[Hackage] #623: when a package is already installed, print the version as well

[Hackage]

#623: when a package is already installed, print the version as well
---------------------------------+------------------------------------------
  Reporter:  guest               |        Owner:         
      Type:  enhancement         |       Status:  new    
  Priority:  normal              |    Milestone:         
 Component:  cabal-install tool  |      Version:  1.6.0.1
  Severity:  normal              |     Keywords:         
Difficulty:  unknown             |   Ghcversion:         
  Platform:                      |  
---------------------------------+------------------------------------------
 At the moment, when a package is already installed, '''cabal-install'''
 prints a message like the following:

 {{{
 > cabal install 'HaXml>1.3'
 Resolving dependencies...
 No packages to be installed. All the requested packages are already
 installed.
 If you want to reinstall anyway then use the --reinstall flag.
 }}}

 It would be helpful to print the version(s) of the requested package(s) as
 well.

 One case where this would be useful is to help the user realise that a
 preferred-version entry is in effect - in the case above, the version of
 !HaXml selected would be 1.13.3, while the latest version on hackage is
 1.20.

 The output could look like this:
 {{{
 > cabal install 'HaXml>1.3'
 Resolving dependencies...
 No packages to be installed. All the requested packages are already
 installed, in particular:
 HaXml-1.13.3
 If you want to reinstall anyway then use the --reinstall flag.
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/623>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects