28 lines
642 B
Haskell
28 lines
642 B
Haskell
module Main where
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import Options.Applicative
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import Aoc.Y2019.A01
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data Settings = Settings
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{ function :: FilePath -> IO ()
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, filename :: FilePath
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}
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solutions :: Parser (FilePath -> IO ())
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solutions = subparser $ mconcat $ map (\(name, func) -> command name (info (pure func) mempty))
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[ ("2019_01", solve201901)
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]
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parser :: Parser Settings
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parser = Settings
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<$> solutions
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<*> strArgument (metavar "INPUTFILE")
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opts :: ParserInfo Settings
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opts = info (helper <*> parser) $ fullDesc <> failureCode 1
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main :: IO ()
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main = do
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settings <- customExecParser (prefs showHelpOnEmpty) opts
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function settings $ filename settings
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