From 2d406f2226a9220fcdf321b11d302914e77b7c94 Mon Sep 17 00:00:00 2001
From: Damien George <damien@micropython.org>
Date: Thu, 3 Nov 2022 17:37:38 +1100
Subject: [PATCH] webassembly: Support piping in a program on stdin.

The performance benchmark suite can now be run on the webassembly port.

Signed-off-by: Damien George <damien@micropython.org>
---
 ports/webassembly/wrapper.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ports/webassembly/wrapper.js b/ports/webassembly/wrapper.js
index 24f4f8a72c..981ade5d80 100644
--- a/ports/webassembly/wrapper.js
+++ b/ports/webassembly/wrapper.js
@@ -56,6 +56,12 @@ var mainProgram = function()
               repl = false;;
           }
       }
+
+      if (process.stdin.isTTY === false) {
+          contents = fs.readFileSync(0, 'utf8');
+          repl = 0;
+      }
+
       mp_js_init(heap_size);
 
       if (repl) {