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module Config (
Config(..),
findConfig,
parseConfig,
) where
import Control.Monad.Combinators
import Data.ByteString.Lazy qualified as BS
import Data.Text qualified as T
import Data.YAML
import System.Directory
import System.Exit
import System.FilePath
import System.FilePath.Glob
data Config = Config
{ configTool :: Maybe FilePath
, configTests :: [Pattern]
}
deriving (Show)
instance Semigroup Config where
a <> b = Config
{ configTool = maybe (configTool b) Just (configTool a)
, configTests = configTests a ++ configTests b
}
instance Monoid Config where
mempty = Config
{ configTool = Nothing
, configTests = []
}
instance FromYAML Config where
parseYAML = withMap "Config" $ \m -> Config
<$> (fmap T.unpack <$> m .:? "tool")
<*> (map (compile . T.unpack) <$> foldr1 (<|>)
[ fmap (:[]) (m .: "tests") -- single pattern
, m .:? "tests" .!= [] -- list of patterns
]
)
findConfig :: IO (Maybe FilePath)
findConfig = go "."
where
name = "erebos-tester.yaml"
go path = do
doesFileExist (path </> name) >>= \case
True -> return $ Just $ path </> name
False -> doesDirectoryExist (path </> "..") >>= \case
True -> do
parent <- canonicalizePath $ path </> ".."
if parent /= path then go parent
else return Nothing
False -> return Nothing
parseConfig :: FilePath -> IO Config
parseConfig path = do
contents <- BS.readFile path
case decode1 contents of
Left (pos, err) -> do
putStr $ prettyPosWithSource pos contents err
exitFailure
Right conf -> return conf
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