[GHC] #9507: ghc-pkg mode to query by package-key

[GHC]

#9507: ghc-pkg mode to query by package-key
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        Reporter:  ezyang            |                   Owner:  ezyang
            Type:  feature request   |                  Status:  patch
        Priority:  normal            |               Milestone:  7.10.2
       Component:  ghc-pkg           |                 Version:  7.9
      Resolution:                    |                Keywords:  backpack
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D946
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Comment (by Edward Z. Yang <ezyang@…>):

 In [changeset:"c69b69d2cda890e6f3f6aa1fd4092421e6053b89/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="c69b69d2cda890e6f3f6aa1fd4092421e6053b89"
 ghc-pkg support query by package-key, fixes #9507

 Signed-off-by: Edward Z. Yang <ezyang at cs.stanford.edu>

 Test Plan: validate

 Reviewers: austin

 Subscribers: bgamari, thomie

 Differential Revision: https://phabricator.haskell.org/D946

 GHC Trac Issues: #9507
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9507#comment:3>
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