-----------------------------------------------------------------------------
-- |
-- Module      :  Distribution.Simple.Install
-- Copyright   :  Isaac Jones 2003-2004
--
-- Maintainer  :  cabal-devel@haskell.org
-- Portability :  portable
--
-- This is the entry point into installing a built package. Performs the
-- \"@.\/setup install@\" and \"@.\/setup copy@\" actions. It moves files into
-- place based on the prefix argument. It does the generic bits and then calls
-- compiler-specific functions to do the rest.

{- 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 Isaac Jones 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,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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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.Install (
        install,
  ) where

import Distribution.PackageDescription (
        PackageDescription(..), BuildInfo(..), Library(..),
        hasLibs, withLib, hasExes, withExe )
import Distribution.Package (Package(..))
import Distribution.Simple.LocalBuildInfo (
        LocalBuildInfo(..), InstallDirs(..), absoluteInstallDirs,
        substPathTemplate, withLibLBI)
import Distribution.Simple.BuildPaths (haddockName, haddockPref)
import Distribution.Simple.Utils
         ( createDirectoryIfMissingVerbose
         , installDirectoryContents, installOrdinaryFile, isInSearchPath
         , die, info, notice, warn, matchDirFileGlob )
import Distribution.Simple.Compiler
         ( CompilerFlavor(..), compilerFlavor )
import Distribution.Simple.Setup (CopyFlags(..), CopyDest(..), fromFlag)

import qualified Distribution.Simple.GHC  as GHC
import qualified Distribution.Simple.NHC  as NHC
import qualified Distribution.Simple.JHC  as JHC
import qualified Distribution.Simple.LHC  as LHC
import qualified Distribution.Simple.Hugs as Hugs
import qualified Distribution.Simple.UHC  as UHC

import Control.Monad (when, unless)
import System.Directory
         ( doesDirectoryExist, doesFileExist )
import System.FilePath
         ( takeFileName, takeDirectory, (</>), isAbsolute )

import Distribution.Verbosity
import Distribution.Text
         ( display )

-- |Perform the \"@.\/setup install@\" and \"@.\/setup copy@\"
-- actions.  Move files into place based on the prefix argument.  FIX:
-- nhc isn't implemented yet.

install :: PackageDescription -- ^information from the .cabal file
        -> LocalBuildInfo -- ^information from the configure step
        -> CopyFlags -- ^flags sent to copy or install
        -> IO ()
install pkg_descr lbi flags = do
  let distPref  = fromFlag (copyDistPref flags)
      verbosity = fromFlag (copyVerbosity flags)
      copydest  = fromFlag (copyDest flags)
      installDirs@(InstallDirs {
         bindir     = binPref,
         libdir     = libPref,
--         dynlibdir  = dynlibPref, --see TODO below
         datadir    = dataPref,
         progdir    = progPref,
         docdir     = docPref,
         htmldir    = htmlPref,
         haddockdir = interfacePref,
         includedir = incPref})
             = absoluteInstallDirs pkg_descr lbi copydest

      --TODO: decide if we need the user to be able to control the libdir
      -- for shared libs independently of the one for static libs. If so
      -- it should also have a flag in the command line UI
      -- For the moment use dynlibdir = libdir
      dynlibPref = libPref
      progPrefixPref = substPathTemplate (packageId pkg_descr) lbi (progPrefix lbi)
      progSuffixPref = substPathTemplate (packageId pkg_descr) lbi (progSuffix lbi)

  docExists <- doesDirectoryExist $ haddockPref distPref pkg_descr
  info verbosity ("directory " ++ haddockPref distPref pkg_descr ++
                  " does exist: " ++ show docExists)

  installDataFiles verbosity pkg_descr dataPref

  when docExists $ do
      createDirectoryIfMissingVerbose verbosity True htmlPref
      installDirectoryContents verbosity
          (haddockPref distPref pkg_descr) htmlPref
      -- setPermissionsRecursive [Read] htmlPref
      -- The haddock interface file actually already got installed
      -- in the recursive copy, but now we install it where we actually
      -- want it to be (normally the same place). We could remove the
      -- copy in htmlPref first.
      let haddockInterfaceFileSrc  = haddockPref distPref pkg_descr
                                                   </> haddockName pkg_descr
          haddockInterfaceFileDest = interfacePref </> haddockName pkg_descr
      -- We only generate the haddock interface file for libs, So if the
      -- package consists only of executables there will not be one:
      exists <- doesFileExist haddockInterfaceFileSrc
      when exists $ do
        createDirectoryIfMissingVerbose verbosity True interfacePref
        installOrdinaryFile verbosity haddockInterfaceFileSrc
                                      haddockInterfaceFileDest

