[Hackage] #695: cabal install world always reinstalls programs

[Hackage]

#695: cabal install world always reinstalls programs
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  Reporter:  duncan              |        Owner:     
      Type:  defect              |       Status:  new
  Priority:  normal              |    Milestone:     
 Component:  cabal-install tool  |      Version:     
  Severity:  normal              |     Keywords:     
Difficulty:  easy (<4 hours)     |   Ghcversion:     
  Platform:                      |  
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 cabal-install does not currently track the installed state of programs. It
 does now list them in the world file however. This leads to it always
 wanting to reinstall programs.

 Probably we do want to keep the programs in the world file, since we
 hopefully will track programs better in future. The temporary hack would
 be to filter out packages that have no lib when retrieving packages from
 the world file.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/695>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects