#
# Cookbook:: esh_undocker
# Resource:: download
#
# Copyright:: 2022, https://easyself.host
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

unified_mode true
property :image, String, name_property: true
default_action :download

action :download do
  image = new_resource.image
  parts = image.split(':')
  tag = parts.pop
  url, image = parts.join(':').split('/', 2)

  apt_package %w(skopeo ca-certificates jq)

  directory "#{Chef::Config['file_cache_path']}/#{image}-#{tag}" do
    owner 'root'
    group 'root'
    mode '0755'
    recursive true
    action :create
  end

  current_created = `skopeo inspect oci:#{Chef::Config['file_cache_path']}/#{image}-#{tag}:#{tag} | jq -r .Created`.strip
  latest_created = `skopeo inspect docker://#{url}/#{image}:#{tag} | jq -r .Created`.strip

  directory "#{Chef::Config['file_cache_path']}/#{image}-#{tag}" do
    recursive true
    action :delete
    only_if { current_created != latest_created }
  end

  execute "download docker image #{image} as oci layout format" do
    command <<~EOT
    skopeo copy \
      docker://#{url}/#{image}:#{tag} \
      oci:#{Chef::Config['file_cache_path']}/#{image}-#{tag}:#{tag}
    EOT
    not_if { ::File.exist?("#{Chef::Config['file_cache_path']}/#{image}-#{tag}/index.json") }
    live_stream true
  end
end