feat(nvim-plug): add on_ft support

bundle/nvim-plug/README.md

@@ -5,6 +5,8 @@
 [![](https://spacevim.org/img/build-with-SpaceVim.svg)](https://spacevim.org)
 [![GPLv3 License](https://img.spacevim.org/license-GPLv3-blue.svg)](LICENSE)
 
+**Alpha version. Any changes, including backward incompatible changes, are applied without announcements.**
+
 ## Usage
 
 ```lua
@@ -32,9 +34,11 @@ require("plug").add({
 ## Plugin Spec
 
 | name     | description                                             |
-| ------ | ------------------------------------------------------- |
+| -------- | ------------------------------------------------------- |
 | `[1]`    | `string`, plugin repo short name, `wsdjeg/flygrep.nvim` |
 | `cmds`   | `table<string>`, commands lazy loading                  |
+| `events` | `table<string>`, events lazy loading                    |
+| `on_ft`  | `table<string>`, filetypes lazy loading                 |
 
 ## Commands
 

bundle/nvim-plug/lua/plug/hooks.lua

@@ -1,18 +1,22 @@
 local M = {}
 
-local group = vim.api.nvim_create_augroup("plugin_hooks", { clear = true })
+local group = vim.api.nvim_create_augroup('plugin_hooks', { clear = true })
 
-local plugin_loader = require("plug.loader")
+local plugin_loader = require('plug.loader')
 
 local event_plugins = {}
 local cmd_plugins = {}
+local on_ft_plugins = {}
 
 function M.on_events(events, plugSpec)
   event_plugins[plugSpec.name] = vim.api.nvim_create_autocmd(events, {
     group = group,
-		pattern = { "*" },
+    pattern = { '*' },
     callback = function(_)
       vim.api.nvim_del_autocmd(event_plugins[plugSpec.name])
+      if on_ft_plugins[plugSpec.name] then
+        vim.api.nvim_del_autocmd(on_ft_plugins[plugSpec.name])
+      end
       plugin_loader.load(plugSpec)
     end,
   })
@@ -27,7 +31,7 @@ function M.on_cmds(cmds, plugSpec)
       plugin_loader.load(cmd_plugins[opt.name])
       vim.cmd(opt.name .. ' ' .. opt.args)
     end, {
-			nargs = "*",
+      nargs = '*',
       complete = function(...)
         return {}
       end,
@@ -35,4 +39,18 @@ function M.on_cmds(cmds, plugSpec)
   end
 end
 
+function M.on_ft(fts, plugSpec)
+  on_ft_plugins[plugSpec.name] = vim.api.nvim_create_autocmd({ 'FileType' }, {
+    group = group,
+    pattern = fts,
+    callback = function(_)
+      vim.api.nvim_del_autocmd(on_ft_plugins[plugSpec.name])
+      if event_plugins[plugSpec.name] then
+        vim.api.nvim_del_autocmd(event_plugins[plugSpec.name])
+      end
+      plugin_loader.load(plugSpec)
+    end,
+  })
+end
+
 return M

bundle/nvim-plug/lua/plug/init.lua

@@ -29,7 +29,11 @@ function M.add(plugins)
 			hooks.on_events(plug.events, plug)
 		end
 
-		if not plug.events and not plug.cmds then
+    if plug.on_ft then
+      hooks.on_ft(plug.on_ft, plug)
+    end
+
+		if not plug.events and not plug.cmds and not plug.on_ft then
 			loader.load(plug)
 		end
 	end