Missing YAML for Arg::last

[AndrewGaspar]

Rust Version

rustc 1.23.0 (766bd11c8 2018-01-01)

Affected Version of clap

andre@ANDREW-DESKTOP:/mnt/c/Users/andre/Projects/cargo-mpirun$ grep clap Cargo.lock
 "clap 2.29.4 (registry+https://github.com/rust-lang/crates.io-index)",
name = "clap"
"checksum clap 2.29.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7b8f59bcebcfe4269b09f71dab0da15b355c75916a8f975d3876ce81561893ee"

Expected Behavior Summary

The YAML should allow you to specify an arg with last: true, marking it as the last argument

Actual Behavior Summary

YAML fails to parse with this error:

thread 'main' panicked at 'Unknown Arg setting 'last' in YAML file for arg 'args'', /home/andre/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-2.29.4/src/args/arg.rs:147:21note: Run with `RUST_BACKTRACE=1` for a backtrace.

Steps to Reproduce the issue

Create a new clap App from a YAML file.

Example:

cli.yml

name: example
version: "0.1"
author: Foo B. <[email protected]>
about: Fails to compile YAML
args:
    - args:
        last: true
        multiple: true
        allow_hyphen_values: true

main.rs

#[macro_use]
extern crate clap;
use clap::App;

fn main() {
    let cli = load_yaml!("cli.yml");
    let _matches = App::from_yaml(cli).get_matches();
}

Debug output

andre@ANDREW-DESKTOP:/mnt/c/Users/andre/Projects/cargo-mpirun$ cargo run -- --help
   Compiling clap v2.29.4
   Compiling cargo-mpirun v0.1.0 (file:///mnt/c/Users/andre/Projects/cargo-mpirun)
    Finished dev [unoptimized + debuginfo] target(s) in 10.57 secs
     Running `target/debug/cargo-mpirun --help`
thread 'main' panicked at 'Unknown Arg setting 'last' in YAML file for arg 'args'', /home/andre/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-2.29.4/src/args/arg.rs:147:21
note: Run with `RUST_BACKTRACE=1` for a backtrace.

[kbknapp]

Ah, thanks! I'm not at a computer right now, but this will be a quick fix once I can get to one.

[AndrewGaspar]

@kbknapp Will this fix go into v2.*?

[kbknapp]

Yes, I'll put out v2.29.5 shortly which will include it 😉

[AndrewGaspar]

Awesome, thank you!

[kbknapp]

@AndrewGaspar this fix was published under v2.30.0 which is on crates.io now

[AndrewGaspar]

Excellent, thank you!