import-artifact-tree.md

# Prerequisite
# 1) Install azure-cli, oras

import_artifact_tree()
{
  local reference=$1
  local artifacts
  local artifact

  if [[ $reference = sha256:* ]]
  then
    echo "import: $source_registry/$source_repo@$reference"
    # use --reposiotry to avoid generate default latest tag
    az acr import -n $target_registry --source $source_registry/$source_repo@$reference --repository $source_repo --force
    artifacts=$(oras discover -o json $source_registry/$source_repo@$reference | jq -r ".manifests[].digest //empty")
  else
    echo "import: $source_registry/$source_repo:$reference"
    az acr import -n $target_registry --source $source_registry/$source_repo:$reference --force
    artifacts=$(oras discover -o json $source_registry/$source_repo:$reference | jq -r ".manifests[].digest //empty")
  fi

  for artifact in $artifacts; do
    import_artifact_tree $artifact
  done
  
  # TODO: if it's a manifest list or oci index, continue to import the artifacts associated with each child manifest
}

source_registry="mcr.microsoft.com"
source_repo="mirror/docker/bitnami/kafka"
source_tag="3.2"
target_registry="myregistry.azurecr.io"

# check source artifiact tree in the source regsitry
oras discover -o tree $source_registry/$source_repo:$source_tag

# import
import_artifact_tree $source_tag

# check imported artifact tree in the target registry
az acr login -n $target_registry
oras discover -o tree $target_registry/$source_repo:$source_tag