refactor: rewrite ruby provider in lua

runtime/autoload/provider/ruby.vim

@@ -1,73 +1,16 @@
-" The Ruby provider helper
 if exists('g:loaded_ruby_provider')
   finish
 endif
-let g:loaded_ruby_provider = 1
-
-function! provider#ruby#Detect() abort
-  let e = empty(s:prog) ? 'missing ruby or ruby-host' : ''
-  return [s:prog, e]
-endfunction
-
-function! provider#ruby#Prog() abort
-  return s:prog
-endfunction
 
 function! provider#ruby#Require(host) abort
-  let prog = provider#ruby#Prog()
-  let ruby_plugins = remote#host#PluginsForHost(a:host.name)
-
-  for plugin in ruby_plugins
-    let prog .= " " . shellescape(plugin.path)
-  endfor
-
-  return provider#Poll(prog, a:host.orig_name, '$NVIM_RUBY_LOG_FILE')
+  return v:lua.require'vim.provider.ruby'.require(a:host)
 endfunction
 
 function! provider#ruby#Call(method, args) abort
-  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))
+  return v:lua.require'vim.provider.ruby'.call(a:method, a:args)
 endfunction
 
-function! s:detect()
-  if exists("g:ruby_host_prog")
-    return expand(g:ruby_host_prog, v:true)
-  elseif has('win32')
-    return exepath('neovim-ruby-host.bat')
-  else
-    let p = exepath('neovim-ruby-host')
-    if empty(p)
-      return ''
-    endif
-    " neovim-ruby-host could be an rbenv shim for another Ruby version.
-    call system(p)
-    return v:shell_error ? '' : p
-  end
-endfunction
-
-let s:err = ''
-let s:prog = s:detect()
-let s:plugin_path = expand('<sfile>:p:h') . '/script_host.rb'
+let s:prog = v:lua.require'vim.provider.ruby'.detect()
 let g:loaded_ruby_provider = empty(s:prog) ? 1 : 2
-
-if g:loaded_ruby_provider != 2
-  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, [])
+let s:plugin_path = expand('<sfile>:p:h') . '/script_host.rb'
+call v:lua.require'vim.provider.ruby'.start(s:plugin_path)

runtime/lua/provider/ruby/health.lua

@@ -20,7 +20,7 @@ function M.check()
   end
   health.info('Ruby: ' .. health.system({ 'ruby', '-v' }))
 
-  local ruby_detect_table = vim.fn['provider#ruby#Detect']()
+  local ruby_detect_table = require('vim.provider.ruby').detect()
   local host = ruby_detect_table[1]
   if host:find('^%s*$') then
     health.warn('`neovim-ruby-host` not found.', {

runtime/lua/vim/provider/perl.lua

@@ -48,7 +48,7 @@ function M.call(method, args)
     local ok, result = pcall(vim.fn['remote#host#Require'], 'legacy-perl-provider') ---@type any, any
     if not ok then
       s_err = result
-      vim.api.nvim_echo({ result, 'WarningMsg' }, true, {})
+      vim.api.nvim_echo({ { result, 'WarningMsg' } }, true, {})
       return
     end
     s_host = result

runtime/lua/vim/provider/python.lua

@@ -132,7 +132,7 @@ function M.call(method, args)
     local ok, result = pcall(vim.fn['remote#host#Require'], 'legacy-python3-provider') ---@type any, any
     if not ok then
       s_err = result
-      vim.api.nvim_echo({ result, 'WarningMsg' }, true, {})
+      vim.api.nvim_echo({ { result, 'WarningMsg' } }, true, {})
       return
     end
     s_host = result

runtime/lua/vim/provider/ruby.lua

@@ -0,0 +1,61 @@
+local M = {}
+local s_err ---@type string?
+local s_host ---@type string?
+
+function M.require(host)
+  local prog = M.detect()
+  local args = { prog }
+  local ruby_plugins = vim.fn['remote#host#PluginsForHost'](host.name) ---@type any
+
+  ---@param plugin any
+  for _, plugin in ipairs(ruby_plugins) do
+    table.insert(args, plugin.path)
+  end
+
+  return vim.fn['provider#Poll'](args, host.orig_name, '$NVIM_RUBY_LOG_FILE')
+end
+
+function M.call(method, args)
+  if s_err then
+    return
+  end
+
+  if not s_host then
+    local ok, result = pcall(vim.fn['remote#host#Require'], 'legacy-ruby-provider') ---@type any, any
+    if not ok then
+      s_err = result
+      vim.api.nvim_echo({ { result, 'WarningMsg' } }, true, {})
+      return
+    end
+    s_host = result
+  end
+
+  return vim.fn.rpcrequest(s_host, 'ruby_' .. method, unpack(args))
+end
+
+function M.detect()
+  local prog ---@type string
+  if vim.g.ruby_host_prog then
+    prog = vim.fn.expand(vim.g.ruby_host_prog, true)
+  elseif vim.fn.has('win32') == 1 then
+    prog = vim.fn.exepath('neovim-ruby-host.bat')
+  else
+    local p = vim.fn.exepath('neovim-ruby-host')
+    if p == '' then
+      prog = ''
+    else
+      -- neovim-ruby-host could be an rbenv shim for another Ruby version.
+      vim.fn.system(p)
+      prog = vim.v.shell_error ~= 0 and '' or p
+    end
+  end
+  local err = prog == '' and 'missing ruby or ruby-host' or ''
+  return prog, err
+end
+
+function M.start(plugin_path)
+  vim.fn['remote#host#RegisterClone']('legacy-ruby-provider', 'ruby')
+  vim.fn['remote#host#RegisterPlugin']('legacy-ruby-provider', plugin_path, {})
+end
+
+return M

test/functional/helpers.lua

@@ -936,17 +936,14 @@ end
 --- @param provider string
 --- @return string|boolean?
 function module.missing_provider(provider)
-  if provider == 'ruby' then
+  if provider == 'ruby' or provider == 'perl' then
     --- @type string?
-    local e = module.fn['provider#ruby#Detect']()[2]
+    local e = module.exec_lua("return {require('vim.provider." .. provider .. "').detect()}")[2]
     return e ~= '' and e or false
   elseif provider == 'node' then
     --- @type string?
     local e = module.fn['provider#node#Detect']()[2]
     return e ~= '' and e or false
-  elseif provider == 'perl' then
-    --- @type string?
-    return module.exec_lua([[return {require('vim.provider.perl').detect()}]])[2]
   elseif provider == 'python' then
     return module.exec_lua([[return {require('vim.provider.python').detect_by_module('neovim')}]])[2]
   end