perf(neovim): use nvim-cmp & skip checking python

autoload/SpaceVim.vim

@@ -362,7 +362,9 @@ let g:spacevim_leader_guide_theme = 'leaderguide'
 "   let g:spacevim_enable_key_frequency = 1
 " <
 let g:spacevim_enable_key_frequency = 0
-if (has('python3') 
+if has('nvim-0.9.0')
+  let g:spacevim_autocomplete_method = 'nvim-cmp'
+elseif (has('python3') 
       \ && (SpaceVim#util#haspy3lib('neovim')
       \ || SpaceVim#util#haspy3lib('pynvim'))) &&
       \ (has('nvim') || (has('patch-8.0.0027')))
@@ -372,7 +374,9 @@ if (has('python3')
   " @parentsection options
   " Set the autocomplete engine of spacevim, the default logic is:
   " >
-  "   if has('python3')
+  "   if has('nvim-0.9.0')
+  "     let g:spacevim_autocomplete_method = 'nvim-cmp'
+  "   elseif has('python3')
   "     let g:spacevim_autocomplete_method = 'deoplete'
   "   elseif has('lua')
   "     let g:spacevim_autocomplete_method = 'neocomplete'
@@ -392,7 +396,9 @@ if (has('python3')
   ""
   " Set the autocomplete engine of spacevim, the default logic is:
   " >
-  "   if has('python3')
+  "   if has('nvim-0.9.0')
+  "     let g:spacevim_autocomplete_method = 'nvim-cmp'
+  "   elseif has('python3')
   "     let g:spacevim_autocomplete_method = 'deoplete'
   "   elseif has('lua')
   "     let g:spacevim_autocomplete_method = 'neocomplete'

doc/SpaceVim.txt

@@ -325,7 +325,9 @@ AUTOCOMPLETE_METHOD                     *SpaceVim-options-autocomplete_method*
 
 Set the autocomplete engine of spacevim, the default logic is:
 >
-  if has('python3')
+  if has('nvim-0.9.0')
+    let g:spacevim_autocomplete_method = 'nvim-cmp'
+  elseif has('python3')
     let g:spacevim_autocomplete_method = 'deoplete'
   elseif has('lua')
     let g:spacevim_autocomplete_method = 'neocomplete'
@@ -1154,7 +1156,9 @@ enable it:
                                               *g:spacevim_autocomplete_method*
 Set the autocomplete engine of spacevim, the default logic is:
 >
-  if has('python3')
+  if has('nvim-0.9.0')
+    let g:spacevim_autocomplete_method = 'nvim-cmp'
+  elseif has('python3')
     let g:spacevim_autocomplete_method = 'deoplete'
   elseif has('lua')
     let g:spacevim_autocomplete_method = 'neocomplete'

docs/cn/layers/autocomplete.md

@@ -62,6 +62,7 @@ SpaceVim 选项 `snippet_engine` 设置为 `ultisnips`，将使用 [UltiSnips](h
   - `deoplete`
   - `asyncomplete`
   - `completor`
+  - `nvim-cmp`
 
 设置示例：
 

docs/layers/autocomplete.md

@@ -27,6 +27,7 @@ This layer provides auto-completion in SpaceVim.
 
 The following completion engines are supported:
 
+- nvim-cmp - neovim >= 0.9.0
 - [neocomplete](https://github.com/Shougo/neocomplete.vim) - vim with `+lua`
 - [neocomplcache](https://github.com/Shougo/neocomplcache.vim) - vim without `+lua`
 - [deoplete](https://github.com/Shougo/deoplete.nvim) - neovim with `+python3`
@@ -60,6 +61,7 @@ But you can choose the completion engine to be used with the following variable:
   - `deoplete`
   - `asyncomplete`
   - `completor`
+  - `nvim-cmp`
 
 here is an example: