1 files changed, 40 insertions, 10 deletions
diff --git a/runtime/autoload/provider/ruby.vim b/runtime/autoload/provider/ruby.vim
index aad8c09d28..e9130b98c1 100644
--- a/runtime/autoload/provider/ruby.vim
+++ b/runtime/autoload/provider/ruby.vim
@@ -1,12 +1,18 @@
 " The Ruby provider helper
-if exists('s:loaded_ruby_provider')
+if exists('g:loaded_ruby_provider')
   finish
 endif
+let g:loaded_ruby_provider = 1
 
-let s:loaded_ruby_provider = 1
+function! provider#ruby#Detect() abort
+  return exepath('neovim-ruby-host')
+endfunction
+
+function! provider#ruby#Prog()
+  return s:prog
+endfunction
 
 function! provider#ruby#Require(host) abort
-  " Collect registered Ruby plugins into args
   let args = []
   let ruby_plugins = remote#host#PluginsForHost(a:host.name)
 
@@ -16,19 +22,43 @@ function! provider#ruby#Require(host) abort
 
   try
     let channel_id = rpcstart(provider#ruby#Prog(), args)
-
-    if rpcrequest(channel_id, 'poll') == 'ok'
+    if rpcrequest(channel_id, 'poll') ==# 'ok'
       return channel_id
     endif
   catch
     echomsg v:throwpoint
     echomsg v:exception
   endtry
-
-  throw remote#host#LoadErrorForHost(a:host.orig_name,
-        \ '$NVIM_RUBY_LOG_FILE')
+  throw remote#host#LoadErrorForHost(a:host.orig_name, '$NVIM_RUBY_LOG_FILE')
 endfunction
 
-function! provider#ruby#Prog() abort
-  return 'neovim-ruby-host'
+function! provider#ruby#Call(method, args)
+  if s:err != ''
+    echoerr s:err
+    return
+  endif
+
+  if !exists('s:host')
+    try
+      let s:host = remote#host#Require('legacy-ruby-provider')
+    catch
+      let s:err = v:exception
+      echohl WarningMsg
+      echomsg v:exception
+      echohl None
+      return
+    endtry
+  endif
+  return call('rpcrequest', insert(insert(a:args, 'ruby_'.a:method), s:host))
 endfunction
+
+let s:err = ''
+let s:prog = provider#ruby#Detect()
+let s:plugin_path = expand('<sfile>:p:h') . '/script_host.rb'
+
+if empty(s:prog)
+  let s:err = 'Cannot find the neovim RubyGem. Try :CheckHealth'
+endif
+
+call remote#host#RegisterClone('legacy-ruby-provider', 'ruby')
+call remote#host#RegisterPlugin('legacy-ruby-provider', s:plugin_path, [])