    -----------------------------------------------------------------------------
    -- |
    -- Module      :  Distribution.Simple.GHC.IPI642
    -- Copyright   :  (c) The University of Glasgow 2004
    --
    -- Maintainer  :  cabal-devel@haskell.org
    -- Portability :  portable
    --

    {- All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are
    met:

        * Redistributions of source code must retain the above copyright
          notice, this list of conditions and the following disclaimer.

        * Redistributions in binary form must reproduce the above
          copyright notice, this list of conditions and the following
          disclaimer in the documentation and/or other materials provided
          with the distribution.

        * Neither the name of the University nor the names of other
          contributors may be used to endorse or promote products derived
          from this software without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -}

    module Distribution.Simple.GHC.IPI642 (
        InstalledPackageInfo,
        toCurrent,

        -- Don't use these, they're only for conversion purposes
        PackageIdentifier, convertPackageId,
        License, convertLicense,
        convertModuleName
      ) where

    import qualified Distribution.InstalledPackageInfo as Current
    import qualified Distribution.Package as Current hiding (depends)
    import qualified Distribution.License as Current

    import Distribution.Version (Version)
    import Distribution.ModuleName (ModuleName)
    import Distribution.Text (simpleParse)

    import Data.Maybe

    -- | This is the InstalledPackageInfo type used by ghc-6.4.2 and later.
    --
    -- It's here purely for the 'Read' instance so that we can read the package
    -- database used by those ghc versions. It is a little hacky to read the
    -- package db directly, but we do need the info and until ghc-6.9 there was
    -- no better method.
    --
    -- In ghc-6.4.1 and before the format was slightly different.
    -- See "Distribution.Simple.GHC.IPI642"
    --
    data InstalledPackageInfo = InstalledPackageInfo {
        package           :: PackageIdentifier,
        license           :: License,
        copyright         :: String,
        maintainer        :: String,
        author            :: String,
        stability         :: String,
        homepage          :: String,
        pkgUrl            :: String,
        description       :: String,
        category          :: String,
        exposed           :: Bool,
        exposedModules    :: [String],
        hiddenModules     :: [String],
        importDirs        :: [FilePath],
        libraryDirs       :: [FilePath],
        hsLibraries       :: [String],
        extraLibraries    :: [String],
        extraGHCiLibraries:: [String],
        includeDirs       :: [FilePath],
        includes          :: [String],
        depends           :: [PackageIdentifier],
        hugsOptions       :: [String],
        ccOptions         :: [String],
        ldOptions         :: [String],
        frameworkDirs     :: [FilePath],
        frameworks        :: [String],
        haddockInterfaces :: [FilePath],
        haddockHTMLs      :: [FilePath]
      }
      deriving Read

    data PackageIdentifier = PackageIdentifier {
        pkgName    :: String,
        pkgVersion :: Version
      }
      deriving Read

    data License = GPL | LGPL | BSD3 | BSD4
                 | PublicDomain | AllRightsReserved | OtherLicense
      deriving Read

    convertPackageId :: PackageIdentifier -> Current.PackageIdentifier
    convertPackageId PackageIdentifier { pkgName = n, pkgVersion = v } =
      Current.PackageIdentifier (Current.PackageName n) v

    convertModuleName :: String -> ModuleName
    convertModuleName s = fromJust $ simpleParse s

    convertLicense :: License -> Current.License
    convertLicense GPL  = Current.GPL
    convertLicense LGPL = Current.LGPL
    convertLicense BSD3 = Current.BSD3
    convertLicense BSD4 = Current.BSD4
    convertLicense PublicDomain = Current.PublicDomain
    convertLicense AllRightsReserved = Current.AllRightsReserved
    convertLicense OtherLicense = Current.OtherLicense

    toCurrent :: InstalledPackageInfo -> Current.InstalledPackageInfo
    toCurrent ipi@InstalledPackageInfo{} = Current.InstalledPackageInfo {
        Current.package            = convertPackageId (package ipi),
        Current.license            = convertLicense (license ipi),
        Current.copyright          = copyright ipi,
        Current.maintainer         = maintainer ipi,
        Current.author             = author ipi,
        Current.stability          = stability ipi,
        Current.homepage           = homepage ipi,
        Current.pkgUrl             = pkgUrl ipi,
        Current.description        = description ipi,
        Current.category           = category ipi,
        Current.exposed            = exposed ipi,
        Current.exposedModules     = map convertModuleName (exposedModules ipi),
        Current.hiddenModules      = map convertModuleName (hiddenModules ipi),
        Current.importDirs         = importDirs ipi,
        Current.libraryDirs        = libraryDirs ipi,
        Current.hsLibraries        = hsLibraries ipi,
        Current.extraLibraries     = extraLibraries ipi,
        Current.extraGHCiLibraries = extraGHCiLibraries ipi,
        Current.includeDirs        = includeDirs ipi,
        Current.includes           = includes ipi,
        Current.depends            = map convertPackageId (depends ipi),
        Current.hugsOptions        = hugsOptions ipi,
        Current.ccOptions          = ccOptions ipi,
        Current.ldOptions          = ldOptions ipi,
        Current.frameworkDirs      = frameworkDirs ipi,
        Current.frameworks         = frameworks ipi,
        Current.haddockInterfaces  = haddockInterfaces ipi,
        Current.haddockHTMLs       = haddockHTMLs ipi
      }