31 lines
1.0 KiB
Haskell
31 lines
1.0 KiB
Haskell
module GhcMod.Exe.Lint where
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import Exception (ghandle)
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import Control.Exception (SomeException(..))
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import GhcMod.Logger (checkErrorPrefix)
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import GhcMod.Convert
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import GhcMod.Types
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import GhcMod.Monad
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import Language.Haskell.HLint3
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import GhcMod.Utils (withMappedFile)
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import Language.Haskell.Exts.SrcLoc (SrcSpan(..))
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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 = ghandle handler $
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withMappedFile file $ \tempfile -> do
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res <- liftIO $ hlint $ "--quiet" : tempfile : optLintHlintOpts opt
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pack . map (show . substFile file tempfile) $ res
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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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substFile orig temp idea
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| srcSpanFilename (ideaSpan idea) == temp
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= idea{ideaSpan=(ideaSpan idea){srcSpanFilename = orig}}
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substFile _ _ idea = idea
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