From 87ca4fdcc574c2d9e0094238826e8a72071ee9af Mon Sep 17 00:00:00 2001
From: Michael Mendy <montana@linux.com>
Date: Tue, 25 Feb 2025 14:03:45 -0800
Subject: [PATCH] add configurable port and better error handling

---
 tunnel.sh | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/tunnel.sh b/tunnel.sh
index 41f7402..07d3ada 100755
--- a/tunnel.sh
+++ b/tunnel.sh
@@ -1,13 +1,25 @@
 #!/bin/sh
 
+if [ "$1" = "--help" ]; then
+    echo "Usage: $0 [domain]"
+    echo "Exposes local server on port \$PORT (default 3040) via ngrok."
+    echo "If domain is provided, uses that domain."
+    exit 0
+fi
+
 domain=$1
-port=3040
+port=${PORT:-3040}
 
 if ! command -v ngrok >/dev/null 2>&1; then
     echo "Please install ngrok: https://ngrok.com/download"
     exit 1
 fi
 
+if ! nc -z localhost "$port" > /dev/null 2>&1; then
+    echo "Warning: No server is listening on port $port. Ngrok might not work as expected."
+fi
+
+echo "Starting ngrok on port $port..."
 if [ -n "$domain" ]; then
     ngrok http --domain="$domain" "$port"
 else