One engine, many tools — Introducing Rubydex | Rails at Scale

Introducing Rubydex — a portable static analysis engine powering Ruby LSP, Tapioca, Packwerk, and more. One foundation, compounding benefits for the whole ecosystem.A few years ago, the new Ruby parser Prism was released. One of its primary goals was to unify the community since we had multiple implementations of Ruby parsers, each with their own bugs, differences in implementation and portability. By having a single parser, community investments in performance and correctness benefit every single tool built on top of it (including Ruby itself!). However, the story of repeated implementations of highly complex foundational blocks doesn’t end at the parser level. Move one level up the stack and the pattern repeats. Today, we have multiple tools that implement code indexing and related static analysis algorithms. Consider just a few examples:.