check if a file exist to determine if full_feature

.gitignore

@@ -1 +1,2 @@
 /lazy-lock.json
+/_full_feature

README.md

@@ -9,3 +9,11 @@ Just clone this repository into directory `~/.config/nvim/` and start neovim. [l
 ```
 git clone <url of this repo> ~/.config/nvim
 ```
+
+By default, this config will only include a few plugins, which suit for mataining other than editing frequently.
+
+If you want to use the full feature this config provided, create a file named `_full_feature` under the root of this repo (usually `~/.config/nvim`.
+
+```
+touch ~/.config/nvim/_full_feature
+```

init.lua

@@ -24,7 +24,11 @@ vim.keymap.set("n", "<F3>", "<cmd>bdelete<CR>",      { silent = true })
 vim.g.mapleader = " "
 vim.g.maplocalleader = " "
 
-full_feature = false
+function file_exists(name)
+   local f=io.open(name,"r")
+   if f~=nil then io.close(f) return true else return false end
+end
+full_feature = file_exists(vim.fn.stdpath("config") .. "/_full_feature")
 
 -- Use lazy.nvim as plugin manager, and load plugin's config
 local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"