    {-# LANGUAGE DeriveGeneric #-}
    {-# LANGUAGE FlexibleContexts #-}
    {-# LANGUAGE RankNTypes #-}

    -----------------------------------------------------------------------------
    -- |
    -- Module      :  Distribution.Simple.LocalBuildInfo
    -- Copyright   :  Isaac Jones 2003-2004
    -- License     :  BSD3
    --
    -- Maintainer  :  cabal-devel@haskell.org
    -- Portability :  portable
    --
    -- Once a package has been configured we have resolved conditionals and
    -- dependencies, configured the compiler and other needed external programs.
    -- The 'LocalBuildInfo' is used to hold all this information. It holds the
    -- install dirs, the compiler, the exact package dependencies, the configured
    -- programs, the package database to use and a bunch of miscellaneous configure
    -- flags. It gets saved and reloaded from a file (@dist\/setup-config@). It gets
    -- passed in to very many subsequent build actions.

    module Distribution.Simple.LocalBuildInfo (
            LocalBuildInfo(..),
            localComponentId,
            localUnitId,
            localCompatPackageKey,

            -- * Buildable package components
            Component(..),
            ComponentName(..),
            LibraryName(..),
            defaultLibName,
            showComponentName,
            componentNameString,
            ComponentLocalBuildInfo(..),
            componentBuildDir,
            foldComponent,
            componentName,
            componentBuildInfo,
            componentBuildable,
            pkgComponents,
            pkgBuildableComponents,
            lookupComponent,
            getComponent,
            allComponentsInBuildOrder,
            depLibraryPaths,
            allLibModules,

            withAllComponentsInBuildOrder,
            withLibLBI,
            withExeLBI,
            withBenchLBI,
            withTestLBI,
            enabledTestLBIs,
            enabledBenchLBIs,

            -- * Installation directories
            module Distribution.Simple.InstallDirs,
            absoluteInstallDirs, prefixRelativeInstallDirs,
            absoluteInstallCommandDirs,
            absoluteComponentInstallDirs, prefixRelativeComponentInstallDirs,
            substPathTemplate,
      ) where

    import Prelude ()
    import Distribution.Compat.Prelude

    import Distribution.Types.Component
    import Distribution.Types.PackageId
    import Distribution.Types.UnitId
    import Distribution.Types.ComponentName
    import Distribution.Types.UnqualComponentName
    import Distribution.Types.PackageDescription
    import Distribution.Types.ComponentLocalBuildInfo
    import Distribution.Types.LocalBuildInfo
    import Distribution.Types.TargetInfo

    import Distribution.Simple.InstallDirs hiding (absoluteInstallDirs,
                                                   prefixRelativeInstallDirs,
                                                   substPathTemplate, )
    import qualified Distribution.Simple.InstallDirs as InstallDirs
    import Distribution.PackageDescription
    import qualified Distribution.InstalledPackageInfo as Installed
    import Distribution.Package
    import Distribution.ModuleName
    import Distribution.Simple.Compiler
    import Distribution.Simple.PackageIndex
    import Distribution.Simple.Utils
    import Distribution.Pretty
    import qualified Distribution.Compat.Graph as Graph

    import Data.List (stripPrefix)
    import System.FilePath

    import System.Directory (doesDirectoryExist, canonicalizePath)

    -- -----------------------------------------------------------------------------
    -- Configuration information of buildable components

    componentBuildDir :: LocalBuildInfo -> ComponentLocalBuildInfo -> FilePath
    -- For now, we assume that libraries/executables/test-suites/benchmarks
    -- are only ever built once.  With Backpack, we need a special case for
    -- libraries so that we can handle building them multiple times.
    componentBuildDir :: LocalBuildInfo -> ComponentLocalBuildInfo -> String
    componentBuildDir LocalBuildInfo
    lbi ComponentLocalBuildInfo
    clbi
        = LocalBuildInfo -> String
    buildDir LocalBuildInfo
    lbi String -> String -> String
    </>
            case ComponentLocalBuildInfo -> ComponentName
    componentLocalName ComponentLocalBuildInfo
    clbi of
                CLibName LibraryName
    LMainLibName ->
                    if UnitId -> String
    forall a. Pretty a => a -> String
    prettyShow (ComponentLocalBuildInfo -> UnitId
    componentUnitId ComponentLocalBuildInfo
    clbi) String -> String -> Bool
    forall a. Eq a => a -> a -> Bool
    == ComponentId -> String
    forall a. Pretty a => a -> String
    prettyShow (ComponentLocalBuildInfo -> ComponentId
    componentComponentId ComponentLocalBuildInfo
    clbi)
                        then String
    ""
                        else UnitId -> String
    forall a. Pretty a => a -> String
    prettyShow (ComponentLocalBuildInfo -> UnitId
    componentUnitId ComponentLocalBuildInfo
    clbi)
                CLibName (LSubLibName UnqualComponentName
    s) ->
                    if UnitId -> String
    forall a. Pretty a => a -> String
    prettyShow (ComponentLocalBuildInfo -> UnitId
    componentUnitId ComponentLocalBuildInfo
    clbi) String -> String -> Bool
    forall a. Eq a => a -> a -> Bool
    == ComponentId -> String
    forall a. Pretty a => a -> String
    prettyShow (ComponentLocalBuildInfo -> ComponentId
    componentComponentId ComponentLocalBuildInfo
    clbi)
                        then UnqualComponentName -> String
    unUnqualComponentName UnqualComponentName
    s
                        else UnitId -> String
    forall a. Pretty a => a -> String
    prettyShow (ComponentLocalBuildInfo -> UnitId
    componentUnitId ComponentLocalBuildInfo
    clbi)
                CFLibName UnqualComponentName
    s  -> UnqualComponentName -> String
    unUnqualComponentName UnqualComponentName
    s
                CExeName UnqualComponentName
    s   -> UnqualComponentName -> String
    unUnqualComponentName UnqualComponentName
    s
                CTestName UnqualComponentName
    s  -> UnqualComponentName -> String
    unUnqualComponentName UnqualComponentName
    s
                CBenchName UnqualComponentName
    s -> UnqualComponentName -> String
    unUnqualComponentName UnqualComponentName
    s

    -- | Perform the action on each enabled 'library' in the package
    -- description with the 'ComponentLocalBuildInfo'.
    withLibLBI :: PackageDescription -> LocalBuildInfo
               -> (Library -> ComponentLocalBuildInfo -> IO ()) -> IO ()
    withLibLBI :: PackageDescription
    -> LocalBuildInfo
    -> (Library -> ComponentLocalBuildInfo -> IO ())
    -> IO ()
    withLibLBI PackageDescription
    pkg LocalBuildInfo
    lbi Library -> ComponentLocalBuildInfo -> IO ()
    f =
        PackageDescription
    -> LocalBuildInfo -> (TargetInfo -> IO ()) -> IO ()
    withAllTargetsInBuildOrder' PackageDescription
    pkg LocalBuildInfo
    lbi ((TargetInfo -> IO ()) -> IO ()) -> (TargetInfo -> IO ()) -> IO ()
    forall a b. (a -> b) -> a -> b
    $ \TargetInfo
    target ->
            case TargetInfo -> Component
    targetComponent TargetInfo
    target of
                CLib Library
    lib -> Library -> ComponentLocalBuildInfo -> IO ()
    f Library
    lib (TargetInfo -> ComponentLocalBuildInfo
    targetCLBI TargetInfo
    target)
                Component
    _ -> () -> IO ()
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()

    -- | Perform the action on each enabled 'Executable' in the package
    -- description.  Extended version of 'withExe' that also gives corresponding
    -- build info.
    withExeLBI :: PackageDescription -> LocalBuildInfo
               -> (Executable -> ComponentLocalBuildInfo -> IO ()) -> IO ()
    withExeLBI :: PackageDescription
    -> LocalBuildInfo
    -> (Executable -> ComponentLocalBuildInfo -> IO ())
    -> IO ()
    withExeLBI PackageDescription
    pkg LocalBuildInfo
    lbi Executable -> ComponentLocalBuildInfo -> IO ()
    f =
        PackageDescription
    -> LocalBuildInfo -> (TargetInfo -> IO ()) -> IO ()
    withAllTargetsInBuildOrder' PackageDescription
    pkg LocalBuildInfo
    lbi ((TargetInfo -> IO ()) -> IO ()) -> (TargetInfo -> IO ()) -> IO ()
    forall a b. (a -> b) -> a -> b
    $ \TargetInfo
    target ->
            case TargetInfo -> Component
    targetComponent TargetInfo
    target of
                CExe Executable
    exe -> Executable -> ComponentLocalBuildInfo -> IO ()
    f Executable
    exe (TargetInfo -> ComponentLocalBuildInfo
    targetCLBI TargetInfo
    target)
                Component
    _ -> () -> IO ()
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()

