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module Juvix.Extra.Clang where | ||
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import Juvix.Config qualified as Config | ||
import Juvix.Prelude | ||
import System.Environment | ||
import System.FilePath | ||
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data ClangPath | ||
= ClangSystemPath (Path Abs File) | ||
| ClangEnvVarPath (Path Abs File) | ||
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-- | If the path specified in Config is absolute, try using it. Otherwise, try | ||
-- searching the relative path to clang in JUVIX_LLVM_DIST_PATH. Otherwise use | ||
-- the PATH. | ||
findClang :: (Member EmbedIO r) => Sem r (Maybe ClangPath) | ||
findClang = do | ||
mp <- findClangFromConfig | ||
case mp of | ||
Just p -> return (Just (ClangSystemPath p)) | ||
Nothing -> do | ||
envVarPath <- findClangUsingEnvVar | ||
case envVarPath of | ||
Just p -> return (Just (ClangEnvVarPath p)) | ||
Nothing -> (fmap . fmap) ClangSystemPath findClangOnPath | ||
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checkExecutable :: forall r. (Member EmbedIO r) => Path Abs File -> Sem r (Maybe (Path Abs File)) | ||
checkExecutable p = whenMaybeM (liftIO (isExecutable p)) (return p) | ||
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findClangFromConfig :: forall r. (Member EmbedIO r) => Sem r (Maybe (Path Abs File)) | ||
findClangFromConfig = | ||
if | ||
| isAbsolute clangPath -> do | ||
let p :: Maybe (Path Abs File) | ||
p = parseAbsFile clangPath | ||
join <$> mapM checkExecutable p | ||
| otherwise -> return Nothing | ||
where | ||
clangPath :: FilePath | ||
clangPath = unpack $ Config.config ^. Config.configClang | ||
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findClangRelPath :: Maybe (Path Rel File) | ||
findClangRelPath = parseRelFile (unpack $ Config.config ^. Config.configClang) | ||
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findClangUsingEnvVar' :: forall r. (Member EmbedIO r) => Path Rel File -> Sem r (Maybe (Path Abs File)) | ||
findClangUsingEnvVar' clangRelPath = do | ||
p <- clangBinPath | ||
join <$> mapM checkExecutable p | ||
where | ||
clangBinPath :: Sem r (Maybe (Path Abs File)) | ||
clangBinPath = fmap (<//> $(mkRelDir "bin") <//> clangRelPath) <$> llvmDistPath | ||
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llvmDistPath :: Sem r (Maybe (Path Abs Dir)) | ||
llvmDistPath = liftIO $ do | ||
p <- lookupEnv llvmDistEnvironmentVar | ||
mapM parseAbsDir p | ||
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findClangUsingEnvVar :: forall r. (Member EmbedIO r) => Sem r (Maybe (Path Abs File)) | ||
findClangUsingEnvVar = | ||
case findClangRelPath of | ||
Just clangRelPath -> findClangUsingEnvVar' clangRelPath | ||
Nothing -> findClangUsingEnvVar' $(mkRelFile "clang") | ||
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extractClangPath :: ClangPath -> Path Abs File | ||
extractClangPath = \case | ||
ClangSystemPath p -> p | ||
ClangEnvVarPath p -> p | ||
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llvmDistEnvironmentVar :: String | ||
llvmDistEnvironmentVar = "JUVIX_LLVM_DIST_PATH" | ||
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findClangOnPath :: (Member EmbedIO r) => Sem r (Maybe (Path Abs File)) | ||
findClangOnPath = | ||
case findClangRelPath of | ||
Just clangRelPath -> findExecutable clangRelPath | ||
Nothing -> findExecutable $(mkRelFile "clang") |
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