From 3313cdadc07c4e7eeaf63e9a60614d73d208307f Mon Sep 17 00:00:00 2001
From: Shrikant Sharat Kandula <shrikant@appsmith.com>
Date: Wed, 19 Jul 2023 16:39:11 +0530
Subject: [PATCH] chore: Detect other NGINX and offer to kill (#25478)

In the `start-https.sh` script, detect if some other process is
listening on the ports we need, and if yes, inform of this, and offer to
kill and proceed.
---
 app/client/start-https.sh | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/app/client/start-https.sh b/app/client/start-https.sh
index 9c0546535e..4904fa5de9 100755
--- a/app/client/start-https.sh
+++ b/app/client/start-https.sh
@@ -340,6 +340,27 @@ if [[ -f $nginx_pid ]]; then
     unset temp_nginx_conf
 fi
 
+remaining_listeners="$(
+    lsof -nP "-iTCP:$http_listen_port" -sTCP:LISTEN || true
+    lsof -nP "-iTCP:$https_listen_port" -sTCP:LISTEN || true
+)"
+if [[ -n $remaining_listeners ]]; then
+    echo $'\nThe following processes are listening on the ports we want to use:\n'"$remaining_listeners"$'\n' >&2
+    answer=
+    for attempt in 1 2 3; do
+        echo -n 'Kill and proceed? [y/n] ' >&2
+        read -rn1 answer
+        if [[ $answer == y ]]; then
+            (lsof -t "-iTCP:$http_listen_port" -sTCP:LISTEN | xargs kill) || true
+            (lsof -t "-iTCP:$https_listen_port" -sTCP:LISTEN | xargs kill) || true
+            break
+        elif [[ $answer == n || $attempt == 3 ]]; then
+            echo $'\nAborting.' >&2
+            exit 1
+        fi
+    done
+fi
+
 if [[ $run_as == nginx ]]; then
     nginx -c "$nginx_dev_conf"
     stop_cmd="nginx -c '$nginx_dev_conf' -s quit"