    -- | Perform the action on each enabled 'Benchmark' in the package
    -- description.
    withBenchLBI :: PackageDescription -> LocalBuildInfo
                -> (Benchmark -> ComponentLocalBuildInfo -> IO ()) -> IO ()
    withBenchLBI :: PackageDescription
    -> LocalBuildInfo
    -> (Benchmark -> ComponentLocalBuildInfo -> IO ())
    -> IO ()
    withBenchLBI PackageDescription
    pkg LocalBuildInfo
    lbi Benchmark -> ComponentLocalBuildInfo -> IO ()
    f =
        [IO ()] -> IO ()
    forall (t :: * -> *) (m :: * -> *) a.
    (Foldable t, Monad m) =>
    t (m a) -> m ()
    sequence_ [ Benchmark -> ComponentLocalBuildInfo -> IO ()
    f Benchmark
    bench ComponentLocalBuildInfo
    clbi | (Benchmark
    bench, ComponentLocalBuildInfo
    clbi) <- PackageDescription
    -> LocalBuildInfo -> [(Benchmark, ComponentLocalBuildInfo)]
    enabledBenchLBIs PackageDescription
    pkg LocalBuildInfo
    lbi ]

    withTestLBI :: PackageDescription -> LocalBuildInfo
                -> (TestSuite -> ComponentLocalBuildInfo -> IO ()) -> IO ()
    withTestLBI :: PackageDescription
    -> LocalBuildInfo
    -> (TestSuite -> ComponentLocalBuildInfo -> IO ())
    -> IO ()
    withTestLBI PackageDescription
    pkg LocalBuildInfo
    lbi TestSuite -> ComponentLocalBuildInfo -> IO ()
    f =
        [IO ()] -> IO ()
    forall (t :: * -> *) (m :: * -> *) a.
    (Foldable t, Monad m) =>
    t (m a) -> m ()
    sequence_ [ TestSuite -> ComponentLocalBuildInfo -> IO ()
    f TestSuite
    test ComponentLocalBuildInfo
    clbi | (TestSuite
    test, ComponentLocalBuildInfo
    clbi) <- PackageDescription
    -> LocalBuildInfo -> [(TestSuite, ComponentLocalBuildInfo)]
    enabledTestLBIs PackageDescription
    pkg LocalBuildInfo
    lbi ]

    enabledTestLBIs :: PackageDescription -> LocalBuildInfo
                 -> [(TestSuite, ComponentLocalBuildInfo)]
    enabledTestLBIs :: PackageDescription
    -> LocalBuildInfo -> [(TestSuite, ComponentLocalBuildInfo)]
    enabledTestLBIs PackageDescription
    pkg LocalBuildInfo
    lbi =
        [ (TestSuite
    test, TargetInfo -> ComponentLocalBuildInfo
    targetCLBI TargetInfo
    target)
        | TargetInfo
    target <- PackageDescription -> LocalBuildInfo -> [TargetInfo]
    allTargetsInBuildOrder' PackageDescription
    pkg LocalBuildInfo
    lbi
        , CTest TestSuite
    test <- [TargetInfo -> Component
    targetComponent TargetInfo
    target] ]

    enabledBenchLBIs :: PackageDescription -> LocalBuildInfo
                 -> [(Benchmark, ComponentLocalBuildInfo)]
    enabledBenchLBIs :: PackageDescription
    -> LocalBuildInfo -> [(Benchmark, ComponentLocalBuildInfo)]
    enabledBenchLBIs PackageDescription
    pkg LocalBuildInfo
    lbi =
        [ (Benchmark
    bench, TargetInfo -> ComponentLocalBuildInfo
    targetCLBI TargetInfo
    target)
        | TargetInfo
    target <- PackageDescription -> LocalBuildInfo -> [TargetInfo]
    allTargetsInBuildOrder' PackageDescription
    pkg LocalBuildInfo
    lbi
        , CBench Benchmark
    bench <- [TargetInfo -> Component
    targetComponent TargetInfo
    target] ]

    -- | Perform the action on each buildable 'Library' or 'Executable' (Component)
    -- in the PackageDescription, subject to the build order specified by the
    -- 'compBuildOrder' field of the given 'LocalBuildInfo'
    withAllComponentsInBuildOrder :: PackageDescription -> LocalBuildInfo
                                  -> (Component -> ComponentLocalBuildInfo -> IO ())
                                  -> IO ()
    withAllComponentsInBuildOrder :: PackageDescription
    -> LocalBuildInfo
    -> (Component -> ComponentLocalBuildInfo -> IO ())
    -> IO ()
    withAllComponentsInBuildOrder PackageDescription
    pkg LocalBuildInfo
    lbi Component -> ComponentLocalBuildInfo -> IO ()
    f =
        PackageDescription
    -> LocalBuildInfo -> (TargetInfo -> IO ()) -> IO ()
    withAllTargetsInBuildOrder' PackageDescription
    pkg LocalBuildInfo
    lbi ((TargetInfo -> IO ()) -> IO ()) -> (TargetInfo -> IO ()) -> IO ()
    forall a b. (a -> b) -> a -> b
    $ \TargetInfo
    target ->
            Component -> ComponentLocalBuildInfo -> IO ()
    f (TargetInfo -> Component
    targetComponent TargetInfo
    target) (TargetInfo -> ComponentLocalBuildInfo
    targetCLBI TargetInfo
    target)

    allComponentsInBuildOrder :: LocalBuildInfo
                              -> [ComponentLocalBuildInfo]
    allComponentsInBuildOrder :: LocalBuildInfo -> [ComponentLocalBuildInfo]
    allComponentsInBuildOrder LocalBuildInfo
    lbi =
        Graph ComponentLocalBuildInfo -> [ComponentLocalBuildInfo]
    forall a. Graph a -> [a]
    Graph.topSort (LocalBuildInfo -> Graph ComponentLocalBuildInfo
    componentGraph LocalBuildInfo
    lbi)

    -- -----------------------------------------------------------------------------
    -- A random function that has no business in this module

    -- | Determine the directories containing the dynamic libraries of the
    -- transitive dependencies of the component we are building.
    --
    -- When wanted, and possible, returns paths relative to the installDirs 'prefix'
    depLibraryPaths :: Bool -- ^ Building for inplace?
                    -> Bool -- ^ Generate prefix-relative library paths
                    -> LocalBuildInfo
                    -> ComponentLocalBuildInfo -- ^ Component that is being built
                    -> IO [FilePath]
    depLibraryPaths :: Bool
    -> Bool -> LocalBuildInfo -> ComponentLocalBuildInfo -> IO [String]
    depLibraryPaths Bool
    inplace Bool
    relative LocalBuildInfo
    lbi ComponentLocalBuildInfo
    clbi = do
        let pkgDescr :: PackageDescription
    pkgDescr    = LocalBuildInfo -> PackageDescription
    localPkgDescr LocalBuildInfo
    lbi
            installDirs :: InstallDirs String
    installDirs = PackageDescription
    -> LocalBuildInfo -> UnitId -> CopyDest -> InstallDirs String
    absoluteComponentInstallDirs PackageDescription
    pkgDescr LocalBuildInfo
    lbi (ComponentLocalBuildInfo -> UnitId
    componentUnitId ComponentLocalBuildInfo
    clbi) CopyDest
    NoCopyDest
            executable :: Bool
    executable  = case ComponentLocalBuildInfo
    clbi of
                            ExeComponentLocalBuildInfo {} -> Bool
    True
                            ComponentLocalBuildInfo
    _                             -> Bool
    False
            relDir :: String
    relDir | Bool
    executable = InstallDirs String -> String
    forall dir. InstallDirs dir -> dir
    bindir InstallDirs String
    installDirs
                   | Bool
    otherwise  = InstallDirs String -> String
    forall dir. InstallDirs dir -> dir
    libdir InstallDirs String
    installDirs

