Add keepalive option

script.sh

@@ -23,15 +23,16 @@ tmate -S /tmp/tmate.sock wait tmate-ready
 echo To connect to this session copy-n-paste the following into a terminal:
 tmate -S /tmp/tmate.sock display -p '#{tmate_ssh}'
 
-echo "echo hi from debugger" >> ~/.bash_profile
-
 # Wait for connection to close or timeout in 15 min
-timeout=$((15*60))
+timeout=$((2*60))
 while [ -S /tmp/tmate.sock ]; do
   sleep 1
   timeout=$(($timeout-1))
-  if (( timeout < 0 )); then
-    echo Waiting on tmate connection timed out!
-    exit 1
+
+  if [ ! -f /tmp/keepalive ] ; then
+    if (( timeout < 0 )); then
+      echo Waiting on tmate connection timed out!
+      exit 1
+    fi
   fi
 done