73 lines
2.1 KiB
Haskell
73 lines
2.1 KiB
Haskell
{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE CPP #-}
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module Main where
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import Control.Applicative (many, optional)
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#if !MIN_VERSION_base(4,11,0)
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import Data.Monoid ((<>))
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#endif
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import qualified Data.Text as Text (unpack)
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import Data.Version (showVersion)
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import Options.Applicative (
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Parser, execParser, fullDesc, info, header, help, helper, long, metavar
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, short, strArgument, strOption, value
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)
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import Paths_SJW (version)
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import SJW (Source, compile, mainIs, source, sourceCode)
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data Config = Config {
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includes :: [String]
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, mainModuleName :: Maybe String
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, outputFile :: FilePath
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, target :: FilePath
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} deriving (Show)
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configParser :: Parser Config
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configParser = Config
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<$> many (strOption (
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long "include"
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<> short 'I'
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<> metavar "PACKAGE"
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<> help "Include this package during compilation"
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))
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<*> optional (strOption (
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long "main-is"
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<> short 'm'
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<> metavar "MODULE_NAME"
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<> help "The name of the main module containing the code to run"
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))
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<*> strOption (
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long "output"
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<> short 'o'
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<> metavar "OUTPUT_PATH"
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<> help "The path where to create the compiled script (stdout if \"-\" or if the option is missing)"
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<> value "-"
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)
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<*> strArgument (
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metavar "SOURCE_DIR"
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<> help "The path where to look for the sources"
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)
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getConfig :: IO Config
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getConfig = execParser $
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info
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(helper <*> configParser)
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(fullDesc <> header ("SJW v" ++ showVersion version))
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getSource :: Config -> Source
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getSource (Config {includes, mainModuleName = Nothing, target}) =
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source (target:includes)
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getSource (Config {includes, mainModuleName = Just moduleName, target}) =
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source (target:includes) `mainIs` moduleName
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main :: IO ()
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main = do
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config@(Config {outputFile}) <- getConfig
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result <- SJW.sourceCode =<< SJW.compile (getSource config)
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case result of
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Nothing -> return ()
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Just code -> output outputFile $ Text.unpack code
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where
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output "-" = putStr
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output fileName = writeFile fileName
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