{-# 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 forall a. Pretty a => a -> String
prettyShow (ComponentLocalBuildInfo -> UnitId
componentUnitId ComponentLocalBuildInfo
clbi) forall a. Eq a => a -> a -> Bool
== forall a. Pretty a => a -> String
prettyShow (ComponentLocalBuildInfo -> ComponentId
componentComponentId ComponentLocalBuildInfo
clbi)
                    then String
""
                    else forall a. Pretty a => a -> String
prettyShow (ComponentLocalBuildInfo -> UnitId
componentUnitId ComponentLocalBuildInfo
clbi)
            CLibName (LSubLibName UnqualComponentName
s) ->
                if forall a. Pretty a => a -> String
prettyShow (ComponentLocalBuildInfo -> UnitId
componentUnitId ComponentLocalBuildInfo
clbi) forall a. Eq a => a -> a -> Bool
== forall a. Pretty a => a -> String
prettyShow (ComponentLocalBuildInfo -> ComponentId
componentComponentId ComponentLocalBuildInfo
clbi)
                    then UnqualComponentName -> String
unUnqualComponentName UnqualComponentName
s
                    else 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 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
_ -> 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 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
_ -> 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 =
    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 =
    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 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 =
    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 = forall dir. InstallDirs dir -> dir
bindir InstallDirs String
installDirs
               | Bool
otherwise  = 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)) 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  = 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 = forall a. (a -> Bool) -> [a] -> [a]
filter forall {pkg}. HasUnitId pkg => pkg -> Bool
is_external (forall a. PackageIndex a -> [a]
allPackages (LocalBuildInfo -> InstalledPackageIndex
installedPkgs LocalBuildInfo
lbi))
        is_external :: pkg -> Bool
is_external pkg
ipkg = Bool -> Bool
not (forall pkg. HasUnitId pkg => pkg -> UnitId
installedUnitId pkg
ipkg 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  = forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap InstalledPackageInfo -> [String]
getDynDir [InstalledPackageInfo]
external_ipkgs

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

    let p :: String
p                = forall dir. InstallDirs dir -> dir
prefix InstallDirs String
installDirs
        prefixRelative :: String -> Bool
prefixRelative String
l = forall a. Maybe a -> Bool
isJust (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 = 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

    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 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 =
    forall a. Ord a => [a] -> [a]
ordNub forall a b. (a -> b) -> a -> b
$
    Library -> [ModuleName]
explicitLibModules Library
lib forall a. [a] -> [a] -> [a]
++
    case ComponentLocalBuildInfo
clbi of
        LibComponentLocalBuildInfo { componentInstantiatedWith :: ComponentLocalBuildInfo -> [(ModuleName, OpenModule)]
componentInstantiatedWith = [(ModuleName, OpenModule)]
insts } -> forall a b. (a -> b) -> [a] -> [b]
map 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
    (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 :: String
datadir    = forall dir. InstallDirs dir -> dir
datadir    InstallDirs String
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 :: String
docdir     = forall dir. InstallDirs dir -> dir
docdir     InstallDirs String
dirs',
    htmldir :: String
htmldir    = forall dir. InstallDirs dir -> dir
htmldir    InstallDirs String
dirs',
    haddockdir :: String
haddockdir = forall dir. InstallDirs dir -> dir
haddockdir InstallDirs String
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
    (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
                                    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)