[GHC] #8489: clean up dependency and usages handling in interface files

[GHC]

#8489: clean up dependency and usages handling in interface files
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              Reporter:  errge       |            Owner:  errge
                  Type:  task        |           Status:  new
              Priority:  normal      |        Milestone:  7.10.1
             Component:  Template    |          Version:  7.7
  Haskell                            |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Moderate (less
  Unknown/Multiple                   |  than a day)
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by errge):

 Simon, unfortunately this is not done yet and that is totally on me :(

 The main task here is to "fix TH module reification to reify direct import
 list, not usages"

 So just having more comments is not enought, actual coding (and probably
 some refactoring) has to happen.  On the other hand, I am pretty sure that
 the better comments will help me to get back up to speed more quickly when
 I sit down to handle this.

 I still plan to work on this, so feel free to leave me as owner unless
 someone else wants to tackle this before me in which case I am happy to
 discuss more if questions come up.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8489#comment:3>
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