From c13617684eb10fc622cc502249591002e2f7d74c Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom@tomsmeding.com>
Date: Sun, 25 Feb 2024 21:04:03 +0100
Subject: Separate out library

---
 app/Main.hs | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 app/Main.hs

(limited to 'app')

diff --git a/app/Main.hs b/app/Main.hs
new file mode 100644
index 0000000..b88d508
--- /dev/null
+++ b/app/Main.hs
@@ -0,0 +1,28 @@
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE TupleSections #-}
+module Main where
+
+import Data.List (intersperse)
+import System.Environment (getArgs)
+import System.Exit (die, exitFailure)
+
+import HSVIS.Parser
+
+
+main :: IO ()
+main = do
+  (source, fname) <- getArgs >>= \case
+    [] -> (,"<stdin>") <$> getContents
+    [fname] -> (,fname) <$> readFile fname
+    _ -> die "Usage: hs-visinter [filename.hs]"
+
+  prog <- case parse fname source of
+    This errs -> do
+      sequence_ $ intersperse (putStrLn "") (map (putStrLn . printErrMsg) errs)
+      exitFailure
+    These errs res -> do
+      sequence_ $ intersperse (putStrLn "") (map (putStrLn . printErrMsg) errs)
+      return res
+    That res -> return res
+
+  print prog
-- 
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