opys-core

Manifest data model + opys shorthand + Val/Valset — the reference implementation of the frozen opys.json wire format.

[dependencies]
opys-core = "0.1"

use opys_core::{parse_manifest, filter_manifest, OsOptions};

let m = parse_manifest(include_str!("opys.json"))?;
let platform = OsOptions {
    name: "linux".into(),
    version: "6.12".into(),
    arch: "x86_64".into(),
};
let applicable = filter_manifest(&m, &platform, &[])?;
println!("{} artifacts apply to {}", applicable.artifacts.len(), platform.name);

The wire format is frozen — this crate is the contract a non-Rust reimplementation would reimplement exactly. Other opys crates layer on top:

• opys-runtime consumes a Manifest and installs + launches it.
• opys-mojang-rules is the rule evaluator this crate depends on.

Part of the opys toolkit.