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ale
Check syntax in Vim/Neovim asynchronously and fix files, with Language Server Protocol (LSP) support
So the weirdest part is that the OP is literally just a cut and paste of a bunch of scripts found in the ruby distribution "samples" folder (that I had no idea even existed).
That pretty not great ruby wasn't written by the author -- it's actually included in a "sample" file with the ruby distro?
https://github.com/ruby/ruby/blob/ruby_3_1/sample/dir.rb
A file whose commit history shows... it's part of the very first commit recorded in git history, in 1998 by matz, the original author of ruby.
I have no idea what's going on in that "sample" folder, very weird.
The OP is simply regurgitating the weird "sample" folder.
If you're looking for IDE-level language assistance, I can't help you, but since you mentioned nvim: I use regular vim with CoC / Conquer of Completion (vim plugin; LSP server, may not strictly be necessary for nvim), Solargraph (Ruby Gem; language server), and Rubocop (also a Gem) for linting. I previously/still use ALE (vim plugin; Asynchronous Lint Engine) because I haven't gotten CoC+Solargraph to play nice with Rubocop, probably due to something silly.
https://github.com/neoclide/coc.nvim
https://solargraph.org/
https://rubocop.org/
https://github.com/dense-analysis/ale
My impression with all of this running under MacVim... it's plenty responsive. It can take a while for Solargraph to index everything on startup if you're working in a big project; once it loads, it's snappy. (There's probably a way to cache that startup scan.)
If you're looking for IDE-level language assistance, I can't help you, but since you mentioned nvim: I use regular vim with CoC / Conquer of Completion (vim plugin; LSP server, may not strictly be necessary for nvim), Solargraph (Ruby Gem; language server), and Rubocop (also a Gem) for linting. I previously/still use ALE (vim plugin; Asynchronous Lint Engine) because I haven't gotten CoC+Solargraph to play nice with Rubocop, probably due to something silly.
https://github.com/neoclide/coc.nvim
https://solargraph.org/
https://rubocop.org/
https://github.com/dense-analysis/ale
My impression with all of this running under MacVim... it's plenty responsive. It can take a while for Solargraph to index everything on startup if you're working in a big project; once it loads, it's snappy. (There's probably a way to cache that startup scan.)
If you're looking for IDE-level language assistance, I can't help you, but since you mentioned nvim: I use regular vim with CoC / Conquer of Completion (vim plugin; LSP server, may not strictly be necessary for nvim), Solargraph (Ruby Gem; language server), and Rubocop (also a Gem) for linting. I previously/still use ALE (vim plugin; Asynchronous Lint Engine) because I haven't gotten CoC+Solargraph to play nice with Rubocop, probably due to something silly.
https://github.com/neoclide/coc.nvim
https://solargraph.org/
https://rubocop.org/
https://github.com/dense-analysis/ale
My impression with all of this running under MacVim... it's plenty responsive. It can take a while for Solargraph to index everything on startup if you're working in a big project; once it loads, it's snappy. (There's probably a way to cache that startup scan.)