id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc,difficulty,ghcversion,platform
235,cabal list should also list installed packages,duncan,,"Currently `cabal list foo` only looks at the available packages and not at the installed ones.

The `cabal list` command output needs improving. It currently lists all available versions of available (but not installed) packages. That's both too much and too little info. We want to know for each matching package the installed versions and we probably do not need to know every single available version.

There are already `RepoIndex` and `LocalIndex` types for doing lookups so this task is just to format the information nicely. See the `Hackage.List` module in `cabal-install`.

For reference you might like to look at what other similar tools do. For example Gentoo's `esearch` utility gives us:

{{{
$ esearch xmonad
[ Results for search key : xmonad ]
[ Applications found : 2 ]

*  x11-wm/xmonad
      Latest version available: 0.5-r1
      Latest version installed: 0.5
      Size of downloaded files: [no/bad digest]
      Homepage:    http://www.xmonad.org/
      Description: A lightweight X11 window manager
      License:     BSD

*  x11-wm/xmonad-contrib
      Latest version available: 0.5-r1
      Latest version installed: [ Not Installed ]
      Size of downloaded files: [no/bad digest]
      Homepage:    http://www.xmonad.org/
      Description: Third party extentions for xmonad
      License:     BSD
}}}",enhancement,closed,normal,,cabal-install tool,1.2.3.0,normal,fixed,,,easy (<4 hours),6.8.2,