Gem::Source#new_dependency_resolver_set

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/source.rb, line 482
def new_dependency_resolver_set
  return Gem::Resolver::IndexSet.new self if uri.scheme == "file"

  bundler_api_uri = enforce_trailing_slash(compact_index_uri) + "versions"

  begin
    fetcher = Gem::RemoteFetcher.fetcher
    response = fetcher.fetch_path bundler_api_uri, nil, true
  rescue Gem::RemoteFetcher::FetchError
    Gem::Resolver::IndexSet.new self
  else
    Gem::Resolver::APISet.new response.uri + "./info/"
  end
end