recipe.rb

execute "vagrant-berkshelf plugin" do
  command "vagrant plugin install vagrant-berkshelf --plugin-version 1.2.0"
  user jenkins_data['user']
  environment({'HOME' => jenkins_data[:home]})
  not_if do
    if ::File.exists?(::File.join(jenkins_vagrant, "plugins.json"))
      plugins = JSON.parse(
        IO.read(::File.join(jenkins_vagrant, "plugins.json"))
      )
      plugins['installed'].include?('vagrant-berkshelf')
    else
      false
    end
  end
end