在Rust的命令调用中使用PathBuf的最佳方式是什么？

use std::path::{Path, PathBuf};

fn main() {
    // 创建一个基础的 PathBuf
    let mut path = PathBuf::from("/home/user");

    // 追加一个目录
    path.push("documents");
    println!("Path after appending 'documents': {:?}", path);

    // 插入一个文件名
    path.push("report.txt");
    println!("Path after appending 'report.txt': {:?}", path);

    // 删除最后一个组件
    path.pop();
    println!("Path after popping last component: {:?}", path);

    // 检查路径是否存在
    if path.exists() {
        println!("The path {:?} exists.", path);
    } else {
        println!("The path {:?} does not exist.", path);
    }

    // 使用 PathBuf 构建命令调用
    let output = std::process::Command::new("ls")
        .arg(path)
        .output()
        .expect("Failed to execute command");

    if output.status.success() {
        let content = String::from_utf8_lossy(&output.stdout);
        println!("Command output:\n{}", content);
    } else {
        eprintln!("Command failed with status: {}", output.status);
    }
}

let path = PathBuf::from("/valid").join("path//with//double//slashes");
if let Some(s) = path.to_str() {
    println!("Valid path string: {}", s);
} else {
    eprintln!("Invalid path components.");
}