feat(nvim-plug): add on_func option

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

@@ -7,6 +7,7 @@ local plugin_loader = require('plug.loader')
 local event_plugins = {}
 local cmd_plugins = {}
 local on_ft_plugins = {}
+local on_fn_plugins = {}
 
 function M.on_events(events, plugSpec)
   event_plugins[plugSpec.name] = vim.api.nvim_create_autocmd(events, {
@@ -88,4 +89,25 @@ function M.on_map(maps, plugSpec)
   end
 end
 
+function M.on_func(fn, plugSpec)
+  local fns
+  if type(fn) == 'table' then
+    fns = fn
+  elseif type(fn) == 'string' then
+    fns = { fn }
+  end
+  on_fn_plugins[plugSpec.name] = vim.api.nvim_create_autocmd({ 'FuncUndefined' }, {
+    group = group,
+    pattern = fns,
+    callback = function(_)
+
+      if on_fn_plugins[plugSpec.name] then
+        vim.api.nvim_del_autocmd(on_fn_plugins[plugSpec.name])
+      end
+      plugin_loader.load(plugSpec)
+
+    end,
+  })
+end
+
 return M

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

@@ -40,7 +40,17 @@ function M.add(plugins)
       hooks.on_map(plug.on_map, plug)
     end
 
-    if not plug.events and not plug.cmds and not plug.on_ft and not plug.on_map then
+    if plug.on_func then
+      hooks.on_func(plug.on_func, plug)
+    end
+
+    if
+      not plug.events
+      and not plug.cmds
+      and not plug.on_ft
+      and not plug.on_map
+      and not plug.on_func
+    then
       loader.load(plug)
     end
     ::continue::