        let -- TODO: this is kind of inefficient
            internalDeps :: [UnitId]
    internalDeps = [ UnitId
    uid
                           | (UnitId
    uid, MungedPackageId
    _) <- ComponentLocalBuildInfo -> [(UnitId, MungedPackageId)]
    componentPackageDeps ComponentLocalBuildInfo
    clbi
                           -- Test that it's internal
                           , TargetInfo
    sub_target <- PackageDescription -> LocalBuildInfo -> [TargetInfo]
    allTargetsInBuildOrder' PackageDescription
    pkgDescr LocalBuildInfo
    lbi
                           , ComponentLocalBuildInfo -> UnitId
    componentUnitId (TargetInfo -> ComponentLocalBuildInfo
    targetCLBI (TargetInfo
    sub_target)) UnitId -> UnitId -> Bool
    forall a. Eq a => a -> a -> Bool
    == UnitId
    uid ]
            internalLibs :: [String]
    internalLibs = [ ComponentLocalBuildInfo -> String
    getLibDir (TargetInfo -> ComponentLocalBuildInfo
    targetCLBI TargetInfo
    sub_target)
                           | TargetInfo
    sub_target <- PackageDescription -> LocalBuildInfo -> [UnitId] -> [TargetInfo]
    neededTargetsInBuildOrder'
                                            PackageDescription
    pkgDescr LocalBuildInfo
    lbi [UnitId]
    internalDeps ]
        {-
        -- This is better, but it doesn't work, because we may be passed a
        -- CLBI which doesn't actually exist, and was faked up when we
        -- were building a test suite/benchmark.  See #3599 for proposal
        -- to fix this.
        let internalCLBIs = filter ((/= componentUnitId clbi) . componentUnitId)
                          . map targetCLBI
                          $ neededTargetsInBuildOrder lbi [componentUnitId clbi]
            internalLibs = map getLibDir internalCLBIs
        -}
            getLibDir :: ComponentLocalBuildInfo -> String
    getLibDir ComponentLocalBuildInfo
    sub_clbi
              | Bool
    inplace    = LocalBuildInfo -> ComponentLocalBuildInfo -> String
    componentBuildDir LocalBuildInfo
    lbi ComponentLocalBuildInfo
    sub_clbi
              | Bool
    otherwise  = InstallDirs String -> String
    forall dir. InstallDirs dir -> dir
    dynlibdir (PackageDescription
    -> LocalBuildInfo -> UnitId -> CopyDest -> InstallDirs String
    absoluteComponentInstallDirs PackageDescription
    pkgDescr LocalBuildInfo
    lbi (ComponentLocalBuildInfo -> UnitId
    componentUnitId ComponentLocalBuildInfo
    sub_clbi) CopyDest
    NoCopyDest)

        -- Why do we go through all the trouble of a hand-crafting
        -- internalLibs, when 'installedPkgs' actually contains the
        -- internal libraries?  The trouble is that 'installedPkgs'
        -- may contain *inplace* entries, which we must NOT use for
        -- not inplace 'depLibraryPaths' (e.g., for RPATH calculation).
        -- See #4025 for more details. This is all horrible but it
        -- is a moot point if you are using a per-component build,
        -- because you never have any internal libraries in this case;
        -- they're all external.
        let external_ipkgs :: [InstalledPackageInfo]
    external_ipkgs = (InstalledPackageInfo -> Bool)
    -> [InstalledPackageInfo] -> [InstalledPackageInfo]
    forall a. (a -> Bool) -> [a] -> [a]
    filter InstalledPackageInfo -> Bool
    forall {pkg}. HasUnitId pkg => pkg -> Bool
    is_external (PackageIndex InstalledPackageInfo -> [InstalledPackageInfo]
    forall a. PackageIndex a -> [a]
    allPackages (LocalBuildInfo -> PackageIndex InstalledPackageInfo
    installedPkgs LocalBuildInfo
    lbi))
            is_external :: pkg -> Bool
    is_external pkg
    ipkg = Bool -> Bool
    not (pkg -> UnitId
    forall pkg. HasUnitId pkg => pkg -> UnitId
    installedUnitId pkg
    ipkg UnitId -> [UnitId] -> Bool
    forall a. Eq a => a -> [a] -> Bool
    forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
    `elem` [UnitId]
    internalDeps)
            -- First look for dynamic libraries in `dynamic-library-dirs`, and use
            -- `library-dirs` as a fall back.
            getDynDir :: InstalledPackageInfo -> [String]
    getDynDir InstalledPackageInfo
    pkg  = case InstalledPackageInfo -> [String]
    Installed.libraryDynDirs InstalledPackageInfo
    pkg of
                               [] -> InstalledPackageInfo -> [String]
    Installed.libraryDirs InstalledPackageInfo
    pkg
                               [String]
    d  -> [String]
    d
            allDepLibDirs :: [String]
    allDepLibDirs  = (InstalledPackageInfo -> [String])
    -> [InstalledPackageInfo] -> [String]
    forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
    concatMap InstalledPackageInfo -> [String]
    getDynDir [InstalledPackageInfo]
    external_ipkgs

