| use std::path::PathBuf; |
| |
| use clap::error::ErrorKind; |
| use clap::{arg, command, value_parser, ArgAction}; |
| |
| fn main() { |
| // Create application like normal |
| let mut cmd = 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)) |
| // 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))) |
| .arg( |
| arg!(--"spec-in" <SPEC_IN> "some special input argument") |
| .value_parser(value_parser!(PathBuf)), |
| ) |
| // 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))); |
| let matches = cmd.get_matches_mut(); |
| |
| // 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") { |
| if matches.get_flag("major") || matches.get_flag("minor") || matches.get_flag("patch") { |
| cmd.error( |
| ErrorKind::ArgumentConflict, |
| "Can't do relative and absolute version change", |
| ) |
| .exit(); |
| } |
| ver.to_string() |
| } 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, false, false) => major += 1, |
| (false, true, false) => minor += 1, |
| (false, false, true) => patch += 1, |
| _ => { |
| cmd.error( |
| ErrorKind::ArgumentConflict, |
| "Can only modify one version field", |
| ) |
| .exit(); |
| } |
| }; |
| 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") |
| .or_else(|| matches.get_one::<PathBuf>("spec-in")) |
| .unwrap_or_else(|| { |
| cmd.error( |
| ErrorKind::MissingRequiredArgument, |
| "INPUT_FILE or --spec-in is required when using --config", |
| ) |
| .exit() |
| }) |
| .display(); |
| println!( |
| "Doing work using input {} and config {}", |
| input, |
| matches.get_one::<PathBuf>("config").unwrap().display() |
| ); |
| } |
| } |