73 lines
2.7 KiB
Haskell
73 lines
2.7 KiB
Haskell
{-# LANGUAGE BangPatterns, ScopedTypeVariables, TupleSections #-}
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module Language.Haskell.GhcMod.GhcPkg (
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ghcPkgDbOpt
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, ghcPkgDbStackOpts
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, ghcDbStackOpts
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, ghcDbOpt
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, getPackageCachePaths
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) 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)
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import Data.Maybe
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import Exception (handleIO)
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import Language.Haskell.GhcMod.Types
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import System.Directory (doesDirectoryExist, getAppUserDataDirectory)
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import System.FilePath ((</>))
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ghcVersion :: Int
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ghcVersion = read cProjectVersionInt
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----------------------------------------------------------------
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-- | Get options needed to add a list of package dbs to ghc-pkg's db stack
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ghcPkgDbStackOpts :: [GhcPkgDb] -- ^ Package db stack
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-> [String]
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ghcPkgDbStackOpts dbs = ghcPkgDbOpt `concatMap` dbs
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-- | Get options needed to add a list of package dbs to ghc's db stack
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ghcDbStackOpts :: [GhcPkgDb] -- ^ Package db stack
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-> [String]
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ghcDbStackOpts dbs = ghcDbOpt `concatMap` dbs
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----------------------------------------------------------------
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ghcPkgDbOpt :: GhcPkgDb -> [String]
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ghcPkgDbOpt GlobalDb = ["--global"]
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ghcPkgDbOpt UserDb = ["--user"]
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ghcPkgDbOpt (PackageDb pkgDb)
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| ghcVersion < 706 = ["--no-user-package-conf", "--package-conf=" ++ pkgDb]
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| otherwise = ["--no-user-package-db", "--package-db=" ++ pkgDb]
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ghcDbOpt :: GhcPkgDb -> [String]
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ghcDbOpt GlobalDb
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| ghcVersion < 706 = ["-global-package-conf"]
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| otherwise = ["-global-package-db"]
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ghcDbOpt UserDb
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| ghcVersion < 706 = ["-user-package-conf"]
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| otherwise = ["-user-package-db"]
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ghcDbOpt (PackageDb pkgDb)
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| ghcVersion < 706 = ["-no-user-package-conf", "-package-conf", pkgDb]
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| otherwise = ["-no-user-package-db", "-package-db", pkgDb]
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----------------------------------------------------------------
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getPackageCachePaths :: FilePath -> Cradle -> IO [FilePath]
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getPackageCachePaths sysPkgCfg crdl =
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catMaybes <$> resolvePackageConfig sysPkgCfg `mapM` cradlePkgDbStack crdl
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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)
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resolvePackageConfig sysPkgCfg GlobalDb = return $ Just sysPkgCfg
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resolvePackageConfig _ UserDb = handleIO (\_ -> return Nothing) $ do
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appdir <- getAppUserDataDirectory "ghc"
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let dir = appdir </> (target_arch ++ '-':target_os ++ '-':cProjectVersion)
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pkgconf = dir </> "package.conf.d"
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exist <- doesDirectoryExist pkgconf
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return $ if exist then Just pkgconf else Nothing
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where
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[target_arch,_,target_os] = splitOn "-" cTargetPlatformString
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resolvePackageConfig _ (PackageDb name) = return $ Just name
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