pub async fn install_components(app_id: &str, components: &Vec<String>) -> Result<u32, String> {

        let args = [app_id.to_string(), "-q".to_string()];

        let args = args.iter().cloned().chain(components.into_iter().cloned());

        let output = Protontricks::exec(args).await?;

        let re = Regex::new(r"(?m)^(?<name>[\w-]+) already installed, skipping$").unwrap();

        let total_tweaks: u32 = components.len().try_into().unwrap();

        let tweaks_already_installed: u32 = re.captures_iter(&output).count().try_into().unwrap();

        Ok(total_tweaks - tweaks_already_installed)

    }