check if tags exist

action.yml

@@ -24,4 +24,4 @@ runs:
       shell: bash
       run: |
         RESULT=$(${{ github.action_path }}/check.sh ${{ inputs.base-image }} ${{ inputs.derived-image }})
-        echo "differs=$RESULT" >> $GITHUB_OUTPUT
+        echo "exist=$RESULT" >> $GITHUB_OUTPUT

check.sh

@@ -2,7 +2,6 @@
 
 set -e
 
-BASE_LAYERS="$(skopeo inspect $1 | jq '.Layers')"
-DERIVED_LAYERS="$(skopeo inspect $2 | jq '.Layers')"
-
-jq '.base - .derived | .!=[]' <<< "{\"base\": $BASE_LAYERS, \"derived\": $DERIVED_LAYERS}"
+TAGS=$((skopeo list-tags docker://gitea.phadric.de/andreas/sambaa || echo '{"Tags":[]}' )| jq '["alatest","latest"] - .Tags')
+#echo $TAGS | jq '"Tag not found: "+ .[]'
+echo $TAGS | jq '.==[]'