30 lines
1.0 KiB
Haskell
30 lines
1.0 KiB
Haskell
module Language.Haskell.GhcMod.Lint where
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import Exception (ghandle)
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import Control.Exception (SomeException(..))
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import Language.Haskell.GhcMod.Logger (checkErrorPrefix)
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import Language.Haskell.GhcMod.Convert
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import Language.Haskell.GhcMod.Types
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import Language.Haskell.GhcMod.Monad
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import Language.Haskell.HLint (hlint)
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import Language.Haskell.GhcMod.Utils (withMappedFile)
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import Data.List (stripPrefix)
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-- | Checking syntax of a target file using hlint.
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-- Warnings and errors are returned.
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lint :: IOish m
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=> LintOpts -- ^ Configuration parameters
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-> FilePath -- ^ A target file.
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-> GhcModT m String
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lint opt file =
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withMappedFile file $ \tempfile ->
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liftIO (hlint $ tempfile : "--quiet" : optLintHlintOpts opt)
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>>= mapM (replaceFileName tempfile)
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>>= ghandle handler . pack
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where
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pack = convert' . map init -- init drops the last \n.
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handler (SomeException e) = return $ checkErrorPrefix ++ show e ++ "\n"
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replaceFileName fp s = return $ maybe (show s) (file++) $ stripPrefix fp (show s)
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