mirror of
https://github.com/clap-rs/clap
synced 2024-12-13 22:32:33 +00:00
75 lines
1.8 KiB
Rust
75 lines
1.8 KiB
Rust
use clap::{Args, Parser};
|
|
|
|
#[derive(Parser)]
|
|
#[command(author, version, about, long_about = None)]
|
|
struct Cli {
|
|
#[command(flatten)]
|
|
vers: Vers,
|
|
|
|
/// some regular input
|
|
#[arg(group = "input")]
|
|
input_file: Option<String>,
|
|
|
|
/// some special input argument
|
|
#[arg(long, group = "input")]
|
|
spec_in: Option<String>,
|
|
|
|
#[arg(short, requires = "input")]
|
|
config: Option<String>,
|
|
}
|
|
|
|
#[derive(Args)]
|
|
#[group(required = true, multiple = false)]
|
|
struct Vers {
|
|
/// set version manually
|
|
#[arg(long, value_name = "VER")]
|
|
set_ver: Option<String>,
|
|
|
|
/// auto inc major
|
|
#[arg(long)]
|
|
major: bool,
|
|
|
|
/// auto inc minor
|
|
#[arg(long)]
|
|
minor: bool,
|
|
|
|
/// auto inc patch
|
|
#[arg(long)]
|
|
patch: bool,
|
|
}
|
|
|
|
fn main() {
|
|
let cli = Cli::parse();
|
|
|
|
// Let's assume the old version 1.2.3
|
|
let mut major = 1;
|
|
let mut minor = 2;
|
|
let mut patch = 3;
|
|
|
|
// See if --set_ver was used to set the version manually
|
|
let vers = &cli.vers;
|
|
let version = if let Some(ver) = vers.set_ver.as_deref() {
|
|
ver.to_string()
|
|
} else {
|
|
// Increment the one requested (in a real program, we'd reset the lower numbers)
|
|
let (maj, min, pat) = (vers.major, vers.minor, vers.patch);
|
|
match (maj, min, pat) {
|
|
(true, _, _) => major += 1,
|
|
(_, true, _) => minor += 1,
|
|
(_, _, true) => patch += 1,
|
|
_ => unreachable!(),
|
|
};
|
|
format!("{major}.{minor}.{patch}")
|
|
};
|
|
|
|
println!("Version: {version}");
|
|
|
|
// Check for usage of -c
|
|
if let Some(config) = cli.config.as_deref() {
|
|
let input = cli
|
|
.input_file
|
|
.as_deref()
|
|
.unwrap_or_else(|| cli.spec_in.as_deref().unwrap());
|
|
println!("Doing work using input {input} and config {config}");
|
|
}
|
|
}
|