builders.

 We currently tie a lot of other things to builders (not least of which is
 display), and that makes adding multiple builders a bit awkward.  But I
 don't think that justifies changing the way builders and slaves work.

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Ticket URL: <http://trac.buildbot.net/ticket/3022#comment:1>
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