rush

RUst SHell: a posixy shell implemented in Rust with minimal external dependencies.

Q: Why another shell in Rust?

A: Existing shell projects (a) aim to be 'a better shell', and (b) have a lot of dependencies, so they cannot be easily ported to non-standard OSes; and even non-standard OSes often need interactive shells.

Goals

• A simple interactive shell with a familiar subset of standard shell functionality;
• Minimal external dependencies and thus easily portable;
• To eventually comply, as much as posible, with the spec.

Non-goals

• To be better than X (sh, bash, etc). The main purpose of this project is simplicity and portability.

How to use

• Just do a 'cargo run';
• Try various commands;
• File bug reports;
• Type 'exit' or 'quit'.

What works

• Basic line editing (arrows, home/end, del/backspace, basic history);
• Command piping (e.g. 'ls | wc -l');
• Globbing (e.g. "ls src/*.rs") (using glob crate).

TODO

• Non-interactive mode (batch processing);
• Variables, environment, loops, eval, etc.

Contributions:

• Are welcome;
• If you plan to add a large feature or make a non-trivial refactoring, please discuss your approach first.