How to set neovim's g:ruby_host_prog to use chruby?

[pjg]

I'm trying to have my local ruby used/detected by graphical neovim MacOS applications (goneovim or VimR).

I'm trying things like:

let g:ruby_host_prog = '~/bin/chruby-wrapper ~/.gem/ruby/3.1.4/bin/neovim-ruby-host'

But this doesn't work. Any help appreciated.

My chruby-wrapper is based on this.

In particular, this documentation could be updated to describe how one can use chruby to set g:ruby_host_prog: https://neovim.io/doc/user/provider.html#provider-ruby

[pjg]

I was able to make this work in command line nvim with the following configuration:

let g:ruby_host_prog = '~/bin/chruby-wrapper'

and chruby-wrapper looking like this:

#!/bin/zsh

if [ -d /usr/local/share/chruby ]; then
  # amd64
  source /usr/local/share/chruby/chruby.sh
  source /usr/local/share/chruby/auto.sh
elif [ -d /opt/homebrew/share/chruby ]; then
  # arm64
  source /opt/homebrew/share/chruby/chruby.sh
  source /opt/homebrew/share/chruby/auto.sh
fi

chruby_auto

# original call
exec "ruby" "$@"

In order to make this work in goneovim/VimR one more trick is required. Those MacOS applications will not read ~/.zshrc while running as this file is only read for interactive shells (reference). As such we need to add automatic ruby selection via chruby into ~/.zprofile, which is being read while running goneovim/VimR. Here is the relevant bit from my ~/.zprofile file:

# RUBY version switching

# chruby / rvm (load either one conditionally)
if [ -d /usr/local/share/chruby ]; then
  # chruby (amd64)
  source /usr/local/share/chruby/chruby.sh
  source /usr/local/share/chruby/auto.sh
elif [ -d /opt/homebrew/share/chruby ]; then
  # chruby (arm64)
  source /opt/homebrew/share/chruby/chruby.sh
  source /opt/homebrew/share/chruby/auto.sh
fi

# Automatically switch to the ruby version specified in the .ruby-version file
# present in the current directory
chruby_auto

It is also necessary to run goneovim/VimR from the command line while being in your project's directory:

cd ~/my-project
goneovim

Commit in my dotfiles.