make dashboard-nvim an opt plugin

Transition from init.vim to init.lua

README.md

@@ -36,7 +36,7 @@
 # Introduction
 
 This repo hosts my Nvim configuration for Linux, macOS, and Windows.
-`init.vim` is the config entry point for terminal Nvim,
+`init.lua` is the config entry point for terminal Nvim,
 and `ginit.vim` is the additional config file for [GUI client of Nvim](https://github.com/neovim/neovim/wiki/Related-projects#gui).
 
 My configurations are heavily documented to make it as clear as possible.

core/mappings.vim

@@ -87,7 +87,7 @@ xnoremap > >gv
 inoremap <expr> <tab> pumvisible() ? "\<c-n>" : "\<tab>"
 inoremap <expr> <s-tab> pumvisible() ? "\<c-p>" : "\<s-tab>"
 
-" Edit and reload init.vim quickly
+" Edit and reload nvim config file quickly
 nnoremap <silent> <leader>ev :<C-U>tabnew $MYVIMRC <bar> tcd %:h<cr>
 nnoremap <silent> <leader>sv :<C-U>silent update $MYVIMRC <bar> source $MYVIMRC <bar>
       \ call v:lua.vim.notify("Nvim config successfully reloaded!", 'info', {'title': 'nvim-config'})<cr>

init.lua

@@ -0,0 +1,34 @@
+-- This is my personal Nvim configuration supporting Mac, Linux and Windows, with various plugins configured.
+-- This configuration evolves as I learn more about Nvim and become more proficient in using Nvim.
+-- Since it is very long (more than 1000 lines!), you should read it carefully and take only the settings that suit you.
+-- I would not recommend cloning this repo and replace your own config. Good configurations are personal,
+-- built over time with a lot of polish.
+--
+-- Author: Jie-dong Hao
+-- Email: jdhao@hotmail.com
+-- Blog: https://jdhao.github.io/
+
+local utils = require "utils"
+local match_res = utils.check_version_match()
+
+if not match_res.match then
+  local msg = string.format("Nvim version mistmatch: %s expected, but got %s instead!", match_res.expected, match_res.actual)
+  vim.api.nvim_echo({ { msg, "ErrorMsg" } }, false, {})
+  return
+end
+
+local core_conf_files = {
+  "globals.vim",
+  "options.vim",
+  "autocommands.vim",
+  "mappings.vim",
+  "plugins.vim",
+  "themes.vim",
+}
+
+-- source all the core config files
+for _, name in ipairs(core_conf_files) do
+  local path = string.format("%s/core/%s", vim.fn.stdpath('config'), name)
+  local source_cmd = "source " .. path
+  vim.cmd(source_cmd)
+end

init.vim

@@ -1,31 +0,0 @@
-" This is my personal Nvim configuration supporting Mac, Linux and Windows, with various plugins configured.
-" This configuration evolves as I learn more about Nvim and become more proficient in using Nvim.
-" Since it is very long (more than 1000 lines!), you should read it carefully and take only the settings that suit you.
-" I would not recommend cloning this repo and replace your own config. Good configurations are personal,
-" built over time with a lot of polish.
-"
-" Author: Jie-dong Hao
-" Email: jdhao@hotmail.com
-" Blog: https://jdhao.github.io/
-
-" check if we have the lastest stable version of nvim
-let s:expect_ver = printf('nvim-%s', '0.7.2')
-let s:actual_ver = matchstr(execute('version'), 'NVIM v\zs[^\n]*')
-
-if !has(s:expect_ver)
-  echohl Error | echomsg printf("%s required, but got nvim %s!", s:expect_ver, s:actual_ver) | echohl None
-  finish
-endif
-
-let s:core_conf_files = [
-      \ 'globals.vim',
-      \ 'options.vim',
-      \ 'autocommands.vim',
-      \ 'mappings.vim',
-      \ 'plugins.vim',
-      \ 'themes.vim'
-      \ ]
-
-for s:fname in s:core_conf_files
-  execute printf('source %s/core/%s', stdpath('config'), s:fname)
-endfor

lua/plugins.lua

@@ -139,7 +139,7 @@ packer.startup({
     use({ "akinsho/bufferline.nvim", event = "VimEnter", config = [[require('config.bufferline')]] })
 
     -- fancy start screen
-    use { 'glepnir/dashboard-nvim', config = [[require('config.dashboard-nvim')]] }
+    use { 'glepnir/dashboard-nvim', event = "VimEnter", config = [[require('config.dashboard-nvim')]] }
 
     use({
       "lukas-reineke/indent-blankline.nvim",

lua/utils.lua

@@ -25,4 +25,23 @@ function M.may_create_dir()
   end
 end
 
+function M.check_version_match()
+  -- check if we have the lastest stable version of nvim
+  local expected_ver = {major = 0, minor = 7, patch = 2}
+  local actual_ver = vim.version()
+
+  local ver_match = true
+  for key, val in pairs(expected_ver) do
+    if val ~= actual_ver[key] then
+      ver_match = false
+      break
+    end
+  end
+
+  local expect_ver_str = string.format("%s.%s.%s", expected_ver.major, expected_ver.minor, expected_ver.patch)
+  local nvim_ver_str = string.format("%s.%s.%s", actual_ver.major, actual_ver.minor, actual_ver.patch)
+
+  return {match=ver_match, expected=expect_ver_str, actual=nvim_ver_str}
+end
+
 return M