  let lfile = licenseFile pkg_descr
  unless (null lfile) $ do
    createDirectoryIfMissingVerbose verbosity True docPref
    installOrdinaryFile verbosity lfile (docPref </> takeFileName lfile)

  let buildPref = buildDir lbi
  when (hasLibs pkg_descr) $
    notice verbosity ("Installing library in " ++ libPref)
  when (hasExes pkg_descr) $ do
    notice verbosity ("Installing executable(s) in " ++ binPref)
    inPath <- isInSearchPath binPref
    when (not inPath) $
      warn verbosity ("The directory " ++ binPref
                      ++ " is not in the system search path.")

  -- install include files for all compilers - they may be needed to compile
  -- haskell files (using the CPP extension)
  when (hasLibs pkg_descr) $ installIncludeFiles verbosity pkg_descr incPref

  case compilerFlavor (compiler lbi) of
     GHC  -> do withLibLBI pkg_descr lbi $
                  GHC.installLib verbosity lbi libPref dynlibPref buildPref pkg_descr
                withExe pkg_descr $
                  GHC.installExe verbosity lbi installDirs buildPref (progPrefixPref, progSuffixPref) pkg_descr
     LHC  -> do withLibLBI pkg_descr lbi $
                  LHC.installLib verbosity lbi libPref dynlibPref buildPref pkg_descr
                withExe pkg_descr $
                  LHC.installExe verbosity lbi installDirs buildPref (progPrefixPref, progSuffixPref) pkg_descr
     JHC  -> do withLib pkg_descr $
                  JHC.installLib verbosity libPref buildPref pkg_descr
                withExe pkg_descr $
                  JHC.installExe verbosity binPref buildPref (progPrefixPref, progSuffixPref) pkg_descr
     Hugs -> do
       let targetProgPref = progdir (absoluteInstallDirs pkg_descr lbi NoCopyDest)
       let scratchPref = scratchDir lbi
       Hugs.install verbosity lbi libPref progPref binPref targetProgPref scratchPref (progPrefixPref, progSuffixPref) pkg_descr
     NHC  -> do withLibLBI pkg_descr lbi $ NHC.installLib verbosity libPref buildPref (packageId pkg_descr)
                withExe pkg_descr $ NHC.installExe verbosity binPref buildPref (progPrefixPref, progSuffixPref)
     UHC  -> do withLib pkg_descr $ UHC.installLib verbosity lbi libPref dynlibPref buildPref pkg_descr
     _    -> die $ "installing with "
                ++ display (compilerFlavor (compiler lbi))
                ++ " is not implemented"
  -- register step should be performed by caller.

-- | Install the files listed in data-files
--
installDataFiles :: Verbosity -> PackageDescription -> FilePath -> IO ()
installDataFiles verbosity pkg_descr destDataDir =
  flip mapM_ (dataFiles pkg_descr) $ \ file -> do
    let srcDataDir = dataDir pkg_descr
    files <- matchDirFileGlob srcDataDir file
    let dir = takeDirectory file
    createDirectoryIfMissingVerbose verbosity True (destDataDir </> dir)
    sequence_ [ installOrdinaryFile verbosity (srcDataDir  </> file')
                                              (destDataDir </> file')
              | file' <- files ]

-- | Install the files listed in install-includes
--
installIncludeFiles :: Verbosity -> PackageDescription -> FilePath -> IO ()
installIncludeFiles verbosity
  PackageDescription { library = Just lib } destIncludeDir = do

  incs <- mapM (findInc relincdirs) (installIncludes lbi)
  sequence_
    [ do createDirectoryIfMissingVerbose verbosity True destDir
         installOrdinaryFile verbosity srcFile destFile
    | (relFile, srcFile) <- incs
    , let destFile = destIncludeDir </> relFile
          destDir  = takeDirectory destFile ]
  where
   relincdirs = "." : filter (not.isAbsolute) (includeDirs lbi)
   lbi = libBuildInfo lib

   findInc []         file = die ("can't find include file " ++ file)
   findInc (dir:dirs) file = do
     let path = dir </> file
     exists <- doesFileExist path
     if exists then return (file, path) else findInc dirs file
installIncludeFiles _ _ _ = die "installIncludeFiles: Can't happen?"
