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{- Copyright © 2015 Benjamin Barenblat
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>. -}
module Main where
import System.Environment (getArgs)
import System.Exit (exitFailure)
import Fragment (parseFile, parseStdin)
import Tangle (tangle)
main :: IO ()
main = do
args <- getArgs
parsed <- case args of
[] -> parseStdin
[f] -> parseFile f
_ -> usage >> exitFailure
case parsed of
Left err -> print err >> exitFailure
Right ok -> print $ tangle ok
usage :: IO ()
usage = putStrLn "usage: lyt [file]"
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