Missing Neovim RubyGem

Question

I've just installed neovim and I have problem with RubyGem.

Output of :CheckHealth indicates missing neovim RubyGem:

## Ruby provider
  - ERROR: Missing Neovim RubyGem
      - SUGGESTIONS:
        - Install or upgrade the neovim RubyGem using `gem install neovim`.
  - INFO: Ruby Version: ruby 2.2.6p396 (2016-11-15 revision 56800) [x86_64-linux]
  - INFO: Host Executable: not found
  - INFO: Host Version: not found

After installing sudo gem install neovim:

Successfully installed neovim-0.3.1
Parsing documentation for neovim-0.3.1
Done installing documentation for neovim after 0 seconds
1 gem installed

The output of :CheckHealth is the same as before:

## Ruby provider
  - ERROR: Missing Neovim RubyGem
      - SUGGESTIONS:
        - Install or upgrade the neovim RubyGem using `gem install neovim`.
  - INFO: Ruby Version: ruby 2.2.6p396 (2016-11-15 revision 56800) [x86_64-linux]
  - INFO: Host Executable: not found
  - INFO: Host Version: not found

Am I missing something? How can I fix this problem?

:echo has('ruby') returns 1

Thank you very much.

Answer 1

You may need to add the PATH of installed gems into your PATH.

You can do it like below in your .bashrc or .bash_profile or other shells' rc/profile files.

[ -d $HOME/.gem/ruby/2.4.0/bin ] && PATH=$HOME/.gem/ruby/2.4.0/bin:$PATH

export PATH together with all other PATH values.

Answer 2

I discovered, on OpenSUSE that the binary file is renamed when installing the gem. So on my computer I need to set have this line in my init.vim

let g:ruby_host_prog="/usr/bin/neovim-ruby-host.ruby2.4"