ghc-mod/Language/Haskell/GhcMod/GhcPkg.hs

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{-# LANGUAGE BangPatterns, ScopedTypeVariables, TupleSections #-}
module Language.Haskell.GhcMod.GhcPkg (
ghcPkgDbOpt
, ghcPkgDbStackOpts
, ghcDbStackOpts
, ghcDbOpt
, getPackageDbStack
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, getPackageCachePaths
, getGhcPkgProgram
) where
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import Config (cProjectVersion, cTargetPlatformString, cProjectVersionInt)
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import Control.Applicative
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import Data.List.Split (splitOn)
import Data.Maybe
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import Exception (handleIO)
import System.Directory (doesDirectoryExist, getAppUserDataDirectory)
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import System.FilePath ((</>))
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import Prelude
import Language.Haskell.GhcMod.Types
import Language.Haskell.GhcMod.Monad.Types
import Language.Haskell.GhcMod.CabalHelper
import Language.Haskell.GhcMod.PathsAndFiles
import Language.Haskell.GhcMod.CustomPackageDb
ghcVersion :: Int
ghcVersion = read cProjectVersionInt
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----------------------------------------------------------------
-- | Get options needed to add a list of package dbs to ghc-pkg's db stack
ghcPkgDbStackOpts :: [GhcPkgDb] -- ^ Package db stack
-> [String]
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ghcPkgDbStackOpts dbs = ghcPkgDbOpt `concatMap` dbs
-- | Get options needed to add a list of package dbs to ghc's db stack
ghcDbStackOpts :: [GhcPkgDb] -- ^ Package db stack
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-> [String]
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ghcDbStackOpts dbs = ghcDbOpt `concatMap` dbs
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----------------------------------------------------------------
ghcPkgDbOpt :: GhcPkgDb -> [String]
ghcPkgDbOpt GlobalDb = ["--global"]
ghcPkgDbOpt UserDb = ["--user"]
ghcPkgDbOpt (PackageDb pkgDb)
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| ghcVersion < 706 = ["--no-user-package-conf", "--package-conf=" ++ pkgDb]
| otherwise = ["--no-user-package-db", "--package-db=" ++ pkgDb]
ghcDbOpt :: GhcPkgDb -> [String]
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ghcDbOpt GlobalDb
| ghcVersion < 706 = ["-global-package-conf"]
| otherwise = ["-global-package-db"]
ghcDbOpt UserDb
| ghcVersion < 706 = ["-user-package-conf"]
| otherwise = ["-user-package-db"]
ghcDbOpt (PackageDb pkgDb)
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| ghcVersion < 706 = ["-no-user-package-conf", "-package-conf", pkgDb]
| otherwise = ["-no-user-package-db", "-package-db", pkgDb]
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----------------------------------------------------------------
getGhcPkgProgram :: IOish m => GhcModT m FilePath
getGhcPkgProgram = do
crdl <- cradle
progs <- optPrograms <$> options
case cradleProjectType crdl of
StackProject -> do
Just ghcPkg <- getStackGhcPkgPath (cradleRootDir crdl)
return ghcPkg
_ ->
return $ ghcPkgProgram progs
getPackageDbStack :: IOish m => GhcModT m [GhcPkgDb]
getPackageDbStack = do
crdl <- cradle
mCusPkgStack <- getCustomPkgDbStack
stack <- case cradleProjectType crdl of
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PlainProject ->
return [GlobalDb, UserDb]
SandboxProject -> do
Just db <- liftIO $ getSandboxDb crdl
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return $ [GlobalDb, db]
CabalProject ->
getCabalPackageDbStack
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StackProject ->
getStackPackageDbStack
return $ fromMaybe stack mCusPkgStack
getPackageCachePaths :: IOish m => FilePath -> GhcModT m [FilePath]
getPackageCachePaths sysPkgCfg = do
pkgDbStack <- getPackageDbStack
catMaybes <$> (liftIO . resolvePackageConfig sysPkgCfg) `mapM` pkgDbStack
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-- TODO: use PkgConfRef
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--- Copied from ghc module `Packages' unfortunately it's not exported :/
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resolvePackageConfig :: FilePath -> GhcPkgDb -> IO (Maybe FilePath)
resolvePackageConfig sysPkgCfg GlobalDb = return $ Just sysPkgCfg
resolvePackageConfig _ UserDb = handleIO (\_ -> return Nothing) $ do
appdir <- getAppUserDataDirectory "ghc"
let dir = appdir </> (target_arch ++ '-':target_os ++ '-':cProjectVersion)
pkgconf = dir </> "package.conf.d"
exist <- doesDirectoryExist pkgconf
return $ if exist then Just pkgconf else Nothing
where
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[target_arch,_,target_os] = splitOn "-" cTargetPlatformString
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resolvePackageConfig _ (PackageDb name) = return $ Just name