class Bundler::Runtime

def require(*groups)
  groups.map!(&:to_sym)
  groups = [:default] if groups.empty?
  @definition.dependencies.each do |dep|
    # Skip the dependency if it is not in any of the requested groups, or
    # not for the current platform, or doesn't match the gem constraints.
    next unless (dep.groups & groups).any? && dep.should_include?
    required_file = nil
    begin
      # Loop through all the specified autorequires for the
      # dependency. If there are none, use the dependency's name
      # as the autorequire.
      Array(dep.autorequire || dep.name).each do |file|
        # Allow `require: true` as an alias for `require: <name>`
        file = dep.name if file == true
        required_file = file
        begin
          Kernel.require file
        rescue RuntimeError => e
          raise e if e.is_a?(LoadError) # we handle this a little later
          raise Bundler::GemRequireError.new e,
            "There was an error while trying to load the gem '#{file}'."
        end
      end
    rescue LoadError => e
      raise if dep.autorequire || e.path != required_file
      if dep.autorequire.nil? && dep.name.include?("-")
        begin
          namespaced_file = dep.name.tr("-", "/")
          Kernel.require namespaced_file
        rescue LoadError => e
          raise if e.path != namespaced_file
        end
      end
    end
  end
end