ghc-mod/GhcMod/Debug.hs
2017-01-12 17:05:47 +01:00

175 lines
5.8 KiB
Haskell

module GhcMod.Debug (debugInfo, rootInfo, componentInfo) where
import Control.Arrow (first)
import Control.Applicative
import Control.Monad
import qualified Data.Map as Map
import qualified Data.Set as Set
import Data.Char
import Data.Version
import Data.List.Split
import System.Directory
import GhcMod.Internal
import Language.Haskell.GhcMod.Cradle
import Language.Haskell.GhcMod.Monad
import Language.Haskell.GhcMod.Output
import Language.Haskell.GhcMod.Pretty
import Language.Haskell.GhcMod.Stack
import Language.Haskell.GhcMod.Target
import Language.Haskell.GhcMod.Types
import Language.Haskell.GhcMod.Utils
import Paths_ghc_mod (version)
import Config (cProjectVersion)
import Pretty
----------------------------------------------------------------
-- | Obtaining debug information.
debugInfo :: IOish m => GhcModT m String
debugInfo = do
Options {..} <- options
Cradle {..} <- cradle
cabal <-
case cradleProject of
CabalProject -> cabalDebug
StackProject {} -> (++) <$> stackPaths <*> cabalDebug
_ -> return []
pkgOpts <- packageGhcOptions
readProc <- gmReadProcess
ghcVersion <- liftIO $
dropWhileEnd isSpace <$> readProc "ghc" ["--numeric-version"] ""
return $ unlines $
[ "Version: ghc-mod-" ++ showVersion version
, "Library GHC Version: " ++ cProjectVersion
, "System GHC Version: " ++ ghcVersion
, "Root directory: " ++ cradleRootDir
, "Current directory: " ++ cradleCurrentDir
, "GHC Package flags:\n" ++ render (nest 4 $
fsep $ map text pkgOpts)
, "GHC System libraries: " ++ ghcLibDir
] ++ cabal
stackPaths :: IOish m => GhcModT m [String]
stackPaths = do
Cradle { cradleProject = StackProject senv } <- cradle
ghc <- getStackGhcPath senv
ghcPkg <- getStackGhcPkgPath senv
return $
[ "Stack ghc executable: " ++ show ghc
, "Stack ghc-pkg executable:" ++ show ghcPkg
]
cabalDebug :: IOish m => GhcModT m [String]
cabalDebug = do
Cradle {..} <- cradle
mcs <- cabalResolvedComponents
let entrypoints = Map.map gmcEntrypoints mcs
graphs = Map.map gmcHomeModuleGraph mcs
opts = Map.map gmcGhcOpts mcs
srcOpts = Map.map gmcGhcSrcOpts mcs
readProc <- gmReadProcess
cabalExists <- liftIO $ (/=Nothing) <$> findExecutable "cabal"
cabalInstVersion <-
if cabalExists
then liftIO $
dropWhileEnd isSpace <$> readProc "cabal" ["--numeric-version"] ""
else return ""
packages <- liftIO $ readProc "ghc-pkg" ["list", "--simple-output"] ""
let cabalPackages = filter ((== ["Cabal"]) . take 1 . splitOn "-") $ splitWhen isSpace packages
return $
[ "cabal-install Version: " ++ cabalInstVersion
, "Cabal Library Versions:\n" ++ render (nest 4 $
fsep $ map text cabalPackages)
, "Cabal file: " ++ show cradleCabalFile
, "Project: " ++ show cradleProject
, "Cabal entrypoints:\n" ++ render (nest 4 $
mapDoc gmComponentNameDoc smpDoc entrypoints)
, "Cabal components:\n" ++ render (nest 4 $
mapDoc gmComponentNameDoc graphDoc graphs)
, "GHC Cabal options:\n" ++ render (nest 4 $
mapDoc gmComponentNameDoc (fsep . map text) opts)
, "GHC search path options:\n" ++ render (nest 4 $
mapDoc gmComponentNameDoc (fsep . map text) srcOpts)
]
componentInfo :: IOish m => [String] -> GhcModT m String
componentInfo ts = do
-- TODO: most of this is copypasta of targetGhcOptions. Factor out more
-- useful function from there.
crdl <- cradle
sefnmn <- Set.fromList `liftM` mapM guessModuleFile ts
mcs <- cabalResolvedComponents
let
mdlcs = moduleComponents mcs `zipMap` Set.toList sefnmn
candidates = findCandidates $ map snd mdlcs
cn = pickComponent candidates
opts <- targetGhcOptions crdl sefnmn
return $ unlines $
[ "Matching Components:\n" ++ render (nest 4 $
alistDoc (either text mnDoc) (setDoc gmComponentNameDoc) mdlcs)
, "Picked Component:\n" ++ render (nest 4 $
gmComponentNameDoc cn)
, "GHC Cabal options:\n" ++ render (nest 4 $ fsep $ map text opts)
]
where
zipMap f l = l `zip` (f `map` l)
guessModuleFile :: MonadIO m => String -> m (Either FilePath ModuleName)
guessModuleFile m
| (isUpper . head .&&. (all $ all $ isAlphaNum .||. (=='.')) . splitOn ".") m =
return $ Right $ mkModuleName m
where
infixr 1 .||.
infixr 2 .&&.
(.||.) = liftA2 (||)
(.&&.) = liftA2 (&&)
guessModuleFile str = Left `liftM` liftIO (canonFilePath str)
graphDoc :: GmModuleGraph -> Doc
graphDoc GmModuleGraph{..} =
mapDoc mpDoc smpDoc' gmgGraph
where
smpDoc' smp = vcat $ map mpDoc' $ Set.toList smp
mpDoc' = text . moduleNameString . mpModule
setDoc :: (a -> Doc) -> Set.Set a -> Doc
setDoc f s = vcat $ map f $ Set.toList s
smpDoc :: Set.Set ModulePath -> Doc
smpDoc smp = setDoc mpDoc smp
mpDoc :: ModulePath -> Doc
mpDoc (ModulePath mn fn) = text (moduleNameString mn) <+> parens (text fn)
mnDoc :: ModuleName -> Doc
mnDoc mn = text (moduleNameString mn)
alistDoc :: Ord k => (k -> Doc) -> (a -> Doc) -> [(k, a)] -> Doc
alistDoc fk fa alist = mapDoc fk fa (Map.fromList alist)
mapDoc :: (k -> Doc) -> (a -> Doc) -> Map.Map k a -> Doc
mapDoc kd ad m = vcat $
map (uncurry ($+$)) $ map (first kd) $ Map.toList $ Map.map (nest 4 . ad) m
----------------------------------------------------------------
-- | Obtaining root information.
rootInfo :: forall m. (IOish m, GmOut m, GmEnv m) => m String
rootInfo = do
crdl <- findCradleNoLog =<< (optPrograms <$> options)
liftIO $ cleanupCradle crdl
return $ cradleRootDir crdl ++ "\n"