有没有办法通过命令输出来检查服务器上安装的软件包？
describe command('mysql -e "select version();"') do if its(:stdout) { should =~ /5.6.27-76.0-log/ } describe package('MySQL-client') do it { should be_installed } else describe package('Percona-client') do it { should be_installed } end end 谢谢，
那么，我不能发明一个更好的方式，那么这个：
def mysql_version command('mysql -e "select version();"').stdout end def plain_mysql? mysql_version =~ /5.6.27-76.0-log/ end def mysql_package_name if plain_mysql? 'MySQL-client' else 'Percona-client' end end describe package(mysql_package_name) do it { should be_installed } end