add command line tool

1 files changed, 32 insertions, 0 deletions

diff --git a/tool/Compiler.hs b/tool/Compiler.hs
new file mode 100644
index 00000000..2195f0c6
--- /dev/null
+++ b/tool/Compiler.hs
@@ -0,0 +1,32 @@
+{-# LANGUAGE RecordWildCards #-}
+import Options.Applicative
+import Data.Aeson
+import qualified Data.ByteString.Lazy as B
+import LambdaCube.Compiler.Driver
+
+data Config
+  = Config
+  { srcName :: String
+  , backend :: Backend
+  }
+
+sample :: Parser Config
+sample = Config
+  <$> argument str (metavar "SOURCE_FILE")
+  <*> flag OpenGL33 WebGL1 (long "webgl" <> help "generate WebGL 1.0 pipeline" )
+
+main :: IO ()
+main = execParser opts >>= compile
+  where
+    opts = info (helper <*> sample)
+      ( fullDesc
+     <> progDesc "compiles LambdaCube graphics pipeline source to JSON IR"
+     <> header "LambdaCube 3D compiler" )
+
+compile :: Config -> IO ()
+compile Config{..} = do
+  pplRes <- compileMain ["."] backend srcName
+  case pplRes of
+    Left err -> putStrLn err
+    Right ppl -> do
+      B.writeFile (srcName <> ".json") $ encode ppl