使用 `clap` 在 Rust CLI 工具中设置布尔标志

问题描述 投票:0回答:1

我正在尝试使用一个 CLI 工具根据一些指定的正则表达式编辑文件夹中的文件。

调试中,举个例子:

cargo run -- folder ./tests/test_files -t emails ip -r

意味着编辑文件夹路径中的所有文件 =

./tests/test_files
-r
意味着递归地这样做。

以下是试图实现这一目标的结构列表:

use clap::{Parser, Subcommand, Args};

#[derive(Debug, Parser)]
#[clap(author, version, about, name = "raf")]
pub struct Opts {
    #[clap(subcommand)]
    pub cmd: FileOrFolder,
}

#[derive(Debug, Subcommand)]
pub enum FileOrFolder {
    #[clap(name = "folder")]
    Folder(FolderOpts),
    #[clap(name = "file")]
    File(FileOpts),
}

#[derive(Args, Debug)]
pub struct FolderOpts {
    /// `path` of the directory in which all files should be redacted, e.g. ./tests/test_files
    #[clap(parse(from_os_str), required = true)]
    pub path: std::path::PathBuf,

    /// The type of redaction to be applied to the files, e.g. -t sgNRIC emails
    #[clap(short, long, required = true, multiple_values = true)]
    pub types: Vec<String>,

    #[clap(short, long, required = false, takes_value = false)]
    pub recursive: Option<bool>,
}

这是运行时出现的错误:

Finished dev [unoptimized + debuginfo] target(s) in 45.31s
     Running `target\debug\raf.exe folder ./tests/test_files -t sgNRIC email -r`
error: The argument '--recursive <RECURSIVE>' requires a value but none was supplied

For more information try --help
error: process didn't exit successfully: `target\debug\raf.exe folder ./tests/test_files -t sgNRIC email -r` (exit code: 2)

我的问题是,我该如何编写结构

FolderOpts
,如果
-r
作为参数出现在 CLI 参数中,它被解析为
.recursive
=
true
,如果它不存在,
.recursive 
=
false
?

rust command-line-interface clap
1个回答
1
投票

bool
选项不需要包含在
Option
中是可选的。它们默认设置为
false
,如果它们的名称作为参数传递,则设置为
true
。这应该有效:

#[clap(short, long)]
pub recursive: bool,
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