            allDepLibDirs' :: [String]
    allDepLibDirs' = [String]
    internalLibs [String] -> [String] -> [String]
    forall a. [a] -> [a] -> [a]
    ++ [String]
    allDepLibDirs
        [String]
    allDepLibDirsC <- (String -> IO String) -> [String] -> IO [String]
    forall (t :: * -> *) (f :: * -> *) a b.
    (Traversable t, Applicative f) =>
    (a -> f b) -> t a -> f (t b)
    forall (f :: * -> *) a b.
    Applicative f =>
    (a -> f b) -> [a] -> f [b]
    traverse String -> IO String
    canonicalizePathNoFail [String]
    allDepLibDirs'

        let p :: String
    p                = InstallDirs String -> String
    forall dir. InstallDirs dir -> dir
    prefix InstallDirs String
    installDirs
            prefixRelative :: String -> Bool
    prefixRelative String
    l = Maybe String -> Bool
    forall a. Maybe a -> Bool
    isJust (String -> String -> Maybe String
    forall a. Eq a => [a] -> [a] -> Maybe [a]
    stripPrefix String
    p String
    l)
            libPaths :: [String]
    libPaths
              | Bool
    relative Bool -> Bool -> Bool
    &&
                String -> Bool
    prefixRelative String
    relDir = (String -> String) -> [String] -> [String]
    forall a b. (a -> b) -> [a] -> [b]
    map (\String
    l ->
                                              if String -> Bool
    prefixRelative String
    l
                                                 then String -> String -> String
    shortRelativePath String
    relDir String
    l
                                                 else String
    l
                                            ) [String]
    allDepLibDirsC
              | Bool
    otherwise             = [String]
    allDepLibDirsC

        [String] -> IO [String]
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return [String]
    libPaths
      where
        -- 'canonicalizePath' fails on UNIX when the directory does not exists.
        -- So just don't canonicalize when it doesn't exist.
        canonicalizePathNoFail :: String -> IO String
    canonicalizePathNoFail String
    p = do
          Bool
    exists <- String -> IO Bool
    doesDirectoryExist String
    p
          if Bool
    exists
             then String -> IO String
    canonicalizePath String
    p
             else String -> IO String
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return String
    p

    -- | Get all module names that needed to be built by GHC; i.e., all
    -- of these 'ModuleName's have interface files associated with them
    -- that need to be installed.
    allLibModules :: Library -> ComponentLocalBuildInfo -> [ModuleName]
    allLibModules :: Library -> ComponentLocalBuildInfo -> [ModuleName]
    allLibModules Library
    lib ComponentLocalBuildInfo
    clbi =
        [ModuleName] -> [ModuleName]
    forall a. Ord a => [a] -> [a]
    ordNub ([ModuleName] -> [ModuleName]) -> [ModuleName] -> [ModuleName]
    forall a b. (a -> b) -> a -> b
    $
        Library -> [ModuleName]
    explicitLibModules Library
    lib [ModuleName] -> [ModuleName] -> [ModuleName]
    forall a. [a] -> [a] -> [a]
    ++
        case ComponentLocalBuildInfo
    clbi of
            LibComponentLocalBuildInfo { componentInstantiatedWith :: ComponentLocalBuildInfo -> [(ModuleName, OpenModule)]
    componentInstantiatedWith = [(ModuleName, OpenModule)]
    insts } -> ((ModuleName, OpenModule) -> ModuleName)
    -> [(ModuleName, OpenModule)] -> [ModuleName]
    forall a b. (a -> b) -> [a] -> [b]
    map (ModuleName, OpenModule) -> ModuleName
    forall a b. (a, b) -> a
    fst [(ModuleName, OpenModule)]
    insts
            ComponentLocalBuildInfo
    _ -> []

