OptionParser#load

# File tmp/rubies/ruby-3.2.0/lib/optparse.rb, line 1916
def load(filename = nil, into: nil)
  unless filename
    basename = File.basename($0, '.*')
    return true if load(File.expand_path(basename, '~/.options'), into: into) rescue nil
    basename << ".options"
    return [
      # XDG
      ENV['XDG_CONFIG_HOME'],
      '~/.config',
      *ENV['XDG_CONFIG_DIRS']&.split(File::PATH_SEPARATOR),

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