Gem::BundlerVersionFinder.bundler_config_file

# File tmp/rubies/ruby-4.0.0/lib/rubygems/bundler_version_finder.rb, line 95
def self.bundler_config_file
  # see Bundler::Settings#global_config_file and local_config_file
  # global
  if ENV["BUNDLE_CONFIG"] && !ENV["BUNDLE_CONFIG"].empty?
    ENV["BUNDLE_CONFIG"]
  elsif ENV["BUNDLE_USER_CONFIG"] && !ENV["BUNDLE_USER_CONFIG"].empty?
    ENV["BUNDLE_USER_CONFIG"]
  elsif ENV["BUNDLE_USER_HOME"] && !ENV["BUNDLE_USER_HOME"].empty?
    ENV["BUNDLE_USER_HOME"] + "config"
  elsif Gem.user_home && !Gem.user_home.empty?
    Gem.user_home + ".bundle/config"
  else
    # local
    "config"
  end
end