looping through tags to be removed

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

.gitea/workflows/docker.yaml

@@ -47,7 +47,7 @@ jobs:
     steps:
       - name: Get tag list
         run: |
-          TAGS="$(curl -s -u "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_PASS }}" https://${{ secrets.REGISTRY_PATH }}/v2/umbrella/tags/list | jq -r ".tags[]")"
+          TAGS="$(curl -u "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_PASS }}" -s ${{ secrets.REGISTRY_PATH }}/v2/umbrella/tags/list | jq -r ".tags[]")"
           COUNT=$(echo "$TAGS" | wc -l)
           REMAIN=$((COUNT - 10))
           echo "$TAGS" | head -n $REMAIN > /tmp/old_tags
@@ -56,4 +56,7 @@ jobs:
         run: |
           cat /tmp/old_tags | while read TAG; do
             echo about to delete $TAG
+            DIGEST=$(curl -u "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_PASS }}" -sS -H 'Accept: application/vnd.docker.distribution.manifest.v2+json' -o /dev/null -w '%header{Docker-Content-Digest}' ${{ secrets.REGISTRY_PATH }}/v2/umbrella/manifests/$TAG)
+            echo digest: $DIGEST
+            curl -u "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_PASS }}" -sS -X DELETE ${{ secrets.REGISTRY_PATH }}/v2/umbrella/manifests/$DIGEST
           done