Gem::Commands::InstallCommand#execute

# File tmp/rubies/ruby-3.0.5/lib/rubygems/commands/install_command.rb, line 149
def execute
  if options.include? :gemdeps
    install_from_gemdeps
    return # not reached
  end

  @installed_specs = []

  ENV.delete 'GEM_PATH' if options[:install_dir].nil?

  check_install_dir
  check_version

  load_hooks

  exit_code = install_gems

  show_installed

  terminate_interaction exit_code
end