From fbd5b48ebbca847dacf37cca1a5661dd52e4780d Mon Sep 17 00:00:00 2001
From: Sam Nystrom <sam@samnystrom.dev>
Date: Fri, 23 Jun 2023 17:31:07 -0400
Subject: Exit with an error if stdin is not interactive

---
 main.ha | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/main.ha b/main.ha
index 1782cc5..a056a4d 100644
--- a/main.ha
+++ b/main.ha
@@ -53,6 +53,10 @@ export fn main() void = {
 		os::exit(1);
 	};
 
+	if (!tty::isatty(os::stdin_file)) {
+		fmt::fatal("Error: stdin is not a tty");
+	};
+
 	let path = cmd.args[0];
 	let mode = os::stat(path)!.mode;
 	if (mode & fs::mode::DIR != 0) {
-- 
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