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69 lines
1.7 KiB
Rust
69 lines
1.7 KiB
Rust
use std::path::PathBuf;
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use clap::{Parser, Subcommand};
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#[derive(Parser)]
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#[command(author, version, about, long_about = None)]
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struct Cli {
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/// Optional name to operate on
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name: Option<String>,
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/// Sets a custom config file
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#[arg(short, long, value_name = "FILE")]
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config: Option<PathBuf>,
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/// Turn debugging information on
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#[arg(short, long, action = clap::ArgAction::Count)]
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debug: u8,
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#[command(subcommand)]
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command: Option<Commands>,
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}
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#[derive(Subcommand)]
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enum Commands {
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/// does testing things
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Test {
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/// lists test values
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#[arg(short, long)]
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list: bool,
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},
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}
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fn main() {
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let cli = Cli::parse();
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// You can check the value provided by positional arguments, or option arguments
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if let Some(name) = cli.name.as_deref() {
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println!("Value for name: {name}")
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}
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if let Some(config_path) = cli.config.as_deref() {
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println!("Value for config: {}", config_path.display());
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}
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// You can see how many times a particular flag or argument occurred
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// Note, only flags can have multiple occurrences
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match cli.debug {
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0 => println!("Debug mode is off"),
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1 => println!("Debug mode is kind of on"),
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2 => println!("Debug mode is on"),
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_ => println!("Don't be crazy"),
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}
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// You can check for the existence of subcommands, and if found use their
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// matches just as you would the top level cmd
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match &cli.command {
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Some(Commands::Test { list }) => {
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if *list {
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println!("Printing testing lists...");
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} else {
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println!("Not printing testing lists...");
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}
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}
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None => {}
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}
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// Continued program logic goes here...
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}
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