1 files changed, 45 insertions, 0 deletions
diff --git a/app/Main.hs b/app/Main.hs
new file mode 100644
index 0000000..b0a3aca
--- /dev/null
+++ b/app/Main.hs
@@ -0,0 +1,45 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Main
+  ( main
+  ) where
+
+import           Data.Mili                      ( Term(..) )
+import qualified Data.Text                     as T
+import           Language.Mili.Analyzer         ( linearity )
+import           Language.Mili.Parser           ( parseProgram )
+import           Language.Mili.Reducer          ( nf )
+import           Options.Applicative            ( (<**>)
+                                                , Parser
+                                                , execParser
+                                                , fullDesc
+                                                , header
+                                                , helper
+                                                , info
+                                                )
+
+data ArgMode = ArgEval
+
+newtype Args = Args
+  { _argMode :: ArgMode
+  }
+
+args :: Parser Args
+args = pure $ Args ArgEval
+
+pipeline :: T.Text -> Either String Term
+pipeline program = parseProgram program >>= linearity
+
+actions :: Args -> IO ()
+actions Args { _argMode = ArgEval } = do
+  program <- getContents
+  case pipeline (T.pack program) of
+    Left err -> putStrLn err
+    Right out ->
+      let term   = show out
+          normal = show $ nf out
+      in  putStrLn $ term <> "\n" <> normal
+
+main :: IO ()
+main = execParser opts >>= actions
+  where opts = info (args <**> helper) (fullDesc <> header "bruijn but linear")