rubyfmt VS plugin-ruby

We're using rubyfmt along with a rubocop config which does its best to strip out any styling decisions.

Looked at https://github.com/penelopezone/rubyfmt and other options but none seem to actually work.

RubyFmt is a brand-new code formatter that's written in Rust and currently under active development. Like Prettier, it is intended to be a formatter and not a code analysis tool. It hasn't seen a stable release just yet, so you should probably hold off on adopting it right now, but it's definitely one to keep an eye on.

Another example: code formatters. You mention gofmt (which you incorrectly put next to Ruby even though it's for Go)... There are lots of code formatters for Ruby, even if you only consider ones directly inspired/influenced by gofmt. A quick google turned up at least three of those: https://github.com/pariz/rubo-format, https://github.com/penelopezone/rubyfmt, and https://github.com/ruby-formatter/rufo. I'm pretty sure rubocop is used in Ruby more than any of those, but rubocop is less directly influenced by gofmt. So what do you choose? The project(s) that's more closely analogous? Or the more popular formatter?

Prettier started out as an opinionated code formatter for JavaScript, but it now supports many other languages, including Ruby. Installing its Ruby plugin is straight forward: add the prettier gem to your Gemfile and then run bundle.

You'd need a prettier plugin for Lua, similar to the ones that exist for php (https://github.com/prettier/plugin-php) and ruby (https://github.com/prettier/plugin-ruby). I'm pretty sure that there isn't one for Lua, but you can try googling it.

Did you try prettier maybe?

To me "stardard" ruby style is style used in the std-lib.

Whilst I can see the benefit of having an AST format code for you, e.g. if can you use it to fix language version changes like positional arguments and keyword arguments in Ruby 3,.0 I worry about how good/bad RuboCop is at formatting.

Last time I tried it, it was indenting in a different way to the std-lib.

At the time I found that prettier-ruby[1] did a much better job. Hopefully that's improved since.

1. https://github.com/prettier/plugin-ruby

Rubocop has a very nice auto-correct feature to automatically fix many of the warnings it gives, but we've noticed in the past that with line length issues specifically the auto-corrected files can be misformatted. For that reason, we use the Ruby plugin for Prettier to correct line length.