new

# File lib/rubygems/dependency_installer.rb, line 77
  def initialize options = {}
    @only_install_dir = !!options[:install_dir]
    @install_dir = options[:install_dir] || Gem.dir
    @build_root = options[:build_root]

    options = DEFAULT_OPTIONS.merge options

    @bin_dir             = options[:bin_dir]
    @dev_shallow         = options[:dev_shallow]
    @development         = options[:development]
    @document            = options[:document]
    @domain              = options[:domain]
    @env_shebang         = options[:env_shebang]
    @force               = options[:force]
    @format_executable   = options[:format_executable]
    @ignore_dependencies = options[:ignore_dependencies]
    @prerelease          = options[:prerelease]
    @security_policy     = options[:security_policy]
    @user_install        = options[:user_install]
    @wrappers            = options[:wrappers]
    @build_args          = options[:build_args]
    @build_docs_in_background = options[:build_docs_in_background]
    @install_as_default  = options[:install_as_default]

    # Indicates that we should not try to update any deps unless
    # we absolutely must.
    @minimal_deps        = options[:minimal_deps]

    @available      = nil
    @installed_gems = []
    @toplevel_specs = nil

    @cache_dir = options[:cache_dir] || @install_dir

    @errors = []
  end