223 lines
8.2 KiB
Haskell
223 lines
8.2 KiB
Haskell
{-# LANGUAGE OverloadedStrings, CPP #-}
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module Language.Haskell.GhcMod.CabalApi (
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getCompilerOptions
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, parseCabalFile
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, cabalAllBuildInfo
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, cabalDependPackages
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, cabalSourceDirs
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, cabalAllTargets
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) where
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import Language.Haskell.GhcMod.Types
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import Language.Haskell.GhcMod.GhcPkg
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import Control.Applicative ((<$>))
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import Control.Exception (throwIO)
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import Control.Monad (filterM)
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import CoreMonad (liftIO)
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import Data.Maybe (maybeToList, catMaybes)
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import Data.Set (fromList, toList)
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import Distribution.ModuleName (ModuleName,toFilePath)
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import Distribution.Package (Dependency(Dependency)
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, PackageName(PackageName))
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import qualified Distribution.Package as C
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import Distribution.PackageDescription (PackageDescription, BuildInfo, TestSuite, TestSuiteInterface(..), Executable)
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import qualified Distribution.PackageDescription as P
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import Distribution.PackageDescription.Configuration (finalizePackageDescription)
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import Distribution.PackageDescription.Parse (readPackageDescription)
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import Distribution.Simple.Compiler (CompilerId(..), CompilerFlavor(..))
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import Distribution.Simple.Program (ghcProgram)
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import Distribution.Simple.Program.Types (programName, programFindVersion)
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import Distribution.System (buildPlatform)
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import Distribution.Text (display)
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import Distribution.Verbosity (silent)
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import Distribution.Version (Version)
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import System.Directory (doesFileExist)
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import System.FilePath (dropExtension, takeFileName, (</>))
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----------------------------------------------------------------
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-- | Getting necessary 'CompilerOptions' from three information sources.
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getCompilerOptions :: [GHCOption]
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-> Cradle
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-> PackageDescription
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-> IO CompilerOptions
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getCompilerOptions ghcopts cradle pkgDesc = do
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gopts <- getGHCOptions ghcopts cradle rdir $ head buildInfos
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dbPkgs <- ghcPkgListEx (cradlePkgDbStack cradle)
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return $ CompilerOptions gopts idirs (depPkgs dbPkgs)
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where
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wdir = cradleCurrentDir cradle
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rdir = cradleRootDir cradle
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Just cfile = cradleCabalFile cradle
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thisPkg = dropExtension $ takeFileName cfile
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buildInfos = cabalAllBuildInfo pkgDesc
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idirs = includeDirectories rdir wdir $ cabalSourceDirs buildInfos
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depPkgs ps = attachPackageIds ps
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$ removeThem (problematicPackages ++ [thisPkg])
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$ cabalDependPackages buildInfos
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----------------------------------------------------------------
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-- Dependent packages
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removeThem :: [PackageBaseName] -> [PackageBaseName] -> [PackageBaseName]
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removeThem badpkgs = filter (`notElem` badpkgs)
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problematicPackages :: [PackageBaseName]
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problematicPackages = [
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"base-compat" -- providing "Prelude"
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]
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attachPackageIds :: [Package] -> [PackageBaseName] -> [Package]
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attachPackageIds pkgs = catMaybes . fmap (`lookup3` pkgs)
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lookup3 :: Eq a => a -> [(a,b,c)] -> Maybe (a,b,c)
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lookup3 _ [] = Nothing
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lookup3 k (t@(a,_,_):ls)
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| k == a = Just t
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| otherwise = lookup3 k ls
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----------------------------------------------------------------
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-- Include directories for modules
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cabalBuildDirs :: [FilePath]
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cabalBuildDirs = ["dist/build", "dist/build/autogen"]
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includeDirectories :: FilePath -> FilePath -> [FilePath] -> [FilePath]
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includeDirectories cdir wdir dirs = uniqueAndSort (extdirs ++ [cdir,wdir])
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where
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extdirs = map expand $ dirs ++ cabalBuildDirs
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expand "." = cdir
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expand subdir = cdir </> subdir
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----------------------------------------------------------------
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-- | Parsing a cabal file and returns 'PackageDescription'.
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-- 'IOException' is thrown if parsing fails.
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parseCabalFile :: FilePath -> IO PackageDescription
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parseCabalFile file = do
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cid <- getGHCId
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epgd <- readPackageDescription silent file
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case toPkgDesc cid epgd of
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Left deps -> throwIO $ userError $ show deps ++ " are not installed"
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Right (pd,_) -> if nullPkg pd
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then throwIO $ userError $ file ++ " is broken"
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else return pd
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where
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toPkgDesc cid = finalizePackageDescription [] (const True) buildPlatform cid []
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nullPkg pd = name == ""
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where
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PackageName name = C.pkgName (P.package pd)
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----------------------------------------------------------------
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getGHCOptions :: [GHCOption] -> Cradle -> FilePath -> BuildInfo -> IO [GHCOption]
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getGHCOptions ghcopts cradle rdir binfo = do
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cabalCpp <- cabalCppOptions rdir
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let cpps = map ("-optP" ++) $ P.cppOptions binfo ++ cabalCpp
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return $ ghcopts ++ pkgDb ++ exts ++ [lang] ++ libs ++ libDirs ++ cpps
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where
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pkgDb = ghcDbStackOpts $ cradlePkgDbStack cradle
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lang = maybe "-XHaskell98" (("-X" ++) . display) $ P.defaultLanguage binfo
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libDirs = map ("-L" ++) $ P.extraLibDirs binfo
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exts = map (("-X" ++) . display) $ P.usedExtensions binfo
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libs = map ("-l" ++) $ P.extraLibs binfo
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cabalCppOptions :: FilePath -> IO [String]
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cabalCppOptions dir = do
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exist <- doesFileExist cabalMacro
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return $ if exist then
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["-include", cabalMacro]
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else
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[]
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where
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cabalMacro = dir </> "dist/build/autogen/cabal_macros.h"
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----------------------------------------------------------------
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-- | Extracting all 'BuildInfo' for libraries, executables, and tests.
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cabalAllBuildInfo :: PackageDescription -> [BuildInfo]
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cabalAllBuildInfo pd = libBI ++ execBI ++ testBI ++ benchBI
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where
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libBI = map P.libBuildInfo $ maybeToList $ P.library pd
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execBI = map P.buildInfo $ P.executables pd
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testBI = map P.testBuildInfo $ P.testSuites pd
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#if __GLASGOW_HASKELL__ >= 704
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benchBI = map P.benchmarkBuildInfo $ P.benchmarks pd
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#else
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benchBI = []
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#endif
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----------------------------------------------------------------
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-- | Extracting package names of dependency.
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cabalDependPackages :: [BuildInfo] -> [PackageBaseName]
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cabalDependPackages bis = uniqueAndSort pkgs
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where
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pkgs = map getDependencyPackageName $ concatMap P.targetBuildDepends bis
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getDependencyPackageName (Dependency (PackageName nm) _) = nm
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----------------------------------------------------------------
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-- | Extracting include directories for modules.
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cabalSourceDirs :: [BuildInfo] -> [IncludeDir]
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cabalSourceDirs bis = uniqueAndSort $ concatMap P.hsSourceDirs bis
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----------------------------------------------------------------
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uniqueAndSort :: [String] -> [String]
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uniqueAndSort = toList . fromList
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----------------------------------------------------------------
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getGHCId :: IO CompilerId
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getGHCId = CompilerId GHC <$> getGHC
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getGHC :: IO Version
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getGHC = do
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mv <- programFindVersion ghcProgram silent (programName ghcProgram)
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case mv of
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Nothing -> throwIO $ userError "ghc not found"
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Just v -> return v
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----------------------------------------------------------------
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-- | Extracting all 'Module' 'FilePath's for libraries, executables,
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-- tests and benchmarks.
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cabalAllTargets :: PackageDescription -> IO ([String],[String],[String],[String])
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cabalAllTargets pd = do
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exeTargets <- mapM getExecutableTarget $ P.executables pd
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testTargets <- mapM getTestTarget $ P.testSuites pd
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return (libTargets,concat exeTargets,concat testTargets,benchTargets)
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where
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lib = case P.library pd of
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Nothing -> []
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Just l -> P.libModules l
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libTargets = map toModuleString lib
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#if __GLASGOW_HASKELL__ >= 704
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benchTargets = map toModuleString $ concatMap P.benchmarkModules $ P.benchmarks pd
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#else
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benchTargets = []
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#endif
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toModuleString :: ModuleName -> String
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toModuleString mn = fromFilePath $ toFilePath mn
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fromFilePath :: FilePath -> String
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fromFilePath fp = map (\c -> if c=='/' then '.' else c) fp
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getTestTarget :: TestSuite -> IO [String]
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getTestTarget ts =
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case P.testInterface ts of
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(TestSuiteExeV10 _ filePath) -> do
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let maybeTests = [p </> e | p <- P.hsSourceDirs $ P.testBuildInfo ts, e <- [filePath]]
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liftIO $ filterM doesFileExist maybeTests
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(TestSuiteLibV09 _ moduleName) -> return [toModuleString moduleName]
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(TestSuiteUnsupported _) -> return []
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getExecutableTarget :: Executable -> IO [String]
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getExecutableTarget exe = do
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let maybeExes = [p </> e | p <- P.hsSourceDirs $ P.buildInfo exe, e <- [P.modulePath exe]]
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liftIO $ filterM doesFileExist maybeExes
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