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Fall back to assuming ghc-mid is on PATH when exeutable name is not available

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This commit is contained in:
Daniel Gröber 2014-07-18 02:13:40 +02:00
parent 981051a642
commit ba9c70dff7
1 changed files with 9 additions and 2 deletions
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11
Language/Haskell/GhcMod/Find.hs
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@ -34,7 +34,7 @@ import Name (getOccString)
import System.Directory (doesDirectoryExist, getAppUserDataDirectory, doesFileExist, getModificationTime)
import System.FilePath ((</>), takeDirectory)
import System.IO
import System.Environment (getExecutablePath)
import System.Environment
#ifndef MIN_VERSION_containers
#define MIN_VERSION_containers(x,y,z) 1
@ -90,11 +90,18 @@ loadSymbolDb = SymbolDb <$> readSymbolDb
ghcModExecutable :: IO FilePath
#ifndef SPEC
ghcModExecutable = do
dir <- takeDirectory <$> getExecutablePath
dir <- getExecutablePath'
return $ dir </> "ghc-mod"
#else
ghcModExecutable = return "dist/build/ghc-mod/ghc-mod"
#endif
where
getExecutablePath' :: IO FilePath
# if __GLASGOW_HASKELL__ >= 706
getExecutablePath' = takeDirectory <$> getExecutablePath
# else
getExecutablePath' = return ""
# endif
readSymbolDb :: IO (Map Symbol [ModuleString])
readSymbolDb = handle (\(SomeException _) -> return M.empty) $ do