| use std::path::PathBuf; |
| |
| use clap::{arg, command, value_parser, ArgAction, ArgGroup}; |
| |
| fn main() { |
| // Create application like normal |
| let matches = command!() // requires `cargo` feature |
| // Add the version arguments |
| .arg(arg!(--"set-ver" <VER> "set version manually")) |
| .arg(arg!(--major "auto inc major").action(ArgAction::SetTrue)) |
| .arg(arg!(--minor "auto inc minor").action(ArgAction::SetTrue)) |
| .arg(arg!(--patch "auto inc patch").action(ArgAction::SetTrue)) |
| // Create a group, make it required, and add the above arguments |
| .group( |
| ArgGroup::new("vers") |
| .required(true) |
| .args(["set-ver", "major", "minor", "patch"]), |
| ) |
| // Arguments can also be added to a group individually, these two arguments |
| // are part of the "input" group which is not required |
| .arg( |
| arg!([INPUT_FILE] "some regular input") |
| .value_parser(value_parser!(PathBuf)) |
| .group("input"), |
| ) |
| .arg( |
| arg!(--"spec-in" <SPEC_IN> "some special input argument") |
| .value_parser(value_parser!(PathBuf)) |
| .group("input"), |
| ) |
| // Now let's assume we have a -c [config] argument which requires one of |
| // (but **not** both) the "input" arguments |
| .arg( |
| arg!(config: -c <CONFIG>) |
| .value_parser(value_parser!(PathBuf)) |
| .requires("input"), |
| ) |
| .get_matches(); |
| |
| // 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 version = if let Some(ver) = matches.get_one::<String>("set-ver") { |
| ver.to_owned() |
| } else { |
| // Increment the one requested (in a real program, we'd reset the lower numbers) |
| let (maj, min, pat) = ( |
| matches.get_flag("major"), |
| matches.get_flag("minor"), |
| matches.get_flag("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 matches.contains_id("config") { |
| let input = matches |
| .get_one::<PathBuf>("INPUT_FILE") |
| .unwrap_or_else(|| matches.get_one::<PathBuf>("spec-in").unwrap()) |
| .display(); |
| println!( |
| "Doing work using input {} and config {}", |
| input, |
| matches.get_one::<PathBuf>("config").unwrap().display() |
| ); |
| } |
| } |