class RbSys::Cargo::Metadata

def cargo_metadata
  return @cargo_metadata if @cargo_metadata
  ::Gem.load_yaml
  cargo = ENV["CARGO"] || "cargo"
  args = ["metadata", "--format-version", "1"]
  args << "--no-deps" unless @deps
  out, stderr, status = Open3.capture3(cargo, *args)
  raise "exited with non-zero status (#{status})" unless status.success?
  data = Gem::SafeYAML.safe_load(out)
  raise "metadata must be a Hash" unless data.is_a?(Hash)
  @cargo_metadata = data
rescue => err
  raise CargoMetadataError.new(err, stderr)
end