mirror of
https://github.com/clap-rs/clap
synced 2024-12-15 07:12:32 +00:00
75 lines
1.8 KiB
Rust
75 lines
1.8 KiB
Rust
use clap::{Args, Parser};
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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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#[command(flatten)]
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vers: Vers,
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/// some regular input
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#[arg(group = "input")]
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input_file: Option<String>,
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/// some special input argument
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#[arg(long, group = "input")]
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spec_in: Option<String>,
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#[arg(short, requires = "input")]
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config: Option<String>,
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}
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#[derive(Args)]
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#[group(required = true, multiple = false)]
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struct Vers {
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/// set version manually
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#[arg(long, value_name = "VER")]
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set_ver: Option<String>,
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/// auto inc major
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#[arg(long)]
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major: bool,
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/// auto inc minor
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#[arg(long)]
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minor: bool,
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/// auto inc patch
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#[arg(long)]
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patch: bool,
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}
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fn main() {
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let cli = Cli::parse();
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// Let's assume the old version 1.2.3
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let mut major = 1;
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let mut minor = 2;
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let mut patch = 3;
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// See if --set_ver was used to set the version manually
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let vers = &cli.vers;
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let version = if let Some(ver) = vers.set_ver.as_deref() {
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ver.to_string()
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} else {
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// Increment the one requested (in a real program, we'd reset the lower numbers)
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let (maj, min, pat) = (vers.major, vers.minor, vers.patch);
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match (maj, min, pat) {
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(true, _, _) => major += 1,
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(_, true, _) => minor += 1,
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(_, _, true) => patch += 1,
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_ => unreachable!(),
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};
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format!("{major}.{minor}.{patch}")
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};
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println!("Version: {version}");
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// Check for usage of -c
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if let Some(config) = cli.config.as_deref() {
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let input = cli
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.input_file
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.as_deref()
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.unwrap_or_else(|| cli.spec_in.as_deref().unwrap());
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println!("Doing work using input {input} and config {config}");
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}
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}
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