class Gem::Commands::InstallCommand

def initialize
  defaults = Gem::DependencyInstaller::DEFAULT_OPTIONS.merge({
    :format_executable => false,
    :version           => Gem::Requirement.default,
  })
  super 'install', 'Install a gem into the local repository', defaults
  add_install_update_options
  add_local_remote_options
  add_platform_option
  add_version_option
  add_prerelease_option "to be installed. (Only for listed gems)"
  add_option(:"Install/Update", '-g', '--file FILE',
             'Read from a gem dependencies API file and',
             'install the listed gems') do |v,o|
    o[:gemdeps] = v
  end
  @installed_specs = nil
end