class Bundler::Definition

def find_source_requirements
  # Record the specs available in each gem's source, so that those
  # specs will be available later when the resolver knows where to
  # look for that gemspec (or its dependencies)
  source_requirements = if precompute_source_requirements_for_indirect_dependencies?
    all_requirements = source_map.all_requirements
    { default: default_source }.merge(all_requirements)
  else
    { default: Source::RubygemsAggregate.new(sources, source_map) }.merge(source_map.direct_requirements)
  end
  source_requirements.merge!(source_map.locked_requirements) if nothing_changed?
  metadata_dependencies.each do |dep|
    source_requirements[dep.name] = sources.metadata_source
  end
  default_bundler_source = source_requirements["bundler"] || default_source
  if @unlocking_bundler
    default_bundler_source.add_dependency_names("bundler")
  else
    source_requirements[:default_bundler] = default_bundler_source
    source_requirements["bundler"] = sources.metadata_source # needs to come last to override
  end
  source_requirements
end