feat(nvim-plug): add fetch option

bundle/nvim-plug/README.md

@@ -13,6 +13,7 @@
   - [Installation](#installation)
   - [Setup nvim-plug](#setup-nvim-plug)
   - [Add plugins](#add-plugins)
+  - [Self upgrade](#self-upgrade)
 - [Plugin Spec](#plugin-spec)
 - [Commands](#commands)
 - [Default UI](#default-ui)
@@ -129,12 +130,40 @@ require('plug').add({
 })
 ```
 
+### Self upgrade
+
+you can use nvim-plug to manager nvim-plug:
+
+```lua
+if vim.fn.isdirectory('D:/bundle_dir/wsdjeg/nvim-plug') == 0 then
+  vim.fn.system({
+    'git',
+    'clone',
+    '--depth',
+    '1',
+    'https://github.com/wsdjeg/nvim-plug.git',
+    'D:/bundle_dir/wsdjeg/nvim-plug',
+  })
+end
+vim.opt.runtimepath:append('D:/bundle_dir/wsdjeg/nvim-plug')
+require('plug').setup({
+  -- set the bundle dir
+  bundle_dir = 'D:/bundle_dir',
+})
+require('plug').add({
+  {
+    'wsdjeg/nvim-plug',
+    fetch = true,
+  },
+})
+```
+
 ## Plugin Spec
 
 The plugin spec is inspired by [dein.nvim](https://github.com/Shougo/dein.vim).
 
 | name            | description                                                                                                      |
-| --------------- | ------------------------------------------------------------------------------------------------------------- |
+| --------------- | ---------------------------------------------------------------------------------------------------------------- |
 | `[1]`           | `string`, plugin repo short name, `wsdjeg/flygrep.nvim`                                                          |
 | `cmds`          | `string` or `table<string>`, commands lazy loading                                                               |
 | `events`        | `string` or `table<string>`, events lazy loading                                                                 |
@@ -154,6 +183,7 @@ The plugin spec is inspired by [dein.nvim](https://github.com/Shougo/dein.vim).
 | `type`          | `string` specific plugin type, this can be git, raw or none, if it is raw, `script_type` must be set             |
 | `autoload`      | `boolean`, load plugin after git clone                                                                           |
 | `priority`      | `number`, default is 50, set the order in which plugins are loaded                                               |
+| `fetch`         | If set to true, nvim-plug doesn't add the path to user runtimepath. It is useful to manager no-plugin repository |
 
 - `config` and `config_after` function will be not be called if the plugin has not been installed.
 - `priority` does not work for lazy plugins.

bundle/nvim-plug/lua/plug/loader.lua

@@ -32,6 +32,7 @@ local loaded_plugins = {}
 --- @field config_after function function called after update rtp
 --- @field hook_install_done? function
 --- @field autoload? boolean
+--- @field fetch? boolean If set to true, nvim-plug doesn't add the path to user runtimepath, and doesn't load the bundle
 
 --- @param plugSpec PluginSpec
 --- @return boolean
@@ -95,7 +96,7 @@ function M.parser(plugSpec)
     plugSpec.path = config.bundle_dir .. '/' .. plugSpec[1] .. '/plugin'
     plugSpec.url = config.base_url .. '/' .. plugSpec[1]
   end
-  if type(plugSpec.autoload) == 'nil' and plugSpec.type ~= 'raw' then
+  if type(plugSpec.autoload) == 'nil' and plugSpec.type ~= 'raw' and not plugSpec.fetch then
     plugSpec.autoload = true
   end
 
@@ -111,6 +112,7 @@ function M.load(plugSpec)
     plugSpec.rtp
     and vim.fn.isdirectory(plugSpec.rtp) == 1
     and not loaded_plugins[plugSpec.name]
+    and not plugSpec.fetch
   then
     vim.opt.runtimepath:append(plugSpec.rtp)
     loaded_plugins[plugSpec.name] = true

bundle/nvim-plug/test/init.lua

@@ -42,6 +42,10 @@ require('plug').add({
     'wsdjeg/git.vim',
     cmds = { 'Git' },
   },
+  {
+    'wsdjeg/nvim-plug',
+    fetch = true,
+  },
   {
     'wsdjeg/JavaUnit.vim',
     cmds = { 'JavaUnit' },