Rust是开发CLI工具的理想语言。本文介绍使用clap构建专业CLI应用。 ## 项目初始化 ```bash cargo new mycli cd mycli ``` ```toml [dependencies] clap = { version = "4", features = ["derive"] } ``` ## 定义CLI参数 ```rust use clap::{Parser, Subcommand}; #[derive(Parser)] #[command(name = "mycli")] #[command(about = "A cool CLI tool", long_about = None)] struct Cli { #[command(subcommand)] command: Commands, #[arg(short, long, global = true)] verbose: bool, } #[derive(Subcommand)] echo Commands { Add { name: String }, List { #[arg(short, long)] all: bool }, Remove { id: u32 }, } fn main() { let cli = Cli::parse(); match cli.command { Commands::Add { name } => println!("Adding: {}", name), Commands::List { all } => println!("Listing (all={})", all), Commands::Remove { id } => println!("Removing: {}", id), } } ``` ## 进度条与颜色 ```rust use indicatif::ProgressBar; use console::style; let pb = ProgressBar::new(100); for i in 0..100 { pb.inc(1); } pb.finish(); println!("{}", style("Success!").green().bold()); ``` ## 交互式输入 ```rust use dialoguer::{Input, Select, Confirm}; let name: String = Input::new() .with_prompt("Your name") .interact_text() .unwrap(); ``` Rust CLI工具编译为单个二进制文件，无运行时依赖，分发极其方便。