Clap CLI Argument Parser

1use clap::{Parser, Subcommand};
2 
3#[derive(Parser)]
4#[command(name = "myapp")]
5#[command(about = "A sample CLI application")]
6struct Cli {
7    #[arg(short, long, action = clap::ArgAction::Count)]
8    verbose: u8,
9 
10    #[command(subcommand)]
11    command: Commands,
12}
13 
14#[derive(Subcommand)]
15enum Commands {
16    Add {
17        #[arg(short, long)]
18        name: String,
19    },
20    Remove {
21        #[arg(short, long)]
22        id: u32,
23    },
24    List {
25        #[arg(short, long, default_value_t = 10)]
26        limit: usize,
27    },
28}
29 
30fn main() {
31    let cli = Cli::parse();
32 
33    match &cli.command {
34        Commands::Add { name } => println!("Adding: {}", name),
35        Commands::Remove { id } => println!("Removing: {}", id),
36        Commands::List { limit } => println!("Listing {} items", limit),
37    }
38}