This is a human, WIP, and clean implementation of an AWK interpreter, written in Rust and compatible with GNU's AWK (gawk) bug-for-bug. Expected to be production-ready before Ubuntu 26.10. Made with love.

State of the Repo

Lexer

Pretty much done; lacking a POSIX-compatibility mode (trivial) and arena integration (trivial).

Parser

Also mostly done; some bullet points:

Rough edges around error handling on expected tokens.
Preprocessor is TBD.
The Pratt routine is a bit spaghetti and should be refactored (trivial).
Missing getline expressions and command redirections (trivial).
We are working on test coverage and fuzzing.
It would be nice to reduce LOC; maybe we get rid of S-expr debug output.

Interpreter

TBD; work on it will be started once we get good testing on the parser. Ideally, the design should be a bytecode machine or a JIT. Expect this to be a fast-paced repo.

Contributing

See this.

License

This is licensed under either the MIT License or the Apache License v2.0. See the LICENSE-MIT and LICENSE-APACHE files for details.