neovim: refactor: split init.lua

8 files changed, 1096 insertions, 1122 deletions

diff --git a/.config/nvim/init.lua b/.config/nvim/init.lua
index 4905742..487befc 100644
--- a/.config/nvim/init.lua
+++ b/.config/nvim/init.lua
@@ -1,1122 +1,17 @@
---[========================================================================[--
---                                                                          --
---                 _                __  _       _ _     _                   --
---      _ ____   _(_)_ __ ___      / / (_)_ __ (_) |_  | |_   _  __ _       --
---     | '_ \ \ / / | '_ ` _ \    / /  | | '_ \| | __| | | | | |/ _` |      --
---     | | | \ V /| | | | | | |  / /   | | | | | | |_ _| | |_| | (_| |      --
---     |_| |_|\_/ |_|_| |_| |_| /_/    |_|_| |_|_|\__(_)_|\__,_|\__,_|      --
---                                                                          --
---]========================================================================]--
-
-
-
--- Global settings {{{1
-
--- Aliases {{{2
-
-local F = vim.fn
-local G = vim.g
-local O = vim.o
-local OPT = vim.opt
-
-local uniquify = require('uniquify')
-local vimrc = require('vimrc')
-_G.vimrc = vimrc
-
-
-
--- Environment {{{2
-
-local my_env = require('vimrc.my_env')
-my_env.mkdir()
-
-
-
--- The augroup used in .vimrc {{{2
-
-vimrc.create_augroup_for_vimrc()
-
-
-
--- Language {{{2
-
--- Disable L10N.
-vim.cmd('language messages C')
-vim.cmd('language time C')
-
-
-
-
--- Options {{{1
-
--- Moving around, searching and patterns {{{2
-
-O.wrapscan = false
-O.ignorecase = true
-O.smartcase = true
-
-
--- Displaying text {{{2
-
-O.scrolloff = 7
-O.linebreak = true
-O.breakindent = true
-OPT.breakindentopt:append('sbr')
-O.showbreak = '> '
-O.sidescrolloff = 20
-OPT.fillchars = {
-   vert = ' ',
-   fold = ' ',
-   diff = ' ',
-}
-O.cmdheight = 1
-O.list = true
-OPT.listchars = {
-   eol = '\xc2\xac', -- u00ac
-   tab = '\xe2\x96\xb8 ', -- u25b8
-   trail = '\xc2\xb7', -- u00b7
-   extends = '\xc2\xbb', -- u00bb
-   precedes = '\xc2\xab', -- u00ab
-}
-O.concealcursor = 'cnv'
-
-
--- Syntax, highlighting and spelling {{{2
-
-O.background = 'dark'
-O.synmaxcol = 500
-O.hlsearch = true
-O.termguicolors = true
-O.colorcolumn = '+1'
-
-
--- Multiple windows {{{2
-
-O.winminheight = 0
-O.hidden = true
-O.switchbuf = 'usetab'
-
-
--- Multiple tabpages {{{2
-
-O.showtabline = 2
-
-
--- Terminal {{{2
-
-O.title = false
-
-
--- Using the mouse {{{2
-
-O.mouse = ''
-
-
--- Messages and info {{{2
-
-OPT.shortmess:append('asIc')
-O.showmode = false
-O.report = 999
-O.confirm = true
-
-
--- Selecting text {{{2
-
-O.clipboard = 'unnamed'
-
-
--- Editing text {{{2
-
-O.undofile = true
-O.textwidth = 0
-OPT.completeopt:remove('preview')
-O.pumheight = 10
-OPT.matchpairs:append('<:>')
-O.joinspaces = false
-OPT.nrformats:append('unsigned')
-
-
--- Tabs and indenting {{{2
--- Note: you should also set them for each file types.
---       These following settings are used for unknown file types.
-
-O.tabstop = 4
-O.shiftwidth = 4
-O.softtabstop = 4
-O.expandtab = true
-O.smartindent = true
-O.copyindent = true
-O.preserveindent = true
-
-
--- Folding {{{2
-
-O.foldlevelstart = 0
-OPT.foldopen:append('insert')
-O.foldmethod = 'marker'
-
-
--- Diff mode {{{2
-
-OPT.diffopt:append('vertical')
-OPT.diffopt:append('foldcolumn:3')
-
-
--- Mapping {{{2
-
-O.maxmapdepth = 10
-O.timeout = false
-
-
--- Reading and writing files {{{2
-
-O.fixendofline = false
-O.fileformats = 'unix,dos'
-O.backup = true
-O.backupdir = my_env.backup_dir
-O.autowrite = true
-
-
--- Command line editing {{{2
-
-OPT.wildignore:append('*.o')
-OPT.wildignore:append('*.obj')
-OPT.wildignore:append('*.lib')
-O.wildignorecase = true
-
-
--- Executing external commands {{{2
-
-O.shell = 'zsh'
-O.keywordprg = ''
-
-
--- Encoding {{{2
-
-O.fileencodings = 'utf-8,cp932,euc-jp'
-
-
--- Misc. {{{2
-
-
--- Autocommands {{{1
-
--- Auto-resize windows when Vim is resized.
-vimrc.autocmd('VimResized', {
-   command = 'wincmd =',
-})
-
-
--- Calculate 'numberwidth' to fit file size.
--- Note: extra 2 is the room of left and right spaces.
