Distribution.Hackage.DB

This module provides simple access to the Hackage database by means of Map. Note that once the database has been parsed, it can be accessed quickly, but the inital cost of reading 00-index.tar is fairly high.

Documentation

type Hackage = Map String (Map Version GenericPackageDescription)

A Map representation of the Hackage database. For sake of simplicity, we use String rather than PackageName to represent the name of a package.

readHackage :: IO Hackage

Read the Hackage database from $HOME/<package database path>/hackage.haskell.org/00-index.tar and return a Map that provides fast access to its contents. That tar file is typically created by running the command "cabal update".

readHackage' :: FilePath -> IO Hackage

Read the Hackage database from the given FilePath and return a Hackage map that provides fast access to its contents.

parseHackage :: ByteString -> Hackage

Parse the contents of Hackage's 00-index.tar into a Hackage map.

module Data.Map

module Data.Version

module Distribution.Package

module Distribution.PackageDescription