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Find in AST - Search and refactor code directly in Abstract Syntax Tree as you do with grep for strings (by jonatas)
Some of these tools have even already been wrapped, like Jonatas's work on FFast which works on top of NodePattern and some of RuboCop's previous work. Really the only things between us and this future is a bit more wrapping and polish, as well as integrations into something like VSCode.
A RuboCop extension focused on enforcing Rails best practices and coding conventions.
Let's take a glance at the action_filter cop real quick here, but just a quick part of it:
Static code analysis for 29 languages.. Your projects are multi-language. So is SonarQube analysis. Find Bugs, Vulnerabilities, Security Hotspots, and Code Smells so you can release quality code every time. Get started analyzing your projects today for free.
Ruby Next makes modern Ruby code run in older versions and alternative implementations
As it would happen, the folks behind Ruby Next have some ideas here, and have done a significant amount of work in enabling this very vision to become a reality.
Turn Ruby AST into semantically equivalent Ruby source
There are already some techniques capable of doing just this, by combining Parser with Unparser, but of course such things can only be done on Ruby files read in rather than in a REPL session which is where a lot more fun could happen.
RuboCoping with legacy: Bring your Ruby code up to Standard
2 projects | /r/ruby | 5 Apr 2023
Ruby 2.7.8 Released
1 project | /r/ruby | 1 Apr 2023
Nice Ruby IDEs
2 projects | /r/ruby | 24 Mar 2023
Rubocop: The Sheriff of Your Codebase
1 project | dev.to | 24 Feb 2023
GitHub - saturnflyer/polyfill-data: Adds the Ruby 3.2 Data class to lower Ruby versions
2 projects | /r/ruby | 19 Jan 2023