class Opal::Nodes::CallNode::DependencyResolver

def handle_part(sexp, missing_dynamic_require = @missing_dynamic_require)
  if sexp
    case sexp.type
    when :str
      return sexp.children[0]
    when :dstr
      return sexp.children.map { |i| handle_part i }.join
    when :begin
      return handle_part sexp.children[0] if sexp.children.length == 1
    when :send
      recv, meth, *args = sexp.children
      parts = args.map { |s| handle_part(s, :ignore) }
      return nil if parts.include? nil
      if recv.is_a?(::Opal::AST::Node) && recv.type == :const && recv.children.last == :File
        if meth == :expand_path
          return expand_path(*parts)
        elsif meth == :join
          return expand_path parts.join('/')
        elsif meth == :dirname
          return expand_path parts[0].split('/')[0...-1].join('/')
        end
      elsif meth == :__dir__
        return File.dirname(Opal::Compiler.module_name(@compiler.file))
      end
    end
  end
  case missing_dynamic_require
  when :error
    @compiler.error 'Cannot handle dynamic require', @sexp.line
  when :warning
    @compiler.warning 'Cannot handle dynamic require', @sexp.line
  end
end