Merge pull request #109 from jdhao/spell

update spell

.stylua.toml

@@ -0,0 +1,6 @@
+# config for stylua, ref: https://github.com/JohnnyMorganz/StyLua
+line_endings = "Unix"
+indent_type = "Spaces"
+indent_width = 2
+quote_style = "AutoPreferDouble"
+call_parentheses= "NoSingleTable"

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.
@@ -74,7 +74,7 @@ and how to set up on different platforms (Linux, macOS, and Windows).
 + Asynchronous code execution via [asyncrun.vim](https://github.com/skywind3000/asyncrun.vim).
 + Code highlighting via [nvim-treesitter](https://github.com/nvim-treesitter/nvim-treesitter).
 + Code editing using true nvim inside browser via [firenvim](https://github.com/glacambre/firenvim).
-+ Color theme via [vim-gruvbox8](https://github.com/lifepillar/vim-gruvbox8) and other beautiful themes.
++ Beautiful colorscheme via [sainnhe/gruvbox-material](https://github.com/sainnhe/gruvbox-material) and other colorschemes.
 + Markdown writing and previewing via [vim-markdown](https://github.com/plasticboy/vim-markdown) and [markdown-preview.nvim](https://github.com/iamcco/markdown-preview.nvim).
 + LaTeX editing and previewing via [vimtex](https://github.com/lervag/vimtex) <sup id="a1">[1](#f1)</sup>.
 + Animated GUI style notification via [nvim-notify](https://github.com/rcarriga/nvim-notify).

after/ftplugin/lua.vim

@@ -8,3 +8,6 @@ set shiftwidth=2    " number of spaces to use for autoindent
 set expandtab       " expand tab to spaces so that tabs are spaces
 
 nnoremap <silent> <F9> :luafile %<CR>
+
+" For delimitMate
+let b:delimitMate_matchpairs = "(:),[:],{:}"

autoload/buf_utils.vim

@@ -15,7 +15,7 @@ function! buf_utils#GoToBuffer(count, direction) abort
     " we are essentially mixing Lua and vim script. We need to make sure that
     " args inside vim.notify() are valid vim values. The conversion from vim
     " value to lua value will be done by Nvim. See also https://github.com/neovim/neovim/pull/11338.
-    call v:lua.vim.notify('Invalid bufnr: ' . a:count, 'error', {'title': 'nvim-config'})
+    call v:lua.vim.notify('Invalid bufnr: ' . a:count, 4, {'title': 'nvim-config'})
     return
   endif
 

autoload/utils.vim

@@ -27,21 +27,6 @@ function! utils#HasColorscheme(name) abort
   return !empty(globpath(&runtimepath, l:pat))
 endfunction
 
-" Generate random integers in the range [Low, High] in pure vim script,
-" adapted from https://stackoverflow.com/a/12739441/6064933
-function! utils#RandInt(Low, High) abort
-  " Use lua to generate random int. It is faster. Ref: https://stackoverflow.com/a/20157671/6064933
-  call v:lua.math.randomseed(localtime())
-  return v:lua.math.random(a:Low, a:High)
-endfunction
-
-" Selection a random element from a sequence/list
-function! utils#RandElement(seq) abort
-  let l:idx = utils#RandInt(0, len(a:seq)-1)
-
-  return a:seq[l:idx]
-endfunction
-
 " Custom fold expr, adapted from https://vi.stackexchange.com/a/9094/15292
 function! utils#VimFolds(lnum) abort
   " get content of current line and the line below
@@ -156,7 +141,7 @@ function! utils#Inside_git_repo() abort
   if match(res, 'true') == -1
     return v:false
   else
-    " Manually trigger a specical user autocmd InGitRepo (to use it for
+    " Manually trigger a special user autocmd InGitRepo (to use it for
     " lazyloading of fugitive by packer.nvim).
     " See also https://github.com/wbthomason/packer.nvim/discussions/534.
     doautocmd User InGitRepo
@@ -198,14 +183,3 @@ function! utils#MultiEdit(patterns) abort
     endfor
   endfor
 endfunction
-
-function! utils#add_pack(name) abort
-  let l:status = v:true
-  try
-    execute printf("packadd! %s", a:name)
-  catch /^Vim\%((\a\+)\)\=:E919/
-    let l:status = v:false
-  endtry
-
-  return l:status
-endfunction

core/autocommands.vim

@@ -41,26 +41,6 @@ function s:resume_cursor_position() abort
   endif
 endfunction
 
-" Display a message when the current file is not in utf-8 format.
-" Note that we need to use `unsilent` command here because of this issue:
-" https://github.com/vim/vim/issues/4379
-augroup non_utf8_file_warn
-  autocmd!
-  " we can not use `lua vim.notify()`: it will error out E5107 parsing lua.
-  autocmd BufRead * if &fileencoding != 'utf-8' | call v:lua.vim.notify('File not in UTF-8 format!', 'warn', {'title': 'nvim-config'}) | endif
-augroup END
-
-" Automatically reload the file if it is changed outside of Nvim, see
-" https://unix.stackexchange.com/a/383044/221410. It seems that `checktime`
-" command does not work in command line. We need to check if we are in command
-" line before executing this command. See also
-" https://vi.stackexchange.com/a/20397/15292.
-augroup auto_read
-  autocmd!
-  autocmd FileChangedShellPost * call v:lua.vim.notify("File changed on disk. Buffer reloaded!", 'warn', {'title': 'nvim-config'})
-  autocmd FocusGained,CursorHold * if getcmdwintype() == '' | checktime | endif
-augroup END
-
 augroup numbertoggle
   autocmd!
   autocmd BufEnter,FocusGained,InsertLeave,WinEnter * if &nu | set rnu   | endif
@@ -88,12 +68,6 @@ function! s:custom_highlight() abort
   highlight MatchParen cterm=bold,underline gui=bold,underline
 endfunction
 
-" highlight yanked region, see `:h lua-highlight`
-augroup highlight_yank
-  autocmd!
-  au TextYankPost * silent! lua vim.highlight.on_yank{higroup="YankColor", timeout=300, on_visual=false}
-augroup END
-
 augroup auto_close_win
   autocmd!
   autocmd BufEnter * call s:quit_current_win()
@@ -125,13 +99,25 @@ augroup git_repo_check
   autocmd VimEnter,DirChanged * call utils#Inside_git_repo()
 augroup END
 
-" Auto-generate packer_compiled.lua file
-augroup packer_auto_compile
+" ref: https://vi.stackexchange.com/a/169/15292
+function! s:handle_large_file() abort
+  let g:large_file = 10485760 " 10MB
+  let f = expand("<afile>")
+
+  if getfsize(f) > g:large_file || getfsize(f) == -2
+    set eventignore+=all
+    " turning off relative number helps a lot
+    set norelativenumber
+    setlocal noswapfile bufhidden=unload buftype=nowrite undolevels=-1
+  else
+    set eventignore-=all relativenumber
+  endif
+endfunction
+
+augroup LargeFile
   autocmd!
-  autocmd BufWritePost */nvim/lua/plugins.lua source <afile> | PackerCompile
+  autocmd BufReadPre * call s:handle_large_file()
 augroup END
 
-augroup auto_create_dir
-  autocmd!
-  autocmd BufWritePre * lua require('utils').may_create_dir()
-augroup END
+" Load auto-command defined in Lua
+lua require("custom-autocmd")

core/colorschemes.lua

@@ -0,0 +1,123 @@
+--- This module will load a random colorscheme on nvim startup process.
+
+local utils = require("utils")
+
+local M = {}
+
+-- Colorscheme to its directory name mapping, because colorscheme repo name is not necessarily
+-- the same as the colorscheme name itself.
+M.colorscheme2dir = {
+  gruvbox8 = "vim-gruvbox8",
+  onedark = "onedark.nvim",
+  edge = "edge",
+  sonokai = "sonokai",
+  gruvbox_material = "gruvbox-material",
+  nord = "nord.nvim",
+  doom_one = "doom-one.nvim",
+  everforest = "everforest",
+  nightfox = "nightfox.nvim",
+  kanagawa = "kanagawa.nvim",
+  catppuccin = "catppuccin",
+}
+
+M.gruvbox8 = function()
+  -- Italic options should be put before colorscheme setting,
+  -- see https://github.com/morhetz/gruvbox/wiki/Terminal-specific#1-italics-is-disabled
+  vim.g.gruvbox_italics = 1
+  vim.g.gruvbox_italicize_strings = 1
+  vim.g.gruvbox_filetype_hi_groups = 1
+  vim.g.gruvbox_plugin_hi_groups = 1
+
+  vim.cmd([[colorscheme gruvbox8_hard]])
+end
+
+M.onedark = function()
+  vim.cmd([[colorscheme onedark]])
+end
+
+M.edge = function()
+  vim.g.edge_enable_italic = 1
+  vim.g.edge_better_performance = 1
+
+  vim.cmd([[colorscheme edge]])
+end
+
+M.sonokai = function()
+  vim.g.sonokai_enable_italic = 1
+  vim.g.sonokai_better_performance = 1
+
+  vim.cmd([[colorscheme sonokai]])
+end
+
+M.gruvbox_material = function()
+  vim.g.gruvbox_material_enable_italic = 1
+  vim.g.gruvbox_material_better_performance = 1
+
+  vim.cmd([[colorscheme gruvbox-material]])
+end
+
+M.nord = function()
+  vim.cmd([[colorscheme nord]])
+end
+
+M.doom_one = function()
+  vim.cmd([[colorscheme doom-one]])
+end
+
+M.everforest = function()
+  vim.g.everforest_enable_italic = 1
+  vim.g.everforest_better_performance = 1
+
+  vim.cmd([[colorscheme everforest]])
+end
+
+M.nightfox = function()
+  vim.cmd([[colorscheme nordfox]])
+end
+
+M.kanagawa = function()
+  vim.cmd([[colorscheme kanagawa]])
+end
+
+M.catppuccin = function()
+  -- available option: latte, frappe, macchiato, mocha
+  vim.g.catppuccin_flavour = "frappe"
+
+  require("catppuccin").setup()
+
+  vim.cmd([[colorscheme catppuccin]])
+end
+
+--- Use a random colorscheme from the pre-defined list of colorschemes.
+M.rand_colorscheme = function()
+  local colorscheme = utils.rand_element(vim.tbl_keys(M.colorscheme2dir))
+
+  if not vim.tbl_contains(vim.tbl_keys(M), colorscheme) then
+    local msg = "Invalid colorscheme: " .. colorscheme
+    vim.notify(msg, vim.log.levels.ERROR, { title = "nvim-config" })
+
+    return
+  end
+
+  -- Load the colorscheme, because all the colorschemes are declared as opt plugins, so the colorscheme isn't loaded yet.
+  local status = utils.add_pack(M.colorscheme2dir[colorscheme])
+
+  if not status then
+    local msg = string.format("Colorscheme %s is not installed. Run PackerSync to install.", colorscheme)
+    vim.notify(msg, vim.log.levels.ERROR, { title = "nvim-config" })
+
+    return
+  end
+
+  -- Load the colorscheme and its settings
+  M[colorscheme]()
+
+  if vim.g.logging_level == "debug" then
+    local msg = "Colorscheme: " .. colorscheme
+
+    vim.notify(msg, vim.log.levels.DEBUG, { title = "nvim-config" })
+  end
+end
+
+-- Load a random colorscheme
+M.rand_colorscheme()

core/globals.lua

@@ -0,0 +1,81 @@
+local fn = vim.fn
+local api = vim.api
+
+local utils = require('utils')
+
+-- Inspect something
+function _G.inspect(item)
+  vim.pretty_print(item)
+end
+
+------------------------------------------------------------------------
+--                          custom variables                          --
+------------------------------------------------------------------------
+vim.g.is_win = (utils.has("win32") or utils.has("win64")) and true or false
+vim.g.is_linux = (utils.has("unix") and (not utils.has("macunix"))) and true or false
+vim.g.is_mac  = utils.has("macunix") and true or false
+
+vim.g.logging_level = "info"
+
+------------------------------------------------------------------------
+--                         builtin variables                          --
+------------------------------------------------------------------------
+vim.g.loaded_perl_provider = 0  -- Disable perl provider
+vim.g.loaded_ruby_provider = 0  -- Disable ruby provider
+vim.g.loaded_node_provider = 0  -- Disable node provider
+vim.g.did_install_default_menus = 1  -- do not load menu
+
+if utils.executable('python3') then
+  if vim.g.is_win then
+    vim.g.python3_host_prog = fn.substitute(fn.exepath("python3"), ".exe$", '', 'g')
+  else
+    vim.g.python3_host_prog = fn.exepath("python3")
+  end
+else
+  api.nvim_err_writeln("Python3 executable not found! You must install Python3 and set its PATH correctly!")
+  return
+end
+
+-- Custom mapping <leader> (see `:h mapleader` for more info)
+vim.g.mapleader = ','
+
+-- Enable highlighting for lua HERE doc inside vim script
+vim.g.vimsyn_embed = 'l'
+
+-- Use English as main language
+if not vim.g.is_mac then
+  vim.cmd [[language en_US.utf-8]]
+end
+
+-- use filetype.lua instead of filetype.vim
+vim.g.do_filetype_lua = 1
+vim.g.did_load_filetypes = 0
+
+-- Disable loading certain plugins
+
+-- Whether to load netrw by default, see https://github.com/bling/dotvim/issues/4
+vim.g.loaded_netrw       = 1
+vim.g.loaded_netrwPlugin = 1
+vim.g.netrw_liststyle = 3
+if vim.g.is_win then
+  vim.g.netrw_http_cmd = "curl --ssl-no-revoke -Lo"
+end
+
+-- Do not load tohtml.vim
+vim.g.loaded_2html_plugin = 1
+
+-- Do not load zipPlugin.vim, gzip.vim and tarPlugin.vim (all these plugins are
+-- related to checking files inside compressed files)
+vim.g.loaded_zipPlugin = 1
+vim.g.loaded_gzip = 1
+vim.g.loaded_tarPlugin = 1
+
+-- Do not load the tutor plugin
+vim.g.loaded_tutor_mode_plugin = 1
+
+-- Do not use builtin matchit.vim and matchparen.vim since we use vim-matchup
+vim.g.loaded_matchit = 1
+vim.g.loaded_matchparen = 1
+
+-- Disable sql omni completion, it is broken.
+vim.g.loaded_sql_completion = 1

core/globals.vim

@@ -1,77 +0,0 @@
-"{ Global Variable
-"{{ Custom variables
-let g:is_win = (has('win32') || has('win64')) ? v:true : v:false
-let g:is_linux = (has('unix') && !has('macunix')) ? v:true : v:false
-let g:is_mac = has('macunix') ? v:true : v:false
-let g:logging_level = 'info'
-"}}
-
-"{{ Builtin variables
-" Disable perl provider
-let g:loaded_perl_provider = 0
-
-" Disable ruby provider
-let g:loaded_ruby_provider = 0
-
-" Disable node provider
-let g:loaded_node_provider = 0
-
-let g:did_install_default_menus = 1  " do not load menu
-
-" Path to Python 3 interpreter (must be an absolute path), make startup
-" faster. See https://neovim.io/doc/user/provider.html.
-if executable('python')
-   if g:is_win
-    let g:python3_host_prog=substitute(exepath('python'), '.exe$', '', 'g')
-  elseif g:is_linux || g:is_mac
-    let g:python3_host_prog=exepath('python')
-  endif
-else
-  echoerr 'Python 3 executable not found! You must install Python 3 and set its PATH correctly!'
-endif
-
-" Custom mapping <leader> (see `:h mapleader` for more info)
-let g:mapleader = ','
-
-" Enable highlighting for lua HERE doc inside vim script
-let g:vimsyn_embed = 'l'
-
-" Use English as main language
-if !g:is_mac
-  language en_US.utf-8
-endif
-
-" use filetype.lua instead of filetype.vim
-let g:do_filetype_lua = 1
-let g:did_load_filetypes = 0
-"}}
-
-"{{ Disable loading certain plugins
-" Whether to load netrw by default, see
-" https://github.com/bling/dotvim/issues/4
-let g:loaded_netrw       = 1
-let g:loaded_netrwPlugin = 1
-let g:netrw_liststyle = 3
-if g:is_win
-  let g:netrw_http_cmd = 'curl --ssl-no-revoke -Lo'
-endif
-
-" Do not load tohtml.vim
-let g:loaded_2html_plugin = 1
-
-" Do not load zipPlugin.vim, gzip.vim and tarPlugin.vim (all these plugins are
-" related to checking files inside compressed files)
-let g:loaded_zipPlugin = 1
-let loaded_gzip = 1
-let g:loaded_tarPlugin = 1
-
-let g:loaded_tutor_mode_plugin = 1  " do not load the tutor plugin
-
-" Do not use builtin matchit.vim and matchparen.vim since we use vim-matchup
-let g:loaded_matchit = 1
-let g:loaded_matchparen = 1
-"}}
-
-" Disable sql omni completion, it is broken.
-let g:loaded_sql_completion = 1
-"}

core/mappings.lua

@@ -0,0 +1,228 @@
+local keymap = vim.keymap
+local api = vim.api
+
+-- Save key strokes (now we do not need to press shift to enter command mode).
+keymap.set({ "n", "x" }, ";", ":")
+
+-- Turn the word under cursor to upper case
+keymap.set("i", "<c-u>", "<Esc>viwUea")
+
+-- Turn the current word into title case
+keymap.set("i", "<c-t>", "<Esc>b~lea")
+
+-- Paste non-linewise text above or below current line, see https://stackoverflow.com/a/1346777/6064933
+keymap.set("n", "<leader>p", "m`o<ESC>p``", { desc = "paste below current line" })
+keymap.set("n", "<leader>P", "m`O<ESC>p``", { desc = "paste above current line" })
+
+-- Shortcut for faster save and quit
+keymap.set("n", "<leader>w", "<cmd>update<cr>", { silent = true, desc = "save buffer" })
+
+-- Saves the file if modified and quit
+keymap.set("n", "<leader>q", "<cmd>x<cr>", { silent = true, desc = "quit current window" })
+
+-- Quit all opened buffers
+keymap.set("n", "<leader>Q", "<cmd>qa!<cr>", { silent = true, desc = "quit nvim" })
+
+-- Navigation in the location and quickfix list
+keymap.set("n", "[l", "<cmd>lprevious<cr>zv", { silent = true, desc = "previous location item" })
+keymap.set("n", "]l", "<cmd>lnext<cr>zv", { silent = true, desc = "next location item" })
+
+keymap.set("n", "[L", "<cmd>lfirst<cr>zv", { silent = true, desc = "first location item" })
+keymap.set("n", "]L", "<cmd>llast<cr>zv", { silent = true, desc = "last location item" })
+
+keymap.set("n", "[q", "<cmd>cprevious<cr>zv", { silent = true, desc = "previous qf item" })
+keymap.set("n", "]q", "<cmd>cnext<cr>zv", { silent = true, desc = "next qf item" })
+
+keymap.set("n", "[Q", "<cmd>cfirst<cr>zv", { silent = true, desc = "first qf item" })
+keymap.set("n", "]Q", "<cmd>clast<cr>zv", { silent = true, desc = "last qf item" })
+
+-- Close location list or quickfix list if they are present, see https://superuser.com/q/355325/736190
+keymap.set("n", [[\x]], "<cmd>windo lclose <bar> cclose <cr>", {
+  silent = true,
+  desc = "close qf and location list",
+})
+
+-- Delete a buffer, without closing the window, see https://stackoverflow.com/q/4465095/6064933
+keymap.set("n", [[\d]], "<cmd>bprevious <bar> bdelete #<cr>", {
+  silent = true,
+  desc = "delete buffer",
+})
+
+-- Insert a blank line below or above current line (do not move the cursor),
+-- see https://stackoverflow.com/a/16136133/6064933
+keymap.set("n", "<space>o", "printf('m`%so<ESC>``', v:count1)", {
+  expr = true,
+  desc = "insert line below",
+})
+
+keymap.set("n", "<space>O", "printf('m`%sO<ESC>``', v:count1)", {
+  expr = true,
+  desc = "insert line above",
+})
+
+-- Move the cursor based on physical lines, not the actual lines.
+keymap.set("n", "j", "v:count == 0 ? 'gj' : 'j'", { expr = true })
+keymap.set("n", "k", "v:count == 0 ? 'gk' : 'k'", { expr = true })
+keymap.set("n", "^", "g^")
+keymap.set("n", "0", "g0")
+
+-- Do not include white space characters when using $ in visual mode,
+-- see https://vi.stackexchange.com/q/12607/15292
+keymap.set("x", "$", "g_")
+
+-- Go to start or end of line easier
+keymap.set({ "n", "x" }, "H", "^")
+keymap.set({ "n", "x" }, "L", "g_")
+
+-- Continuous visual shifting (does not exit Visual mode), `gv` means
+-- to reselect previous visual area, see https://superuser.com/q/310417/736190
+keymap.set("x", "<", "<gv")
+keymap.set("x", ">", ">gv")
+
+-- Edit and reload nvim config file quickly
+keymap.set("n", "<leader>ev", "<cmd>tabnew $MYVIMRC <bar> tcd %:h<cr>", {
+  silent = true,
+  desc = "open init.lua",
+})
+
+keymap.set("n", "<leader>sv", "", {
+  silent = true,
+  desc = "reload init.lua",
+  callback = function()
+    vim.cmd([[
+      update $MYVIMRC
+      source $MYVIMRC
+    ]])
+    vim.notify("Nvim config successfully reloaded!", vim.log.levels.INFO, { title = "nvim-config" })
+  end,
+})
+
+-- Reselect the text that has just been pasted, see also https://stackoverflow.com/a/4317090/6064933.
+keymap.set("n", "<leader>v", "printf('`[%s`]', getregtype()[0])", {
+  expr = true,
+  desc = "reselect last pasted area",
+})
+
+-- Always use very magic mode for searching
+keymap.set("n", "/", [[/\v]])
+
+-- Search in selected region
+-- xnoremap / :<C-U>call feedkeys('/\%>'.(line("'<")-1).'l\%<'.(line("'>")+1)."l")<CR>
+
+-- Change current working directory locally and print cwd after that,
+-- see https://vim.fandom.com/wiki/Set_working_directory_to_the_current_file
+keymap.set("n", "<leader>cd", "<cmd>lcd %:p:h<cr><cmd>pwd<cr>", { desc = "change cwd" })
+
+-- Use Esc to quit builtin terminal
+keymap.set("t", "<Esc>", [[<c-\><c-n>]])
+
+-- Toggle spell checking
+keymap.set("n", "<F11>", "<cmd>set spell!<cr>", { desc = "toggle spell" })
+keymap.set("i", "<F11>", "<c-o><cmd>set spell!<cr>", { desc = "toggle spell" })
+
+-- Change text without putting it into the vim register,
+-- see https://stackoverflow.com/q/54255/6064933
+keymap.set("n", "c", '"_c')
+keymap.set("n", "C", '"_C')
+keymap.set("n", "cc", '"_cc')
+keymap.set("x", "c", '"_c')
+
+-- Remove trailing whitespace characters
+keymap.set("n", "<leader><space>", "<cmd>StripTrailingWhitespace<cr>", { desc = "remove trailing space" })
+
+-- check the syntax group of current cursor position
+keymap.set("n", "<leader>st", "<cmd>call utils#SynGroup()<cr>", { desc = "check syntax group" })
+
+-- Copy entire buffer.
+keymap.set("n", "<leader>y", "<cmd>%yank<cr>", { desc = "yank entire buffer" })
+
+-- Toggle cursor column
+keymap.set("n", "<leader>cl", "<cmd>call utils#ToggleCursorCol()<cr>", { desc = "toggle cursor column" })
+
+-- Move current line up and down
+keymap.set("n", "<A-k>", '<cmd>call utils#SwitchLine(line("."), "up")<cr>', { desc = "move line up" })
+keymap.set("n", "<A-j>", '<cmd>call utils#SwitchLine(line("."), "down")<cr>', { desc = "move line down" })
+
+-- Move current visual-line selection up and down
+keymap.set("x", "<A-k>", '<cmd>call utils#MoveSelection("up")<cr>', { desc = "move selection up" })
+
+keymap.set("x", "<A-j>", '<cmd>call utils#MoveSelection("down")<cr>', { desc = "move selection down" })
+
+-- Replace visual selection with text in register, but not contaminate the register,
+-- see also https://stackoverflow.com/q/10723700/6064933.
+keymap.set("x", "p", '"_c<Esc>p')
+
+-- Go to a certain buffer
+keymap.set("n", "gb", '<cmd>call buf_utils#GoToBuffer(v:count, "forward")<cr>', {
+  desc = "go to buffer (forward)",
+})
+keymap.set("n", "gB", '<cmd>call buf_utils#GoToBuffer(v:count, "backward")<cr>', {
+  desc = "go to buffer (backward)",
+})
+
+-- Switch windows
+keymap.set("n", "<left>", "<c-w>h")
+keymap.set("n", "<Right>", "<C-W>l")
+keymap.set("n", "<Up>", "<C-W>k")
+keymap.set("n", "<Down>", "<C-W>j")
+
+-- Text objects for URL
+keymap.set({ "x", "o" }, "iu", "<cmd>call text_obj#URL()<cr>", { desc = "URL text object" })
+
+-- Text objects for entire buffer
+keymap.set({ "x", "o" }, "iB", "<cmd>call text_obj#Buffer()<cr>", { desc = "buffer text object" })
+
+-- Do not move my cursor when joining lines.
+keymap.set("n", "J", "", {
+  desc = "join line",
+  callback = function()
+    vim.cmd([[
+      normal! mzJ`z
+      delmarks z
+    ]])
+  end,
+})
+
+keymap.set("n", "gJ", "mzgJ`z", {
+  desc = "join visual lines",
+  callback = function()
+    -- we must use `normal!`, otherwise it will trigger recursive mapping
+    vim.cmd([[
+      normal! zmgJ`z
+      delmarks z
+    ]])
+  end,
+})
+
+-- Break inserted text into smaller undo units when we insert some punctuation chars.
+local undo_ch = { ",", ".", "!", "?", ";", ":" }
+for _, ch in ipairs(undo_ch) do
+  keymap.set("i", ch, ch .. "<c-g>u")
+end
+
+-- insert semicolon in the end
+keymap.set("i", "<A-;>", "<Esc>miA;<Esc>`ii")
+
+-- Keep cursor position after yanking
+keymap.set("n", "y", "myy")
+
+api.nvim_create_autocmd("TextYankPost", {
+  pattern = "*",
+  group = api.nvim_create_augroup("restore_after_yank", { clear = true }),
+  callback = function()
+    vim.cmd([[
+      silent! normal! `y
+      silent! delmarks y
+    ]])
+  end,
+})
+
+-- Go to the beginning and end of current line in insert mode quickly
+keymap.set("i", "<C-A>", "<HOME>")
+keymap.set("i", "<C-E>", "<END>")
+
+-- Go to beginning of command in command-line mode
+keymap.set("c", "<C-A>", "<HOME>")
+
+-- Delete the character to the right of the cursor
+keymap.set("i", "<C-D>", "<DEL>")

