[Buildbot] #3275: nextSlave should be able to choose slave according to "build request"

[Buildbot trac]

#3275: nextSlave should be able to choose slave according to "build request"
------------------------+------------------------
Reporter:  nam4dev      |       Owner:
    Type:  enhancement  |      Status:  new
Priority:  major        |   Milestone:  undecided
 Version:  master       |  Resolution:
Keywords:               |
------------------------+------------------------
Changes (by nam4dev):

 * cc: namgyalx.brisson@… (added)
 * type:  undecided => enhancement


Comment:

 For now, I use "canStartBuild" method, which is call for each slave.

 What I need is to be able to select slaves according "Build Request"
 instance in the "nextSlave" method to filter at once all candidates.

 It seems to me the best and cleanest solution than using "canStartBuild",
 as for a large amount of slaves it may impact performances.

 I committed on my branch, a proposal, maybe not the best way to implement
 it.

 Commit:
 https://github.com/nam4dev/buildbot/commit/6d804c9f43711bcdc25b129686ed146b93c6473c

 I remain open to your suggestions...

 Sincerely,

 Nam4dev.

--
Ticket URL: <http://trac.buildbot.net/ticket/3275#comment:1>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation