173 lines
6.2 KiB
Haskell
173 lines
6.2 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
|
|
|
|
module Language.Haskell.GhcMod.CabalApi (
|
|
fromCabalFile
|
|
, parseCabalFile
|
|
, cabalAllBuildInfo
|
|
, cabalDependPackages
|
|
, cabalSourceDirs
|
|
, getGHCVersion
|
|
) where
|
|
|
|
import Control.Applicative ((<$>))
|
|
import Control.Exception (throwIO)
|
|
import Data.List (intercalate)
|
|
import Data.Maybe (maybeToList)
|
|
import Data.Set (fromList, toList)
|
|
import Distribution.Package (Dependency(Dependency)
|
|
, PackageName(PackageName)
|
|
, PackageIdentifier(pkgName))
|
|
import Distribution.PackageDescription
|
|
import Distribution.PackageDescription.Configuration (finalizePackageDescription)
|
|
import Distribution.PackageDescription.Parse (readPackageDescription)
|
|
import Distribution.Simple.Compiler (CompilerId(..), CompilerFlavor(..))
|
|
import Distribution.Simple.Program (ghcProgram)
|
|
import Distribution.Simple.Program.Types (programName, programFindVersion)
|
|
import Distribution.System (buildPlatform)
|
|
import Distribution.Text (display)
|
|
import Distribution.Verbosity (silent)
|
|
import Distribution.Version (versionBranch, Version)
|
|
import Language.Haskell.GhcMod.Types
|
|
import System.FilePath
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Parsing a cabal file in 'Cradle' and returns
|
|
-- options for GHC, include directories for modules and
|
|
-- package names of dependency.
|
|
fromCabalFile :: [GHCOption]
|
|
-> Cradle
|
|
-> IO ([GHCOption],[IncludeDir],[Package])
|
|
fromCabalFile ghcOptions cradle = do
|
|
cabal <- parseCabalFile cfile
|
|
return $ cookInfo ghcOptions cradle cabal
|
|
where
|
|
Just cfile = cradleCabalFile cradle
|
|
|
|
cookInfo :: [GHCOption] -> Cradle -> PackageDescription
|
|
-> ([GHCOption],[IncludeDir],[Package])
|
|
cookInfo ghcOptions cradle cabal = (gopts,idirs,depPkgs)
|
|
where
|
|
wdir = cradleCurrentDir cradle
|
|
Just cdir = cradleCabalDir cradle
|
|
Just cfile = cradleCabalFile cradle
|
|
buildInfos = cabalAllBuildInfo cabal
|
|
gopts = getGHCOptions ghcOptions cdir $ head buildInfos
|
|
idirs = includeDirectories cdir wdir $ cabalSourceDirs buildInfos
|
|
depPkgs = removeThem problematicPackages $ removeMe cfile $ cabalDependPackages buildInfos
|
|
|
|
----------------------------------------------------------------
|
|
-- Dependent packages
|
|
|
|
removeMe :: FilePath -> [Package] -> [Package]
|
|
removeMe cabalfile = filter (/= me)
|
|
where
|
|
me = dropExtension $ takeFileName cabalfile
|
|
|
|
removeThem :: [Package] -> [Package] -> [Package]
|
|
removeThem badpkgs = filter (`notElem` badpkgs)
|
|
|
|
problematicPackages :: [Package]
|
|
problematicPackages = [
|
|
"base-compat" -- providing "Prelude"
|
|
]
|
|
|
|
----------------------------------------------------------------
|
|
-- Include directories for modules
|
|
|
|
cabalBuildDirs :: [FilePath]
|
|
cabalBuildDirs = ["dist/build"]
|
|
|
|
includeDirectories :: FilePath -> FilePath -> [FilePath] -> [FilePath]
|
|
includeDirectories cdir wdir dirs = uniqueAndSort (extdirs ++ [cdir,wdir])
|
|
where
|
|
extdirs = map (cdir </>) $ dirs ++ cabalBuildDirs
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Parsing a cabal file and returns 'PackageDescription'.
|
|
-- 'IOException' is thrown if parsing fails.
|
|
parseCabalFile :: FilePath -> IO PackageDescription
|
|
parseCabalFile file = do
|
|
cid <- getGHCId
|
|
epgd <- readPackageDescription silent file
|
|
case toPkgDesc cid epgd of
|
|
Left deps -> throwIO $ userError $ show deps ++ " are not installed"
|
|
Right (pd,_) -> if nullPkg pd
|
|
then throwIO $ userError $ file ++ " is broken"
|
|
else return pd
|
|
where
|
|
toPkgDesc cid = finalizePackageDescription [] (const True) buildPlatform cid []
|
|
nullPkg pd = name == ""
|
|
where
|
|
PackageName name = pkgName (package pd)
|
|
|
|
----------------------------------------------------------------
|
|
|
|
getGHCOptions :: [GHCOption] -> FilePath -> BuildInfo -> [GHCOption]
|
|
getGHCOptions ghcOptions cdir binfo = ghcOptions ++ exts ++ [lang] ++ libs ++ libDirs ++ cpps
|
|
where
|
|
lang = maybe "-XHaskell98" (("-X" ++) . display) $ defaultLanguage binfo
|
|
libDirs = map ("-L" ++) $ extraLibDirs binfo
|
|
exts = map (("-X" ++) . display) $ usedExtensions binfo
|
|
libs = map ("-l" ++) $ extraLibs binfo
|
|
cpps = map ("-optP" ++) $ cppOptions binfo ++ cabalCppOptions cdir
|
|
|
|
cabalCppOptions :: FilePath -> [String]
|
|
cabalCppOptions dir = ["-include", dir </> "dist/build/autogen/cabal_macros.h"]
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Extracting all 'BuildInfo' for libraries, executables, tests and benchmarks.
|
|
cabalAllBuildInfo :: PackageDescription -> [BuildInfo]
|
|
cabalAllBuildInfo pd = libBI ++ execBI ++ testBI ++ benchBI
|
|
where
|
|
libBI = map libBuildInfo $ maybeToList $ library pd
|
|
execBI = map buildInfo $ executables pd
|
|
testBI = map testBuildInfo $ testSuites pd
|
|
benchBI = map benchmarkBuildInfo $ benchmarks pd
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Extracting package names of dependency.
|
|
cabalDependPackages :: [BuildInfo] -> [Package]
|
|
cabalDependPackages bis = uniqueAndSort $ pkgs
|
|
where
|
|
pkgs = map getDependencyPackageName $ concatMap targetBuildDepends bis
|
|
getDependencyPackageName (Dependency (PackageName nm) _) = nm
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Extracting include directories for modules.
|
|
cabalSourceDirs :: [BuildInfo] -> [IncludeDir]
|
|
cabalSourceDirs bis = uniqueAndSort $ concatMap hsSourceDirs bis
|
|
|
|
----------------------------------------------------------------
|
|
|
|
uniqueAndSort :: [String] -> [String]
|
|
uniqueAndSort = toList . fromList
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Getting GHC version. 7.6.3 becames 706 in the second of the result.
|
|
getGHCVersion :: IO (GHCVersion, Int)
|
|
getGHCVersion = toTupple <$> getGHC
|
|
where
|
|
toTupple v
|
|
| length vs < 2 = (verstr, 0)
|
|
| otherwise = (verstr, ver)
|
|
where
|
|
vs = versionBranch v
|
|
ver = (vs !! 0) * 100 + (vs !! 1)
|
|
verstr = intercalate "." . map show $ vs
|
|
|
|
getGHCId :: IO CompilerId
|
|
getGHCId = CompilerId GHC <$> getGHC
|
|
|
|
getGHC :: IO Version
|
|
getGHC = do
|
|
mv <- programFindVersion ghcProgram silent (programName ghcProgram)
|
|
case mv of
|
|
Nothing -> throwIO $ userError "ghc not found"
|
|
Just v -> return $ v
|