[Hackage] #453: "cabal fetch" should take output arguments

[Hackage]

#453: "cabal fetch" should take output arguments
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  Reporter:  gregorycollins      |        Owner:                     
      Type:  enhancement         |       Status:  new                
  Priority:  high                |    Milestone:  cabal-install-0.8  
 Component:  cabal-install tool  |      Version:  HEAD               
  Severity:  normal              |   Resolution:                     
  Keywords:                      |   Difficulty:  very easy (<1 hour)
Ghcversion:  6.10.1              |     Platform:                     
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Changes (by duncan):

  * difficulty:  easy (<4 hours) => very easy (<1 hour)

Comment:

 And I should note that it's actually really very easy. Adding an extra
 command line arg is easy as is adding the plumbing to get the info to the
 right place. The only tricky thing is that for `fetch -o` we do not care
 about dependencies so we should use the logic for `unpack` rather than the
 normal `fetch`.

 Bonus points for refactoring to unify the two methods and using a
 parameter to specify if we want to download deps into the cache too.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/453#comment:9>
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