Move transfer into the GF repo.

transfer/compile_to_core.hs

@@ -0,0 +1,52 @@
+module Main where
+
+import Transfer.Syntax.Lex
+import Transfer.Syntax.Par
+import Transfer.Syntax.Print
+import Transfer.Syntax.Abs
+import Transfer.Syntax.Layout
+
+import Transfer.ErrM
+import Transfer.SyntaxToCore
+
+import Transfer.PathUtil
+
+import System.Environment
+import System.Exit
+import System.IO
+
+import Debug.Trace
+
+myLLexer = resolveLayout True . myLexer
+
+compile :: Monad m => [Decl] -> m String
+compile m = return (printTree $ declsToCore m)
+
+loadModule :: FilePath -> IO [Decl]
+loadModule f = 
+    do
+    s <- readFile f
+    Module is ds <- case pModule (myLLexer s) of
+                     Bad e    -> die $ "Parse error in " ++ f ++ ": " ++ e
+                     Ok  m    -> return m 
+    let dir = directoryOf f
+        deps = [ replaceFilename f i ++ ".tr" | Import (Ident i) <- is ]
+    dss <- mapM loadModule deps
+    return $ concat (ds:dss)
+
+die :: String -> IO a
+die s = do
+        hPutStrLn stderr s
+        exitFailure
+
+coreFile :: FilePath -> FilePath
+coreFile f = replaceFilenameSuffix f "trc"
+
+compileFile :: FilePath -> IO String
+compileFile f = loadModule f >>= compile
+
+main :: IO ()
+main = do args <- getArgs
+          case args of
+            [f] -> compileFile f >>= writeFile (coreFile f)
+            _   -> die "Usage: compile_to_core <file>"