class ChefCLI::Policyfile::NullCookbookSource

def desc
  "null_cookbook_source"
end

def initialize(_uri = nil); end

def null?
  true
end

def preferred_cookbooks
  []
end

def source_options_for(cookbook_name, cookbook_version)
  raise UnsupportedFeature, "You must set a default_source in your Policyfile to download cookbooks without explicit sources"
end

def universe_graph
  {}
end