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Show HN: Run – a CLI universal code runner I built while learning Rust

(github.com)
96 points esubaalew | 2 comments | 04 Oct 25 18:34 UTC | HN request time: 0.402s | source

Hi HN — I’m learning Rust and decided to build a universal CLI for running code in many languages. The tool, Run, aims to be a single, minimal dependency utility for: running one-off snippets (from CLI flags), running files, reading and executing piped stdin, and providing language-specific REPLs that you can switch between interactively.

I designed it to support both interpreted languages (Python, JS, Ruby, etc.) and compiled languages (Rust, Go, C/C++). It detects languages from flags or file extensions, can compile temporary files for compiled languages, and exposes a unified REPL experience with commands like :help, :lang, and :quit.

Install: cargo install run-kit (or use the platform downloads on GitHub). Source & releases: https://github.com/Esubaalew/run

I used Rust while following the official learning resources and used AI to speed up development, so I expect there are bugs and rough edges. I’d love feedback on: usability and UX of the REPL, edge cases for piping input to language runtimes, security considerations (sandboxing/resource limits), packaging and cross-platform distribution.

Thanks — I’ll try to answer questions and share design notes.

1. xk3 ◴[05 Oct 25 17:37 UTC] No.45483544[source]▶
This lets you read and write variables between different languages, right? Otherwise... what's the point? Can it really compete with something like IPython or yaegi?

But if only to learn rust, this is more interesting than building another "todo list" app

replies(1): >>45483806 #
2. esubaalew ◴[05 Oct 25 18:13 UTC] No.45483806[source]▶
Cool point it is not about comparing run-kit with ipython and they are different things. Ipython is about python and mine is about different languages. And btw I am adding variables between different languages