File hackage-db.cabal of Package ghc-hackage-db.6476

Name:                   hackage-db
Version:                1.22
x-revision: 1
Copyright:              Peter Simons
License:                BSD3
License-File:           LICENSE
Author:                 Peter Simons <simons@cryp.to>
Maintainer:             Peter Simons <simons@cryp.to>
Homepage:               http://github.com/peti/hackage-db
Category:               Distribution
Synopsis:               access Hackage's package database via Data.Map
Cabal-Version:          >= 1.6
Build-Type:             Simple
Tested-With:            GHC >= 6.10.4 && <= 7.8.4
Description:
   This module provides simple access to the Hackage database by means
   of @Data.Map@. Suppose you wanted to implement a utility that queries
   the set of available versions for a given package, the following
   program would do the trick:
   .
   > import qualified Distribution.Hackage.DB as DB
   > import Distribution.Text ( display )
   > import System.Environment ( getArgs )
   >
   > main :: IO ()
   > main = do
   >   pkgs <- getArgs
   >   db <- DB.readHackage
   >   let getVersions name = maybe [] DB.keys (DB.lookup name db)
   >   mapM_ (putStrLn . unwords . map display . getVersions) pkgs
   .
   When run, it would produce the following output:
   .
   > ./a.out containers deepseq cabal-install
   > 0.1.0.0 0.1.0.1 0.2.0.0 0.2.0.1 0.3.0.0 0.4.0.0
   > 1.0.0.0 1.1.0.0 1.1.0.1 1.1.0.2
   > 0.4.0 0.5.0 0.5.1 0.5.2 0.6.0 0.6.2 0.6.4 0.8.0 0.8.2 0.10.0 0.10.2

Source-Repository head
  Type:                 git
  Location:             git://github.com/peti/hackage-db.git

Library
  Build-Depends:        base >= 3 && < 5, tar >= 0.4, Cabal, containers,
                        directory, filepath, bytestring, utf8-string
  hs-source-dirs:       src
  Exposed-Modules:      Distribution.Hackage.DB.Unparsed
                        Distribution.Hackage.DB.Parsed
                        Distribution.Hackage.DB.Path
                        Distribution.Hackage.DB