clap 捕获 Derive API 中一个字段中的所有剩余参数？

Question

我正在使用带有以下代码的 clap v3.1.18。

#[derive(Parser, Debug)]
#[clap(author, version, about = ABOUT_TEXT, long_about = Some(ABOUT_TEXT))]
struct Args {


    /// The root folder on local filesystem to scan
    #[clap(short, long, default_value_t = utils::get_current_dir())]
    folder: String,

    /// Max number of recursive folders to scan
    #[clap(short, long, default_value_t = 5)]
    depth: u8,

    /// Regular expression to include files. Only files whose name matches the specified regexp will be listed. E.g. to only list *.dll and *.exe files, you can specify `((\.dll)$)|((\.exe)$)`
    #[clap(short, long, default_value(".+"))]
    include: String,

    /// Regular expression to include files. Regular expression to exclude files and directories. Files or directories whose name matches this regexp will be skipped
    #[clap(short, long, default_value("(^~)|(^\.)|((\.tmp)$)|((\.log)$)"))]
    exclude: String,

    /// Command line to start child process
    #[clap(multiple_occurrences=true, use_delimiter=false)]
    command: String,
}
let args = Args::parse();

最后的command，我想获取命令行中所有剩余的部分，包括空格。但是当前代码不起作用，它被第一个空格终止。

我想我应该设置 .setting(AppSettings::TrailingVarArg)，但在 Derive API 中找不到这样做的方法。请问如何才能做到？

感谢@MeetTitan，这是我的代码终于可以工作了

#[derive(Parser, Debug)]
#[clap(author, version, about = ABOUT_TEXT, long_about = Some(ABOUT_TEXT), trailing_var_arg=true)]
struct Args {


    /// The root folder on local filesystem to scan
    #[clap(short, long, default_value_t = utils::get_current_dir())]
    folder: String,

    /// Max number of recursive folders to scan
    #[clap(short, long, default_value_t = 5)]
    depth: u8,

    /// Regular expression to include files. Only files whose name matches the specified regexp will be listed. E.g. to only list *.dll and *.exe files, you can specify `((\.dll)$)|((\.exe)$)`
    #[clap(short, long, default_value(".+"))]
    include: String,

    /// Regular expression to include files. Regular expression to exclude files and directories. Files or directories whose name matches this regexp will be skipped
    #[clap(short, long, default_value("(^~)|(^\.)|((\.tmp)$)|((\.log)$)"))]
    exclude: String,

    /// Command line to start child process
    #[clap(long, multiple_values=true, allow_hyphen_values=true)]
    run: Vec<String>,
}

Answer 1

derive reference 状态：

Any Command method can also be used as an attribute, see Terminology for syntax.

e.g. #[clap(arg_required_else_help(true))] would translate to cmd.arg_required_else_help(true)

使用这个我们可以导出 .setting(AppSettings::TrailingVarArg)，（更准确地说，App::trailing_var_arg()）像这样：

#[clap(... trailing_var_arg=true)]
struct Args { ... }

clap 捕获 Derive API 中一个字段中的所有剩余参数？

clap capture all remaining arguments in one field in Derive API?

rust

clap