feat(nvim-plug): check hlexists

Author: wsdjeg

bundle/nvim-plug/README.md

@@ -14,14 +14,15 @@
 - [Commands](#commands)
 - [Default UI](#default-ui)
 - [Custom Plugin UI](#custom-plugin-ui)
-  - [Plugin priority](#plugin-priority)
+- [Plugin priority](#plugin-priority)
 - [Feedback](#feedback)
 
 <!-- vim-markdown-toc -->
 
 ## Intro
 
-nvim-plug is an asynchronous Neovim plugin manager written in Lua. There is also a [Chinese introduction](https://wsdjeg.net/neovim-plugin-manager-nvim-plug/) about nvim-plug.
+nvim-plug is an asynchronous Neovim plugin manager written in Lua.
+There is also a [Chinese introduction](https://wsdjeg.net/neovim-plugin-manager-nvim-plug/) about this plugin.
 
 ## Features
 
@@ -184,7 +185,7 @@ require('plug').setup({
 })
 ```
 
-### Plugin priority
+## Plugin priority
 
 By default this feature is disabled, plugins will be loaded when run `add({plugins})` function.
 To enable plugin priority feature, you need to call `plug.load()` after `plug.add()` function.

bundle/nvim-plug/lua/plug/ui.lua

@@ -101,11 +101,21 @@ M.open = function()
     vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, build_context())
   end
   --- setup highlight
-  vim.cmd('hi def link PlugTitle TODO')
-  vim.cmd('hi def link PlugProcess Repeat')
-  vim.cmd('hi def link PlugDone Type')
-  vim.cmd('hi def link PlugFailed WarningMsg')
-  vim.cmd('hi def link PlugDoing Number')
+  if vim.fn.hlexists('PlugTitle') == 0 then
+    vim.cmd('hi def link PlugTitle TODO')
+  end
+  if vim.fn.hlexists('PlugProcess') == 0 then
+    vim.cmd('hi def link PlugProcess Repeat')
+  end
+  if vim.fn.hlexists('PlugDone') == 0 then
+    vim.cmd('hi def link PlugDone Type')
+  end
+  if vim.fn.hlexists('PlugFailed') == 0 then
+    vim.cmd('hi def link PlugFailed WarningMsg')
+  end
+  if vim.fn.hlexists('PlugDoing') == 0 then
+    vim.cmd('hi def link PlugDoing Number')
+  end
   vim.fn.matchadd('PlugTitle', '^Plugins.*', 2, -1, { window = winid })
   vim.fn.matchadd('PlugProcess', '^\\[\\zs=*', 2, -1, { window = winid })
   vim.fn.matchadd('PlugDone', '^√.*', 2, -1, { window = winid })