Tvix Evaluator ============== This project implements an interpreter for the Nix programming language. You can experiment with an online version of the evaluator: [tvixbolt][]. The interpreter aims to be compatible with `nixpkgs`, on the foundation of Nix 2.3. **Important note:** The evaluator is not yet feature-complete, and while the core mechanisms (compiler, runtime, ...) have stabilised somewhat, a lot of components are still changing rapidly. Please contact [TVL](https://tvl.fyi) with any questions you might have. ## Building tvix-eval Please check the `README.md` one level up for instructions on how to build this. The evaluator itself can also be built with standard Rust tooling (i.e. `cargo build`). If you would like to clone **only** the evaluator and build it directly with Rust tooling, you can do: ```bash git clone https://code.tvl.fyi/depot.git:/tvix/eval.git tvix-eval cd tvix-eval && cargo build ``` ## Nix test suite C++ Nix implements a language test suite in the form of Nix source code files, and their expected output. The coverage of this test suite is not complete, but we intend to be compatible with it. We have ported the test suite to Tvix, but do not run it by default as we are not yet compatible with it. You can run the test suite by enabling the `nix_tests` feature in Cargo: cargo test --features nix_tests ## rnix-parser Tvix is written in memory of jD91mZM2, the author of [rnix-parser][] who sadly [passed away][rip]. Tvix makes heavy use of rnix-parser in its bytecode compiler. The parser is now maintained by Nix community members. [rnix-parser]: https://github.com/nix-community/rnix-parser [rip]: https://www.redox-os.org/news/open-source-mental-health/ [tvixbolt]: https://tazj.in/blobs/tvixbolt/