Google Container Registry cleanup

gcr-cleanup.sh

#!/bin/bash

# USAGE: gcr-cleanup.sh [tag-to-clean]
#   if you want to cleanup a specific tag, pass its name, otherwise all non-tagged images will be cleaned

images=$(gcloud container images list --repository=gcr.io/xxx --format='get(name)')
for image_name in $images; do
    if [ -n "$1" ]
      then
        gcloud container images untag --quiet $image_name:$1
      else
        for digest in `gcloud container images list-tags $image_name --filter='-tags:*' --format='get(digest)' --limit=100`; do
            echo DELETING $image_name@$digest
            gcloud container images delete --quiet $image_name@$digest
        done
    fi
done