From fb6ad1030f5bbd89c1ab4baf0cd0b79a28d36e50 Mon Sep 17 00:00:00 2001
From: Thomas E Lackey <telackey@bozemanpass.com>
Date: Wed, 28 Feb 2024 00:35:30 +0000
Subject: [PATCH] Only remove images if we have any.

---
 run.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/run.sh b/run.sh
index b733664..509658b 100755
--- a/run.sh
+++ b/run.sh
@@ -141,7 +141,11 @@ while true; do
     docker system prune --all --force
   fi
   if [[ "${WEBAPP_IMAGE_PRUNE:-true}" == "true" ]]; then
-    docker image rm -f $(docker image ls --quiet --filter 'reference=laconic-webapp')
+    OLD_IMAGES="$(docker image ls --quiet --filter 'reference=laconic-webapp')"
+    if [[ -n "$OLD_IMAGES" ]]; then
+      echo "Pruning images: $OLD_IMAGES"
+      docker image rm -f $OLD_IMAGES
+    fi
   fi
   sleep ${CHECK_INTERVAL:-15}
 done