I've been working on Shelgon, a framework that lets you build your own custom REPL shells and interactive CLI applications in Rust.
You can use Shelgon to:
- Create a custom shell with only a few lines of code - Build interactive debugging tools with persistent state between commands - Develop domain-specific language interpreters with shell-like interfaces - Add REPL capabilities to existing applications
Getting started is straightforward - implement a single trait that handles your command execution logic, and Shelgon takes care of the terminal UI, input handling, and async runtime integration.
For example, a simple echo shell takes less than 50 lines of code, including a full implementation of command history, cursor movement, and tab completion.
Repository: https://github.com/nishantjoshi00/shelgon
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