使用puppet exec检测是否已安装Windows服务

我希望它只在未安装窗口服务时执行.所以我使用onlyif命令,但命令不起作用.它一直在运行安装：

exec { "install-${target_path}/${binary_name}":
    command   => "${installUtil_filepath} /i /servicename="${service_name}" /displayname="${display_name}" /description="${description}" "${target_path}${binary_name}"",onlyif    => "if((Get-Service "${service_name}" -ErrorAction SilentContinue).DisplayName -eq  ${display_name}) { exit 1 } else { exit 0 }",logoutput => true,provider => powershell,}

这很有效

if(Get-Service "${service_name}") { exit 1 } else { exit 0 }