    -- -----------------------------------------------------------------------------
    -- Wrappers for a couple functions from InstallDirs

    -- | Backwards compatibility function which computes the InstallDirs
    -- assuming that @$libname@ points to the public library (or some fake
    -- package identifier if there is no public library.)  IF AT ALL
    -- POSSIBLE, please use 'absoluteComponentInstallDirs' instead.
    absoluteInstallDirs :: PackageDescription -> LocalBuildInfo
                        -> CopyDest
                        -> InstallDirs FilePath
    absoluteInstallDirs :: PackageDescription
    -> LocalBuildInfo -> CopyDest -> InstallDirs String
    absoluteInstallDirs PackageDescription
    pkg LocalBuildInfo
    lbi CopyDest
    copydest =
        PackageDescription
    -> LocalBuildInfo -> UnitId -> CopyDest -> InstallDirs String
    absoluteComponentInstallDirs PackageDescription
    pkg LocalBuildInfo
    lbi (LocalBuildInfo -> UnitId
    localUnitId LocalBuildInfo
    lbi) CopyDest
    copydest

    -- | See 'InstallDirs.absoluteInstallDirs'.
    absoluteComponentInstallDirs :: PackageDescription -> LocalBuildInfo
                                 -> UnitId
                                 -> CopyDest
                                 -> InstallDirs FilePath
    absoluteComponentInstallDirs :: PackageDescription
    -> LocalBuildInfo -> UnitId -> CopyDest -> InstallDirs String
    absoluteComponentInstallDirs PackageDescription
    pkg LocalBuildInfo
    lbi UnitId
    uid CopyDest
    copydest =
      PackageId
    -> UnitId
    -> CompilerInfo
    -> CopyDest
    -> Platform
    -> InstallDirs PathTemplate
    -> InstallDirs String
    InstallDirs.absoluteInstallDirs
        (PackageDescription -> PackageId
    forall pkg. Package pkg => pkg -> PackageId
    packageId PackageDescription
    pkg)
        UnitId
    uid
        (Compiler -> CompilerInfo
    compilerInfo (LocalBuildInfo -> Compiler
    compiler LocalBuildInfo
    lbi))
        CopyDest
    copydest
        (LocalBuildInfo -> Platform
    hostPlatform LocalBuildInfo
    lbi)
        (LocalBuildInfo -> InstallDirs PathTemplate
    installDirTemplates LocalBuildInfo
    lbi)

    absoluteInstallCommandDirs :: PackageDescription -> LocalBuildInfo
                               -> UnitId
                               -> CopyDest
                               -> InstallDirs FilePath
    absoluteInstallCommandDirs :: PackageDescription
    -> LocalBuildInfo -> UnitId -> CopyDest -> InstallDirs String
    absoluteInstallCommandDirs PackageDescription
    pkg LocalBuildInfo
    lbi UnitId
    uid CopyDest
    copydest =
      InstallDirs String
    dirs {
        -- Handle files which are not
        -- per-component (data files and Haddock files.)
        datadir    = datadir    dirs',
        -- NB: The situation with Haddock is a bit delicate.  On the
        -- one hand, the easiest to understand Haddock documentation
        -- path is pkgname-0.1, which means it's per-package (not
        -- per-component).  But this means that it's impossible to
        -- install Haddock documentation for internal libraries.  We'll
        -- keep this constraint for now; this means you can't use
        -- Cabal to Haddock internal libraries.  This does not seem
        -- like a big problem.
        docdir     = docdir     dirs',
        htmldir    = htmldir    dirs',
        haddockdir = haddockdir dirs'
        }
      where
        dirs :: InstallDirs String
    dirs  = PackageDescription
    -> LocalBuildInfo -> UnitId -> CopyDest -> InstallDirs String
    absoluteComponentInstallDirs PackageDescription
    pkg LocalBuildInfo
    lbi UnitId
    uid CopyDest
    copydest
        -- Notice use of 'absoluteInstallDirs' (not the
        -- per-component variant).  This means for non-library
        -- packages we'll just pick a nondescriptive foo-0.1
        dirs' :: InstallDirs String
    dirs' = PackageDescription
    -> LocalBuildInfo -> CopyDest -> InstallDirs String
    absoluteInstallDirs PackageDescription
    pkg LocalBuildInfo
    lbi CopyDest
    copydest

