A procedural macro to derive application info at compile time, using cargo compile-time env vars and `clap-rs`.

Usage

#[appinfo::main]
fn main(){
    println!("hello world");
    cli.do_stuff();
    server.listen(3000);
}

Dependencies:

cargo add clap
cargo add appinfo

then in a terminal do:

Example:
❯ ./wonderful-cli -h
wonderful-cli (version: 0.1.0, commit revision: 0.1.0, repository: https://github.com/l-const/wonderful-cli) - A cli app that utilises the appinfo macro.

Details:

• All the info are retrieved at compile time.
• Default env vars: https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-crates
• For more, see here: https://github.com/l-const/appinfo-rs/blob/main/src/cli.rs#L5-L9

Future Enhacements

• Validation logic that the macro is applied only in main.
• Override of vars through the macro args.
• Overridable execution/usage info.
• Git commit revision using a compile/build time env var.