core/mappings.vim

@@ -1,195 +0,0 @@
-" Save key strokes (now we do not need to press shift to enter command mode).
-" Vim-sneak has also mapped `;`, so using the below mapping will break the map
-" used by vim-sneak
-nnoremap ; :
-xnoremap ; :
-
-" Quicker way to open command window
-nnoremap q; q:
-
-" Turn the word under cursor to upper case
-inoremap <c-u> <Esc>viwUea
-
-" Turn the current word into title case
-inoremap <c-t> <Esc>b~lea
-
-" Paste non-linewise text above or below current cursor,
-" see https://stackoverflow.com/a/1346777/6064933
-nnoremap <leader>p m`o<ESC>p``
-nnoremap <leader>P m`O<ESC>p``
-
-" Shortcut for faster save and quit
-nnoremap <silent> <leader>w :<C-U>update<CR>
-" Saves the file if modified and quit
-nnoremap <silent> <leader>q :<C-U>x<CR>
-" Quit all opened buffers
-nnoremap <silent> <leader>Q :<C-U>qa!<CR>
-
-" Navigation in the location and quickfix list
-nnoremap <silent> [l :<C-U>lprevious<CR>zv
-nnoremap <silent> ]l :<C-U>lnext<CR>zv
-nnoremap <silent> [L :<C-U>lfirst<CR>zv
-nnoremap <silent> ]L :<C-U>llast<CR>zv
-nnoremap <silent> [q :<C-U>cprevious<CR>zv
-nnoremap <silent> ]q :<C-U>cnext<CR>zv
-nnoremap <silent> [Q :<C-U>cfirst<CR>zv
-nnoremap <silent> ]Q :<C-U>clast<CR>zv
-
-" Close location list or quickfix list if they are present,
-" see https://superuser.com/q/355325/736190
-nnoremap<silent> \x :<C-U>windo lclose <bar> cclose<CR>
-
-" Close a buffer and switching to another buffer, do not close the
-" window, see https://stackoverflow.com/q/4465095/6064933
-nnoremap <silent> \d :<C-U>bprevious <bar> bdelete #<CR>
-
-" Insert a blank line below or above current line (do not move the cursor),
-" see https://stackoverflow.com/a/16136133/6064933
-nnoremap <expr> <Space>o printf('m`%so<ESC>``', v:count1)
-nnoremap <expr> <Space>O printf('m`%sO<ESC>``', v:count1)
-
-" Insert a space after current character
-nnoremap <Space><Space> a<Space><ESC>h
-
-" Move the cursor based on physical lines, not the actual lines.
-nnoremap <expr> j (v:count == 0 ? 'gj' : 'j')
-nnoremap <expr> k (v:count == 0 ? 'gk' : 'k')
-nnoremap ^ g^
-nnoremap 0 g0
-
-" Do not include white space characters when using $ in visual mode,
-" see https://vi.stackexchange.com/q/12607/15292
-xnoremap $ g_
-
-" Jump to matching pairs easily in normal mode
-nnoremap <Tab> %
-
-" Go to start or end of line easier
-nnoremap H ^
-xnoremap H ^
-nnoremap L g_
-xnoremap L g_
-
-" Continuous visual shifting (does not exit Visual mode), `gv` means
-" to reselect previous visual area, see https://superuser.com/q/310417/736190
-xnoremap < <gv
-xnoremap > >gv
-
-" When completion menu is shown, use <cr> to select an item and do not add an
-" annoying newline. Otherwise, <enter> is what it is. For more info , see
-" https://superuser.com/a/941082/736190 and
-" https://unix.stackexchange.com/q/162528/221410
-" inoremap <expr> <cr> ((pumvisible())?("\<C-Y>"):("\<cr>"))
-" Use <esc> to close auto-completion menu
-" inoremap <expr> <esc> ((pumvisible())?("\<C-e>"):("\<esc>"))
-
-" Tab-complete, see https://vi.stackexchange.com/q/19675/15292.
-inoremap <expr> <tab> pumvisible() ? "\<c-n>" : "\<tab>"
-inoremap <expr> <s-tab> pumvisible() ? "\<c-p>" : "\<s-tab>"
-
-" Edit and reload init.vim 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>
-
-" Reselect the text that has just been pasted, see also https://stackoverflow.com/a/4317090/6064933.
-nnoremap <expr> <leader>v printf('`[%s`]', getregtype()[0])
-
-" Always use very magic mode for searching
-nnoremap / /\v
-
-" Search in selected region
-xnoremap / :<C-U>call feedkeys('/\%>'.(line("'<")-1).'l\%<'.(line("'>")+1)."l")<CR>
-
-" Change current working directory locally and print cwd after that,
-" see https://vim.fandom.com/wiki/Set_working_directory_to_the_current_file
-nnoremap <silent> <leader>cd :<C-U>lcd %:p:h<CR>:pwd<CR>
-
-" Use Esc to quit builtin terminal
-tnoremap <ESC>   <C-\><C-n>
-
-" Toggle spell checking (autosave does not play well with z=, so we disable it
-" when we are doing spell checking)
-nnoremap <silent> <F11> :<C-U>set spell!<cr>
-inoremap <silent> <F11> <C-O>:<C-U>set spell!<cr>
-
-" Change text without putting it into the vim register,
-" see https://stackoverflow.com/q/54255/6064933
-nnoremap c "_c
-nnoremap C "_C
-nnoremap cc "_cc
-xnoremap c "_c
-
-" Remove trailing whitespace characters
-nnoremap <silent> <leader><Space> :<C-U>StripTrailingWhitespace<CR>
-
-" check the syntax group of current cursor position
-nnoremap <silent> <leader>st :<C-U>call utils#SynGroup()<CR>
-
-" Clear highlighting
-if maparg('<C-L>', 'n') ==# ''
-  nnoremap <silent> <C-L> :<C-U>nohlsearch<C-R>=has('diff')?'<Bar>diffupdate':''<CR><CR><C-L>
-endif
-
-" Copy entire buffer.
-nnoremap <silent> <leader>y :<C-U>%y<CR>
-
-" Toggle cursor column
-nnoremap <silent> <leader>cl :<C-U>call utils#ToggleCursorCol()<CR>
-
-" Move current line up and down
-nnoremap <silent> <A-k> <Cmd>call utils#SwitchLine(line('.'), 'up')<CR>
-nnoremap <silent> <A-j> <Cmd>call utils#SwitchLine(line('.'), 'down')<CR>
-
-" Move current visual-line selection up and down
-xnoremap <silent> <A-k> :<C-U>call utils#MoveSelection('up')<CR>
-xnoremap <silent> <A-j> :<C-U>call utils#MoveSelection('down')<CR>
-
-" Replace visual selection with text in register, but not contaminate the
-" register, see also https://stackoverflow.com/q/10723700/6064933.
-xnoremap p "_c<ESC>p
-
-nnoremap <silent> gb :<C-U>call buf_utils#GoToBuffer(v:count, 'forward')<CR>
-nnoremap <silent> gB :<C-U>call buf_utils#GoToBuffer(v:count, 'backward')<CR>
-
-nnoremap <Left> <C-W>h
-nnoremap <Right> <C-W>l
-nnoremap <Up> <C-W>k
-nnoremap <Down> <C-W>j
-
-" Text objects for URL
-xnoremap <silent> iu :<C-U>call text_obj#URL()<CR>
-onoremap <silent> iu :<C-U>call text_obj#URL()<CR>
-
-" Text objects for entire buffer
-xnoremap <silent> iB :<C-U>call text_obj#Buffer()<CR>
-onoremap <silent> iB :<C-U>call text_obj#Buffer()<CR>
-
-" Do not move my cursor when joining lines.
-nnoremap J mzJ`z
-nnoremap gJ mzgJ`z
-
-" Break inserted text into smaller undo units.
-for ch in [',', '.', '!', '?', ';', ':']
-  execute printf('inoremap %s %s<C-g>u', ch, ch)
-endfor
-
-" insert semicolon in the end
-inoremap <A-;> <ESC>miA;<ESC>`ii
-
-" Keep cursor position after yanking
-nnoremap y myy
-xnoremap y myy
-
-augroup restore_after_yank
-  autocmd!
-  autocmd TextYankPost *  call s:restore_cursor()
-augroup END
-
-function! s:restore_cursor() abort
-  silent! normal `y
-  silent! delmarks y
-endfunction
-
-" for mappings defined in lua
-lua require('custom-map')

core/options.vim

@@ -177,3 +177,4 @@ set diffopt+=context:3  " context for diff
 set diffopt+=internal,indent-heuristic,algorithm:histogram
 
 set nowrap  " do no wrap
+set noruler

core/plugins.vim

@@ -1,7 +1,7 @@
 scriptencoding utf-8
 
 " Plugin specification and lua stuff
-lua require('lua-init')
+lua require('plugins')
 
 " Use short names for common plugin manager commands to simplify typing.
 " To use these shortcuts: first activate command line with `:`, then input the
@@ -189,15 +189,6 @@ let g:signify_vcs_list = [ 'git' ]
 " Change the sign for certain operations
 let g:signify_sign_change = '~'
 
-"""""""""""""""""""""""""vim-fugitive settings""""""""""""""""""""""""""""""
-nnoremap <silent> <leader>gs :Git<CR>
-nnoremap <silent> <leader>gw :Gwrite<CR>
-nnoremap <silent> <leader>gc :Git commit<CR>
-nnoremap <silent> <leader>gd :Gdiffsplit<CR>
-nnoremap <silent> <leader>gpl :Git pull<CR>
-" Note that to use bar literally, we need backslash it, see also `:h :bar`.
-nnoremap <silent> <leader>gpu :15split \| term git push<CR>
-
 """""""""""""""""""""""""plasticboy/vim-markdown settings"""""""""""""""""""
 " Disable header folding
 let g:vim_markdown_folding_disabled = 1
@@ -260,7 +251,7 @@ omap s <Nop>
 
 """"""""""""""""""""""""""""vimtex settings"""""""""""""""""""""""""""""
 if ( g:is_win || g:is_mac ) && executable('latex')
-  " Hacks for inverse serach to work semi-automatically,
+  " Hacks for inverse search to work semi-automatically,
   " see https://jdhao.github.io/2021/02/20/inverse_search_setup_neovim_vimtex/.
   function! s:write_server_name() abort
     let nvim_server_file = (has('win32') ? $TEMP : '/tmp') . '/vimtexserver.txt'
@@ -371,9 +362,16 @@ if exists('g:started_by_firenvim') && g:started_by_firenvim
       \ }
   \ }
 
+  function! s:setup_firenvim() abort
+    set noruler noshowcmd
+    set laststatus=0 showtabline=0
+  endfunction
+
   augroup firenvim
     autocmd!
-    autocmd BufEnter *.txt setlocal filetype=markdown laststatus=0 nonumber noshowcmd noruler showtabline=1
+    autocmd FileType text call s:setup_firenvim()
+    autocmd BufNewFile github.com_*.txt set filetype=markdown
+    autocmd BufNewFile stackoverflow.com_*.txt set filetype=markdown
   augroup END
 endif
 

core/themes.vim

@@ -1,99 +0,0 @@
-let s:theme_setup_dict = {}
-
-function! s:theme_setup_dict.gruvbox8() dict abort
-  " Italic options should be put before colorscheme setting,
-  " see https://github.com/morhetz/gruvbox/wiki/Terminal-specific#1-italics-is-disabled
-  let g:gruvbox_italics=1
-  let g:gruvbox_italicize_strings=1
-  let g:gruvbox_filetype_hi_groups = 1
-  let g:gruvbox_plugin_hi_groups = 1
-  colorscheme gruvbox8_hard
-endfunction
-
-function! s:theme_setup_dict.onedark() dict abort
-  colorscheme onedark
-endfunction
-
-function! s:theme_setup_dict.edge() dict abort
-  let g:edge_enable_italic = 1
-  let g:edge_better_performance = 1
-  colorscheme edge
-endfunction
-
-function! s:theme_setup_dict.sonokai() dict abort
-  let g:sonokai_enable_italic = 1
-  let g:sonokai_better_performance = 1
-  colorscheme sonokai
-endfunction
-
-function! s:theme_setup_dict.gruvbox_material() dict abort
-  let g:gruvbox_material_enable_italic = 1
-  let g:gruvbox_material_better_performance = 1
-  colorscheme gruvbox-material
-endfunction
-
-function! s:theme_setup_dict.nord() dict abort
-  colorscheme nord
-endfunction
-
-function! s:theme_setup_dict.doom_one() dict abort
-  colorscheme doom-one
-endfunction
-
-function! s:theme_setup_dict.everforest() dict abort
-  let g:everforest_enable_italic = 1
-  let g:everforest_better_performance = 1
-  colorscheme everforest
-endfunction
-
-function! s:theme_setup_dict.nightfox() dict abort
-  colorscheme nordfox
-endfunction
-
-function! s:theme_setup_dict.kanagawa() dict abort
-  colorscheme kanagawa
-endfunction
-
-function! s:theme_setup_dict.catppuccin() dict abort
-  let g:catppuccin_flavour = "frappe" " latte, frappe, macchiato, mocha
-
-  lua require("catppuccin").setup()
-  colorscheme catppuccin
-endfunction
-
-" Theme to directory name mapping, because theme repo name is not necessarily
-" the same as the theme name itself.
-let s:theme2dir = {
-      \ 'gruvbox8' : 'vim-gruvbox8',
-      \ 'onedark': 'onedark.nvim',
-      \ 'edge' : 'edge',
-      \ 'sonokai': 'sonokai',
-      \ 'gruvbox_material': 'gruvbox-material',
-      \ 'nord': 'nord.nvim',
-      \ 'doom_one': 'doom-one.nvim',
-      \ 'everforest' :'everforest',
-      \ 'nightfox': 'nightfox.nvim',
-      \ 'kanagawa': 'kanagawa.nvim',
-      \ 'catppuccin': 'catppuccin'
-      \ }
-
-let s:theme = utils#RandElement(keys(s:theme2dir))
-let s:colorscheme_func = printf('s:theme_setup_dict.%s()', s:theme)
-
-if !has_key(s:theme_setup_dict, s:theme)
-  let s:msg = "Invalid colorscheme function: " . s:colorscheme_func
-  call v:lua.vim.notify(s:msg, 'error', {'title': 'nvim-config'})
-  finish
-endif
-
-let s:status = utils#add_pack(s:theme2dir[s:theme])
-if !s:status
-  echomsg printf("Theme %s not installed. Run PackerSync to install.", s:theme)
-  finish
-endif
-
-execute 'call ' . s:colorscheme_func
-if g:logging_level == 'debug'
-  let s:msg1 = "Colorscheme: " . s:theme
-  call v:lua.vim.notify(s:msg1, 'info', {'title': 'nvim-config'})
-endif

docs/README.md

@@ -2,9 +2,48 @@ This doc summarizes how to install and use this configuration in detail.
 
 # Pre-requisite
 
+## Terminal emulators
+
+Which [terminal emulator](https://en.wikipedia.org/wiki/Terminal_emulator) we choose to use greatly affects the appearance and features of Nvim.
+Since Nvim supports true colors, terminals that support true colors are preferred.
+For a list of terminals that support true colors, see [here](https://github.com/termstandard/colors).
+
+For macOS, we can use [kitty](https://sw.kovidgoyal.net/kitty/), [iterm2](https://www.iterm2.com/), [wezterm](https://wezfurlong.org/wezterm/) or [Alacritty](https://github.com/jwilm/alacritty).
+
+If you ssh to Linux server on Windows, I recommend [wsltty](https://github.com/mintty/wsltty) and [Cygwin](https://www.cygwin.com/),
+both of them use [mintty](https://github.com/mintty/mintty) as the terminal emulator.
+For the latest version of Windows 10, you can also try [Windows Terminal](https://github.com/microsoft/terminal).
+
+## Patched Fonts
+
+Since statusline or file explorer plugins often use Unicode symbols not available in normal font,
+we need to install a patched font from the [nerd-fonts](https://github.com/ryanoasis/nerd-fonts) project.
+
+# Automatic installation
+
+## Automatic Installation for Linux
+
+To set up a workable Nvim environment on Linux,
+I use [a bash script](nvim_setup_linux.sh) to automatically install necessary dependencies, Nvim itself and configs.
+
+Note that the variable `PYTHON_INSTALLED`, `SYSTEM_PYTHON` and `ADD_TO_SYSTEM_PATH` in the script
+should be set properly based on your environment.
+
+## Automatic installation for Windows
+
+Run the script [nvim_setup_windows.ps1](nvim_setup_windows.ps1) in PowerShell **with Administrator rights**:
+
+```
+.\docs\nvim_setup_windows.ps1
+```
+
+# Manual install
+
 There are a few dependencies if we want to use Nvim for efficient editing and development work.
 
-## Python
+## Dependencies
+
+### Python
 
 A lot of Nvim plugins are mainly written in Python, so we must install Python 3.
 The easiest way to install is via [Anaconda](https://docs.anaconda.com/anaconda/install/index.html) or [Miniconda](https://docs.conda.io/en/latest/miniconda.html).
@@ -12,7 +51,7 @@ The easiest way to install is via [Anaconda](https://docs.anaconda.com/anaconda/
 After installation, make sure that you can run `python --version`,
 and that the output should be Python 3.x.
 
-## Pynvim
+### Pynvim
 
 Nvim relies on [pynvim](https://github.com/neovim/pynvim) to communicate with plugins that utilize its Python binding.
 Pynvim is required by plugins such as [wilder.nvim](https://github.com/gelguy/wilder.nvim).
@@ -21,7 +60,7 @@ Pynvim is required by plugins such as [wilder.nvim](https://github.com/gelguy/wi
 pip install -U pynvim
 ```
 
-## python-lsp-server
+### python-lsp-server
 
 [python-lsp-server (pylsp)](https://github.com/python-lsp/python-lsp-server) is a Python [Language Server](https://microsoft.github.io/language-server-protocol/) for completion, linting, go to definition, etc.
 
@@ -33,7 +72,7 @@ Note the executable for pylsp is also named `pylsp`. You need to set its PATH co
 If you use pip from Anaconda, the executable path may be something like `$CONDA_ROOT/bin/pylsp`.
 For native python, the path for pylsp may be like `$HOME/.local/bin/pylsp`
 
-## Node
+### Node
 
 We need to install node.js from [here](https://nodejs.org/en/download/).
 For Linux, you can use the following script:
@@ -60,7 +99,7 @@ source ~/.bash_profile
 # source ~/.zshrc
 ```
 
-## vim-language-server
+### vim-language-server
 
 [vim-language-server](https://github.com/iamcco/vim-language-server) provides completion for vim script. We can install vim-language-server globally:
 
@@ -70,7 +109,7 @@ npm install -g vim-language-server
 
 vim-language-server is installed in the same directory as the node executable.
 
-## Git
+### Git
 
 Git is required by plugin manager [packer.nvim](https://github.com/wbthomason/packer.nvim) and other git-related plugins.
 
@@ -79,7 +118,7 @@ The version of Git on the Linux system may be too old so that plugins may break.
 Check [here](https://jdhao.github.io/2021/03/27/upgrade_git_on_linux/) on how to install and set up the latest version of Git.
 For Windows, install [Git for Windows](https://git-scm.com/download/win) and make sure you can run `git` from command line.
 
-## ctags
+### ctags
 
 In order to use tags related plugins such as [vista.vim](https://github.com/liuchengxu/vista.vim), we need to install a ctags distribution.
 Universal-ctags is preferred.
@@ -102,7 +141,7 @@ choco install universal-ctags
 
 Set its PATH properly and make sure you can run `ctags` from command line.
 
-## Ripgrep
+### Ripgrep
 
 [Ripgrep](https://github.com/BurntSushi/ripgrep), aka, `rg`, is a fast grepping tool available for both Linux, Windows and macOS.
 It is used by several searching plugins.
@@ -112,7 +151,7 @@ For Linux, we can download the [binary release](https://github.com/BurntSushi/ri
 
 Set its PATH properly and make sure you can run `rg` from command line.
 
-## Linters
+### Linters
 
 A linter is a tool to check the source code for possible style and syntax issues.
 Based on the programming languages we use, we may need to install various linters.
@@ -122,35 +161,18 @@ Based on the programming languages we use, we may need to install various linter
 
 Set their PATH properly and make sure you can run `pylint`, `flake8` and `vint` from command line.
 
-## Terminal emulators
-
-Which [terminal emulator](https://en.wikipedia.org/wiki/Terminal_emulator) we choose to use greatly affects the appearance and features of Nvim.
-Since Nvim supports true colors, terminals that support true colors are preferred.
-For a list of terminals that support true colors, see [here](https://github.com/termstandard/colors).
-
-For macOS, we can use [kitty](https://sw.kovidgoyal.net/kitty/), [iterm2](https://www.iterm2.com/), [wezterm](https://wezfurlong.org/wezterm/) or [Alacritty](https://github.com/jwilm/alacritty).
-
-If you ssh to Linux server on Windows, I recommend [wsltty](https://github.com/mintty/wsltty) and [Cygwin](https://www.cygwin.com/),
-both of them use [mintty](https://github.com/mintty/mintty) as the terminal emulator.
-For the latest version of Windows 10, you can also try [Windows Terminal](https://github.com/microsoft/terminal).
-
-## Patched Fonts
-
-Since statusline or file explorer plugins often use Unicode symbols not available in normal font,
-we need to install a patched font from the [nerd-fonts](https://github.com/ryanoasis/nerd-fonts) project.
-
-# Install Nvim
+## Install Nvim
 
 There are various ways to install Nvim depending on your system.
 This config is only maintained for [the latest nvim stable release](https://github.com/neovim/neovim/releases/tag/stable).
 
-## Linux
+### Linux
 
 You can directly download the binary release from [here](https://github.com/neovim/neovim/releases/download/stable/nvim-linux64.tar.gz).
 You can also use the system package manager to install nvim,
 but that is not reliable since the latest version may not be available.
 
-## Windows
+### Windows
 
 You may download from [nvim release](https://github.com/neovim/neovim/releases/download/stable/nvim-win64.zip) from GitHub and manually extract it.
 
@@ -164,7 +186,7 @@ choco install neovim
 # scoop install neovim
 ```
 
-## macOS
+### macOS
 
 It is recommended to install neovim via [Homebrew](https://brew.sh/) on macOS. Simply run the following command:
 
@@ -175,9 +197,11 @@ brew install neovim
 After installing Nvim, we need to set the path to nvim correctly.
 **Make sure that you can run `nvim` from the command line after all these setups**.
 
-# Setting up Nvim
+## Setting up Nvim
 
-## Install plugin manager packer.nvim
+After installing nvim and all the dependencies, we will install plugin managers and set up this config.
+
+### Install plugin manager packer.nvim
 
 I use packer.nvim to manage my plugins. We need to install packer.nvim on our system first.
 
@@ -193,7 +217,7 @@ For macOS and Linux, run the following command:
 git clone --depth=1 https://github.com/wbthomason/packer.nvim ~/.local/share/nvim/site/pack/packer/opt/packer.nvim
 ```
 
-## How to install this configuration
+### How to install this configuration
 
 On Linux and macOS, the directory is `~/.config/nvim`.
 On Windows, the config directory is `$HOME/AppData/Local/nvim`[^1].
@@ -207,18 +231,4 @@ git clone --depth=1 https://github.com/jdhao/nvim-config.git .
 After that, when we first open nvim, run command `:PackerSync` to install all the plugins.
 Since I use quite a lot of plugins (more than 60), it may take some time to install all of them.
 
-# Automatic installation
-
-## Automatic Installation for Linux #
-
-To set up a workable Nvim environment on Linux,
-I use [a bash script](nvim_setup_linux.sh) to automatically install necessary dependencies, Nvim itself and configs.
-
-Note that the variable `PYTHON_INSTALLED`, `SYSTEM_PYTHON` and `ADD_TO_SYSTEM_PATH` in the script
-should be set properly based on your environment.
-
-## Automatic installation for Windows
-
-Run script [nvim_setup_windows.ps1](nvim_setup_windows.ps1) under PowerShell.
-
 [^1]: Use `echo %userprofile%` to see where your `$HOME` is.

docs/nvim_setup_linux.sh

@@ -112,6 +112,7 @@ if [[ -z "$(command -v node)" ]]; then
     fi
 else
     echo "Node.js is already installed. Skip installing it."
+    NODE_DIR="$(realpath $(dirname $(which node))/..)"
 fi
 
 # Install vim-language-server
@@ -120,6 +121,35 @@ fi
 # Install bash-language-server
 "$NODE_DIR/bin/npm" install -g bash-language-server
 
+#######################################################################
+#                         lua-language-server                         #
+#######################################################################
+SUMNEKO_LUA_DIR=$HOME/tools/lua-language-server
+SUMNEKO_LUA_SRC_NAME=$HOME/packages/lua-language-server.tar.gz
+SUMNEKO_LUA_LINK="https://github.com/sumneko/lua-language-server/releases/download/3.5.3/lua-language-server-3.5.3-linux-x64.tar.gz"
+
+if [[ -z "$(command -v lua-language-server)" ]] && [[ ! -f "$SUMNEKO_LUA_DIR/bin/lua-language-server" ]]; then
+    echo 'Install lua-language-server'
+    if [[ ! -f $SUMNEKO_LUA_SRC_NAME ]]; then
+        echo "Downloading lua-language-server and renaming"
+        wget $SUMNEKO_LUA_LINK -O "$SUMNEKO_LUA_SRC_NAME"
+    fi
+
+    if [[ ! -d "$SUMNEKO_LUA_DIR" ]]; then
+        echo "Creating lua-language-server directory under tools directory"
+        mkdir -p "$SUMNEKO_LUA_DIR"
+        echo "Extracting to directory $SUMNEKO_LUA_DIR"
+
+        tar zxvf "$SUMNEKO_LUA_SRC_NAME" -C "$SUMNEKO_LUA_DIR"
+    fi
+
+    if [[ "$ADD_TO_SYSTEM_PATH" = true ]] && [[ "$USE_BASH_SHELL" = true ]]; then
+        echo "export PATH=\"$SUMNEKO_LUA_DIR/bin:\$PATH\"" >> "$HOME/.bash_profile"
+    fi
+else
+    echo "lua-language-server is already installed. Skip installing it."
+fi
+
 #######################################################################
 #                            Ripgrep part                             #
 #######################################################################
@@ -145,8 +175,8 @@ if [[ -z "$(command -v rg)" ]] && [[ ! -f "$RIPGREP_DIR/rg" ]]; then
     fi
 
     # set up manpath and zsh completion for ripgrep
-    mkdir -p $HOME/tools/ripgrep/doc/man/man1
-    mv $HOME/tools/ripgrep/doc/rg.1 $HOME/tools/ripgrep/doc/man/man1
+    mkdir -p "$HOME/tools/ripgrep/doc/man/man1"
+    mv "$HOME/tools/ripgrep/doc/rg.1" "$HOME/tools/ripgrep/doc/man/man1"
 
     if [[ "$USE_BASH_SHELL" = true ]]; then
         echo 'export MANPATH=$HOME/tools/ripgrep/doc/man:$MANPATH' >> "$HOME/.bash_profile"
@@ -216,6 +246,7 @@ fi
 
 echo "Setting up config and installing plugins"
 if [[ -d "$NVIM_CONFIG_DIR" ]]; then
+    rm -rf "$NVIM_CONFIG_DIR.backup"
     mv "$NVIM_CONFIG_DIR" "$NVIM_CONFIG_DIR.backup"
 fi
 

docs/nvim_setup_windows.ps1

@@ -1,6 +1,8 @@
-# Install scoop
+# Set policy to avoid errors
 Set-ExecutionPolicy RemoteSigned -scope CurrentUser
-iwr -useb get.scoop.sh | iex
+
+# Install scoop
+Invoke-WebRequest -UseBasicParsing get.scoop.sh | Invoke-Expression
 
 # Install node
 scoop install nodejs
@@ -18,7 +20,7 @@ npm install -g vim-language-server
 # Install bash-language-server
 npm install -g bash-language-server
 
-# Install miniconda3
+# Install miniconda3 (for Python)
 scoop install miniconda3
 
 # Install pynvim
@@ -27,6 +29,27 @@ pip install -U pynvim
 # Install python-language-server
 pip install 'python-lsp-server[all]' pylsp-mypy pyls-isort
 
+# Install visual c++ redistribution
+scoop install vcredist2022
+
+# Install 7zip
+scoop install 7zip
+
+# Install lua-language-server
+$sumneko_lua_link = "https://github.com/sumneko/lua-language-server/releases/download/3.5.3/lua-language-server-3.5.3-win32-x64.zip"
+$sumneko_lua_install_dir = "D:\portable_tools"
+$sumneko_lua_src_dir = "$sumneko_lua_install_dir\lua-language-server.zip"
+$sumneko_lua_dir = "$sumneko_lua_install_dir\lua-language-server"
+
+# Download file, ref: https://stackoverflow.com/a/51225744/6064933
+Invoke-WebRequest $sumneko_lua_link -OutFile "$sumneko_lua_src_dir"
+
+# Extract the zip file using 7zip, ref: https://stackoverflow.com/a/41933215/6064933
+7z x "$sumneko_lua_src_dir" -o"$sumneko_lua_dir"
+
+# Setup PATH env variable, ref: https://stackoverflow.com/q/714877/6064933
+[Environment]::SetEnvironmentVariable("Path", $env:Path + ";$sumneko_lua_dir\bin", "Machine")
+
 # Install neovim nightly
 scoop bucket add versions
 scoop install neovim

ginit.vim

@@ -59,3 +59,16 @@ if exists('g:fvim_loaded')
 
   FVimUIPopupMenu v:false
 endif
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+"                             config for neovide                             "
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+if exists("g:neovide")
+  set guifont=Hack\ NF:h10
+  let g:neovide_transparency = 1.0
+  let g:neovide_cursor_animation_length = 0.1
+  let g:neovide_cursor_trail_size=0.3
+  let g:neovide_cursor_vfx_mode = ""
+  let g:neovide_cursor_vfx_particle_density=10.0
+  let g:neovide_cursor_vfx_opacity=150.0
+endif

init.lua

@@ -0,0 +1,38 @@
+-- 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 api = vim.api
+local utils = require("utils")
+
+-- check if we have the latest stable version of nvim
+local expected_ver = "0.7.2"
+local nvim_ver = utils.get_nvim_version()
+
+if nvim_ver ~= expected_ver then
+  local msg = string.format("Unsupported nvim version: expect %s, but got %s instead!", expected_ver, nvim_ver)
+  api.nvim_err_writeln(msg)
+  return
+end
+
+local core_conf_files = {
+  "globals.lua", -- some global settings
+  "options.vim", -- setting options in nvim
+  "autocommands.vim", -- various autocommands
+  "mappings.lua", -- all the user-defined mappings
+  "plugins.vim", -- all the plugins installed and their configurations
+  "colorschemes.lua", -- colorscheme settings
+}
+
+-- 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/config/bqf.lua

@@ -1,6 +1,6 @@
-require("bqf").setup({
+require("bqf").setup {
   auto_resize_height = false,
   preview = {
     auto_preview = false,
-  }
-})
+  },
+}

lua/config/bufferline.lua

@@ -1,11 +1,14 @@
-require("bufferline").setup({
+require("bufferline").setup {
   options = {
     numbers = "buffer_id",
     close_command = "bdelete! %d",
     right_mouse_command = nil,
     left_mouse_command = "buffer %d",
     middle_mouse_command = nil,
-    indicator_icon = "▎",
+    indicator = {
+      icon = "▎", -- this should be omitted if indicator style is not 'icon'
+      style = "icon",
+    },
     buffer_close_icon = "",
     modified_icon = "●",
     close_icon = "",
@@ -40,4 +43,4 @@ require("bufferline").setup({
     always_show_bufferline = true,
     sort_by = "id",
   },
-})
+}

lua/config/dashboard-nvim.lua

@@ -52,8 +52,8 @@ dashboard.custom_center = {
     desc = "Quit Nvim                               ",
     -- desc = "Quit Nvim                               ",
     action = "qa",
-    shortcut = "q           "
-  }
+    shortcut = "q           ",
+  },
 }
 
 vim.cmd([[

lua/config/fidget-nvim.lua

@@ -0,0 +1 @@
+require("fidget").setup {}

lua/config/fugitive.lua

@@ -0,0 +1,8 @@
+local keymap = vim.keymap
+
+keymap.set("n", "<leader>gs", "<cmd>Git<cr>", { desc = "Git status" })
+keymap.set("n", "<leader>gw", "<cmd>Gwrite<cr>", { desc = "Git add" })
+keymap.set("n", "<leader>gc", "<cmd>Git commit<cr>", { desc = "Git commit" })
+keymap.set("n", "<leader>gd", "<cmd>Gdiffsplit<cr>", { desc = "Git diff" })
+keymap.set("n", "<leader>gpl", "<cmd>Git pull<cr>", { desc = "Git pull" })
+keymap.set("n", "<leader>gpu", "<cmd>15 split|term git push<cr>", { desc = "Git push" })

lua/config/git-linker.lua

@@ -0,0 +1,15 @@
+local keymap = vim.keymap
+local gitlinker = require("gitlinker")
+
+gitlinker.setup {
+  mappings = nil,
+}
+
+keymap.set({ "n", "v" }, "<leader>gl", "", {
+  silent = true,
+  desc = "get git permlink",
+  callback = function()
+    local mode = string.lower(vim.fn.mode())
+    gitlinker.get_buf_range_url(mode)
+  end,
+})

lua/config/gitsigns.lua

@@ -0,0 +1,45 @@
+local gs = require("gitsigns")
+
+gs.setup {
+  signs = {
+    add = { hl = "GitSignsAdd", text = "+", numhl = "GitSignsAddNr", linehl = "GitSignsAddLn" },
+    change = { hl = "GitSignsChange", text = "~", numhl = "GitSignsChangeNr", linehl = "GitSignsChangeLn" },
+    delete = { hl = "GitSignsDelete", text = "_", numhl = "GitSignsDeleteNr", linehl = "GitSignsDeleteLn" },
+    topdelete = { hl = "GitSignsDelete", text = "‾", numhl = "GitSignsDeleteNr", linehl = "GitSignsDeleteLn" },
+    changedelete = { hl = "GitSignsChange", text = "│", numhl = "GitSignsChangeNr", linehl = "GitSignsChangeLn" },
+  },
+  on_attach = function(bufnr)
+    local function map(mode, l, r, opts)
+      opts = opts or {}
+      opts.buffer = bufnr
+      vim.keymap.set(mode, l, r, opts)
+    end
+
+    -- Navigation
+    map("n", "]c", function()
+      if vim.wo.diff then
+        return "]c"
+      end
+      vim.schedule(function()
+        gs.next_hunk()
+      end)
+      return "<Ignore>"
+    end, { expr = true, desc = "next hunk" })
+
+    map("n", "[c", function()
+      if vim.wo.diff then
+        return "[c"
+      end
+      vim.schedule(function()
+        gs.prev_hunk()
+      end)
+      return "<Ignore>"
+    end, { expr = true, desc = "previous hunk" })
+
+    -- Actions
+    map("n", "<leader>hp", gs.preview_hunk)
+    map("n", "<leader>hb", function()
+      gs.blame_line { full = true }
+    end)
+  end,
+}

lua/config/hlslens.lua

@@ -1,34 +1,38 @@
-require('hlslens').setup({
-    calm_down = true,
-    nearest_only = true,
-})
+local api = vim.api
+local keymap = vim.keymap
+
+local hlslens = require("hlslens")
+
+hlslens.setup {
+  calm_down = true,
+  nearest_only = true,
+}
 
 local activate_hlslens = function(direction)
   local cmd = string.format("normal! %s%szzzv", vim.v.count1, direction)
-  local status, msg = pcall(vim.fn.execute, cmd)
-  -- 13 is the index where real error message starts
-  msg = msg:sub(13)
+  local status, msg = pcall(vim.cmd, cmd)
 
   if not status then
-    vim.api.nvim_echo({{msg, "ErrorMsg"}}, false, {})
+    -- 13 is the index where real error message starts
+    msg = msg:sub(13)
+    api.nvim_err_writeln(msg)
     return
   end
-  require('hlslens').start()
+
+  hlslens.start()
 end
 
-vim.keymap.set('n', 'n', '',
-{
-  noremap = true,
-  silent = true,
-  callback = function() activate_hlslens('n') end
+keymap.set("n", "n", "", {
+  callback = function()
+    activate_hlslens("n")
+  end,
 })
 
-vim.keymap.set('n', 'N', '',
-{
-  noremap = true,
-  silent = true,
-  callback = function() activate_hlslens('N') end
+keymap.set("n", "N", "", {
+  callback = function()
+    activate_hlslens("N")
+  end,
 })
 
-vim.keymap.set('n', '*', "<Plug>(asterisk-z*)<Cmd>lua require('hlslens').start()<CR>", { silent = true })
-vim.keymap.set('n', '#', "<Plug>(asterisk-z#)<Cmd>lua require('hlslens').start()<CR>", { silent = true })
+keymap.set("n", "*", "<Plug>(asterisk-z*)<Cmd>lua require('hlslens').start()<CR>")
+keymap.set("n", "#", "<Plug>(asterisk-z#)<Cmd>lua require('hlslens').start()<CR>")

lua/config/indent-blankline.lua

@@ -1,23 +1,29 @@
-require("indent_blankline").setup({
+local api = vim.api
+
+local exclude_ft = { "help", "git", "markdown", "snippets", "text", "gitconfig", "alpha" }
+require("indent_blankline").setup {
   -- U+2502 may also be a good choice, it will be on the middle of cursor.
   -- U+250A is also a good choice
   char = "▏",
   show_end_of_line = false,
   disable_with_nolist = true,
   buftype_exclude = { "terminal" },
-  filetype_exclude = { "help", "git", "markdown", "snippets", "text", "gitconfig", "alpha" },
+  filetype_exclude = exclude_ft,
+}
+
+local gid = api.nvim_create_augroup("indent_blankline", { clear = true })
+api.nvim_create_autocmd("InsertEnter", {
+  pattern = "*",
+  group = gid,
+  command = "IndentBlanklineDisable",
 })
 
-vim.cmd([[
-function! Should_activate_indentblankline() abort
-  if index(g:indent_blankline_filetype_exclude, &filetype) == -1
-    IndentBlanklineEnable
-  endif
-endfunction
-
-augroup indent_blankline
-  autocmd!
-  autocmd InsertEnter * IndentBlanklineDisable
-  autocmd InsertLeave * call Should_activate_indentblankline()
-augroup END
-]])
+api.nvim_create_autocmd("InsertLeave", {
+  pattern = "*",
+  group = gid,
+  callback = function()
+    if not vim.tbl_contains(exclude_ft, vim.bo.filetype) then
+      vim.cmd([[IndentBlanklineEnable]])
+    end
+  end,
+})

lua/config/iron.lua

@@ -1,7 +1,7 @@
 local iron = require("iron")
-iron.core.set_config({
+iron.core.set_config {
   preferred = {
     python = "ipython",
   },
   repl_open_cmd = "vertical 120 split",
-})
+}

lua/config/lsp.lua

@@ -1,60 +1,72 @@
 local fn = vim.fn
 local api = vim.api
+local keymap = vim.keymap
 local lsp = vim.lsp
 
 local utils = require("utils")
 
 local custom_attach = function(client, bufnr)
   -- Mappings.
-  local opts = { silent = true, buffer = bufnr }
-  vim.keymap.set("n", "gd", vim.lsp.buf.definition, opts)
-  vim.keymap.set("n", "<C-]>", vim.lsp.buf.definition, opts)
-  vim.keymap.set("n", "K", vim.lsp.buf.hover, opts)
-  vim.keymap.set("n", "<C-k>", vim.lsp.buf.signature_help, opts)
-  vim.keymap.set("n", "<space>wa", vim.lsp.buf.add_workspace_folder, opts)
-  vim.keymap.set("n", "<space>wr", vim.lsp.buf.remove_workspace_folder, opts)
-  vim.keymap.set("n", "<space>wl", function() print(vim.inspect(vim.lsp.buf.list_workspace_folders())) end, opts)
-  vim.keymap.set("n", "<space>rn", vim.lsp.buf.rename, opts)
-  vim.keymap.set("n", "gr", vim.lsp.buf.references, opts)
-  vim.keymap.set("n", "[d", vim.diagnostic.goto_prev, opts)
-  vim.keymap.set("n", "]d", vim.diagnostic.goto_next, opts)
-  vim.keymap.set("n", "<space>q", function() vim.diagnostic.setqflist({open = true}) end, opts)
-  vim.keymap.set("n", "<space>ca", vim.lsp.buf.code_action, opts)
+  local map = function(mode, l, r, opts)
+    opts = opts or {}
+    opts.silent = true
+    opts.buffer = bufnr
+    keymap.set(mode, l, r, opts)
+  end
 
-  vim.api.nvim_create_autocmd("CursorHold", {
-    buffer=bufnr,
+  map("n", "gd", vim.lsp.buf.definition, { desc = "go to definition" })
+  map("n", "<C-]>", vim.lsp.buf.definition)
+  map("n", "K", vim.lsp.buf.hover)
+  map("n", "<C-k>", vim.lsp.buf.signature_help)
+  map("n", "<space>rn", vim.lsp.buf.rename, { desc = "varialbe rename" })
+  map("n", "gr", vim.lsp.buf.references, { desc = "show references" })
+  map("n", "[d", vim.diagnostic.goto_prev, { desc = "previous diagnostic" })
+  map("n", "]d", vim.diagnostic.goto_next, { desc = "next diagnostic" })
+  map("n", "<space>q", function()
+    vim.diagnostic.setqflist { open = true }
+  end, { desc = "put diagnostic to qf" })
+  map("n", "<space>ca", vim.lsp.buf.code_action, { desc = "LSP code action" })
+  map("n", "<space>wa", vim.lsp.buf.add_workspace_folder, { desc = "add workspace folder" })
+  map("n", "<space>wr", vim.lsp.buf.remove_workspace_folder, { desc = "remove workspace folder" })
+  map("n", "<space>wl", function()
+    inspect(vim.lsp.buf.list_workspace_folders())
+  end, { desc = "list workspace folder" })
+
+  -- Set some key bindings conditional on server capabilities
+  if client.resolved_capabilities.document_formatting then
+    map("n", "<space>f", vim.lsp.buf.formatting_sync, { desc = "format code" })
+  end
+  if client.resolved_capabilities.document_range_formatting then
+    map("x", "<space>f", vim.lsp.buf.range_formatting, { desc = "range format" })
+  end
+
+  api.nvim_create_autocmd("CursorHold", {
+    buffer = bufnr,
     callback = function()
-      local opts = {
+      local float_opts = {
         focusable = false,
         close_events = { "BufLeave", "CursorMoved", "InsertEnter", "FocusLost" },
-        border = 'rounded',
-        source = 'always',  -- show source in diagnostic popup window
-        prefix = ' '
+        border = "rounded",
+        source = "always", -- show source in diagnostic popup window
+        prefix = " ",
       }
 
       if not vim.b.diagnostics_pos then
         vim.b.diagnostics_pos = { nil, nil }
       end
 
-      local cursor_pos = vim.api.nvim_win_get_cursor(0)
-      if (cursor_pos[1] ~= vim.b.diagnostics_pos[1] or cursor_pos[2] ~= vim.b.diagnostics_pos[2]) and
-        #vim.diagnostic.get() > 0
+      local cursor_pos = api.nvim_win_get_cursor(0)
+      if
+        (cursor_pos[1] ~= vim.b.diagnostics_pos[1] or cursor_pos[2] ~= vim.b.diagnostics_pos[2])
+        and #vim.diagnostic.get() > 0
       then
-          vim.diagnostic.open_float(nil, opts)
+        vim.diagnostic.open_float(nil, float_opts)
       end
 
       vim.b.diagnostics_pos = cursor_pos
-    end
+    end,
   })
 
-  -- Set some key bindings conditional on server capabilities
-  if client.resolved_capabilities.document_formatting then
-    vim.keymap.set("n", "<space>f", vim.lsp.buf.formatting_sync, opts)
-  end
-  if client.resolved_capabilities.document_range_formatting then
-    vim.keymap.set("x", "<space>f", vim.lsp.buf.range_formatting, opts)
-  end
-
   -- The blow command will highlight the current variable and its usages in the buffer.
   if client.resolved_capabilities.document_highlight then
     vim.cmd([[
@@ -69,20 +81,20 @@ local custom_attach = function(client, bufnr)
     ]])
   end
 
-  if vim.g.logging_level == 'debug' then
+  if vim.g.logging_level == "debug" then
     local msg = string.format("Language server %s started!", client.name)
-    vim.notify(msg, 'info', {title = 'Nvim-config'})
+    vim.notify(msg, vim.log.levels.DEBUG, { title = "Nvim-config" })
   end
 end
 
 local capabilities = lsp.protocol.make_client_capabilities()
-capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
+capabilities = require("cmp_nvim_lsp").update_capabilities(capabilities)
 capabilities.textDocument.completion.completionItem.snippetSupport = true
 
 local lspconfig = require("lspconfig")
 
-if utils.executable('pylsp') then
-  lspconfig.pylsp.setup({
+if utils.executable("pylsp") then
+  lspconfig.pylsp.setup {
     on_attach = custom_attach,
     settings = {
       pylsp = {
@@ -100,9 +112,9 @@ if utils.executable('pylsp') then
       debounce_text_changes = 200,
     },
     capabilities = capabilities,
-  })
+  }
 else
-  vim.notify("pylsp not found!", 'warn', {title = 'Nvim-config'})
+  vim.notify("pylsp not found!", vim.log.levels.WARN, { title = "Nvim-config" })
 end
 
 -- if utils.executable('pyright') then
@@ -111,78 +123,72 @@ end
 --     capabilities = capabilities
 --   }
 -- else
---   vim.notify("pyright not found!", 'warn', {title = 'Nvim-config'})
+--   vim.notify("pyright not found!", vim.log.levels.WARN, {title = 'Nvim-config'})
 -- end
 
-if utils.executable('clangd') then
-  lspconfig.clangd.setup({
+if utils.executable("clangd") then
+  lspconfig.clangd.setup {
     on_attach = custom_attach,
     capabilities = capabilities,
     filetypes = { "c", "cpp", "cc" },
     flags = {
       debounce_text_changes = 500,
     },
-  })
+  }
 else
-  vim.notify("clangd not found!", 'warn', {title = 'Nvim-config'})
+  vim.notify("clangd not found!", vim.log.levels.WARN, { title = "Nvim-config" })
 end
 
 -- set up vim-language-server
-if utils.executable('vim-language-server') then
-  lspconfig.vimls.setup({
+if utils.executable("vim-language-server") then
+  lspconfig.vimls.setup {
     on_attach = custom_attach,
     flags = {
       debounce_text_changes = 500,
     },
     capabilities = capabilities,
-  })
+  }
 else
-  vim.notify("vim-language-server not found!", 'warn', {title = 'Nvim-config'})
+  vim.notify("vim-language-server not found!", vim.log.levels.WARN, { title = "Nvim-config" })
 end
 
 -- set up bash-language-server
-if utils.executable('bash-language-server') then
-  lspconfig.bashls.setup({
+if utils.executable("bash-language-server") then
+  lspconfig.bashls.setup {
     on_attach = custom_attach,
     capabilities = capabilities,
-  })
+  }
 end
 
-local sumneko_binary_path = fn.exepath("lua-language-server")
-if vim.g.is_mac or vim.g.is_linux and sumneko_binary_path ~= "" then
-  local sumneko_root_path = fn.fnamemodify(sumneko_binary_path, ":h:h:h")
-
-  local runtime_path = vim.split(package.path, ";")
-  table.insert(runtime_path, "lua/?.lua")
-  table.insert(runtime_path, "lua/?/init.lua")
-
-  lspconfig.sumneko_lua.setup({
+if utils.executable("lua-language-server") then
+  -- settings for lua-language-server can be found on https://github.com/sumneko/lua-language-server/wiki/Settings .
+  lspconfig.sumneko_lua.setup {
     on_attach = custom_attach,
-    cmd = { sumneko_binary_path, "-E", sumneko_root_path .. "/main.lua" },
     settings = {
       Lua = {
         runtime = {
           -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
           version = "LuaJIT",
-          -- Setup your lua path
-          path = runtime_path,
         },
         diagnostics = {
           -- Get the language server to recognize the `vim` global
           globals = { "vim" },
         },
         workspace = {
-          -- Make the server aware of Neovim runtime files
-          library = api.nvim_get_runtime_file("", true),
-        },
-        -- Do not send telemetry data containing a randomized but unique identifier
-        telemetry = {
-          enable = false,
+          -- Make the server aware of Neovim runtime files,
+          -- see also https://github.com/sumneko/lua-language-server/wiki/Libraries#link-to-workspace .
+          -- Lua-dev.nvim also has similar settings for sumneko lua, https://github.com/folke/lua-dev.nvim/blob/main/lua/lua-dev/sumneko.lua .
+          library = {
+            fn.stdpath("data") .. "/site/pack/packer/opt/emmylua-nvim",
+            fn.stdpath("config"),
+          },
+          maxPreload = 2000,
+          preloadFileSize = 50000,
         },
       },
     },
     capabilities = capabilities,
-  })
+  }
 end
 
 -- Change diagnostic signs.
@@ -192,12 +198,12 @@ fn.sign_define("DiagnosticSignInformation", { text = "", texthl = "Diagnostic
 fn.sign_define("DiagnosticSignHint", { text = "", texthl = "DiagnosticSignHint" })
 
 -- global config for diagnostic
-vim.diagnostic.config({
+vim.diagnostic.config {
   underline = false,
   virtual_text = false,
   signs = true,
   severity_sort = true,
-})
+}
 
 -- lsp.handlers["textDocument/publishDiagnostics"] = lsp.with(lsp.diagnostic.on_publish_diagnostics, {
 --   underline = false,

lua/config/neoscroll.lua

@@ -1,6 +1,6 @@
-require("neoscroll").setup({
+require("neoscroll").setup {
   easing_function = "quadratic",
-})
+}
 
 local t = {}
 -- Syntax: t[keys] = {function, {function arguments}}

lua/config/nvim-cmp.lua

@@ -1,68 +1,68 @@
 -- Setup nvim-cmp.
-local cmp = require'cmp'
-local lspkind = require'lspkind'
+local cmp = require("cmp")
+local lspkind = require("lspkind")
 
-cmp.setup({
+cmp.setup {
   snippet = {
     expand = function(args)
       -- For `ultisnips` user.
       vim.fn["UltiSnips#Anon"](args.body)
     end,
   },
-  mapping = cmp.mapping.preset.insert({
-          ['<Tab>'] = function(fallback)
-            if cmp.visible() then
-              cmp.select_next_item()
-            else
-              fallback()
-            end
-          end,
-          ['<S-Tab>'] = function(fallback)
-            if cmp.visible() then
-              cmp.select_prev_item()
-            else
-              fallback()
-            end
-          end,
-          ['<CR>'] = cmp.mapping.confirm({ select = true }),
-          ['<C-e>'] = cmp.mapping.abort(),
-          ['<Esc>'] = cmp.mapping.close(),
-          ['<C-d>'] = cmp.mapping.scroll_docs(-4),
-          ['<C-f>'] = cmp.mapping.scroll_docs(4),
-        }),
+  mapping = cmp.mapping.preset.insert {
+    ["<Tab>"] = function(fallback)
+      if cmp.visible() then
+        cmp.select_next_item()
+      else
+        fallback()
+      end
+    end,
+    ["<S-Tab>"] = function(fallback)
+      if cmp.visible() then
+        cmp.select_prev_item()
+      else
+        fallback()
+      end
+    end,
+    ["<CR>"] = cmp.mapping.confirm { select = true },
+    ["<C-e>"] = cmp.mapping.abort(),
+    ["<Esc>"] = cmp.mapping.close(),
+    ["<C-d>"] = cmp.mapping.scroll_docs(-4),
+    ["<C-f>"] = cmp.mapping.scroll_docs(4),
+  },
   sources = {
-    { name = 'nvim_lsp' }, -- For nvim-lsp
-    { name = 'ultisnips' }, -- For ultisnips user.
-    { name = 'path' }, -- for path completion
-    { name = 'buffer', keyword_length = 4 }, -- for buffer word completion
-    { name = 'omni' },
-    { name = 'emoji', insert = true, } -- emoji completion
+    { name = "nvim_lsp" }, -- For nvim-lsp
+    { name = "ultisnips" }, -- For ultisnips user.
+    { name = "path" }, -- for path completion
+    { name = "buffer", keyword_length = 2 }, -- for buffer word completion
+    { name = "omni" },
+    { name = "emoji", insert = true }, -- emoji completion
   },
   completion = {
     keyword_length = 1,
-    completeopt = "menu,noselect"
+    completeopt = "menu,noselect",
   },
   view = {
-    entries = 'custom',
+    entries = "custom",
   },
   formatting = {
-    format = lspkind.cmp_format({
+    format = lspkind.cmp_format {
       mode = "symbol_text",
-      menu = ({
+      menu = {
         nvim_lsp = "[LSP]",
         ultisnips = "[US]",
         nvim_lua = "[Lua]",
         path = "[Path]",
         buffer = "[Buffer]",
         emoji = "[Emoji]",
-	      omni = "[Omni]",
-      }),
-    }),
+        omni = "[Omni]",
+      },
+    },
   },
-})
+}
 
 --  see https://github.com/hrsh7th/nvim-cmp/wiki/Menu-Appearance#how-to-add-visual-studio-code-dark-theme-colors-to-the-menu
-vim.cmd[[
+vim.cmd([[
   highlight! link CmpItemMenu Comment
   " gray
   highlight! CmpItemAbbrDeprecated guibg=NONE gui=strikethrough guifg=#808080
@@ -80,4 +80,4 @@ vim.cmd[[
   highlight! CmpItemKindKeyword guibg=NONE guifg=#D4D4D4
   highlight! CmpItemKindProperty guibg=NONE guifg=#D4D4D4
   highlight! CmpItemKindUnit guibg=NONE guifg=#D4D4D4
-]]
+]])

lua/config/nvim-notify.lua

@@ -1,10 +1,10 @@
 local nvim_notify = require("notify")
-nvim_notify.setup({
+nvim_notify.setup {
   -- Animation style
   stages = "fade_in_slide_out",
   -- Default timeout for notifications
   timeout = 1500,
   background_colour = "#2E3440",
-})
+}
 
 vim.notify = nvim_notify

lua/config/nvim-tree.lua

@@ -1,6 +1,7 @@
+local keymap = vim.keymap
 local nvim_tree = require("nvim-tree")
 
-nvim_tree.setup({
+nvim_tree.setup {
   auto_reload_on_write = true,
   disable_netrw = false,
   hijack_cursor = false,
@@ -111,9 +112,8 @@ nvim_tree.setup({
       profile = false,
     },
   },
-})
+}
 
-vim.keymap.set('n', '<space>s', function()
-  return require('nvim-tree').toggle(false, true)
-end,
-{ noremap = true, silent = true, desc = "toggle nvim-tree"})
+keymap.set("n", "<space>s", function()
+  return require("nvim-tree").toggle(false, true)
+end, { silent = true, desc = "toggle nvim-tree" })

lua/config/nvim_hop.lua

@@ -1,14 +1,20 @@
-vim.cmd[[ hi HopNextKey cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff ]]
-vim.cmd[[ hi HopNextKey1 cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff ]]
-vim.cmd[[ hi HopNextKey2 cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff ]]
+vim.cmd([[hi HopNextKey cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff]])
+vim.cmd([[hi HopNextKey1 cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff]])
+vim.cmd([[hi HopNextKey2 cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff]])
 
-require('hop').setup({
+local keymap = vim.keymap
+local hop = require("hop")
+hop.setup {
   case_insensitive = true,
-  char2_fallback_key = '<CR>',
-  quit_key='<Esc>',
-})
+  char2_fallback_key = "<CR>",
+  quit_key = "<Esc>",
+}
 
-vim.keymap.set('n', 'f', function()
-  return require('hop').hint_char2()
-end,
-{ silent = true, noremap = true, desc = "nvim-hop char2" })
+keymap.set({ "n", "v", "o" }, "f", "", {
+  silent = true,
+  noremap = true,
+  callback = function()
+    hop.hint_char2()
+  end,
+  desc = "nvim-hop char2",
+})

lua/config/statusline.lua

@@ -11,9 +11,9 @@ end
 local function ime_state()
   if vim.g.is_mac then
     -- ref: https://github.com/vim-airline/vim-airline/blob/master/autoload/airline/extensions/xkblayout.vim#L11
-    local layout = fn.libcall(vim.g.XkbSwitchLib, 'Xkb_Switch_getXkbLayout', '')
-    if layout == '0' then
-      return '[CN]'
+    local layout = fn.libcall(vim.g.XkbSwitchLib, "Xkb_Switch_getXkbLayout", "")
+    if layout == "0" then
+      return "[CN]"
     end
   end
 
@@ -27,7 +27,7 @@ local function trailing_space()
 
   local line_num = nil
 
-  for i=1, fn.line('$') do
+  for i = 1, fn.line("$") do
     local linetext = fn.getline(i)
     -- To prevent invalid escape error, we wrap the regex string with `[[]]`.
     local idx = fn.match(linetext, [[\v\s+$]])
@@ -53,28 +53,45 @@ local function mixed_indent()
 
   local space_pat = [[\v^ +]]
   local tab_pat = [[\v^\t+]]
-  local space_indent = fn.search(space_pat, 'nwc')
-  local tab_indent = fn.search(tab_pat, 'nwc')
+  local space_indent = fn.search(space_pat, "nwc")
+  local tab_indent = fn.search(tab_pat, "nwc")
   local mixed = (space_indent > 0 and tab_indent > 0)
   local mixed_same_line
   if not mixed then
-    mixed_same_line = fn.search([[\v^(\t+ | +\t)]], 'nwc')
+    mixed_same_line = fn.search([[\v^(\t+ | +\t)]], "nwc")
     mixed = mixed_same_line > 0
   end
-  if not mixed then return '' end
-  if mixed_same_line ~= nil and mixed_same_line > 0 then
-     return 'MI:'..mixed_same_line
+  if not mixed then
+    return ""
   end
-  local space_indent_cnt = fn.searchcount({pattern=space_pat, max_count=1e3}).total
-  local tab_indent_cnt =  fn.searchcount({pattern=tab_pat, max_count=1e3}).total
+  if mixed_same_line ~= nil and mixed_same_line > 0 then
+    return "MI:" .. mixed_same_line
+  end
+  local space_indent_cnt = fn.searchcount({ pattern = space_pat, max_count = 1e3 }).total
+  local tab_indent_cnt = fn.searchcount({ pattern = tab_pat, max_count = 1e3 }).total
   if space_indent_cnt > tab_indent_cnt then
-    return 'MI:'..tab_indent
+    return "MI:" .. tab_indent
   else
-    return 'MI:'..space_indent
+    return "MI:" .. space_indent
   end
 end
 
-require("lualine").setup({
+local diff = function()
+  local git_status = vim.b.gitsigns_status_dict
+  if git_status == nil then
+    return
+  end
+
+  local modify_num = git_status.changed
+  local remove_num = git_status.removed
+  local add_num = git_status.added
+
+  local info = { added = add_num, modified = modify_num, removed = remove_num }
+  -- vim.pretty_print(info)
+  return info
+end
+
+require("lualine").setup {
   options = {
     icons_enabled = true,
     theme = "auto",
@@ -87,16 +104,22 @@ require("lualine").setup({
   },
   sections = {
     lualine_a = { "mode" },
-    lualine_b = { "branch", "diff" },
+    lualine_b = {
+      "branch",
+      {
+        "diff",
+        source = diff,
+      },
+    },
     lualine_c = {
       "filename",
       {
         ime_state,
-        color = {fg = 'black', bg = '#f46868'}
+        color = { fg = "black", bg = "#f46868" },
       },
       {
         spell,
-        color = {fg = 'black', bg = '#a7c080'}
+        color = { fg = "black", bg = "#a7c080" },
       },
     },
     lualine_x = {
@@ -116,15 +139,15 @@ require("lualine").setup({
       "location",
       {
         "diagnostics",
-        sources = { "nvim_diagnostic" }
+        sources = { "nvim_diagnostic" },
       },
       {
         trailing_space,
-        color = "WarningMsg"
+        color = "WarningMsg",
       },
       {
         mixed_indent,
-        color = "WarningMsg"
+        color = "WarningMsg",
       },
     },
   },
@@ -137,6 +160,5 @@ require("lualine").setup({
     lualine_z = {},
   },
   tabline = {},
-  extensions = {'quickfix', 'fugitive', 'nvim-tree'},
-})
-
+  extensions = { "quickfix", "fugitive", "nvim-tree" },
+}

lua/config/treesitter.lua

@@ -1,8 +1,8 @@
-require("nvim-treesitter.configs").setup({
-  ensure_installed = {"python", "cpp", "lua", "vim"},
+require("nvim-treesitter.configs").setup {
+  ensure_installed = { "python", "cpp", "lua", "vim" },
   ignore_install = {}, -- List of parsers to ignore installing
   highlight = {
     enable = true, -- false will disable the whole extension
     disable = {}, -- list of language that will be disabled
   },
-})
+}

lua/config/which-key.lua

@@ -1,4 +1,4 @@
-require("which-key").setup({
+require("which-key").setup {
   plugins = {
     marks = true, -- shows a list of your marks on ' and `
     registers = true, -- shows your registers on " in NORMAL or <C-r> in INSERT mode
@@ -46,7 +46,7 @@ require("which-key").setup({
     align = "center", -- align columns left, center or right
   },
   ignore_missing = false, -- enable this to hide mappings for which you didn't specify a label
-  hidden = { "<silent>", "<cmd>", "<Cmd>", "<CR>", "call", "lua", "^:", "^ "}, -- hide mapping boilerplate
+  hidden = { "<silent>", "<cmd>", "<Cmd>", "<CR>", "call", "lua", "^:", "^ " }, -- hide mapping boilerplate
   show_help = true, -- show help message on the command line when the popup is visible
   triggers = "auto", -- automatically setup triggers
   -- triggers = {"<leader>"} -- or specify a list manually
@@ -57,4 +57,4 @@ require("which-key").setup({
     -- most people should not need to change this
     n = { "o", "O" },
   },
-})
+}

lua/config/zen-mode.lua

@@ -1,4 +1,4 @@
-require("zen-mode").setup({
+require("zen-mode").setup {
   window = {
     backdrop = 0.8, -- shade the backdrop of the Zen window. Set to 1 to keep the same as Normal
     width = 120,
@@ -12,4 +12,4 @@ require("zen-mode").setup({
       list = false, -- disable whitespace characters
     },
   },
-})
+}

lua/custom-autocmd.lua

@@ -0,0 +1,77 @@
+local fn = vim.fn
+local api = vim.api
+
+local utils = require("utils")
+
+-- Display a message when the current file is not in utf-8 format.
+-- Note that we need to use `unsilent` command here because of this issue:
+-- https://github.com/vim/vim/issues/4379
+api.nvim_create_autocmd({ "BufRead" }, {
+  pattern = "*",
+  group = api.nvim_create_augroup("non_utf8_file", { clear = true }),
+  callback = function()
+    if vim.bo.fileencoding ~= "utf-8" then
+      vim.notify("File not in UTF-8 format!", vim.log.levels.WARN, { title = "nvim-config" })
+    end
+  end,
+})
+
+-- highlight yanked region, see `:h lua-highlight`
+api.nvim_create_autocmd({ "TextYankPost" }, {
+  pattern = "*",
+  group = api.nvim_create_augroup("highlight_yank", { clear = true }),
+  callback = function()
+    vim.highlight.on_yank { higroup = "YankColor", timeout = 300 }
+  end,
+})
+
+-- Auto-generate packer_compiled.lua file
+api.nvim_create_autocmd({ "BufWritePost" }, {
+  pattern = "*/nvim/lua/plugins.lua",
+  group = api.nvim_create_augroup("packer_auto_compile", { clear = true }),
+  callback = function(ctx)
+    local cmd = "source " .. ctx.file
+    vim.cmd(cmd)
+    vim.cmd("PackerCompile")
+  end,
+})
+
+-- Auto-create dir when saving a file, in case some intermediate directory does not exist
+api.nvim_create_autocmd({ "BufWritePre" }, {
+  pattern = "*",
+  group = api.nvim_create_augroup("auto_create_dir", { clear = true }),
+  callback = function(ctx)
+    local dir = fn.fnamemodify(ctx.file, ":p:h")
+    utils.may_create_dir(dir)
+  end,
+})
+
+-- Automatically reload the file if it is changed outside of Nvim, see https://unix.stackexchange.com/a/383044/221410.
+-- It seems that `checktime` does not work in command line. We need to check if we are in command
+-- line before executing this command, see also https://vi.stackexchange.com/a/20397/15292 .
+api.nvim_create_augroup("auto_read", { clear = true })
+
+api.nvim_create_autocmd({ "FileChangedShellPost" }, {
+  pattern = "*",
+  group = "auto_read",
+  callback = function()
+    vim.notify("File changed on disk. Buffer reloaded!", vim.log.levels.WARN, { title = "nvim-config" })
+  end,
+})
+
+api.nvim_create_autocmd({ "FocusGained", "CursorHold" }, {
+  pattern = "*",
+  group = "auto_read",
+  callback = function()
+    if fn.getcmdwintype() == "" then
+      vim.cmd("checktime")
+    end
+  end,
+})
+
+-- Resize all windows when we resize the terminal
+api.nvim_create_autocmd("VimResized", {
+  group = api.nvim_create_augroup("win_autoresize", { clear = true }),
+  desc = "autoresize windows on resizing operation",
+  command = "wincmd =",
+})

lua/custom-map.lua

@@ -1,8 +0,0 @@
-local keymap = vim.keymap
-
--- Go to the begining and end of current line in insert mode quickly
-keymap.set('i', '<C-A>', '<HOME>')
-keymap.set('i', '<C-E>', '<END>')
-
--- Delete the character to the right of the cursor
-keymap.set('i', '<C-D>', '<DEL>')

lua/lua-init.lua

@@ -1,5 +0,0 @@
--- Some utility stuff
-require 'utils'
-
--- plugin installation
-require 'plugins'

lua/plugins.lua

@@ -1,14 +1,23 @@
 local utils = require("utils")
 local fn = vim.fn
 
-vim.g.package_home = fn.stdpath("data") .. "/site/pack/packer/"
-local packer_install_dir = vim.g.package_home .. "/opt/packer.nvim"
+-- The root dir to install all plugins. Plugins are under opt/ or start/ sub-directory.
+vim.g.plugin_home = fn.stdpath("data") .. "/site/pack/packer"
 
-local packer_repo = "https://github.com/wbthomason/packer.nvim"
-local install_cmd = string.format("10split |term git clone --depth=1 %s %s", packer_repo, packer_install_dir)
+-- Where to install packer.nvim -- the package manager (we make it opt)
+local packer_dir = vim.g.plugin_home .. "/opt/packer.nvim"
+
+-- Whether this is a fresh install, i.e., packer itself and plugins have not been installed.
+local fresh_install = false
 
 -- Auto-install packer in case it hasn't been installed.
-if fn.glob(packer_install_dir) == "" then
+if fn.glob(packer_dir) == "" then
+  fresh_install = true
+
+  -- Now we need to install packer.nvim first.
+  local packer_repo = "https://github.com/wbthomason/packer.nvim"
+  local install_cmd = string.format("!git clone --depth=1 %s %s", packer_repo, packer_dir)
+
   vim.api.nvim_echo({ { "Installing packer.nvim", "Type" } }, true, {})
   vim.cmd(install_cmd)
 end
@@ -17,352 +26,356 @@ end
 vim.cmd("packadd packer.nvim")
 
 local packer = require("packer")
-local packer_util = require('packer.util')
+local packer_util = require("packer.util")
 
-packer.startup({
+packer.startup {
   function(use)
-    -- it is recommened to put impatient.nvim before any other plugins
-    use {'lewis6991/impatient.nvim', config = [[require('impatient')]]}
+    -- it is recommended to put impatient.nvim before any other plugins
+    use { "lewis6991/impatient.nvim", config = [[require('impatient')]] }
 
-    use({"wbthomason/packer.nvim", opt = true})
+    use { "wbthomason/packer.nvim", opt = true }
 
-    use({"onsails/lspkind-nvim", event = "VimEnter"})
+    use { "onsails/lspkind-nvim", event = "VimEnter" }
     -- auto-completion engine
-    use {"hrsh7th/nvim-cmp", after = "lspkind-nvim", config = [[require('config.nvim-cmp')]]}
+    use { "hrsh7th/nvim-cmp", after = "lspkind-nvim", config = [[require('config.nvim-cmp')]] }
 
     -- nvim-cmp completion sources
-    use {"hrsh7th/cmp-nvim-lsp", after = "nvim-cmp"}
-    -- use {"hrsh7th/cmp-nvim-lua", after = "nvim-cmp"}
-    use {"hrsh7th/cmp-path", after = "nvim-cmp"}
-    use {"hrsh7th/cmp-buffer", after = "nvim-cmp"}
+    use { "hrsh7th/cmp-nvim-lsp", after = "nvim-cmp" }
+    use { "hrsh7th/cmp-path", after = "nvim-cmp" }
+    use { "hrsh7th/cmp-buffer", after = "nvim-cmp" }
     use { "hrsh7th/cmp-omni", after = "nvim-cmp" }
-
-    -- use {"hrsh7th/cmp-cmdline", after = "nvim-cmp"}
-    use {"quangnguyen30192/cmp-nvim-ultisnips", after = {'nvim-cmp', 'ultisnips'}}
+    use { "quangnguyen30192/cmp-nvim-ultisnips", after = { "nvim-cmp", "ultisnips" } }
     if vim.g.is_mac then
-      use {"hrsh7th/cmp-emoji", after = 'nvim-cmp'}
+      use { "hrsh7th/cmp-emoji", after = "nvim-cmp" }
     end
 
     -- nvim-lsp configuration (it relies on cmp-nvim-lsp, so it should be loaded after cmp-nvim-lsp).
-    use({ "neovim/nvim-lspconfig", after = "cmp-nvim-lsp", config = [[require('config.lsp')]] })
+    use { "neovim/nvim-lspconfig", after = "cmp-nvim-lsp", config = [[require('config.lsp')]] }
 
     if vim.g.is_mac then
-      use({ "nvim-treesitter/nvim-treesitter", event = 'BufEnter', run = ":TSUpdate", config = [[require('config.treesitter')]] })
+      use {
+        "nvim-treesitter/nvim-treesitter",
+        event = "BufEnter",
+        run = ":TSUpdate",
+        config = [[require('config.treesitter')]],
+      }
     end
 
     -- Python indent (follows the PEP8 style)
-    use({ "Vimjas/vim-python-pep8-indent", ft = { "python" } })
+    use { "Vimjas/vim-python-pep8-indent", ft = { "python" } }
 
     -- Python-related text object
-    use({ "jeetsukumaran/vim-pythonsense", ft = { "python" } })
+    use { "jeetsukumaran/vim-pythonsense", ft = { "python" } }
 
-    use({"machakann/vim-swap", event = "VimEnter"})
+    use { "machakann/vim-swap", event = "VimEnter" }
 
     -- IDE for Lisp
     if utils.executable("sbcl") then
       -- use 'kovisoft/slimv'
-      use({ "vlime/vlime", rtp = "vim/", ft = { "lisp" } })
+      use { "vlime/vlime", rtp = "vim/", ft = { "lisp" } }
     end
 
     -- Super fast buffer jump
     use {
-      'phaazon/hop.nvim',
+      "phaazon/hop.nvim",
       event = "VimEnter",
       config = function()
-        vim.defer_fn(function() require('config.nvim_hop') end, 2000)
-      end
+        vim.defer_fn(function()
+          require("config.nvim_hop")
+        end, 2000)
+      end,
     }
 
-    -- Clear highlight search automatically for you
-    -- use({"romainl/vim-cool", event = "VimEnter"})
-
     -- Show match number and index for searching
     use {
-      'kevinhwang91/nvim-hlslens',
-      branch = 'main',
-      keys = {{'n', '*'}, {'n', '#'}, {'n', 'n'}, {'n', 'N'}},
-      config = [[require('config.hlslens')]]
+      "kevinhwang91/nvim-hlslens",
+      branch = "main",
+      keys = { { "n", "*" }, { "n", "#" }, { "n", "n" }, { "n", "N" } },
+      config = [[require('config.hlslens')]],
     }
 
     -- Stay after pressing * and search selected text
-    use({"haya14busa/vim-asterisk", event = 'VimEnter'})
+    use { "haya14busa/vim-asterisk", event = "VimEnter" }
 
     -- File search, tag search and more
     if vim.g.is_win then
-      use({"Yggdroot/LeaderF", cmd = "Leaderf"})
+      use { "Yggdroot/LeaderF", cmd = "Leaderf" }
     else
-      use({ "Yggdroot/LeaderF", cmd = "Leaderf", run = ":LeaderfInstallCExtension" })
+      use { "Yggdroot/LeaderF", cmd = "Leaderf", run = ":LeaderfInstallCExtension" }
     end
 
     use {
-      'nvim-telescope/telescope.nvim', cmd = 'Telescope',
-      requires = { {'nvim-lua/plenary.nvim'} }
+      "nvim-telescope/telescope.nvim",
+      cmd = "Telescope",
+      requires = { { "nvim-lua/plenary.nvim" } },
     }
     -- search emoji and other symbols
-    use {'nvim-telescope/telescope-symbols.nvim', after = 'telescope.nvim'}
-
-    -- Another similar plugin is command-t
-    -- use 'wincent/command-t'
-
-    -- Another grep tool (similar to Sublime Text Ctrl+Shift+F)
-    -- use 'dyng/ctrlsf.vim'
-
-    -- A grepping tool
-    -- use {'mhinz/vim-grepper', cmd = {'Grepper', '<plug>(GrepperOperator)'}}
+    use { "nvim-telescope/telescope-symbols.nvim", after = "telescope.nvim" }
 
     -- A list of colorscheme plugin you may want to try. Find what suits you.
-    use({"lifepillar/vim-gruvbox8", opt = true})
-    use({"navarasu/onedark.nvim", opt = true})
-    use({"sainnhe/edge", opt = true})
-    use({"sainnhe/sonokai", opt = true})
-    use({"sainnhe/gruvbox-material", opt = true})
-    use({"shaunsingh/nord.nvim", opt = true})
-    use({"NTBBloodbath/doom-one.nvim", opt = true})
-    use({"sainnhe/everforest", opt = true})
-    use({"EdenEast/nightfox.nvim", opt = true})
-    use({"rebelot/kanagawa.nvim", opt = true})
-    use({"catppuccin/nvim", as = "catppuccin", opt = true})
+    use { "lifepillar/vim-gruvbox8", opt = true }
+    use { "navarasu/onedark.nvim", opt = true }
+    use { "sainnhe/edge", opt = true }
+    use { "sainnhe/sonokai", opt = true }
+    use { "sainnhe/gruvbox-material", opt = true }
+    use { "shaunsingh/nord.nvim", opt = true }
+    use { "NTBBloodbath/doom-one.nvim", opt = true }
+    use { "sainnhe/everforest", opt = true }
+    use { "EdenEast/nightfox.nvim", opt = true }
+    use { "rebelot/kanagawa.nvim", opt = true }
+    use { "catppuccin/nvim", as = "catppuccin", opt = true }
 
-    -- Show git change (change, delete, add) signs in vim sign column
-    use({"mhinz/vim-signify", event = 'BufEnter'})
-    -- Another similar plugin
-    -- use 'airblade/vim-gitgutter'
-
-    use {'kyazdani42/nvim-web-devicons', event = 'VimEnter'}
+    use { "kyazdani42/nvim-web-devicons", event = "VimEnter" }
 
     use {
-      'nvim-lualine/lualine.nvim',
-      event = 'VimEnter',
-      config = [[require('config.statusline')]]
+      "nvim-lualine/lualine.nvim",
+      event = "VimEnter",
+      config = [[require('config.statusline')]],
     }
 
-    use({ "akinsho/bufferline.nvim", event = "VimEnter", config = [[require('config.bufferline')]] })
+    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({
+    use {
       "lukas-reineke/indent-blankline.nvim",
-      event = 'VimEnter',
-      config = [[require('config.indent-blankline')]]
-    })
+      event = "VimEnter",
+      config = [[require('config.indent-blankline')]],
+    }
 
     -- Highlight URLs inside vim
-    use({"itchyny/vim-highlighturl", event = "VimEnter"})
+    use { "itchyny/vim-highlighturl", event = "VimEnter" }
 
     -- notification plugin
-    use({
+    use {
       "rcarriga/nvim-notify",
       event = "BufEnter",
       config = function()
-        vim.defer_fn(function() require('config.nvim-notify') end, 2000)
-      end
-    })
+        vim.defer_fn(function()
+          require("config.nvim-notify")
+        end, 2000)
+      end,
+    }
 
     -- For Windows and Mac, we can open an URL in the browser. For Linux, it may
     -- not be possible since we maybe in a server which disables GUI.
     if vim.g.is_win or vim.g.is_mac then
       -- open URL in browser
-      use({"tyru/open-browser.vim", event = "VimEnter"})
+      use { "tyru/open-browser.vim", event = "VimEnter" }
     end
 
     -- Only install these plugins if ctags are installed on the system
     if utils.executable("ctags") then
       -- show file tags in vim window
-      use({"liuchengxu/vista.vim", cmd = "Vista"})
+      use { "liuchengxu/vista.vim", cmd = "Vista" }
     end
 
     -- Snippet engine and snippet template
-    use({"SirVer/ultisnips", event = 'InsertEnter'})
-    use({ "honza/vim-snippets", after = 'ultisnips'})
+    use { "SirVer/ultisnips", event = "InsertEnter" }
+    use { "honza/vim-snippets", after = "ultisnips" }
 
     -- Automatic insertion and deletion of a pair of characters
-    use({"Raimondi/delimitMate", event = "InsertEnter"})
+    use { "Raimondi/delimitMate", event = "InsertEnter" }
 
     -- Comment plugin
-    use({"tpope/vim-commentary", event = "VimEnter"})
+    use { "tpope/vim-commentary", event = "VimEnter" }
 
     -- Multiple cursor plugin like Sublime Text?
     -- use 'mg979/vim-visual-multi'
 
     -- Autosave files on certain events
-    use({"907th/vim-auto-save", event = "InsertEnter"})
+    use { "907th/vim-auto-save", event = "InsertEnter" }
 
     -- Show undo history visually
-    use({"simnalamburt/vim-mundo", cmd = {"MundoToggle", "MundoShow"}})
+    use { "simnalamburt/vim-mundo", cmd = { "MundoToggle", "MundoShow" } }
 
     -- Manage your yank history
     if vim.g.is_win or vim.g.is_mac then
-      use({"svermeulen/vim-yoink", event = "VimEnter"})
+      use { "svermeulen/vim-yoink", event = "VimEnter" }
     end
 
     -- Handy unix command inside Vim (Rename, Move etc.)
-    use({"tpope/vim-eunuch", cmd = {"Rename", "Delete"}})
+    use { "tpope/vim-eunuch", cmd = { "Rename", "Delete" } }
 
     -- Repeat vim motions
-    use({"tpope/vim-repeat", event = "VimEnter"})
+    use { "tpope/vim-repeat", event = "VimEnter" }
 
-    -- Show the content of register in preview window
-    -- Plug 'junegunn/vim-peekaboo'
-    use({ "jdhao/better-escape.vim", event = { "InsertEnter" } })
+    use { "nvim-zh/better-escape.vim", event = { "InsertEnter" } }
 
     if vim.g.is_mac then
-      use({ "lyokha/vim-xkbswitch", event = { "InsertEnter" } })
+      use { "lyokha/vim-xkbswitch", event = { "InsertEnter" } }
     elseif vim.g.is_win then
-      use({ "Neur1n/neuims", event = { "InsertEnter" } })
+      use { "Neur1n/neuims", event = { "InsertEnter" } }
     end
 
-    -- Syntax check and make
-    -- use 'neomake/neomake'
-
     -- Auto format tools
-    use({ "sbdchd/neoformat", cmd = { "Neoformat" } })
-    -- use 'Chiel92/vim-autoformat'
+    use { "sbdchd/neoformat", cmd = { "Neoformat" } }
 
     -- Git command inside vim
-    use({ "tpope/vim-fugitive", event = "User InGitRepo" })
+    use { "tpope/vim-fugitive", event = "User InGitRepo", config = [[require('config.fugitive')]] }
 
     -- Better git log display
-    use({ "rbong/vim-flog", requires = "tpope/vim-fugitive", cmd = { "Flog" } })
+    use { "rbong/vim-flog", requires = "tpope/vim-fugitive", cmd = { "Flog" } }
 
-    use({ "christoomey/vim-conflicted", requires = "tpope/vim-fugitive", cmd = {"Conflicted"}})
+    use { "christoomey/vim-conflicted", requires = "tpope/vim-fugitive", cmd = { "Conflicted" } }
 
-    use({ "kevinhwang91/nvim-bqf", ft = "qf", config = [[require('config.bqf')]] })
+    use {
+      "ruifm/gitlinker.nvim",
+      requires = "nvim-lua/plenary.nvim",
+      event = "User InGitRepo",
+      config = [[require('config.git-linker')]],
+    }
+
+    -- Show git change (change, delete, add) signs in vim sign column
+    use { "lewis6991/gitsigns.nvim", config = [[require('config.gitsigns')]] }
 
     -- Better git commit experience
-    use({"rhysd/committia.vim", opt = true, setup = [[vim.cmd('packadd committia.vim')]]})
+    use { "rhysd/committia.vim", opt = true, setup = [[vim.cmd('packadd committia.vim')]] }
+
+    use { "kevinhwang91/nvim-bqf", ft = "qf", config = [[require('config.bqf')]] }
 
     -- Another markdown plugin
-    use({ "plasticboy/vim-markdown", ft = { "markdown" } })
+    use { "plasticboy/vim-markdown", ft = { "markdown" } }
 
     -- Faster footnote generation
-    use({ "vim-pandoc/vim-markdownfootnotes", ft = { "markdown" } })
+    use { "vim-pandoc/vim-markdownfootnotes", ft = { "markdown" } }
 
     -- Vim tabular plugin for manipulate tabular, required by markdown plugins
-    use({ "godlygeek/tabular", cmd = { "Tabularize" } })
+    use { "godlygeek/tabular", cmd = { "Tabularize" } }
 
     -- Markdown JSON header highlight plugin
-    use({ "elzr/vim-json", ft = { "json", "markdown" } })
+    use { "elzr/vim-json", ft = { "json", "markdown" } }
 
     -- Markdown previewing (only for Mac and Windows)
     if vim.g.is_win or vim.g.is_mac then
-      use({
+      use {
         "iamcco/markdown-preview.nvim",
         run = function()
           fn["mkdp#util#install"]()
         end,
         ft = { "markdown" },
-      })
+      }
     end
 
-    use({'folke/zen-mode.nvim', cmd = 'ZenMode', config = [[require('config.zen-mode')]]})
+    use { "folke/zen-mode.nvim", cmd = "ZenMode", config = [[require('config.zen-mode')]] }
 
     if vim.g.is_mac then
-      use({ "rhysd/vim-grammarous", ft = { "markdown" } })
+      use { "rhysd/vim-grammarous", ft = { "markdown" } }
     end
 
-    use({"chrisbra/unicode.vim", event = "VimEnter"})
+    use { "chrisbra/unicode.vim", event = "VimEnter" }
 
     -- Additional powerful text object for vim, this plugin should be studied
     -- carefully to use its full power
-    use({"wellle/targets.vim", event = "VimEnter"})
+    use { "wellle/targets.vim", event = "VimEnter" }
 
     -- Plugin to manipulate character pairs quickly
-    -- use 'tpope/vim-surround'
-    use({"machakann/vim-sandwich", event = "VimEnter"})
+    use { "machakann/vim-sandwich", event = "VimEnter" }
 
     -- Add indent object for vim (useful for languages like Python)
-    use({"michaeljsmith/vim-indent-object", event = "VimEnter"})
+    use { "michaeljsmith/vim-indent-object", event = "VimEnter" }
 
     -- Only use these plugin on Windows and Mac and when LaTeX is installed
     if vim.g.is_win or vim.g.is_mac and utils.executable("latex") then
-      use({ "lervag/vimtex", ft = { "tex" } })
-
-      -- use {'matze/vim-tex-fold', ft = {'tex', }}
-      -- use 'Konfekt/FastFold'
+      use { "lervag/vimtex", ft = { "tex" } }
     end
 
     -- Since tmux is only available on Linux and Mac, we only enable these plugins
     -- for Linux and Mac
     if utils.executable("tmux") then
       -- .tmux.conf syntax highlighting and setting check
-      use({ "tmux-plugins/vim-tmux", ft = { "tmux" } })
+      use { "tmux-plugins/vim-tmux", ft = { "tmux" } }
     end
 
     -- Modern matchit implementation
-    use({"andymass/vim-matchup", event = "VimEnter"})
+    use { "andymass/vim-matchup", event = "VimEnter" }
 
     -- Smoothie motions
-    -- use 'psliwka/vim-smoothie'
-    use({
+    use {
       "karb94/neoscroll.nvim",
       event = "VimEnter",
       config = function()
-        vim.defer_fn(function() require('config.neoscroll') end, 2000)
-      end
-    })
+        vim.defer_fn(function()
+          require("config.neoscroll")
+        end, 2000)
+      end,
+    }
 
-    use({"tpope/vim-scriptease", cmd = {"Scriptnames", "Message", "Verbose"}})
+    use { "tpope/vim-scriptease", cmd = { "Scriptnames", "Message", "Verbose" } }
 
     -- Asynchronous command execution
-    use({ "skywind3000/asyncrun.vim", opt = true, cmd = { "AsyncRun" } })
-    -- Another asynchronous plugin
-    -- Plug 'tpope/vim-dispatch'
+    use { "skywind3000/asyncrun.vim", opt = true, cmd = { "AsyncRun" } }
 
-    use({ "cespare/vim-toml", ft = { "toml" }, branch = "main" })
+    use { "cespare/vim-toml", ft = { "toml" }, branch = "main" }
 
     -- Edit text area in browser using nvim
     if vim.g.is_win or vim.g.is_mac then
-      use({
+      use {
         "glacambre/firenvim",
-        run = function() fn["firenvim#install"](0) end,
+        run = function()
+          fn["firenvim#install"](0)
+        end,
         opt = true,
         setup = [[vim.cmd('packadd firenvim')]],
-      })
+      }
     end
 
     -- Debugger plugin
     if vim.g.is_win or vim.g.is_linux then
-      use({ "sakhnik/nvim-gdb", run = { "bash install.sh" }, opt = true, setup = [[vim.cmd('packadd nvim-gdb')]] })
+      use { "sakhnik/nvim-gdb", run = { "bash install.sh" }, opt = true, setup = [[vim.cmd('packadd nvim-gdb')]] }
     end
 
     -- Session management plugin
-    use({"tpope/vim-obsession", cmd = 'Obsession'})
+    use { "tpope/vim-obsession", cmd = "Obsession" }
 
     if vim.g.is_linux then
-      use({"ojroques/vim-oscyank", cmd = {'OSCYank', 'OSCYankReg'}})
+      use { "ojroques/vim-oscyank", cmd = { "OSCYank", "OSCYankReg" } }
     end
 
     -- The missing auto-completion for cmdline!
-    use({"gelguy/wilder.nvim", opt = true, setup = [[vim.cmd('packadd wilder.nvim')]]})
+    use { "gelguy/wilder.nvim", opt = true, setup = [[vim.cmd('packadd wilder.nvim')]] }
 
     -- showing keybindings
-    use {"folke/which-key.nvim",
-    event = "VimEnter",
-    config = function()
-      vim.defer_fn(function() require('config.which-key') end, 2000)
-    end
+    use {
+      "folke/which-key.nvim",
+      event = "VimEnter",
+      config = function()
+        vim.defer_fn(function()
+          require("config.which-key")
+        end, 2000)
+      end,
     }
 
     -- show and trim trailing whitespaces
-    use {'jdhao/whitespace.nvim', event = 'VimEnter'}
+    use { "jdhao/whitespace.nvim", event = "VimEnter" }
 
     -- file explorer
     use {
-      'kyazdani42/nvim-tree.lua',
-      requires = { 'kyazdani42/nvim-web-devicons' },
-      config = [[require('config.nvim-tree')]]
+      "kyazdani42/nvim-tree.lua",
+      requires = { "kyazdani42/nvim-web-devicons" },
+      config = [[require('config.nvim-tree')]],
     }
 
-    use { 'ii14/emmylua-nvim', ft = 'lua' }
+    use { "ii14/emmylua-nvim", ft = "lua" }
+
+    use { "j-hui/fidget.nvim", after = "nvim-lspconfig", config = [[require('config.fidget-nvim')]] }
   end,
   config = {
     max_jobs = 16,
-    compile_path = packer_util.join_paths(fn.stdpath('data'), 'site', 'lua', 'packer_compiled.lua'),
+    compile_path = packer_util.join_paths(fn.stdpath("data"), "site", "lua", "packer_compiled.lua"),
   },
-})
+}
 
-local status, _ = pcall(require, 'packer_compiled')
-if not status then
-  vim.notify("Error requiring packer_compiled.lua: run PackerSync to fix!")
+-- For fresh install, we need to install plugins. Otherwise, we just need to require `packer_compiled.lua`.
+if fresh_install then
+  -- We run packer.sync() here, because only after packer.startup, can we know which plugins to install.
+  -- So plugin installation should be done after the startup process.
+  packer.sync()
+else
+  local status, _ = pcall(require, "packer_compiled")
+  if not status then
+    local msg = "File packer_compiled.lua not found: run PackerSync to fix!"
+    vim.notify(msg, vim.log.levels.ERROR, { title = "nvim-config" })
+  end
 end

lua/utils.lua

@@ -1,10 +1,5 @@
 local fn = vim.fn
 
--- inspect something
-function inspect(item)
-  vim.pretty_print(item)
-end
-
 local M = {}
 
 function M.executable(name)
@@ -15,14 +10,57 @@ function M.executable(name)
   return false
 end
 
-function M.may_create_dir()
-  local fpath = fn.expand('<afile>')
-  local parent_dir = fn.fnamemodify(fpath, ":p:h")
-  local res = fn.isdirectory(parent_dir)
+--- check whether a feature exists in Nvim
+--- @feat: string
+---   the feature name, like `nvim-0.7` or `unix`.
+--- return: bool
+M.has = function(feat)
+  if fn.has(feat) == 1 then
+    return true
+  end
+
+  return false
+end
+
+--- Create a dir if it does not exist
+function M.may_create_dir(dir)
+  local res = fn.isdirectory(dir)
 
   if res == 0 then
-    fn.mkdir(parent_dir, 'p')
+    fn.mkdir(dir, "p")
   end
 end
 
+function M.get_nvim_version()
+  local actual_ver = vim.version()
+
+  local nvim_ver_str = string.format("%d.%d.%d", actual_ver.major, actual_ver.minor, actual_ver.patch)
+  return nvim_ver_str
+end
+
+--- Generate random integers in the range [Low, High], inclusive,
+--- adapted from https://stackoverflow.com/a/12739441/6064933
+--- @low: the lower value for this range
+--- @high: the upper value for this range
+function M.rand_int(low, high)
+  -- Use lua to generate random int, see also: https://stackoverflow.com/a/20157671/6064933
+  math.randomseed(os.time())
+
+  return math.random(low, high)
+end
+
+--- Select a random element from a sequence/list.
+--- @seq: the sequence to choose an element
+function M.rand_element(seq)
+  local idx = M.rand_int(1, #seq)
+
+  return seq[idx]
+end
+
+function M.add_pack(name)
+  local status, error = pcall(vim.cmd, "packadd " .. name)
+
+  return status
+end
+
 return M

my_snippets/markdown.snippets

@@ -47,7 +47,7 @@ $0
 endsnippet
 
 snippet font "HTML font tag"
-<font color="${1:red}">${2:TEXT}</font>
+<font color="${1:blue}">${2:TEXT}</font>
 endsnippet
 
 snippet link "Markdown links"

my_snippets/tex.snippets

@@ -2,7 +2,7 @@ snippet use "usepackage" b
 \usepackage{${1:package}}
 endsnippet
 
-snippet eqa "equation enviroment" b
+snippet eqa "equation environment" b
 \begin{equation}\label{$1}
 	$2
 \end{equation}

spell/en.utf-8.add

@@ -430,3 +430,13 @@ metatable
 open3d
 pyntcloud
 param
+reddit
+viml
+PostgreSQL
+CNY
+wechat
+ziroom
+Postgres
+plpgsql
+postgres
+PySpark