    -- | Backwards compatibility function which computes the InstallDirs
    -- assuming that @$libname@ points to the public library (or some fake
    -- package identifier if there is no public library.)  IF AT ALL
    -- POSSIBLE, please use 'prefixRelativeComponentInstallDirs' instead.
    prefixRelativeInstallDirs :: PackageId -> LocalBuildInfo
                              -> InstallDirs (Maybe FilePath)
    prefixRelativeInstallDirs :: PackageId -> LocalBuildInfo -> InstallDirs (Maybe String)
    prefixRelativeInstallDirs PackageId
    pkg_descr LocalBuildInfo
    lbi =
        PackageId -> LocalBuildInfo -> UnitId -> InstallDirs (Maybe String)
    prefixRelativeComponentInstallDirs PackageId
    pkg_descr LocalBuildInfo
    lbi (LocalBuildInfo -> UnitId
    localUnitId LocalBuildInfo
    lbi)

    -- |See 'InstallDirs.prefixRelativeInstallDirs'
    prefixRelativeComponentInstallDirs :: PackageId -> LocalBuildInfo
                                       -> UnitId
                                       -> InstallDirs (Maybe FilePath)
    prefixRelativeComponentInstallDirs :: PackageId -> LocalBuildInfo -> UnitId -> InstallDirs (Maybe String)
    prefixRelativeComponentInstallDirs PackageId
    pkg_descr LocalBuildInfo
    lbi UnitId
    uid =
      PackageId
    -> UnitId
    -> CompilerInfo
    -> Platform
    -> InstallDirs PathTemplate
    -> InstallDirs (Maybe String)
    InstallDirs.prefixRelativeInstallDirs
        (PackageId -> PackageId
    forall pkg. Package pkg => pkg -> PackageId
    packageId PackageId
    pkg_descr)
        UnitId
    uid
        (Compiler -> CompilerInfo
    compilerInfo (LocalBuildInfo -> Compiler
    compiler LocalBuildInfo
    lbi))
        (LocalBuildInfo -> Platform
    hostPlatform LocalBuildInfo
    lbi)
        (LocalBuildInfo -> InstallDirs PathTemplate
    installDirTemplates LocalBuildInfo
    lbi)

    substPathTemplate :: PackageId -> LocalBuildInfo
                      -> UnitId
                      -> PathTemplate -> FilePath
    substPathTemplate :: PackageId -> LocalBuildInfo -> UnitId -> PathTemplate -> String
    substPathTemplate PackageId
    pkgid LocalBuildInfo
    lbi UnitId
    uid = PathTemplate -> String
    fromPathTemplate
                                        (PathTemplate -> String)
    -> (PathTemplate -> PathTemplate) -> PathTemplate -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . ( PathTemplateEnv -> PathTemplate -> PathTemplate
    InstallDirs.substPathTemplate PathTemplateEnv
    env )
        where env :: PathTemplateEnv
    env = PackageId -> UnitId -> CompilerInfo -> Platform -> PathTemplateEnv
    initialPathTemplateEnv
                       PackageId
    pkgid
                       UnitId
    uid
                       (Compiler -> CompilerInfo
    compilerInfo (LocalBuildInfo -> Compiler
    compiler LocalBuildInfo
    lbi))
                       (LocalBuildInfo -> Platform
    hostPlatform LocalBuildInfo
    lbi)