OptionParser#load

# File tmp/rubies/ruby-4.1.0-preview1/lib/optparse.rb, line 2042
def load(filename = nil, **keywords)
  unless filename
    basename = File.basename($0, '.*')
    return true if load(File.expand_path("~/.options/#{basename}"), **keywords) rescue nil
    basename << ".options"
    if !(xdg = ENV['XDG_CONFIG_HOME']) or xdg.empty?
      # https://specifications.freedesktop.org/basedir-spec/latest/#variables
      #
      # If $XDG_CONFIG_HOME is either not set or empty, a default
      # equal to $HOME/.config should be used.
      xdg = ['~/.config', true]
    end
    return [
      xdg,

      *ENV['XDG_CONFIG_DIRS']&.split(File::PATH_SEPARATOR),

      # Haiku
      ['~/config/settings', true],
    ].any? {|dir, expand|
      next if !dir or dir.empty?
      filename = File.join(dir, basename)
      filename = File.expand_path(filename) if expand
      load(filename, **keywords) rescue nil
    }
  end
  begin
    parse(*File.readlines(filename, chomp: true), **keywords)
    true
  rescue Errno::ENOENT, Errno::ENOTDIR
    false
  end
end