y-build-nothing

#!/usr/bin/env bash
[ -z "$DEBUG" ] || set -x
set -eo pipefail

# Settings
DEFAULT_REGISTRY=builds-registry.ystack.svc.cluster.local
[ -z "$BUILDS_REGISTRY" ] && BUILDS_REGISTRY=$DEFAULT_REGISTRY
[ -z "$PUSH_REGISTRY" ]   && PUSH_REGISTRY=$DEFAULT_REGISTRY

if [ "$(curl -s --connect-timeout 3 http://$BUILDS_REGISTRY/v2/)" != "{}" ]
then
  echo "ERROR Skaffold need local access to the builds registry for digest lookup"
  echo "Registry: $BUILDS_REGISTRY"
  echo "Look for y-stack's ingress or port-forward utilities"
  exit 1
fi

[ -z "$IMAGE" ] && echo "No IMAGE env (from for example Skaffold)" && exit 1

IMAGE=$IMAGE
case "$IMAGE" in
  $BUILDS_REGISTRY/* ) ;;
  $BUILDS_REGISTRY:80/* ) ;;
  $PUSH_REGISTRY/* ) echo "Unlike y-build this script won't push to non-build registries" && exit 1 ;;
  * ) echo "Output is restricted to PUSH_REGISTRY=$PUSH_REGISTRY. Got: $IMAGE" && exit 1 ;;
esac

NOTHING_IMAGE=busybox@sha256:95cf004f559831017cdf4628aaf1bb30133677be8702a8c5f2994629f637a209

# TODO copy is significantly faster if the source image is already in the target repo

# crane hangs for a long time if it doesn't know that the registry is plain http
NOTHING_IMAGE=$(echo $NOTHING_IMAGE | sed 's|.local|.local:80|')
IMAGE=$(echo $IMAGE | sed 's|.local|.local:80|')

set -x
y-crane cp $NOTHING_IMAGE $IMAGE