config_file.rb

action :create do
  wp_secrets = Chef::Config[:file_cache_path] + '/wp-secrets.php'

  remote_file wp_secrets do
    source 'https://api.wordpress.org/secret-key/1.1/salt/'
    action :create_if_missing
    mode 0644
  end
  
  salt_data = 'foo'

  ruby_block 'fetch-salt-data' do
    block do
      salt_data = ::File.read(wp_secrets)
    end
    action :create
  end

  template ::File.join(new_resource.docroot, '/wp-config.php') do
    source 'wp-config.php.erb'
    mode 0755
    owner 'root'
    group 'root'
    variables(
      database:   new_resource.database,
      user:       new_resource.db_username,
      password:   new_resource.db_password,
      wp_secrets: salt_data
    )
  end
end