[GHC] #14505: CircleCI only builds pushed heads

[GHC]

#14505: CircleCI only builds pushed heads
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  bgamari
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Continuous        |              Version:  8.2.1
  Integration                        |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 > Does this mean that the builders will not run on differentials? This
 seems like a very serious flaw if so.

 Differentials unfortunately need to be handled separately but sadly this
 isn't entirely trivial due to the GitHub-centric nature of CircleCI. See
 #14506.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14505#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler