update which-key conf and some mappings

delimitMate is not updated for a long time.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -8,7 +8,7 @@ assignees: ''
 
 <!-- Before reporting: make sure that you have read the doc (https://github.com/jdhao/nvim-config/tree/master/docs) and searched existing issues. -->
 
-- `nvim --version`:
+- `nvim --version`: <!--should be latest stable version: https://github.com/neovim/neovim/releases/tag/stable -->
 - terminal emulator and version:
 - Operating system/version:
 - Have you read and followed all steps in the [doc](https://github.com/jdhao/nvim-config/tree/master/docs):

.gitignore

@@ -2,6 +2,5 @@ tags
 en.utf-8.add.spl
 *.exe
 .netrwhist
-packer_compiled.lua
 *.log
 .DS_Store

.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"

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018-2022 jdhao
+Copyright (c) 2018-2023 jdhao
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -9,24 +9,27 @@
     <a>
       <img alt="Windows" src="https://img.shields.io/badge/Windows-%23.svg?style=flat-square&logo=windows&color=0078D6&logoColor=white" />
     </a>
-    <a href="https://github.com/jdhao/nvim-config/commits">
-      <img src="https://badgen.net/github/commits/jdhao/nvim-config" alt="Commit number" />
-    </a>
-    <a href="https://github.com/jdhao/nvim-config/network">
-      <img alt="Forks" src="https://badgen.net/github/forks/jdhao/nvim-config">
-    </a>
-    <a href="https://github.com/jdhao/nvim-config/stargazers">
-      <img alt="Stars" src="https://badgen.net/github/stars/jdhao/nvim-config">
-    </a>
     <a href="https://github.com/jdhao/nvim-config/releases/latest">
       <img alt="Latest release" src="https://img.shields.io/github/v/release/jdhao/nvim-config" />
     </a>
     <a href="https://github.com/neovim/neovim/releases/tag/stable">
-      <img src="https://img.shields.io/badge/Neovim-0.7.0-blueviolet.svg?style=flat-square&logo=Neovim&logoColor=green" alt="Neovim minimum version"/>
+      <img src="https://img.shields.io/badge/Neovim-0.9.5-blueviolet.svg?style=flat-square&logo=Neovim&logoColor=green" alt="Neovim minimum version"/>
     </a>
     <a href="https://github.com/jdhao/nvim-config/search?l=vim-script">
       <img src="https://img.shields.io/github/languages/top/jdhao/nvim-config" alt="Top languages"/>
     </a>
+    <a href="https://github.com/jdhao/nvim-config/graphs/commit-activity">
+      <img src="https://img.shields.io/github/commit-activity/m/jdhao/nvim-config?style=flat-square" />
+    </a>
+    <a href="https://github.com/jdhao/nvim-config/releases/tag/v0.9.5">
+      <img src="https://img.shields.io/github/commits-since/jdhao/nvim-config/v0.9.5?style=flat-square" />
+    </a>
+    <a href="https://github.com/jdhao/nvim-config/graphs/contributors">
+      <img src="https://img.shields.io/github/contributors/jdhao/nvim-config?style=flat-square" />
+    </a>
+    <a>
+      <img src="https://img.shields.io/github/repo-size/jdhao/nvim-config?style=flat-square" />
+    </a>
     <a href="https://github.com/jdhao/nvim-config/blob/master/LICENSE">
       <img src="https://img.shields.io/github/license/jdhao/nvim-config?style=flat-square&logo=GNU&label=License" alt="License"/>
     </a>
@@ -36,67 +39,67 @@
 # 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.
-While you can download the whole repository and use it, it is not recommended though.
+While you can clone the whole repository and use it, it is not recommended though.
 Good configurations are personal. Everyone should have his or her unique config file.
-You are encouraged to copy from this repo the part you feel useful and add it to your own Nvim config.
+You are encouraged to copy from this repo the part you want and add it to your own config.
+
+To reduce the possibility of breakage, **this config is only maintained for [the latest nvim stable release](https://github.com/neovim/neovim/releases/tag/stable).
+No effort is spent on maintaining backward compatibility.**
 
 # Install and setup
 
 See [doc here](docs/README.md) on how to install Nvim's dependencies, Nvim itself,
 and how to set up on different platforms (Linux, macOS, and Windows).
 
-**This config is tested against [Nvim v0.7.0 release](https://github.com/neovim/neovim/releases/tag/stable).
-No backward compatibility is guaranteed.**
-
 # Features #
 
-+ Plugin management via [Packer.nvim](https://github.com/wbthomason/packer.nvim).
-+ Code auto-completion via [nvim-cmp](https://github.com/hrsh7th/nvim-cmp) and [nvim-lspconfig](https://github.com/neovim/nvim-lspconfig).
++ Plugin management via [Lazy.nvim](https://github.com/folke/lazy.nvim).
++ Code, snippet, word auto-completion via [nvim-cmp](https://github.com/hrsh7th/nvim-cmp).
++ Language server protocol (LSP) support via [nvim-lspconfig](https://github.com/neovim/nvim-lspconfig).
 + Git integration via [vim-fugitive](https://github.com/tpope/vim-fugitive).
-+ Better escaping from insert mode via [better-escape.vim](https://github.com/jdhao/better-escape.vim).
++ Better escaping from insert mode via [better-escape.vim](https://github.com/nvim-zh/better-escape.vim).
 + Ultra-fast project-wide fuzzy searching via [LeaderF](https://github.com/Yggdroot/LeaderF).
 + Faster code commenting via [vim-commentary](https://github.com/tpope/vim-commentary).
-+ Faster matching pair insertion and jump via [delimitMate](https://github.com/Raimondi/delimitMate).
++ Faster matching pair insertion and jump via [nvim-autopairs](https://github.com/windwp/nvim-autopairs).
 + Smarter and faster matching pair management (add, replace or delete) via [vim-sandwich](https://github.com/machakann/vim-sandwich).
 + Fast buffer jump via [hop.nvim](https://github.com/phaazon/hop.nvim).
-+ Ultra fast snippet insertion via [Ultisnips](https://github.com/SirVer/ultisnips).
-+ Beautiful status line via [lualine.nvim](https://github.com/nvim-lualine/lualine.nvim).
-+ File tree explorer via [nvim-tree.lua](https://github.com/kyazdani42/nvim-tree.lua).
++ Powerful snippet insertion via [Ultisnips](https://github.com/SirVer/ultisnips).
++ Beautiful statusline via [lualine.nvim](https://github.com/nvim-lualine/lualine.nvim).
++ File tree explorer via [nvim-tree.lua](https://github.com/nvim-tree/nvim-tree.lua).
 + Better quickfix list with [nvim-bqf](https://github.com/kevinhwang91/nvim-bqf).
 + Show search index and count with [nvim-hlslens](https://github.com/kevinhwang91/nvim-hlslens).
 + Command line auto-completion via [wilder.nvim](https://github.com/gelguy/wilder.nvim).
-+ Keymap display via [which-key.nvim](https://github.com/folke/which-key.nvim).
++ User-defined mapping hint via [which-key.nvim](https://github.com/folke/which-key.nvim).
 + 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.
-+ Markdown writing and previewing via [vim-markdown](https://github.com/plasticboy/vim-markdown) and [markdown-preview.nvim](https://github.com/iamcco/markdown-preview.nvim).
++ 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/preservim/vim-markdown) and [markdown-preview.nvim](https://github.com/iamcco/markdown-preview.nvim).
++ LaTeX editing and previewing via [vimtex](https://github.com/lervag/vimtex)
 + Animated GUI style notification via [nvim-notify](https://github.com/rcarriga/nvim-notify).
-+ Smooth scroll experience via [neoscroll](https://github.com/karb94/neoscroll.nvim).
 + Tags navigation via [vista](https://github.com/liuchengxu/vista.vim).
 + Code formatting via [Neoformat](https://github.com/sbdchd/neoformat).
 + Undo management via [vim-mundo](https://github.com/simnalamburt/vim-mundo)
-+ LaTeX editing via [vimtex](https://github.com/lervag/vimtex) <sup id="a1">[1](#f1)</sup>.
 + ......
 
 # UI Demo
 
-For more UI demos, see [here](https://github.com/jdhao/nvim-config/issues/15).
+For more UI demos, check [here](https://github.com/jdhao/nvim-config/issues/15).
 
-## Start screen with alpha-nvim
+## Start screen with dashboard-nvim
 
 <p align="center">
-<img src="https://user-images.githubusercontent.com/16662357/139459989-0537ded4-c119-4749-99bf-b551ca1ba118.jpg" width="800">
+<img src="https://user-images.githubusercontent.com/16662357/183256752-fb23b215-a6b8-4646-beed-9999f52d53f1.png" width="800">
 </p>
 
-## fuzzy finding using LeaderF
+## File fuzzy finding using LeaderF
 
 <p align="center">
-<img src="https://user-images.githubusercontent.com/16662357/139462025-7bce98c5-d2d5-413f-9659-20545865cdca.gif" width="800">
+<img src="https://user-images.githubusercontent.com/16662357/183257017-2d9d7605-3c4b-4e1d-8955-30998f9b6f28.gif" width="800">
 </p>
 
 ## Code autocompletion with nvim-cmp
@@ -139,45 +142,50 @@ Go to a string starting with `se`
 
 # Shortcuts
 
-Some of the shortcuts I use frequently is listed here. In the following shortcuts, `<leader>` represents ASCII character `,`.
+Some of the shortcuts I use frequently are listed here. In the following shortcuts, `<leader>` represents ASCII character `,`.
 
-| Shortcut          | Mode          | platform        | Description                                                      |
-|-------------------|---------------|-----------------|------------------------------------------------------------------|
-| `<leader>ff`      | Normal        | Linux/macOS/Win | Fuzzy file searching in a floating window                        |
-| `<leader>fh`      | Normal        | Linux/macOS/Win | Fuzzy help file grepping in a floating window                    |
-| `<leader>fg`      | Normal        | Linux/macOS/Win | Fuzzy project-wide grepping in a floating window                 |
-| `<leader>ft`      | Normal        | Linux/macOS/Win | Fuzzy buffer tag searching in a floating window                  |
-| `<leader>fb`      | Normal        | Linux/macOS/Win | Fuzzy buffer switching in a floating window                      |
-| `<leader><Space>` | Normal        | Linux/macOS/Win | Remove trailing white spaces                                     |
-| `<leader>v`       | Normal        | Linux/macOS/Win | Reselect last pasted text                                        |
-| `<leader>ev`      | Normal        | Linux/macOS/Win | Edit Nvim config in a new tabpage                                |
-| `<leader>sv`      | Normal        | Linux/macOS/Win | Reload Nvim config                                               |
-| `<leader>st`      | Normal        | Linux/macOS/Win | Show highlight group for cursor text                             |
-| `<leader>q`       | Normal        | Linux/macOS/Win | Quit current window                                              |
-| `<leader>Q`       | Normal        | Linux/macOS/Win | Quit all window and close Nvim                                   |
-| `<leader>w`       | Normal        | Linux/macOS/Win | Save current buffer content                                      |
-| `<leader>y`       | Normal        | Linux/macOS/Win | Copy the content of entire buffer to default register            |
-| `<leader>cl`      | Normal        | Linux/macOS/Win | Toggle cursor column                                             |
-| `<leader>cd`      | Normal        | Linux/macOS/Win | Change current working directory to to the dir of current buffer |
-| `<space>t`        | Normal        | Linux/macOS/Win | Toggle tag window (show project tags in the right window)        |
-| `<leader>gs`      | Normal        | Linux/macOS/Win | Show Git status result                                           |
-| `<leader>gw`      | Normal        | Linux/macOS/Win | Run Git add for current file                                     |
-| `<leader>gd`      | Normal        | Linux/macOS/Win | Run git diff for current file                                    |
-| `<leader>gc`      | Normal        | Linux/macOS/Win | Run git commit                                                   |
-| `<leader>gpl`     | Normal        | Linux/macOS/Win | Run git pull                                                     |
-| `<leader>gpu`     | Normal        | Linux/macOS/Win | Run git push                                                     |
-| `<F9>`            | Normal        | Linux/macOS/Win | Run current source file (for Python, C++)                        |
-| `<F11>`           | Normal        | Linux/macOS/Win | Toggle spell checking                                            |
-| `<F12>`           | Normal        | Linux/macOS/Win | Toggle paste mode                                                |
-| `\x`              | Normal        | Linux/macOS/Win | Close location or quickfix window                                |
-| `\d`              | Normal        | Linux/macOS/Win | Close current buffer and go to previous buffer                   |
-| `{count}gb`       | Normal        | Linux/macOS/Win | Go to buffer {count}  or next buffer in the buffer list.         |
-| `Alt-m`           | Normal        | macOS/Win       | Markdown previewing in system browser                            |
-| `Alt-Shift-m`     | Normal        | macOS/Win       | Stopping Markdown previewing in system browser                   |
-| `ob`              | Normal/Visual | macOS/Win       | Open link under cursor or search visual selection                |
-| `ctrl-u`          | Insert        | Linux/macOS/Win | Turn word under cursor to upper case                             |
-| `ctrl-t`          | Insert        | Linux/macOS/Win | Turn word under cursor to title case                             |
-| `jk`              | Insert        | Linux/macOS/Win | Return to Normal mode without lagging                            |
+| Shortcut          | Mode          | platform        | Description                                                              |
+|-------------------|---------------|-----------------|--------------------------------------------------------------------------|
+| `<leader>ff`      | Normal        | Linux/macOS/Win | Fuzzy file searching in a floating window                                |
+| `<leader>fh`      | Normal        | Linux/macOS/Win | Fuzzy help file grepping in a floating window                            |
+| `<leader>fg`      | Normal        | Linux/macOS/Win | Fuzzy project-wide grepping in a floating window                         |
+| `<leader>ft`      | Normal        | Linux/macOS/Win | Fuzzy buffer tag searching in a floating window                          |
+| `<leader>fb`      | Normal        | Linux/macOS/Win | Fuzzy buffer switching in a floating window                              |
+| `<leader><Space>` | Normal        | Linux/macOS/Win | Remove trailing white spaces                                             |
+| `<leader>v`       | Normal        | Linux/macOS/Win | Reselect last pasted text                                                |
+| `<leader>ev`      | Normal        | Linux/macOS/Win | Edit Nvim config in a new tabpage                                        |
+| `<leader>sv`      | Normal        | Linux/macOS/Win | Reload Nvim config                                                       |
+| `<leader>st`      | Normal        | Linux/macOS/Win | Show highlight group for cursor text                                     |
+| `<leader>q`       | Normal        | Linux/macOS/Win | Quit current window                                                      |
+| `<leader>Q`       | Normal        | Linux/macOS/Win | Quit all window and close Nvim                                           |
+| `<leader>w`       | Normal        | Linux/macOS/Win | Save current buffer content                                              |
+| `<leader>y`       | Normal        | Linux/macOS/Win | Copy the content of entire buffer to default register                    |
+| `<leader>cl`      | Normal        | Linux/macOS/Win | Toggle cursor column                                                     |
+| `<leader>cd`      | Normal        | Linux/macOS/Win | Change current working directory to to the dir of current buffer         |
+| `<space>t`        | Normal        | Linux/macOS/Win | Toggle tag window (show project tags in the right window)                |
+| `<leader>gs`      | Normal        | Linux/macOS/Win | Show Git status result                                                   |
+| `<leader>gw`      | Normal        | Linux/macOS/Win | Run Git add for current file                                             |
+| `<leader>gd`      | Normal        | Linux/macOS/Win | Run git diff for current file                                            |
+| `<leader>gc`      | Normal        | Linux/macOS/Win | Run git commit                                                           |
+| `<leader>gpl`     | Normal        | Linux/macOS/Win | Run git pull                                                             |
+| `<leader>gpu`     | Normal        | Linux/macOS/Win | Run git push                                                             |
+| `<leader>gl`      | Normal/Visual | Linux/macOS/Win | Get perm link for current/visually-select lines
+| `<leader>gb`      | Normal        | macOS           | Browse current git repo in browser
+| `<F9>`            | Normal        | Linux/macOS/Win | Compile&run current source file (for C++, LaTeX, Lua, Python)            |
+| `<F11>`           | Normal        | Linux/macOS/Win | Toggle spell checking                                                    |
+| `<F12>`           | Normal        | Linux/macOS/Win | Toggle paste mode                                                        |
+| `\x`              | Normal        | Linux/macOS/Win | Close location or quickfix window                                        |
+| `\d`              | Normal        | Linux/macOS/Win | Close current buffer and go to previous buffer                           |
+| `{count}gb`       | Normal        | Linux/macOS/Win | Go to buffer `{count}` or next buffer in the buffer list.                |
+| `{operator}iB`    | Normal        | Linux/macOS/Win | Operate in the whole buffer, `{operator}` can be `v`, `y`, `c`, `d` etc. |
+| `Alt-k`           | Normal        | Linux/macOS/Win | Move current line or selected lines up                                   |
+| `Alt-j`           | Normal        | Linux/macOS/Win | Move current line or selected lines down                                 |
+| `Alt-m`           | Normal        | macOS/Win       | Markdown previewing in system browser                                    |
+| `Alt-Shift-m`     | Normal        | macOS/Win       | Stopping Markdown previewing in system browser                           |
+| `ob`              | Normal/Visual | macOS/Win       | Open link under cursor or search visual selection                        |
+| `ctrl-u`          | Insert        | Linux/macOS/Win | Turn word under cursor to upper case                                     |
+| `ctrl-t`          | Insert        | Linux/macOS/Win | Turn word under cursor to title case                                     |
+| `jk`              | Insert        | Linux/macOS/Win | Return to Normal mode without lagging                                    |
 
 # Custom commands
 
@@ -208,5 +216,3 @@ You may also be interested in my posts on configuring Nvim:
 + [Config nvim on Linux for Python development](https://jdhao.github.io/2018/12/24/centos_nvim_install_use_guide_en/)
 + [Nvim config on Windows 10](https://jdhao.github.io/2018/11/15/neovim_configuration_windows/)
 + [Nvim-qt config on Windows 10](https://jdhao.github.io/2019/01/17/nvim_qt_settings_on_windows/)
-
-<b id="f1">1:</b> Not enabled for Linux, you need to tweak [`lua/plugins.lua`](lua/plugins.lua) and change the condition for installing vimtex.[↩](#a1)

after/ftplugin/cpp.vim

@@ -1,10 +1,5 @@
 set commentstring=//\ %s
 
-set tabstop=2       " number of visual spaces per TAB
-set softtabstop=2   " number of spaces in tab when editing
-set shiftwidth=2    " number of spaces to use for autoindent
-set expandtab       " expand tab to spaces so that tabs are spaces
-
 " Disable inserting comment leader after hitting o or O or <Enter>
 set formatoptions-=o
 set formatoptions-=r
@@ -39,6 +34,3 @@ function s:create_term_buf(_type, size) abort
   endif
   execute 'resize ' . a:size
 endfunction
-
-" For delimitMate
-let b:delimitMate_matchpairs = "(:),[:],{:}"

after/ftplugin/gitconfig.vim

@@ -0,0 +1 @@
+set commentstring=#\ %s

after/ftplugin/javascript.vim

@@ -0,0 +1,3 @@
+" Disable inserting comment leader after hitting o or O or <Enter>
+set formatoptions-=o
+set formatoptions-=r

after/ftplugin/json.vim

@@ -0,0 +1,6 @@
+" let the initial folding state be that all folds are closed.
+set foldlevel=0
+
+" Use nvim-treesitter for folding
+set foldmethod=expr
+set foldexpr=nvim_treesitter#foldexpr()

after/ftplugin/lua.vim

@@ -2,7 +2,8 @@
 set formatoptions-=o
 set formatoptions-=r
 
-set tabstop=2       " number of visual spaces per TAB
-set softtabstop=2   " number of spaces in tab when editing
-set shiftwidth=2    " number of spaces to use for autoindent
-set expandtab       " expand tab to spaces so that tabs are spaces
+nnoremap <buffer><silent> <F9> :luafile %<CR>
+
+" Use nvim-treesitter for folding
+set foldmethod=expr
+set foldexpr=nvim_treesitter#foldexpr()

after/ftplugin/python.vim

@@ -8,5 +8,11 @@ set sidescroll=5
 set sidescrolloff=2
 set colorcolumn=100
 
-" For delimitMate
-let b:delimitMate_matchpairs = "(:),[:],{:}"
+set tabstop=4       " number of visual spaces per TAB
+set softtabstop=4   " number of spaces in tab when editing
+set shiftwidth=4    " number of spaces to use for autoindent
+set expandtab       " expand tab to spaces so that tabs are spaces
+
+" Use nvim-treesitter for folding
+set foldmethod=expr
+set foldexpr=nvim_treesitter#foldexpr()

after/ftplugin/sql.vim

@@ -0,0 +1 @@
+set commentstring=--\ %s

after/ftplugin/toml.vim

@@ -1,4 +0,0 @@
-set tabstop=2       " number of visual spaces per TAB
-set softtabstop=2   " number of spaces in tab when editing
-set shiftwidth=2    " number of spaces to use for autoindent
-set expandtab       " expand tab to spaces so that tabs are spaces

after/ftplugin/vim.vim

@@ -12,7 +12,4 @@ set foldmethod=expr foldexpr=utils#VimFolds(v:lnum) foldtext=utils#MyFoldText()
 " see `:h K` and https://stackoverflow.com/q/15867323/6064933
 set keywordprg=:help
 
-set tabstop=2       " number of visual spaces per TAB
-set softtabstop=2   " number of spaces in tab when editing
-set shiftwidth=2    " number of spaces to use for autoindent
-set expandtab       " expand tab to spaces so that tabs are spaces
+nnoremap <buffer><silent> <F9> :source %<CR>

after/ftplugin/yaml.vim

@@ -1,8 +1,3 @@
-set tabstop=2       " number of visual spaces per TAB
-set softtabstop=2   " number of spaces in tab when editing
-set shiftwidth=2    " number of spaces to use for autoindent
-set expandtab       " expand tab to spaces so that tabs are spaces
-
 " Turn off syntax highlighting for large YAML files.
 if line('$') > 500
   setlocal syntax=OFF

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
@@ -131,9 +116,11 @@ function! utils#Get_titlestr() abort
   if g:is_linux
       let l:title_str = hostname() . '  '
   endif
-  let l:title_str = l:title_str . expand('%:p:~') . '  '
-  if &buflisted
-    let l:title_str = l:title_str . strftime('%Y-%m-%d %H:%M',getftime(expand('%')))
+
+  let l:buf_path = expand('%:p:~')
+  let l:title_str = l:title_str . l:buf_path . '  '
+  if &buflisted && l:buf_path != ""
+    let l:title_str = l:title_str . strftime('%Y-%m-%d %H:%M:%S%z', getftime(expand('%')))
   endif
 
   return l:title_str
@@ -141,11 +128,22 @@ endfunction
 
 " Output current time or unix timestamp in human-readable format.
 function! utils#iso_time(timestamp) abort
-  if a:timestamp
-    return strftime('%Y-%m-%d %H:%M:%S%z', a:timestamp)
+  " Get current datetime
+  if !a:timestamp
+    return strftime('%Y-%m-%d %H:%M:%S%z')
   endif
 
-  return strftime('%Y-%m-%d %H:%M:%S%z')
+  " this timestamp in expressed in milliseconds
+  if len(a:timestamp) == 13
+    let l:timestamp = a:timestamp[:-4]
+  " this timestamp in expressed in microseconds
+  elseif len(a:timestamp) == 16
+    let l:timestamp = a:timestamp[:-7]
+  else
+    let l:timestamp = a:timestamp
+  endif
+  return strftime('%Y-%m-%d %H:%M:%S%z', l:timestamp)
+
 endfunction
 
 " Check if we are inside a Git repo.
@@ -154,9 +152,7 @@ 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
-    " lazyloading of fugitive by packer.nvim).
-    " See also https://github.com/wbthomason/packer.nvim/discussions/534.
+    " Manually trigger a special user autocmd InGitRepo (used lazyloading.
     doautocmd User InGitRepo
     return v:true
   endif
@@ -196,14 +192,3 @@ 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/globals.vim

@@ -1,72 +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
-language en_US.utf-8
-
-" 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
-"}}
-"}

core/mappings.vim

@@ -1,192 +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])
-
-" Search in selected region
-xnoremap / :<C-U>call feedkeys('/\%>'.(line("'<")-1).'l\%<'.(line("'>")+1)."l")<CR>
-
-" Find and replace (like Sublime Text 3)
-nnoremap <C-H> :%s/
-xnoremap <C-H> :s/
-
-" 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
-
-" 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

core/themes.vim

@@ -1,91 +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
-
-" 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',
-      \ }
-
-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 == 'info'
-  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).
@@ -21,19 +60,19 @@ 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.
 
 ```
-pip install 'python-lsp-server[all]' pylsp-mypy pyls-isort
+pip install 'python-lsp-server[all]' pylsp-mypy python-lsp-isort python-lsp-black
 ```
 
 Note the executable for pylsp is also named `pylsp`. You need to set its PATH correctly.
 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:
 
@@ -70,16 +109,16 @@ 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.
+Git is required by plugin manager [lazy.nvim](https://github.com/folke/lazy.nvim) and other git-related plugins.
 
 For Linux and macOS, Git is usually pre-installed.
 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.
-Current configuration is tested against nvim v0.7.0.
+This config is only maintained for [the latest nvim stable release](https://github.com/neovim/neovim/releases/tag/stable).
 
-## Linux
+### Linux
 
-We can directly download the binary release from [here](https://github.com/neovim/neovim/releases/download/stable/nvim-linux64.tar.gz).
+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 latest version may not be available.
+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:
 
@@ -173,27 +195,13 @@ 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.
+**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.
 
-I use packer.nvim to manage my plugins. We need to install packer.nvim on our system first.
-
-For Windows, if curl is installed, run the following command (on PowerShell):
-
-```
-git clone --depth=1 https://github.com/wbthomason/packer.nvim "$env:LOCALAPPDATA\nvim-data\site\pack\packer\opt\packer.nvim"
-```
-
-For macOS and Linux, run the following command:
-
-```bash
-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].
@@ -204,21 +212,7 @@ then go to this directory, and run the following command:
 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.
+After that, when we first open nvim, all the plugins will be installed automatically.
 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_install_mac.sh

@@ -9,8 +9,9 @@ if [[ ! -d "$HOME/tools/"  ]]; then
 fi
 
 # Delete existing nvim installation.
-if [[ -d "$HOME/tools/nvim-osx64" ]]; then
-    rm -rf "$HOME/tools/nvim-osx64"
+# For newer release, the directory name is nvim-macos
+if [[ -d "$HOME/tools/nvim-macos" ]]; then
+    rm -rf "$HOME/tools/nvim-macos"
 fi
 
 # Extract the tar ball

docs/nvim_setup_linux.sh

@@ -68,7 +68,7 @@ fi
 
 # Install some Python packages used by Nvim plugins.
 echo "Installing Python packages"
-declare -a py_packages=("pynvim" 'python-lsp-server[all]' "black" "vim-vint" "pyls-isort" "pylsp-mypy")
+declare -a PY_PACKAGES=("pynvim" 'python-lsp-server[all]' "vim-vint" "python-lsp-isort" "pylsp-mypy" "python-lsp-black")
 
 if [[ "$SYSTEM_PYTHON" = true ]]; then
     echo "Using system Python to install $(PY_PACKAGES)"
@@ -76,12 +76,12 @@ if [[ "$SYSTEM_PYTHON" = true ]]; then
     # If we use system Python, we need to install these Python packages under
     # user HOME, since we do not have permissions to install them under system
     # directories.
-    for p in "${py_packages[@]}"; do
+    for p in "${PY_PACKAGES[@]}"; do
         pip install --user "$p"
     done
 else
     echo "Using custom Python to install $(PY_PACKAGES)"
-    for p in "${py_packages[@]}"; do
+    for p in "${PY_PACKAGES[@]}"; do
         "$CONDA_DIR/bin/pip" install "$p"
     done
 fi
@@ -112,6 +112,7 @@ if [[ -z "$(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                         #
+#######################################################################
+LUA_LS_DIR=$HOME/tools/lua-language-server
+LUA_LS_SRC=$HOME/packages/lua-language-server.tar.gz
+LUA_LS_LINK="https://github.com/LuaLS/lua-language-server/releases/download/3.6.11/lua-language-server-3.6.11-linux-x64.tar.gz"
+
+if [[ -z "$(command -v lua-language-server)" ]] && [[ ! -f "$LUA_LS_DIR/bin/lua-language-server" ]]; then
+    echo 'Install lua-language-server'
+    if [[ ! -f $LUA_LS_SRC ]]; then
+        echo "Downloading lua-language-server and renaming"
+        wget $LUA_LS_LINK -O "$LUA_LS_SRC"
+    fi
+
+    if [[ ! -d "$LUA_LS_DIR" ]]; then
+        echo "Creating lua-language-server directory under tools directory"
+        mkdir -p "$LUA_LS_DIR"
+        echo "Extracting to directory $LUA_LS_DIR"
+
+        tar zxvf "$LUA_LS_SRC" -C "$LUA_LS_DIR"
+    fi
+
+    if [[ "$ADD_TO_SYSTEM_PATH" = true ]] && [[ "$USE_BASH_SHELL" = true ]]; then
+        echo "export PATH=\"$LUA_LS_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"
@@ -216,16 +246,13 @@ 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
 
 git clone --depth=1 https://github.com/jdhao/nvim-config.git "$NVIM_CONFIG_DIR"
 
-echo "Installing packer.nvim"
-git clone --depth=1 https://github.com/wbthomason/packer.nvim \
-    ~/.local/share/nvim/site/pack/packer/opt/packer.nvim
-
 echo "Installing nvim plugins, please wait"
-"$NVIM_DIR/bin/nvim" -c "autocmd User PackerComplete quitall" -c "PackerSync"
+"$NVIM_DIR/bin/nvim" -c "autocmd User LazyInstall quitall"  -c "lua require('lazy').install()"
 
 echo "Finished installing Nvim and its dependencies!"

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
@@ -18,14 +20,35 @@ 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
 pip install -U pynvim
 
 # Install python-language-server
-pip install 'python-lsp-server[all]' pylsp-mypy pyls-isort
+pip install 'python-lsp-server[all]' pylsp-mypy python-lsp-isort
+
+# Install visual c++ redistribution
+scoop install vcredist2022
+
+# Install 7zip
+scoop install 7zip
+
+# Install lua-language-server
+$lua_ls_link = "https://github.com/LuaLS/lua-language-server/releases/download/3.6.11/lua-language-server-3.6.11-win32-x64.zip"
+$lua_ls_install_dir = "D:\portable_tools"
+$lua_ls_src_path = "$lua_ls_install_dir\lua-language-server.zip"
+$lua_ls_dir = "$lua_ls_install_dir\lua-language-server"
+
+# Download file, ref: https://stackoverflow.com/a/51225744/6064933
+Invoke-WebRequest $lua_ls_link -OutFile "$lua_ls_src_path"
+
+# Extract the zip file using 7zip, ref: https://stackoverflow.com/a/41933215/6064933
+7z x "$lua_ls_src_path" -o"$lua_ls_dir"
+
+# Setup PATH env variable, ref: https://stackoverflow.com/q/714877/6064933
+[Environment]::SetEnvironmentVariable("Path", $env:Path + ";$lua_ls_dir\bin", "Machine")
 
 # Install neovim nightly
 scoop bucket add versions

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 +1,50 @@
+-- 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: Jiedong Hao
+-- Email: jdhao@hotmail.com
+-- Blog: https://jdhao.github.io/
+-- GitHub: https://github.com/jdhao
+-- StackOverflow: https://stackoverflow.com/users/6064933/jdhao
+vim.loader.enable()
+
+local version = vim.version
+
+-- check if we have the latest stable version of nvim
+local expected_ver = "0.10.0"
+local ev = version.parse(expected_ver)
+local actual_ver = version()
+
+local result = version.cmp(ev, {actual_ver.major, actual_ver.minor, actual_ver.patch})
+
+if  result ~= 0 then
+  local _ver = string.format("%s.%s.%s", actual_ver.major, actual_ver.minor, actual_ver.patch)
+  local msg = string.format("Expect nvim %s, but got %s instead. Use at your own risk!", expected_ver, _ver)
+  vim.api.nvim_err_writeln(msg)
+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
+}
+
+local viml_conf_dir = vim.fn.stdpath("config") .. "/viml_conf"
+-- source all the core config files
+for _, file_name in ipairs(core_conf_files) do
+  if vim.endswith(file_name, 'vim') then
+    local path = string.format("%s/%s", viml_conf_dir, file_name)
+    local source_cmd = "source " .. path
+    vim.cmd(source_cmd)
+  else
+    local module_name, _ = string.gsub(file_name, "%.lua", "")
+    package.loaded[module_name] = nil
+    require(module_name)
+  end
+end

init.vim

@@ -1,22 +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/
-
-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/colorschemes.lua

@@ -0,0 +1,83 @@
+--- 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.colorscheme_conf = {
+  onedark = function()
+    vim.cmd([[colorscheme onedark]])
+  end,
+  edge = function()
+    vim.g.edge_enable_italic = 1
+    vim.g.edge_better_performance = 1
+
+    vim.cmd([[colorscheme edge]])
+  end,
+  sonokai = function()
+    vim.g.sonokai_enable_italic = 1
+    vim.g.sonokai_better_performance = 1
+
+    vim.cmd([[colorscheme sonokai]])
+  end,
+  gruvbox_material = function()
+    -- foreground option can be material, mix, or original
+    vim.g.gruvbox_material_foreground = "material"
+    --background option can be hard, medium, soft
+    vim.g.gruvbox_material_background = "soft"
+    vim.g.gruvbox_material_enable_italic = 1
+    vim.g.gruvbox_material_better_performance = 1
+
+    vim.cmd([[colorscheme gruvbox-material]])
+  end,
+  everforest = function()
+    vim.g.everforest_enable_italic = 1
+    vim.g.everforest_better_performance = 1
+
+    vim.cmd([[colorscheme everforest]])
+  end,
+  nightfox = function()
+    vim.cmd([[colorscheme nordfox]])
+  end,
+  catppuccin = function()
+    -- available option: latte, frappe, macchiato, mocha
+    vim.g.catppuccin_flavour = "frappe"
+    require("catppuccin").setup()
+
+    vim.cmd([[colorscheme catppuccin]])
+  end,
+  onedarkpro = function()
+    -- set colorscheme after options
+    vim.cmd('colorscheme onedark_vivid')
+  end,
+  material = function()
+    vim.g.material_style = "oceanic"
+    vim.cmd('colorscheme material')
+  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.colorscheme_conf))
+
+  if not vim.tbl_contains(vim.tbl_keys(M.colorscheme_conf), colorscheme) then
+    local msg = "Invalid colorscheme: " .. colorscheme
+    vim.notify(msg, vim.log.levels.ERROR, { title = "nvim-config" })
+
+    return
+  end
+
+  -- Load the colorscheme and its settings
+  M.colorscheme_conf[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()

lua/config/alpha-nvim.lua

@@ -1,32 +0,0 @@
-local alpha = require("alpha")
-local dashboard = require("alpha.themes.dashboard")
-
--- Set header
-dashboard.section.header.val = {
-    "                                                     ",
-    "  ███╗   ██╗███████╗ ██████╗ ██╗   ██╗██╗███╗   ███╗ ",
-    "  ████╗  ██║██╔════╝██╔═══██╗██║   ██║██║████╗ ████║ ",
-    "  ██╔██╗ ██║█████╗  ██║   ██║██║   ██║██║██╔████╔██║ ",
-    "  ██║╚██╗██║██╔══╝  ██║   ██║╚██╗ ██╔╝██║██║╚██╔╝██║ ",
-    "  ██║ ╚████║███████╗╚██████╔╝ ╚████╔╝ ██║██║ ╚═╝ ██║ ",
-    "  ╚═╝  ╚═══╝╚══════╝ ╚═════╝   ╚═══╝  ╚═╝╚═╝     ╚═╝ ",
-    "                                                     ",
-}
-
--- Set menu
-dashboard.section.buttons.val = {
-    dashboard.button( "Leader f f", "  > Find file", ":Leaderf file --popup<CR>"),
-    dashboard.button( "Leader f r", "  > Recent files"   , ":Leaderf mru --popup<CR>"),
-    dashboard.button( "Leader f g", "  > Project grep" , ":Leaderf rg --popup<CR>"),
-    dashboard.button( "u", "  > Update plugins" , ":PackerSync<CR>"),
-    dashboard.button( "e", "  > New file" , ":enew <CR>"),
-    dashboard.button( "q", "  > Quit NVIM", ":qa<CR>"),
-}
-
-local fortune = require("alpha.fortune")
-dashboard.section.footer.val = fortune()
-
-alpha.setup(dashboard.opts)
-
--- Send config to alpha
-alpha.setup(dashboard.opts)

lua/config/autosave.lua

@@ -1,15 +0,0 @@
-require("autosave").setup({
-	enabled = true,
-	execution_message = "Autosaved at " .. vim.fn.strftime("%H:%M:%S"),
-	events = { "InsertLeave", "TextChanged" },
-	conditions = {
-		exists = true,
-		filename_is_not = {"plugins.lua"},
-		filetype_is_not = {},
-		modifiable = true,
-	},
-	write_all_buffers = false,
-	on_off_commands = true,
-	clean_command_line_interval = 1000,
-	debounce_delay = 135,
-})

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

@@ -1,12 +1,15 @@
-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 = "▎",
-    buffer_close_icon = "",
+    indicator = {
+      icon = "▎", -- this should be omitted if indicator style is not 'icon'
+      style = "icon",
+    },
+    buffer_close_icon = "",
     modified_icon = "●",
     close_icon = "",
     left_trunc_marker = "",
@@ -40,4 +43,4 @@ require("bufferline").setup({
     always_show_bufferline = true,
     sort_by = "id",
   },
-})
+}

lua/config/dashboard-nvim.lua

@@ -0,0 +1,75 @@
+local api = vim.api
+local keymap = vim.keymap
+local dashboard = require("dashboard")
+
+local conf = {}
+conf.header = {
+  "                                                       ",
+  "                                                       ",
+  "                                                       ",
+  " ███╗   ██╗ ███████╗ ██████╗  ██╗   ██╗ ██╗ ███╗   ███╗",
+  " ████╗  ██║ ██╔════╝██╔═══██╗ ██║   ██║ ██║ ████╗ ████║",
+  " ██╔██╗ ██║ █████╗  ██║   ██║ ██║   ██║ ██║ ██╔████╔██║",
+  " ██║╚██╗██║ ██╔══╝  ██║   ██║ ╚██╗ ██╔╝ ██║ ██║╚██╔╝██║",
+  " ██║ ╚████║ ███████╗╚██████╔╝  ╚████╔╝  ██║ ██║ ╚═╝ ██║",
+  " ╚═╝  ╚═══╝ ╚══════╝ ╚═════╝    ╚═══╝   ╚═╝ ╚═╝     ╚═╝",
+  "                                                       ",
+  "                                                       ",
+  "                                                       ",
+  "                                                       ",
+}
+
+conf.center = {
+  {
+    icon = "󰈞  ",
+    desc = "Find  File                              ",
+    action = "Leaderf file --popup",
+    key = "<Leader> f f",
+  },
+  {
+    icon = "󰈢  ",
+    desc = "Recently opened files                   ",
+    action = "Leaderf mru --popup",
+    key = "<Leader> f r",
+  },
+  {
+    icon = "󰈬  ",
+    desc = "Project grep                            ",
+    action = "Leaderf rg --popup",
+    key = "<Leader> f g",
+  },
+  {
+    icon = "  ",
+    desc = "Open Nvim config                        ",
+    action = "tabnew $MYVIMRC | tcd %:p:h",
+    key = "<Leader> e v",
+  },
+  {
+    icon = "  ",
+    desc = "New file                                ",
+    action = "enew",
+    key = "e",
+  },
+  {
+    icon = "󰗼  ",
+    desc = "Quit Nvim                               ",
+    -- desc = "Quit Nvim                               ",
+    action = "qa",
+    key = "q",
+  },
+}
+
+dashboard.setup({
+  theme = 'doom',
+  shortcut_type = 'number',
+  config = conf
+})
+
+api.nvim_create_autocmd("FileType", {
+  pattern = "dashboard",
+  group = api.nvim_create_augroup("dashboard_enter", { clear = true }),
+  callback = function ()
+    keymap.set("n", "q", ":qa<CR>", { buffer = true, silent = true })
+    keymap.set("n", "e", ":enew<CR>", { buffer = true, silent = true })
+  end
+})

lua/config/fidget-nvim.lua

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

lua/config/fugitive.lua

@@ -0,0 +1,11 @@
+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" })
+
+-- convert git to Git in command line mode
+vim.fn['utils#Cabbrev']('git', 'Git')

lua/config/git-linker.lua

@@ -0,0 +1,37 @@
+local keymap = vim.keymap
+local gitlinker = require("gitlinker")
+
+gitlinker.setup {
+  callbacks = {
+    ["dev.azure.com"] = function(url_data)
+      vim.print(url_data)
+      local url = require"gitlinker.hosts".get_base_https_url(url_data)
+
+      if url_data.lstart then
+        if url_data.lend == nil then
+          url_data.lend = url_data.lstart
+        end
+        url = url .. "?path=/" .. url_data.file .. "&version=GC" .. url_data.rev .. "&line=" .. url_data.lstart .. "&lineEnd=" .. url_data.lend .. "&lineStartColumn=1" .. "&lineEndColumn=120"
+      end
+      return url
+    end
+  },
+  mappings = nil,
+}
+
+keymap.set({ "n", "v" }, "<leader>gl", function()
+  local mode = string.lower(vim.fn.mode())
+  gitlinker.get_buf_range_url(mode)
+end, {
+  silent = true,
+  desc = "get git permlink",
+})
+
+keymap.set("n", "<leader>gb", function()
+  gitlinker.get_repo_url({
+    action_callback = gitlinker.actions.open_in_browser
+  })
+end, {
+  silent = true,
+  desc = "browse repo in browser",
+})

lua/config/gitsigns.lua

@@ -0,0 +1,57 @@
+local gs = require("gitsigns")
+
+gs.setup {
+  signs = {
+    add = { text = "+" },
+    change = { text = "~" },
+    delete = { text = "_" },
+    topdelete = { text = "‾" },
+    changedelete = { text = "│" },
+  },
+  word_diff = true,
+  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,
+}
+
+vim.api.nvim_create_autocmd('ColorScheme', {
+  pattern = "*",
+  callback = function()
+    vim.cmd [[
+      hi GitSignsChangeInline gui=reverse
+      hi GitSignsAddInline gui=reverse
+      hi GitSignsDeleteInline gui=reverse
+    ]]
+  end
+})

lua/config/hlslens.lua

@@ -1,21 +1,49 @@
-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.cmd, cmd)
+
+  -- Deal with the case that there is no such pattern in current buffer.
+  if not status then
+    local start_idx, _ = string.find(msg, 'E486', 1, true)
+    local msg_part = string.sub(msg, start_idx)
+    api.nvim_err_writeln(msg_part)
+    return
+  end
+
+  hlslens.start()
+end
+
+keymap.set("n", "n", "", {
+  callback = function()
+    activate_hlslens("n")
+  end,
 })
 
-vim.api.nvim_set_keymap(
-  "n",
-  "n",
-  "<Cmd>execute('normal! ' . v:count1 . 'nzzzv')<CR><Cmd>lua require('hlslens').start()<CR>",
-  { noremap = true, silent = true }
-)
+keymap.set("n", "N", "", {
+  callback = function()
+    activate_hlslens("N")
+  end,
+})
 
-vim.api.nvim_set_keymap(
-  "n",
-  "N",
-  "<Cmd>execute('normal! ' . v:count1 . 'Nzzzv')<CR><Cmd>lua require('hlslens').start()<CR>",
-  { noremap = true, silent = true }
-)
-
-vim.api.nvim_set_keymap("n", "*", "<Plug>(asterisk-z*)<Cmd>lua require('hlslens').start()<CR>", { silent = true })
-vim.api.nvim_set_keymap("n", "#", "<Plug>(asterisk-z#)<Cmd>lua require('hlslens').start()<CR>", { silent = true })
+keymap.set("n", "*", "", {
+  callback = function()
+    vim.fn.execute("normal! *N")
+    hlslens.start()
+  end,
+})
+keymap.set("n", "#", "", {
+  callback = function()
+    vim.fn.execute("normal! #N")
+    hlslens.start()
+  end,
+})

lua/config/indent-blankline.lua

@@ -1,23 +1,36 @@
-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" },
+local api = vim.api
+
+local exclude_ft = { "help", "git", "markdown", "snippets", "text", "gitconfig", "alpha", "dashboard" }
+
+require("ibl").setup {
+  indent = {
+    -- -- U+2502 may also be a good choice, it will be on the middle of cursor.
+    -- -- U+250A is also a good choice
+    char = "▏",
+  },
+  scope = {
+    show_start = false,
+    show_end = false,
+  },
+  exclude = {
+    filetypes = exclude_ft,
+    buftypes = { "terminal" },
+  },
+}
+
+local gid = api.nvim_create_augroup("indent_blankline", { clear = true })
+api.nvim_create_autocmd("InsertEnter", {
+  pattern = "*",
+  group = gid,
+  command = "IBLDisable",
 })
 
-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([[IBLEnable]])
+    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

@@ -1,88 +1,153 @@
+local fn = vim.fn
 local api = vim.api
+local keymap = vim.keymap
 local lsp = vim.lsp
+local diagnostic = vim.diagnostic
 
 local utils = require("utils")
 
-local M = {}
+-- set quickfix list from diagnostics in a certain buffer, not the whole workspace
+local set_qflist = function(buf_num, severity)
+  local diagnostics = nil
+  diagnostics = diagnostic.get(buf_num, { severity = severity })
 
-function M.show_line_diagnostics()
-  local opts = {
-    focusable = false,
-    close_events = { "BufLeave", "CursorMoved", "InsertEnter", "FocusLost" },
-    border = 'rounded',
-    source = 'always',  -- show source in diagnostic popup window
-    prefix = ' '
-  }
-  vim.diagnostic.open_float(nil, opts)
+  local qf_items = diagnostic.toqflist(diagnostics)
+  vim.fn.setqflist({}, ' ', { title = 'Diagnostics', items = qf_items })
+
+  -- open quickfix by default
+  vim.cmd[[copen]]
 end
 
 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.cmd([[
-    autocmd CursorHold <buffer> lua require('config.lsp').show_line_diagnostics()
-  ]])
+  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", diagnostic.goto_prev, { desc = "previous diagnostic" })
+  map("n", "]d", diagnostic.goto_next, { desc = "next diagnostic" })
+  -- this puts diagnostics from opened files to quickfix
+  map("n", "<space>qw", diagnostic.setqflist, { desc = "put window diagnostics to qf" })
+  -- this puts diagnostics from current buffer to quickfix
+  map("n", "<space>qb", function() set_qflist(bufnr) end, { desc = "put buffer diagnostics 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
-    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)
+  if client.server_capabilities.documentFormattingProvider then
+    map("n", "<space>f", vim.lsp.buf.format, { desc = "format code" })
   end
 
+  api.nvim_create_autocmd("CursorHold", {
+    buffer = bufnr,
+    callback = function()
+      local float_opts = {
+        focusable = false,
+        close_events = { "BufLeave", "CursorMoved", "InsertEnter", "FocusLost" },
+        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 = 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 #diagnostic.get() > 0
+      then
+        diagnostic.open_float(nil, float_opts)
+      end
+
+      vim.b.diagnostics_pos = cursor_pos
+    end,
+  })
+
   -- The blow command will highlight the current variable and its usages in the buffer.
-  if client.resolved_capabilities.document_highlight then
+  if client.server_capabilities.documentHighlightProvider then
     vim.cmd([[
       hi! link LspReferenceRead Visual
       hi! link LspReferenceText Visual
       hi! link LspReferenceWrite Visual
-      augroup lsp_document_highlight
-        autocmd! * <buffer>
-        autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()
-        autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()
-      augroup END
     ]])
+
+    local gid = api.nvim_create_augroup("lsp_document_highlight", { clear = true })
+    api.nvim_create_autocmd("CursorHold" , {
+      group = gid,
+      buffer = bufnr,
+      callback = function ()
+        lsp.buf.document_highlight()
+      end
+    })
+
+    api.nvim_create_autocmd("CursorMoved" , {
+      group = gid,
+      buffer = bufnr,
+      callback = function ()
+        lsp.buf.clear_references()
+      end
+    })
   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.textDocument.completion.completionItem.snippetSupport = true
+local capabilities = require('cmp_nvim_lsp').default_capabilities()
 
 local lspconfig = require("lspconfig")
 
-if utils.executable('pylsp') then
-  lspconfig.pylsp.setup({
+if utils.executable("pylsp") then
+  local venv_path = os.getenv('VIRTUAL_ENV')
+  local py_path = nil
+  -- decide which python executable to use for mypy
+  if venv_path ~= nil then
+    py_path = venv_path .. "/bin/python3"
+  else
+    py_path = vim.g.python3_host_prog
+  end
+
+  lspconfig.pylsp.setup {
     on_attach = custom_attach,
     settings = {
       pylsp = {
         plugins = {
+          -- formatter options
+          black = { enabled = true },
+          autopep8 = { enabled = false },
+          yapf = { enabled = false },
+          -- linter options
           pylint = { enabled = true, executable = "pylint" },
+          ruff = { enabled = false },
           pyflakes = { enabled = false },
           pycodestyle = { enabled = false },
+          -- type checker
+          pylsp_mypy = {
+            enabled = true,
+            overrides = { "--python-executable", py_path, true },
+            report_progress = true,
+            live_mode = false
+          },
+          -- auto-completion options
           jedi_completion = { fuzzy = true },
-          pyls_isort = { enabled = true },
-          pylsp_mypy = { enabled = true },
+          -- import sorting
+          isort = { enabled = true },
         },
       },
     },
@@ -90,9 +155,9 @@ 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
@@ -101,93 +166,99 @@ 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("ltex-ls") then
+  lspconfig.ltex.setup {
+    on_attach = custom_attach,
+    cmd = { "ltex-ls" },
+    filetypes = { "text", "plaintex", "tex", "markdown" },
+    settings = {
+      ltex = {
+        language = "en"
+      },
+    },
+    flags = { debounce_text_changes = 300 },
+}
+end
+
+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'})
+  }
 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 = vim.fn.exepath("lua-language-server")
-if vim.g.is_mac or vim.g.is_linux and sumneko_binary_path ~= "" then
-  local sumneko_root_path = vim.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/LuaLS/lua-language-server/wiki/Settings .
+  lspconfig.lua_ls.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/LuaLS/lua-language-server/wiki/Libraries#link-to-workspace .
+          -- Lua-dev.nvim also has similar settings for lua ls, https://github.com/folke/neodev.nvim/blob/main/lua/neodev/luals.lua .
+          library = {
+            vim.env.VIMRUNTIME,
+            fn.stdpath("config"),
+          },
+          maxPreload = 2000,
+          preloadFileSize = 50000,
         },
       },
     },
     capabilities = capabilities,
-  })
+  }
 end
 
 -- Change diagnostic signs.
-vim.fn.sign_define("DiagnosticSignError", { text = "✗", texthl = "DiagnosticSignError" })
-vim.fn.sign_define("DiagnosticSignWarn", { text = "!", texthl = "DiagnosticSignWarn" })
-vim.fn.sign_define("DiagnosticSignInformation", { text = "", texthl = "DiagnosticSignInfo" })
-vim.fn.sign_define("DiagnosticSignHint", { text = "", texthl = "DiagnosticSignHint" })
+fn.sign_define("DiagnosticSignError", { text = '🆇', texthl = "DiagnosticSignError" })
+fn.sign_define("DiagnosticSignWarn", { text = '⚠️', texthl = "DiagnosticSignWarn" })
+fn.sign_define("DiagnosticSignInfo", { text = 'ℹ️', texthl = "DiagnosticSignInfo" })
+fn.sign_define("DiagnosticSignHint", { text = '', texthl = "DiagnosticSignHint" })
 
 -- global config for diagnostic
-vim.diagnostic.config({
+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,
@@ -200,5 +271,3 @@ vim.diagnostic.config({
 lsp.handlers["textDocument/hover"] = lsp.with(vim.lsp.handlers.hover, {
   border = "rounded",
 })
-
-return M

lua/config/neoscroll.lua

@@ -1,21 +0,0 @@
-require("neoscroll").setup({
-  easing_function = "quadratic",
-})
-
-local t = {}
--- Syntax: t[keys] = {function, {function arguments}}
--- Use the "sine" easing function
-t["<C-u>"] = { "scroll", { "-vim.wo.scroll", "true", "20", [['cubic']] } }
-t["<C-d>"] = { "scroll", { "vim.wo.scroll", "true", "20", [['cubic']] } }
--- Use the "circular" easing function
-t["<C-b>"] = { "scroll", { "-vim.api.nvim_win_get_height(0)", "true", "50", [['cubic']] } }
-t["<C-f>"] = { "scroll", { "vim.api.nvim_win_get_height(0)", "true", "50", [['cubic']] } }
--- Pass "nil" to disable the easing animation (constant scrolling speed)
-t["<C-y>"] = { "scroll", { "-0.10", "false", "100", nil } }
-t["<C-e>"] = { "scroll", { "0.10", "false", "100", nil } }
--- When no easing function is provided the default easing function (in this case "quadratic") will be used
-t["zt"] = { "zt", { "10" } }
-t["zz"] = { "zz", { "10" } }
-t["zb"] = { "zb", { "10" } }
-
-require("neoscroll.config").set_mappings(t)

lua/config/nvim-cmp.lua

@@ -1,69 +1,76 @@
 -- 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 = 'nvim_lua' }, -- for nvim lua function
-    { 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 = "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]",
+      },
+    },
+  },
+}
+
+cmp.setup.filetype("tex", {
+  sources = {
+    { name = "omni" },
+    { name = "ultisnips" }, -- For ultisnips user.
+    { name = "buffer", keyword_length = 2 }, -- for buffer word completion
+    { name = "path" }, -- for path completion
   },
 })
 
 --  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
@@ -81,4 +88,4 @@ 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

@@ -1,62 +1,108 @@
+local keymap = vim.keymap
 local nvim_tree = require("nvim-tree")
 
-nvim_tree.setup({
-	disable_netrw = true,
-	hijack_netrw = true,
-	open_on_setup = false,
-	ignore_ft_on_setup = {},
-	open_on_tab = false,
-	hijack_cursor = false,
-	update_cwd = false,
-	update_to_buf_dir = {
-		enable = true,
-		auto_open = true,
-	},
-	diagnostics = {
-		enable = false,
-		icons = {
-			hint = "",
-			info = "",
-			warning = "",
-			error = "",
-		},
-	},
-	update_focused_file = {
-		enable = false,
-		update_cwd = false,
-		ignore_list = {},
-	},
-	system_open = {
-		cmd = nil,
-		args = {},
-	},
-	filters = {
-		dotfiles = false,
-		custom = {},
-	},
-	git = {
-		enable = true,
-		ignore = true,
-		timeout = 500,
-	},
-	view = {
-		width = 35,
-		height = 30,
-		hide_root_folder = false,
-		side = "left",
-		auto_resize = true,
-		mappings = {
-			custom_only = false,
-			list = {},
-		},
-		number = false,
-		relativenumber = false,
-		signcolumn = "yes",
-	},
-	trash = {
-		cmd = "trash",
-		require_confirm = true,
-	},
-})
+nvim_tree.setup {
+  auto_reload_on_write = true,
+  disable_netrw = false,
+  hijack_netrw = true,
+  hijack_cursor = false,
+  hijack_unnamed_buffer_when_opening = false,
+  open_on_tab = false,
+  sort_by = "name",
+  update_cwd = false,
+  view = {
+    width = 30,
+    side = "left",
+    preserve_window_proportions = false,
+    number = false,
+    relativenumber = false,
+    signcolumn = "yes",
+  },
+  renderer = {
+    indent_markers = {
+      enable = false,
+      icons = {
+        corner = "└ ",
+        edge = "│ ",
+        none = "  ",
+      },
+    },
+    icons = {
+      webdev_colors = true,
+    },
+  },
+  hijack_directories = {
+    enable = true,
+    auto_open = true,
+  },
+  update_focused_file = {
+    enable = false,
+    update_cwd = false,
+    ignore_list = {},
+  },
+  system_open = {
+    cmd = "",
+    args = {},
+  },
+  diagnostics = {
+    enable = false,
+    show_on_dirs = false,
+    icons = {
+      hint = "",
+      info = "",
+      warning = "",
+      error = "",
+    },
+  },
+  filters = {
+    dotfiles = false,
+    custom = {},
+    exclude = {},
+  },
+  git = {
+    enable = true,
+    ignore = true,
+    timeout = 400,
+  },
+  actions = {
+    use_system_clipboard = true,
+    change_dir = {
+      enable = true,
+      global = false,
+      restrict_above_cwd = false,
+    },
+    open_file = {
+      quit_on_open = false,
+      resize_window = false,
+      window_picker = {
+        enable = true,
+        chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890",
+        exclude = {
+          filetype = { "notify", "qf", "diff", "fugitive", "fugitiveblame" },
+          buftype = { "nofile", "terminal", "help" },
+        },
+      },
+    },
+  },
+  trash = {
+    cmd = "trash",
+    require_confirm = true,
+  },
+  log = {
+    enable = false,
+    truncate = false,
+    types = {
+      all = false,
+      config = false,
+      copy_paste = false,
+      diagnostics = false,
+      git = false,
+      profile = false,
+    },
+  },
+}
 
-vim.api.nvim_set_keymap("n", "<space>s", "<cmd>lua require'nvim-tree'.toggle(false, true)<CR>", { noremap = true, silent = true })
+keymap.set("n", "<space>s", require("nvim-tree.api").tree.toggle, {
+  silent = true,
+  desc = "toggle nvim-tree",
+})

lua/config/nvim_hop.lua

@@ -1,11 +1,28 @@
-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>",
+  match_mappings = { "zh_sc" }
+}
+
+keymap.set({ "n", "v", "o" }, "f", "", {
+  silent = true,
+  noremap = true,
+  callback = function()
+    hop.hint_char2()
+  end,
+  desc = "nvim-hop char2",
 })
 
-vim.api.nvim_set_keymap('n', 'f', "<cmd>lua require'hop'.hint_char2()<cr>", {noremap = true})
+vim.api.nvim_create_autocmd("ColorScheme", {
+  pattern = "*",
+  callback = function()
+    vim.cmd([[
+      hi HopNextKey cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff
+      hi HopNextKey1 cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff
+      hi HopNextKey2 cterm=bold ctermfg=176 gui=bold guibg=#ff00ff guifg=#ffffff
+    ]])
+  end
+})

lua/config/statusline.lua

@@ -1,3 +1,5 @@
+local fn = vim.fn
+
 local function spell()
   if vim.o.spell then
     return string.format("[SPELL]")
@@ -6,12 +8,18 @@ local function spell()
   return ""
 end
 
+--- show indicator for Chinese IME
 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 = vim.fn.libcall(vim.g.XkbSwitchLib, 'Xkb_Switch_getXkbLayout', '')
-    if layout == '0' then
-      return '[CN]'
+    local layout = fn.libcall(vim.g.XkbSwitchLib, "Xkb_Switch_getXkbLayout", "")
+
+    -- We can use `xkbswitch -g` on the command line to get current mode.
+    -- mode for macOS builtin pinyin IME: com.apple.inputmethod.SCIM.ITABC
+    -- mode for Rime: im.rime.inputmethod.Squirrel.Rime
+    local res = fn.match(layout, [[\v(Squirrel\.Rime|SCIM.ITABC)]])
+    if res ~= -1 then
+      return "[CN]"
     end
   end
 
@@ -19,44 +27,98 @@ local function ime_state()
 end
 
 local function trailing_space()
-  -- Get the positions of trailing whitespaces from plugin 'jdhao/whitespace.nvim'.
-  local trailing_space_pos = vim.b.trailing_whitespace_pos
+  if not vim.o.modifiable then
+    return ""
+  end
+
+  local line_num = nil
+
+  for i = 1, fn.line("$") do
+    local linetext = fn.getline(i)
+    -- To prevent invalid escape error, we wrap the regex string with `[[]]`.
+    local idx = fn.match(linetext, [[\v\s+$]])
+
+    if idx ~= -1 then
+      line_num = i
+      break
+    end
+  end
 
   local msg = ""
-  if #trailing_space_pos > 0 then
-    -- Note that lua index is 1-based, not zero based!!!
-    local line = trailing_space_pos[1][1]
-    msg = string.format("[%d]trailing", line)
+  if line_num ~= nil then
+    msg = string.format("[%d]trailing", line_num)
   end
 
   return msg
 end
 
 local function mixed_indent()
+  if not vim.o.modifiable then
+    return ""
+  end
+
   local space_pat = [[\v^ +]]
   local tab_pat = [[\v^\t+]]
-  local space_indent = vim.fn.search(space_pat, 'nwc')
-  local tab_indent = vim.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 = vim.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 = vim.fn.searchcount({pattern=space_pat, max_count=1e3}).total
-  local tab_indent_cnt =  vim.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.print(info)
+  return info
+end
+
+local virtual_env = function()
+  -- only show virtual env for Python
+  if vim.bo.filetype ~= 'python' then
+    return ""
+  end
+
+  local conda_env = os.getenv('CONDA_DEFAULT_ENV')
+  local venv_path = os.getenv('VIRTUAL_ENV')
+
+  if venv_path == nil then
+    if conda_env == nil then
+      return ""
+    else
+      return string.format("  %s (conda)", conda_env)
+    end
+  else
+    local venv_name = vim.fn.fnamemodify(venv_path, ':t')
+    return string.format("  %s (venv)", venv_name)
+  end
+end
+
+require("lualine").setup {
   options = {
     icons_enabled = true,
     theme = "auto",
@@ -69,16 +131,31 @@ require("lualine").setup({
   },
   sections = {
     lualine_a = { "mode" },
-    lualine_b = { "branch", "diff" },
+    lualine_b = {
+      "branch",
+      {
+        "diff",
+        source = diff,
+      },
+      {
+        virtual_env,
+        color = { fg = 'black', bg = "#F1CA81" }
+      }
+    },
     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" },
+      },
+      {
+        "diagnostics",
+        sources = { "nvim_diagnostic" },
+        symbols = {error = '🆇 ', warn = '⚠️ ', info = 'ℹ️ ', hint = ' '},
       },
     },
     lualine_x = {
@@ -93,20 +170,17 @@ require("lualine").setup({
       },
       "filetype",
     },
-    lualine_y = { "progress" },
-    lualine_z = {
+    lualine_y = {
       "location",
-      {
-        "diagnostics",
-        sources = { "nvim_diagnostic" }
-      },
+    },
+    lualine_z = {
       {
         trailing_space,
-        color = "WarningMsg"
+        color = "WarningMsg",
       },
       {
         mixed_indent,
-        color = "WarningMsg"
+        color = "WarningMsg",
       },
     },
   },
@@ -119,6 +193,5 @@ 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", "json", "toml" },
   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
+    disable = { 'help' }, -- list of language that will be disabled
   },
-})
+}

lua/config/which-key.lua

@@ -1,60 +1,6 @@
-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
-    spelling = {
-      enabled = true, -- enabling this will show WhichKey when pressing z= to select spelling suggestions
-      suggestions = 9, -- how many suggestions should be shown in the list?
-    },
-    -- the presets plugin, adds help for a bunch of default keybindings in Neovim
-    -- No actual key bindings are created
-    presets = {
-      operators = true, -- adds help for operators like d, y, ... and registers them for motion / text object completion
-      motions = true, -- adds help for motions
-      text_objects = true, -- help for text objects triggered after entering an operator
-      windows = true, -- default bindings on <c-w>
-      nav = true, -- misc bindings to work with windows
-      z = true, -- bindings for folds, spelling and others prefixed with z
-      g = true, -- bindings for prefixed with g
-    },
-  },
-  -- add operators that will trigger motion and text object completion
-  -- to enable all native operators, set the preset / operators plugin above
-  operators = { gc = "Comments" },
-  key_labels = {
-    -- override the label used to display some keys. It doesn't effect WK in any other way.
-    -- For example:
-    -- ["<space>"] = "SPC",
-    -- ["<cr>"] = "RET",
-    -- ["<tab>"] = "TAB",
-  },
+require("which-key").setup {
+  preset = "modern",
   icons = {
-    breadcrumb = "»", -- symbol used in the command line area that shows your active key combo
-    separator = "➜", -- symbol used between a key and it's label
-    group = "+", -- symbol prepended to a group
-  },
-  window = {
-    border = "none", -- none, single, double, shadow
-    position = "bottom", -- bottom, top
-    margin = { 0, 0, 0, 0 }, -- extra window margin [top, right, bottom, left]
-    padding = { 1, 0, 1, 0 }, -- extra window padding [top, right, bottom, left]
-  },
-  layout = {
-    height = { min = 1, max = 25 }, -- min and max height of the columns
-    width = { min = 20, max = 50 }, -- min and max width of the columns
-    spacing = 1, -- spacing between columns
-    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
-  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
-
-  triggers_blacklist = {
-    -- list of mode / prefixes that should never be hooked by WhichKey
-    -- this is mostly relevant for key maps that start with a native binding
-    -- most people should not need to change this
-    n = { "o", "O" },
-  },
-})
+    mappings = false
+  }
+}

lua/config/yanky.lua

@@ -0,0 +1,13 @@
+require("yanky").setup({
+  ring = {
+    history_length = 50,
+    storage = "memory",
+  },
+  preserve_cursor_position = {
+    enabled = false,
+  },
+})
+
+-- cycle through the yank history, only work after paste
+vim.keymap.set("n", "[y", "<Plug>(YankyCycleForward)")
+vim.keymap.set("n", "]y", "<Plug>(YankyCycleBackward)")

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 +1,105 @@
+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`
+local yank_group = api.nvim_create_augroup("highlight_yank", { clear = true })
+api.nvim_create_autocmd({ "TextYankPost" }, {
+  pattern = "*",
+  group = yank_group,
+  callback = function()
+    vim.highlight.on_yank { higroup = "YankColor", timeout = 300 }
+  end,
+})
+
+api.nvim_create_autocmd({ "CursorMoved" }, {
+  pattern = "*",
+  group = yank_group,
+  callback = function()
+    vim.g.current_cursor_pos = vim.fn.getcurpos()
+  end,
+})
+
+api.nvim_create_autocmd("TextYankPost", {
+  pattern = "*",
+  group = yank_group,
+  callback = function(ev)
+    if vim.v.event.operator == 'y' then
+      vim.fn.setpos('.', vim.g.current_cursor_pos)
+    end
+  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 =",
+})
+
+local function open_nvim_tree(data)
+  -- check if buffer is a directory
+  local directory = vim.fn.isdirectory(data.file) == 1
+
+  if not directory then
+    return
+  end
+
+  -- create a new, empty buffer
+  vim.cmd.enew()
+
+  -- wipe the directory buffer
+  vim.cmd.bw(data.buf)
+
+  -- open the tree
+  require("nvim-tree.api").tree.open()
+end
+
+vim.api.nvim_create_autocmd({ "VimEnter" }, { callback = open_nvim_tree })

lua/globals.lua

@@ -0,0 +1,75 @@
+local fn = vim.fn
+local api = vim.api
+
+local utils = require('utils')
+
+-- Inspect something
+function _G.inspect(item)
+  vim.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
+vim.cmd [[language en_US.UTF-8]]
+
+-- 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

lua/lua-init.lua

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

lua/mappings.lua

@@ -0,0 +1,233 @@
+local keymap = vim.keymap
+local api = vim.api
+local uv = vim.uv
+
+-- 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", function()
+  vim.cmd([[
+      update $MYVIMRC
+      source $MYVIMRC
+    ]])
+  vim.notify("Nvim config successfully reloaded!", vim.log.levels.INFO, { title = "nvim-config" })
+end, {
+  silent = true,
+  desc = "reload init.lua",
+})
+
+-- 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", ":<C-U>call text_obj#Buffer()<cr>", { desc = "buffer text object" })
+
+-- Do not move my cursor when joining lines.
+keymap.set("n", "J", function()
+  vim.cmd([[
+      normal! mzJ`z
+      delmarks z
+    ]])
+end, {
+  desc = "join lines without moving cursor",
+})
+
+keymap.set("n", "gJ", function()
+  -- we must use `normal!`, otherwise it will trigger recursive mapping
+  vim.cmd([[
+      normal! mzgJ`z
+      delmarks z
+    ]])
+end, {
+  desc = "join lines without moving cursor",
+})
+
+-- 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")
+
+-- 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>")
+
+keymap.set("n", "<leader>cb", function()
+  local cnt = 0
+  local blink_times = 7
+  local timer = uv.new_timer()
+
+  timer:start(0, 100, vim.schedule_wrap(function()
+    vim.cmd [[
+      set cursorcolumn!
+      set cursorline!
+    ]]
+
+    if cnt == blink_times then
+      timer:close()
+    end
+
+    cnt = cnt + 1
+  end)
+  )
+end,
+  { desc = "show cursor" })

lua/plugin_specs.lua

@@ -0,0 +1,506 @@
+local utils = require("utils")
+
+local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
+
+if not vim.uv.fs_stat(lazypath) then
+  vim.fn.system {
+    "git",
+    "clone",
+    "--filter=blob:none",
+    "https://github.com/folke/lazy.nvim.git",
+    "--branch=stable", -- latest stable release
+    lazypath,
+  }
+end
+vim.opt.rtp:prepend(lazypath)
+
+-- check if firenvim is active
+local firenvim_not_active = function()
+  return not vim.g.started_by_firenvim
+end
+
+local plugin_specs = {
+  -- auto-completion engine
+  {
+    "hrsh7th/nvim-cmp",
+    -- event = 'InsertEnter',
+    event = "VeryLazy",
+    dependencies = {
+      "hrsh7th/cmp-nvim-lsp",
+      "onsails/lspkind-nvim",
+      "hrsh7th/cmp-path",
+      "hrsh7th/cmp-buffer",
+      "hrsh7th/cmp-omni",
+      "hrsh7th/cmp-emoji",
+      "quangnguyen30192/cmp-nvim-ultisnips",
+    },
+    config = function()
+      require("config.nvim-cmp")
+    end,
+  },
+
+  {
+    "neovim/nvim-lspconfig",
+    event = { "BufRead", "BufNewFile" },
+    config = function()
+      require("config.lsp")
+    end,
+  },
+
+  {
+    "nvim-treesitter/nvim-treesitter",
+    enabled = function()
+      if vim.g.is_mac then
+        return true
+      end
+      return false
+    end,
+    event = "VeryLazy",
+    build = ":TSUpdate",
+    config = function()
+      require("config.treesitter")
+    end,
+  },
+
+  -- Python indent (follows the PEP8 style)
+  { "Vimjas/vim-python-pep8-indent", ft = { "python" } },
+
+  -- Python-related text object
+  { "jeetsukumaran/vim-pythonsense", ft = { "python" } },
+
+  { "machakann/vim-swap", event = "VeryLazy" },
+
+  -- IDE for Lisp
+  -- 'kovisoft/slimv'
+  {
+    "vlime/vlime",
+    enabled = function()
+      if utils.executable("sbcl") then
+        return true
+      end
+      return false
+    end,
+    config = function(plugin)
+      vim.opt.rtp:append(plugin.dir .. "/vim")
+    end,
+    ft = { "lisp" },
+  },
+
+  -- Super fast buffer jump
+  {
+    "smoka7/hop.nvim",
+    event = "VeryLazy",
+    config = function()
+      require("config.nvim_hop")
+    end,
+  },
+
+  -- Show match number and index for searching
+  {
+    "kevinhwang91/nvim-hlslens",
+    branch = "main",
+    keys = { "*", "#", "n", "N" },
+    config = function()
+      require("config.hlslens")
+    end,
+  },
+  {
+    "Yggdroot/LeaderF",
+    cmd = "Leaderf",
+    build = function()
+      if not vim.g.is_win then
+        vim.cmd(":LeaderfInstallCExtension")
+      end
+    end,
+  },
+  "nvim-lua/plenary.nvim",
+  {
+    "nvim-telescope/telescope.nvim",
+    cmd = "Telescope",
+    dependencies = {
+      "nvim-telescope/telescope-symbols.nvim",
+    },
+  },
+  {
+    "lukas-reineke/headlines.nvim",
+    dependencies = "nvim-treesitter/nvim-treesitter",
+    config = true, -- or `opts = {}`
+  },
+  -- A list of colorscheme plugin you may want to try. Find what suits you.
+  { "navarasu/onedark.nvim", lazy = true },
+  { "sainnhe/edge", lazy = true },
+  { "sainnhe/sonokai", lazy = true },
+  { "sainnhe/gruvbox-material", lazy = true },
+  { "sainnhe/everforest", lazy = true },
+  { "EdenEast/nightfox.nvim", lazy = true },
+  { "catppuccin/nvim", name = "catppuccin", lazy = true },
+  { "olimorris/onedarkpro.nvim", lazy = true },
+  { "marko-cerovac/material.nvim", lazy = true },
+
+  { "nvim-tree/nvim-web-devicons", event = "VeryLazy" },
+
+  {
+    "nvim-lualine/lualine.nvim",
+    event = "VeryLazy",
+    cond = firenvim_not_active,
+    config = function()
+      require("config.statusline")
+    end,
+  },
+
+  {
+    "akinsho/bufferline.nvim",
+    event = { "BufEnter" },
+    cond = firenvim_not_active,
+    config = function()
+      require("config.bufferline")
+    end,
+  },
+
+  -- fancy start screen
+  {
+    "nvimdev/dashboard-nvim",
+    cond = firenvim_not_active,
+    config = function()
+      require("config.dashboard-nvim")
+    end,
+  },
+
+  {
+    "lukas-reineke/indent-blankline.nvim",
+    event = "VeryLazy",
+    main = 'ibl',
+    config = function()
+      require("config.indent-blankline")
+    end,
+  },
+
+  -- Highlight URLs inside vim
+  { "itchyny/vim-highlighturl", event = "VeryLazy" },
+
+  -- notification plugin
+  {
+    "rcarriga/nvim-notify",
+    event = "VeryLazy",
+    config = function()
+      require("config.nvim-notify")
+    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.
+  {
+    "tyru/open-browser.vim",
+    enabled = function()
+      if vim.g.is_win or vim.g.is_mac then
+        return true
+      else
+        return false
+      end
+    end,
+    event = "VeryLazy",
+  },
+
+  -- Only install these plugins if ctags are installed on the system
+  -- show file tags in vim window
+  {
+    "liuchengxu/vista.vim",
+    enabled = function()
+      if utils.executable("ctags") then
+        return true
+      else
+        return false
+      end
+    end,
+    cmd = "Vista",
+  },
+
+  -- Snippet engine and snippet template
+  { "SirVer/ultisnips", dependencies = {
+    "honza/vim-snippets",
+  }, event = "InsertEnter" },
+
+  -- Automatic insertion and deletion of a pair of characters
+  {
+      'windwp/nvim-autopairs',
+      event = "InsertEnter",
+      config = true
+  },
+
+  -- Comment plugin
+  { "tpope/vim-commentary", event = "VeryLazy" },
+
+  -- Multiple cursor plugin like Sublime Text?
+  -- 'mg979/vim-visual-multi'
+
+  -- Autosave files on certain events
+  { "907th/vim-auto-save", event = "InsertEnter" },
+
+  -- Show undo history visually
+  { "simnalamburt/vim-mundo", cmd = { "MundoToggle", "MundoShow" } },
+
+  -- better UI for some nvim actions
+  { "stevearc/dressing.nvim" },
+
+  -- Manage your yank history
+  {
+    "gbprod/yanky.nvim",
+    cmd = { "YankyRingHistory" },
+    config = function()
+      require("config.yanky")
+    end,
+  },
+
+  -- Handy unix command inside Vim (Rename, Move etc.)
+  { "tpope/vim-eunuch", cmd = { "Rename", "Delete" } },
+
+  -- Repeat vim motions
+  { "tpope/vim-repeat", event = "VeryLazy" },
+
+  { "nvim-zh/better-escape.vim", event = { "InsertEnter" } },
+
+  {
+    "lyokha/vim-xkbswitch",
+    enabled = function()
+      if vim.g.is_mac and utils.executable("xkbswitch") then
+        return true
+      end
+      return false
+    end,
+    event = { "InsertEnter" },
+  },
+
+  {
+    "Neur1n/neuims",
+    enabled = function()
+      if vim.g.is_win then
+        return true
+      end
+      return false
+    end,
+    event = { "InsertEnter" },
+  },
+
+  -- Auto format tools
+  { "sbdchd/neoformat", cmd = { "Neoformat" } },
+
+  -- Git command inside vim
+  {
+    "tpope/vim-fugitive",
+    event = "User InGitRepo",
+    config = function()
+      require("config.fugitive")
+    end,
+  },
+
+  -- Better git log display
+  { "rbong/vim-flog", cmd = { "Flog" } },
+  { "akinsho/git-conflict.nvim", version = "*", config = true },
+  {
+    "ruifm/gitlinker.nvim",
+    event = "User InGitRepo",
+    config = function()
+      require("config.git-linker")
+    end,
+  },
+
+  -- Show git change (change, delete, add) signs in vim sign column
+  {
+    "lewis6991/gitsigns.nvim",
+    config = function()
+      require("config.gitsigns")
+    end,
+  },
+
+  -- Better git commit experience
+  { "rhysd/committia.vim", lazy = true },
+
+  {
+    "sindrets/diffview.nvim"
+  },
+
+  {
+    "kevinhwang91/nvim-bqf",
+    ft = "qf",
+    config = function()
+      require("config.bqf")
+    end,
+  },
+
+  -- Another markdown plugin
+  { "preservim/vim-markdown", ft = { "markdown" } },
+
+  -- Faster footnote generation
+  { "vim-pandoc/vim-markdownfootnotes", ft = { "markdown" } },
+
+  -- Vim tabular plugin for manipulate tabular, required by markdown plugins
+  { "godlygeek/tabular", cmd = { "Tabularize" } },
+
+  -- Markdown previewing (only for Mac and Windows)
+  {
+    "iamcco/markdown-preview.nvim",
+    enabled = function()
+      if vim.g.is_win or vim.g.is_mac then
+        return true
+      end
+      return false
+    end,
+    build = "cd app && npm install",
+    ft = { "markdown" },
+  },
+
+  {
+    "folke/zen-mode.nvim",
+    cmd = "ZenMode",
+    config = function()
+      require("config.zen-mode")
+    end,
+  },
+
+  {
+    "rhysd/vim-grammarous",
+    enabled = function()
+      if vim.g.is_mac then
+        return true
+      end
+      return false
+    end,
+    ft = { "markdown" },
+  },
+
+  { "chrisbra/unicode.vim", event = "VeryLazy" },
+
+  -- Additional powerful text object for vim, this plugin should be studied
+  -- carefully to use its full power
+  { "wellle/targets.vim", event = "VeryLazy" },
+
+  -- Plugin to manipulate character pairs quickly
+  { "machakann/vim-sandwich", event = "VeryLazy" },
+
+  -- Add indent object for vim (useful for languages like Python)
+  { "michaeljsmith/vim-indent-object", event = "VeryLazy" },
+
+  -- Only use these plugin on Windows and Mac and when LaTeX is installed
+  {
+    "lervag/vimtex",
+    enabled = function()
+      if utils.executable("latex") then
+        return true
+      end
+      return false
+    end,
+    ft = { "tex" },
+  },
+
+  -- Since tmux is only available on Linux and Mac, we only enable these plugins
+  -- for Linux and Mac
+  -- .tmux.conf syntax highlighting and setting check
+  {
+    "tmux-plugins/vim-tmux",
+    enabled = function()
+      if utils.executable("tmux") then
+        return true
+      end
+      return false
+    end,
+    ft = { "tmux" },
+  },
+
+  -- Modern matchit implementation
+  { "andymass/vim-matchup", event = "BufRead" },
+  { "tpope/vim-scriptease", cmd = { "Scriptnames", "Message", "Verbose" } },
+
+  -- Asynchronous command execution
+  { "skywind3000/asyncrun.vim", lazy = true, cmd = { "AsyncRun" } },
+  { "cespare/vim-toml", ft = { "toml" }, branch = "main" },
+
+  -- Edit text area in browser using nvim
+  {
+    "glacambre/firenvim",
+    enabled = function()
+      if vim.g.is_win or vim.g.is_mac then
+        return true
+      end
+      return false
+    end,
+    build = function()
+      vim.fn["firenvim#install"](0)
+    end,
+    lazy = true,
+  },
+
+  -- Debugger plugin
+  {
+    "sakhnik/nvim-gdb",
+    enabled = function()
+      if vim.g.is_win or vim.g.is_linux then
+        return true
+      end
+      return false
+    end,
+    build = { "bash install.sh" },
+    lazy = true,
+  },
+
+  -- Session management plugin
+  { "tpope/vim-obsession", cmd = "Obsession" },
+
+  {
+    "ojroques/vim-oscyank",
+    enabled = function()
+      if vim.g.is_linux then
+        return true
+      end
+      return false
+    end,
+    cmd = { "OSCYank", "OSCYankReg" },
+  },
+
+  -- The missing auto-completion for cmdline!
+  {
+    "gelguy/wilder.nvim",
+    build = ":UpdateRemotePlugins",
+  },
+
+  -- showing keybindings
+  {
+    "folke/which-key.nvim",
+    event = "VeryLazy",
+    config = function()
+      require("config.which-key")
+    end,
+  },
+
+  -- show and trim trailing whitespaces
+  { "jdhao/whitespace.nvim", event = "VeryLazy" },
+
+  -- file explorer
+  {
+    "nvim-tree/nvim-tree.lua",
+    keys = { "<space>s" },
+    dependencies = { "nvim-tree/nvim-web-devicons" },
+    config = function()
+      require("config.nvim-tree")
+    end,
+  },
+
+  {
+    "j-hui/fidget.nvim",
+    event = "VeryLazy",
+    tag = "legacy",
+    config = function()
+      require("config.fidget-nvim")
+    end,
+  },
+}
+
+-- configuration for lazy itself.
+local lazy_opts = {
+  ui = {
+    border = "rounded",
+    title = "Plugin Manager",
+    title_pos = "center",
+  },
+}
+
+require("lazy").setup(plugin_specs, lazy_opts)

lua/plugins.lua

@@ -1,369 +0,0 @@
-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"
-
-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)
-
--- Auto-install packer in case it hasn't been installed.
-if fn.glob(packer_install_dir) == "" then
-  vim.api.nvim_echo({ { "Installing packer.nvim", "Type" } }, true, {})
-  vim.cmd(install_cmd)
-end
-
--- Load packer.nvim
-vim.cmd("packadd packer.nvim")
-local util = require('packer.util')
-
-require("packer").startup({
-  function(use)
-    -- it is recommened to put impatient.nvim before any other plugins
-    use {'lewis6991/impatient.nvim', config = [[require('impatient')]]}
-
-    use({"wbthomason/packer.nvim", opt = true})
-
-    use({"onsails/lspkind-nvim", event = "VimEnter"})
-    -- auto-completion engine
-    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-omni", after = "nvim-cmp" }
-
-    -- use {"hrsh7th/cmp-cmdline", after = "nvim-cmp"}
-    use {"quangnguyen30192/cmp-nvim-ultisnips", after = {'nvim-cmp', 'ultisnips'}}
-    if vim.g.is_mac then
-      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')]] })
-
-    if vim.g.is_mac then
-      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" } })
-
-    -- Python-related text object
-    use({ "jeetsukumaran/vim-pythonsense", ft = { "python" } })
-
-    use({"machakann/vim-swap", event = "VimEnter"})
-
-    -- IDE for Lisp
-    if utils.executable("sbcl") then
-      -- use 'kovisoft/slimv'
-      use({ "vlime/vlime", rtp = "vim/", ft = { "lisp" } })
-    end
-
-    -- Super fast buffer jump
-    use {
-      'phaazon/hop.nvim',
-      event = "VimEnter",
-      config = function()
-        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')]]
-    }
-
-    -- Stay after pressing * and search selected text
-    use({"haya14busa/vim-asterisk", event = 'VimEnter'})
-
-    -- File search, tag search and more
-    if vim.g.is_win then
-      use({"Yggdroot/LeaderF", cmd = "Leaderf"})
-    else
-      use({ "Yggdroot/LeaderF", cmd = "Leaderf", run = ":LeaderfInstallCExtension" })
-    end
-
-    use {
-      '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)'}}
-
-    -- 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})
-
-    -- 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 {
-      'nvim-lualine/lualine.nvim',
-      event = 'VimEnter',
-      config = [[require('config.statusline')]]
-    }
-
-    use({ "akinsho/bufferline.nvim", event = "VimEnter", config = [[require('config.bufferline')]] })
-
-    -- fancy start screen
-    use { 'goolord/alpha-nvim', event = 'VimEnter', config = [[require('config.alpha-nvim')]] }
-
-    use({
-      "lukas-reineke/indent-blankline.nvim",
-      event = 'VimEnter',
-      config = [[require('config.indent-blankline')]]
-    })
-
-    -- Highlight URLs inside vim
-    use({"itchyny/vim-highlighturl", event = "VimEnter"})
-
-    -- notification plugin
-    use({
-      "rcarriga/nvim-notify",
-      event = "BufEnter",
-      config = function()
-        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"})
-    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"})
-    end
-
-    -- Snippet engine and snippet template
-    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"})
-
-    -- Comment plugin
-    use({"tpope/vim-commentary", event = "VimEnter"})
-
-    -- Multiple cursor plugin like Sublime Text?
-    -- use 'mg979/vim-visual-multi'
-
-    -- Autosave files on certain events
-    use({
-      "Pocco81/AutoSave.nvim",
-      event = "VimEnter",
-      config = function()
-        vim.defer_fn(function() require('config.autosave') end, 1500)
-      end
-    })
-
-    -- Show undo history visually
-    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"})
-    end
-
-    -- Handy unix command inside Vim (Rename, Move etc.)
-    use({"tpope/vim-eunuch", cmd = {"Rename", "Delete"}})
-
-    -- Repeat vim motions
-    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" } })
-
-    if vim.g.is_mac then
-      use({ "lyokha/vim-xkbswitch", event = { "InsertEnter" } })
-    elseif vim.g.is_win then
-      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'
-
-    -- Git command inside vim
-    use({ "tpope/vim-fugitive", event = "User InGitRepo" })
-
-    -- Better git log display
-    use({ "rbong/vim-flog", requires = "tpope/vim-fugitive", cmd = { "Flog" } })
-
-    use({ "christoomey/vim-conflicted", requires = "tpope/vim-fugitive", cmd = {"Conflicted"}})
-
-    use({ "kevinhwang91/nvim-bqf", ft = "qf", config = [[require('config.bqf')]] })
-
-    -- Better git commit experience
-    use({"rhysd/committia.vim", opt = true, setup = [[vim.cmd('packadd committia.vim')]]})
-
-    -- Another markdown plugin
-    use({ "plasticboy/vim-markdown", ft = { "markdown" } })
-
-    -- Faster footnote generation
-    use({ "vim-pandoc/vim-markdownfootnotes", ft = { "markdown" } })
-
-    -- Vim tabular plugin for manipulate tabular, required by markdown plugins
-    use({ "godlygeek/tabular", cmd = { "Tabularize" } })
-
-    -- Markdown JSON header highlight plugin
-    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({
-        "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')]]})
-
-    if vim.g.is_mac then
-      use({ "rhysd/vim-grammarous", ft = { "markdown" } })
-    end
-
-    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"})
-
-    -- Plugin to manipulate character pairs quickly
-    -- use 'tpope/vim-surround'
-    use({"machakann/vim-sandwich", event = "VimEnter"})
-
-    -- Add indent object for vim (useful for languages like Python)
-    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'
-    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" } })
-    end
-
-    -- Modern matchit implementation
-    use({"andymass/vim-matchup", event = "VimEnter"})
-
-    -- Smoothie motions
-    -- use 'psliwka/vim-smoothie'
-    use({
-      "karb94/neoscroll.nvim",
-      event = "VimEnter",
-      config = function()
-        vim.defer_fn(function() require('config.neoscroll') end, 2000)
-      end
-    })
-
-    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({ "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({
-        "glacambre/firenvim",
-        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')]] })
-    end
-
-    -- Session management plugin
-    use({"tpope/vim-obsession", cmd = 'Obsession'})
-
-    if vim.g.is_linux then
-      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')]]})
-
-    -- showing keybindings
-    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'}
-
-    -- file explorer
-    use {
-      'kyazdani42/nvim-tree.lua',
-      requires = { 'kyazdani42/nvim-web-devicons' },
-      config = [[require('config.nvim-tree')]]
-    }
-  end,
-  config = {
-    max_jobs = 16,
-    compile_path = util.join_paths(vim.fn.stdpath('config'), '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!")
-end

lua/utils.lua

@@ -1,27 +1,59 @@
--- inspect something
--- Taken from https://github.com/jamestthompson3/vimConfig/blob/eeef4a8eeb5a24938f8a0969a35f69c78643fb66/lua/tt/nvim_utils.lua#L106
-function inspect(item)
-  print(vim.inspect(item))
-end
+local fn = vim.fn
 
 local M = {}
 
 function M.executable(name)
-  if vim.fn.executable(name) > 0 then
+  if fn.executable(name) > 0 then
     return true
   end
 
   return false
 end
 
-function M.may_create_dir()
-  local fpath = vim.fn.expand('<afile>')
-  local parent_dir = vim.fn.fnamemodify(fpath, ":p:h")
-  local res = vim.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
-    vim.fn.mkdir(parent_dir, 'p')
+    fn.mkdir(dir, "p")
   end
 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/python.snippets

@@ -24,3 +24,7 @@ def main():
 if __name__ == "__main__":
 	main()
 endsnippet
+
+snippet sol "solution" b
+solution = Solution()
+endsnippet

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}

plugin/abbrev.vim

@@ -0,0 +1,3 @@
+" some abbreviations
+iabbrev reqire require
+iabbrev serveral several

plugin/command.vim

@@ -8,3 +8,43 @@ call utils#Cabbrev('man', 'Man')
 
 " show current date and time in human readable format
 command! -nargs=? Datetime echo utils#iso_time(<q-args>)
+
+" Convert Markdown file to PDF
+command! ToPDF call s:md_to_pdf()
+
+function! s:md_to_pdf() abort
+  " check if pandoc is installed
+  if executable('pandoc') != 1
+    echoerr "pandoc not found"
+    return
+  endif
+
+  let l:md_path = expand("%:p")
+  let l:pdf_path = fnamemodify(l:md_path, ":r") .. ".pdf"
+
+  let l:header_path = stdpath('config') . '/resources/head.tex'
+
+  let l:cmd = "pandoc --pdf-engine=xelatex --highlight-style=zenburn --table-of-content " .
+        \ "--include-in-header=" . l:header_path . " -V fontsize=10pt -V colorlinks -V toccolor=NavyBlue " .
+        \ "-V linkcolor=red -V urlcolor=teal -V filecolor=magenta -s " .
+        \ l:md_path . " -o " . l:pdf_path
+
+  if g:is_mac
+    let l:cmd = l:cmd . '&& open ' . l:pdf_path
+  endif
+
+  if g:is_win
+    let l:cmd = l:cmd . '&& start ' . l:pdf_path
+  endif
+
+  " echomsg l:cmd
+
+  let l:id = jobstart(l:cmd)
+
+  if l:id == 0 || l:id == -1
+    echoerr "Error running command"
+  endif
+endfunction
+
+" json format
+command! -range JSONFormat <line1>,<line2>!python -m json.tool

resources/head.tex

@@ -0,0 +1,78 @@
+\usepackage{fancyvrb,newverbs}
+\usepackage[top=2cm, bottom=1.5cm, left=2cm, right=2cm]{geometry}
+
+\PassOptionsToPackage{dvipsnames,svgnames,x11names}{xcolor}
+\usepackage{hyperref}
+
+% begin a new page for each section (first level header),
+% we need to combine this with `-V subparagraph` when invoking pandc
+% \usepackage{titlesec}
+% \newcommand{\sectionbreak}{\clearpage}
+
+% change background color for inline code in markdown files.
+% The following code does not work well for long text, because the text will exceed the page boundary.
+\definecolor{bgcolor}{HTML}{DADADA}
+\let\oldtexttt\texttt
+
+\renewcommand{\texttt}[1]{
+  \colorbox{bgcolor}{\oldtexttt{#1}}
+}
+
+% change style of quote, see also https://tex.stackexchange.com/a/436253/114857
+\usepackage[most]{tcolorbox}
+
+\definecolor{linequote}{RGB}{224,215,188}
+\definecolor{backquote}{RGB}{249,245,233}
+\definecolor{bordercolor}{RGB}{221,221,221}
+
+% change left border: https://tex.stackexchange.com/a/475716/114857
+% change left margin: https://tex.stackexchange.com/a/457936/114857
+\newtcolorbox{myquote}[1][]{%
+    enhanced,
+    breakable,
+    size=minimal,
+    left=10pt,
+    top=5pt,
+    bottom=5pt,
+    frame hidden,
+    boxrule=0pt,
+    sharp corners=all,
+    colback=backquote,
+    borderline west={2pt}{0pt}{bordercolor},
+    #1
+}
+
+% redefine quote environment to use the myquote environment, see https://tex.stackexchange.com/a/337587/114857
+\renewenvironment{quote}{\begin{myquote}}{\end{myquote}}
+
+% start a new page after toc, we need to save the old command before defining
+% new one to avoid recursive command calls,
+% see https://tex.stackexchange.com/questions/47351/can-i-redefine-a-command-to-contain-itself
+\let\oldtoc\tableofcontents
+\renewcommand{\tableofcontents}{\oldtoc\newpage}
+
+% fix header level issue
+\usepackage{enumitem}
+\setlistdepth{9}
+
+\setlist[itemize,1]{label=$\bullet$}
+\setlist[itemize,2]{label=$\bullet$}
+\setlist[itemize,3]{label=$\bullet$}
+\setlist[itemize,4]{label=$\bullet$}
+\setlist[itemize,5]{label=$\bullet$}
+\setlist[itemize,6]{label=$\bullet$}
+\setlist[itemize,7]{label=$\bullet$}
+\setlist[itemize,8]{label=$\bullet$}
+\setlist[itemize,9]{label=$\bullet$}
+\renewlist{itemize}{itemize}{9}
+
+\setlist[enumerate,1]{label=$\arabic*.$}
+\setlist[enumerate,2]{label=$\alph*.$}
+\setlist[enumerate,3]{label=$\roman*.$}
+\setlist[enumerate,4]{label=$\arabic*.$}
+\setlist[enumerate,5]{label=$\alpha*$}
+\setlist[enumerate,6]{label=$\roman*.$}
+\setlist[enumerate,7]{label=$\arabic*.$}
+\setlist[enumerate,8]{label=$\alph*.$}
+\setlist[enumerate,9]{label=$\roman*.$}
+\renewlist{enumerate}{enumerate}{9}

spell/en.utf-8.add

@@ -194,7 +194,6 @@ wiki
 backticks
 Reddit
 LeaderF
-gruvbox8
 tabpage
 ccls
 cmake
@@ -203,6 +202,8 @@ llvm
 subsampling
 refactor
 colorschemes
+gruvbox8
+gruvbox
 Gruvbox
 monokai
 NeoSolarized
@@ -415,3 +416,54 @@ src
 RGBA
 yapf
 Vimming
+overfitting
+PCA
+SVM
+KNN
+leetcode
+Logitech
+WTF
+tensorboard
+Nvidia
+GPG
+manpage
+metatable
+open3d
+pyntcloud
+param
+reddit
+viml
+PostgreSQL
+CNY
+wechat
+ziroom
+Postgres
+plpgsql
+postgres
+PySpark
+winbar
+cmdline
+shada
+async
+localhost
+JetBrains
+localhost
+MariaDB
+SQLite
+Pgadmin
+Datagrip
+mysql
+cwd
+pyright
+stubgen
+pylance
+variadic
+Vimium
+Databricks
+Jira
+databricks
+FastAPI
+pylintrc
+PYTHONPATH
+Uvicorn
+qpdf

viml_conf/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")

viml_conf/options.vim

@@ -1,11 +1,7 @@
 scriptencoding utf-8
 
 " change fillchars for folding, vertical split, end of buffer, and message separator
-set fillchars=fold:\ ,vert:\│,eob:\ ,msgsep:‾
-
-" Paste mode toggle, it seems that Nvim's bracketed paste mode
-" does not work very well for nvim-qt, so we use good-old paste mode
-set pastetoggle=<F12>
+set fillchars=fold:\ ,vert:\│,eob:\ ,msgsep:‾,diff:╱
 
 " Split window below/right when creating horizontal/vertical windows
 set splitbelow splitright
@@ -44,9 +40,9 @@ set backup  " create backup for files
 set backupcopy=yes  " copy the original file to backupdir and overwrite it
 
 " General tab settings
-set tabstop=4       " number of visual spaces per TAB
-set softtabstop=4   " number of spaces in tab when editing
-set shiftwidth=4    " number of spaces to use for autoindent
+set tabstop=2       " number of visual spaces per TAB
+set softtabstop=2   " number of spaces in tab when editing
+set shiftwidth=2    " number of spaces to use for autoindent
 set expandtab       " expand tab to spaces so that tabs are spaces
 
 " Set matching pairs of characters and highlight matching brackets
@@ -75,6 +71,7 @@ set scrolloff=3
 " Use mouse to select and resize windows, etc.
 set mouse=nic  " Enable mouse in several mode
 set mousemodel=popup  " Set the behaviour of mouse
+set mousescroll=ver:1,hor:0
 
 " Disable showing current mode on command line since statusline plugins can show it.
 set noshowmode
@@ -112,6 +109,9 @@ set shortmess+=c
 " choice, IMHO.
 set shortmess+=S
 
+" Disable showing intro message (:intro)
+set shortmess+=I
+
 " Completion behaviour
 " set completeopt+=noinsert  " Auto select the first completion entry
 set completeopt+=menuone  " Show menu even if there is only one item
@@ -120,7 +120,7 @@ set completeopt-=preview  " Disable the preview window
 set pumheight=10  " Maximum number of items to show in popup menu
 set pumblend=10  " pseudo transparency for completion menu
 
-set winblend=5  " pseudo transparency for floating window
+set winblend=0  " pseudo transparency for floating window
 
 " Insert mode key word completion setting
 set complete+=kspell complete-=w complete-=b complete-=u complete-=t
@@ -141,7 +141,7 @@ set formatoptions+=mM
 " Tilde (~) is an operator, thus must be followed by motions like `e` or `w`.
 set tildeop
 
-set synmaxcol=200  " Text after this column number is not highlighted
+set synmaxcol=250  " Text after this column number is not highlighted
 set nostartofline
 
 " External program to use for grep command
@@ -159,7 +159,7 @@ set termguicolors
 " https://github.com/neovim/neovim/wiki/FAQ#how-to-change-cursor-color-in-the-terminal
 set guicursor=n-v-c:block-Cursor/lCursor,i-ci-ve:ver25-Cursor2/lCursor2,r-cr:hor20,o:hor20
 
-set signcolumn=auto:2
+set signcolumn=yes:1
 
 " Remove certain character from file name pattern matching
 set isfname-==
@@ -172,5 +172,7 @@ set diffopt+=filler  " show filler for deleted lines
 set diffopt+=closeoff  " turn off diff when one file window is closed
 set diffopt+=context:3  " context for diff
 set diffopt+=internal,indent-heuristic,algorithm:histogram
+set diffopt+=linematch:60
 
 set nowrap  " do no wrap
+set noruler

viml_conf/plugins.vim

@@ -1,16 +1,16 @@
 scriptencoding utf-8
 
 " Plugin specification and lua stuff
-lua require('lua-init')
+lua require('plugin_specs')
 
 " Use short names for common plugin manager commands to simplify typing.
 " To use these shortcuts: first activate command line with `:`, then input the
 " short alias, e.g., `pi`, then press <space>, the alias will be expanded to
 " the full command automatically.
-call utils#Cabbrev('pi', 'PackerInstall')
-call utils#Cabbrev('pud', 'PackerUpdate')
-call utils#Cabbrev('pc', 'PackerClean')
-call utils#Cabbrev('ps', 'PackerSync')
+call utils#Cabbrev('pi', 'Lazy install')
+call utils#Cabbrev('pud', 'Lazy update')
+call utils#Cabbrev('pc', 'Lazy clean')
+call utils#Cabbrev('ps', 'Lazy sync')
 
 """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 "                      configurations for vim script plugin                  "
@@ -42,7 +42,7 @@ let g:Lf_UseMemoryCache = 0
 
 " Ignore certain files and directories when searching files
 let g:Lf_WildIgnore = {
-  \ 'dir': ['.git', '__pycache__', '.DS_Store'],
+  \ 'dir': ['.git', '__pycache__', '.DS_Store', '*_cache'],
   \ 'file': ['*.exe', '*.dll', '*.so', '*.o', '*.pyc', '*.jpg', '*.png',
   \ '*.gif', '*.svg', '*.ico', '*.db', '*.tgz', '*.tar.gz', '*.gz',
   \ '*.zip', '*.bin', '*.pptx', '*.xlsx', '*.docx', '*.pdf', '*.tmp',
@@ -101,7 +101,7 @@ nnoremap <silent> <leader>ft :<C-U>Leaderf bufTag --popup<CR>
 nnoremap <silent> <leader>fb :<C-U>Leaderf buffer --popup<CR>
 
 " Search recent files
-nnoremap <silent> <leader>fr :<C-U>Leaderf mru --popup<CR>
+nnoremap <silent> <leader>fr :<C-U>Leaderf mru --popup --absolute-path<CR>
 
 let g:Lf_PopupColorscheme = 'gruvbox_material'
 
@@ -109,6 +109,20 @@ let g:Lf_PopupColorscheme = 'gruvbox_material'
 " items.
 let g:Lf_CommandMap = {'<C-J>': ['<C-N>'], '<C-K>': ['<C-P>']}
 
+" do not preview results, it will add the file to buffer list
+let g:Lf_PreviewResult = {
+      \ 'File': 0,
+      \ 'Buffer': 0,
+      \ 'Mru': 0,
+      \ 'Tag': 0,
+      \ 'BufTag': 1,
+      \ 'Function': 1,
+      \ 'Line': 0,
+      \ 'Colorscheme': 0,
+      \ 'Rg': 0,
+      \ 'Gtags': 0
+      \}
+
 """"""""""""""""""""""""""""open-browser.vim settings"""""""""""""""""""
 if g:is_win || g:is_mac
   " Disable netrw's gx mapping.
@@ -137,31 +151,6 @@ let g:mundo_width = 80
 
 nnoremap <silent> <Space>u :MundoToggle<CR>
 
-""""""""""""""""""""""""""""vim-yoink settings"""""""""""""""""""""""""
-if g:is_win || g:is_mac
-  " ctrl-n and ctrl-p will not work if you add the TextChanged event to vim-auto-save events.
-  " nmap <c-n> <plug>(YoinkPostPasteSwapBack)
-  " nmap <c-p> <plug>(YoinkPostPasteSwapForward)
-
-  " The following p/P mappings are also needed for ctrl-n and ctrl-p to work
-  " nmap p <plug>(YoinkPaste_p)
-  " nmap P <plug>(YoinkPaste_P)
-
-  " Cycle the yank stack with the following mappings
-  nmap [y <plug>(YoinkRotateBack)
-  nmap ]y <plug>(YoinkRotateForward)
-
-  " Do not change the cursor position
-  nmap y <plug>(YoinkYankPreserveCursorPosition)
-  xmap y <plug>(YoinkYankPreserveCursorPosition)
-
-  " Move cursor to end of paste after multiline paste
-  let g:yoinkMoveCursorToEndOfPaste = 0
-
-  " Record yanks in system clipboard
-  let g:yoinkSyncSystemClipboardOnFocus = 1
-endif
-
 """"""""""""""""""""""""""""better-escape.vim settings"""""""""""""""""""""""""
 let g:better_escape_interval = 200
 
@@ -182,23 +171,7 @@ let g:neoformat_c_clangformat = {
 let g:neoformat_enabled_cpp = ['clangformat']
 let g:neoformat_enabled_c = ['clangformat']
 
-"""""""""""""""""""""""""vim-signify settings""""""""""""""""""""""""""""""
-" The VCS to use
-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"""""""""""""""""""
+"""""""""""""""""""""""""vim-markdown settings"""""""""""""""""""
 " Disable header folding
 let g:vim_markdown_folding_disabled = 1
 
@@ -259,8 +232,8 @@ nmap s <Nop>
 omap s <Nop>
 
 """"""""""""""""""""""""""""vimtex settings"""""""""""""""""""""""""""""
-if ( g:is_win || g:is_mac ) && executable('latex')
-  " Hacks for inverse serach to work semi-automatically,
+if executable('latex')
+  " 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'
@@ -292,7 +265,6 @@ if ( g:is_win || g:is_mac ) && executable('latex')
   " Viewer settings for different platforms
   if g:is_win
     let g:vimtex_view_general_viewer = 'SumatraPDF'
-    let g:vimtex_view_general_options_latexmk = '-reuse-instance'
     let g:vimtex_view_general_options = '-reuse-instance -forward-search @tex @line @pdf'
   endif
 
@@ -321,11 +293,6 @@ if ( g:is_win || g:is_mac ) && executable('latex')
   endif
 endif
 
-""""""""""""""""""""""""""""vim-startify settings""""""""""""""""""""""""""""
-" Do not change working directory when opening files.
-let g:startify_change_to_dir = 0
-let g:startify_fortune_use_unicode = 1
-
 """"""""""""""""""""""""""""vim-matchup settings"""""""""""""""""""""""""""""
 " Improve performance
 let g:matchup_matchparen_deferred = 1
@@ -372,9 +339,20 @@ if exists('g:started_by_firenvim') && g:started_by_firenvim
       \ }
   \ }
 
+  function s:setup_firenvim() abort
+    set signcolumn=no
+    set noruler
+    set noshowcmd
+    set laststatus=0
+    set showtabline=0
+  endfunction
+
   augroup firenvim
     autocmd!
-    autocmd BufEnter *.txt setlocal filetype=markdown laststatus=0 nonumber noshowcmd noruler showtabline=1
+    autocmd BufEnter * call s:setup_firenvim()
+    autocmd BufEnter sqlzoo*.txt set filetype=sql
+    autocmd BufEnter github.com_*.txt set filetype=markdown
+    autocmd BufEnter stackoverflow.com_*.txt set filetype=markdown
   augroup END
 endif
 
@@ -423,6 +401,9 @@ function! s:wilder_init() abort
           \ 'apply_incsearch_fix': 0,
           \ }))
   catch /^Vim\%((\a\+)\)\=:E117/
-    echohl Error |echomsg "Wilder.nvim missing: run :PackerSync to fix."|echohl None
+    echohl Error |echomsg "Wilder.nvim missing"| echohl None
   endtry
 endfunction
+
+""""""""""""""""""""""""""""""vim-auto-save settings""""""""""""""""""""""""""""""
+let g:auto_save = 1  " enable AutoSave on Vim startup