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{-# LANGUAGE OverloadedRecordDot #-}
module History (getIssues, InvalidTreeGrepperResult (..), UnknownFileExtension (..)) where
import Control.Exception (Exception, throw)
import Data.Aeson (eitherDecode)
import Data.Maybe (catMaybes)
import Data.String (fromString)
import Issue (Issue (..), fromMatch)
import Process (quote, sh)
import System.FilePath (takeExtension)
import Text.Printf (printf)
import TreeGrepper.Match qualified as G
import TreeGrepper.Result qualified as G
data UnknownFileExtension = UnknownFileExtension
{ extension :: String
}
deriving (Show)
instance Exception UnknownFileExtension
data InvalidTreeGrepperResult = InvalidTreeGrepperResult
{ error :: String
}
deriving (Show)
instance Exception InvalidTreeGrepperResult
getIssues :: FilePath -> IO [Issue]
getIssues filename = do
let extension = takeExtension filename
treeGrepperLanguage =
-- TODO Add support for all tree-grepper supported files
--
-- tree-grepper supported files can be listed through `tree-grepper
-- --languages`.
case extension of
".elm" -> "elm"
".hs" -> "haskell"
".nix" -> "nix"
".sh" -> "sh"
_ -> throw (UnknownFileExtension extension)
treeGrepperQuery =
case extension of
".elm" -> "([(line_comment) (block_comment)])"
".hs" -> "(comment)"
".nix" -> "(comment)"
".sh" -> "(comment)"
_ -> throw (UnknownFileExtension extension)
decode raw =
case eitherDecode raw of
Left e -> throw (InvalidTreeGrepperResult e)
Right treeGrepperResult -> treeGrepperResult
matches <-
concatMap (\result -> map ((,) result) result.matches)
. map fixTreeGrepper
. decode
<$> sh
( fromString
( printf
"tree-grepper --query %s %s --format json %s"
(quote treeGrepperLanguage)
(quote treeGrepperQuery)
(quote filename)
)
)
catMaybes <$> mapM (uncurry fromMatch) matches
fixTreeGrepper :: G.Result -> G.Result
fixTreeGrepper treeGrepperResult =
treeGrepperResult {G.matches = G.merge treeGrepperResult.matches}
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