-vimrc.autocmd({'BufEnter', 'WinEnter', 'BufWinEnter'}, {
-   callback = function()
-      vim.wo.numberwidth = #tostring(F.line('$')) + 2
-   end,
-})
-
-
--- Jump to the last cursor position when you open a file.
-vimrc.autocmd('BufRead', {
-   callback = function()
-      if 0 < F.line("'\"") and F.line("'\"") <= F.line('$') and
-         not O.filetype:match('commit') and not O.filetype:match('rebase')
-      then
-         vim.cmd('normal g`"')
-      end
-   end,
-})
-
-
--- Lua version of https://github.com/mopp/autodirmake.vim
--- License: NYSL
-vimrc.autocmd('BufWritePre', {
-   callback = function()
-      local dir = F.expand('<afile>:p:h')
-      if F.isdirectory(dir) ~= 0 then
-         return
-      end
-      vimrc.echo(('"%s" does not exist. Create? [y/N] '):format(dir), 'Question')
-      local answer = vimrc.getchar()
-      if answer ~= 'y' and answer ~= 'Y' then
-         return
-      end
-      F.mkdir(dir, 'p')
-   end,
-})
-
-
-vimrc.register_filetype_autocmds_for_indentation()
-
-
-
--- Mappings {{{1
-
--- Note: |:noremap| defines mappings in |Normal|, |Visual|, |Operator-Pending|
--- and |Select| mode. Because I don't use |Select| mode, I use |:noremap|
--- instead of |:nnoremap|, |:xnoremap| and |:onoremap| for simplicity.
-
-
--- Searching {{{2
-
--- Fix direction of n and N.
-vim.keymap.set('', 'n', "v:searchforward ? 'n' : 'N'", { expr=true })
-vim.keymap.set('', 'N', "v:searchforward ? 'N' : 'n'", { expr=true })
-
-vim.keymap.set('', 'gn', "v:searchforward ? 'gn' : 'gN'", { expr=true })
-vim.keymap.set('', 'gN', "v:searchforward ? 'gN' : 'gn'", { expr=true })
-
-vim.keymap.set({'n', 'x'}, '&', '<Cmd>%&&<CR>')
-
-
--- Registers and macros. {{{2
-
--- Access an resister in the same way in Insert and Commandline mode.
-vim.keymap.set({'n', 'x'}, '<C-r>', '"')
-
-F.setreg('j', 'j.')
-F.setreg('k', 'k.')
-F.setreg('n', 'n.')
-F.setreg('m', 'N.')
-vim.keymap.set('n', '@N', '@m')
-
--- Repeat the last executed macro as many times as possible.
--- a => all
-vim.keymap.set('n', '@a', '9999@@')
-
--- Execute the last executed macro again.
-vim.keymap.set('n', '`', '@@')
-
-
--- Emacs like key mappings in Insert and CommandLine mode. {{{2
-
-vim.keymap.set('i', '<C-d>', '<Del>')
-
--- Go elsewhere without dividing the undo history.
-vim.keymap.set('i', '<C-b>', '<C-g>U<Left>')
-vim.keymap.set('i', '<C-f>', '<C-g>U<Right>')
-
--- Delete something deviding the undo history.
-vim.keymap.set('i', '<C-u>', '<C-g>u<C-u>')
-vim.keymap.set('i', '<C-w>', '<C-g>u<C-w>')
-
-vim.keymap.set('c', '<C-a>', '<Home>')
-vim.keymap.set('c', '<C-e>', '<End>')
-vim.keymap.set('c', '<C-f>', '<Right>')
-vim.keymap.set('c', '<C-b>', '<Left>')
-vim.keymap.set('c', '<C-n>', '<Down>')
-vim.keymap.set('c', '<C-p>', '<Up>')
-vim.keymap.set('c', '<C-d>', '<Del>')
-
-vim.keymap.set({'c', 'i'}, '<Left>', '<Nop>')
-vim.keymap.set({'c', 'i'}, '<Right>', '<Nop>')
-
-
-
-vim.keymap.set('n', 'gA', function()
-   local line = F.getline('.')
-   if vim.endswith(line, ';;') then -- for OCaml
-      return 'A<C-g>U<Left><C-g>U<Left>'
-   elseif vim.regex('[,;)]$'):match_str(line) then
-      return 'A<C-g>U<Left>'
-   else
-      return 'A'
-   end
-end, { expr=true, replace_keycodes=true })
-
-
-
--- QuickFix or location list. {{{2
-
-vim.keymap.set('n', 'bb', '<Cmd>cc<CR>')
-
-vim.keymap.set('n', 'bn', ':<C-u><C-r>=v:count1<CR>cnext<CR>', { silent = true })
-vim.keymap.set('n', 'bp', ':<C-u><C-r>=v:count1<CR>cprevious<CR>', { silent = true })
-
-vim.keymap.set('n', 'bf', '<Cmd>cfirst<CR>')
-vim.keymap.set('n', 'bl', '<Cmd>clast<CR>')
-
-vim.keymap.set('n', 'bS', '<Cmd>colder<CR>')
-vim.keymap.set('n', 'bs', '<Cmd>cnewer<CR>')
-
-
-
--- Operators {{{2
-
--- Throw deleted text into the black hole register ("_).
-vim.keymap.set({'n', 'x'}, 'c', '"_c')
-vim.keymap.set({'n', 'x'}, 'C', '"_C')
-
-
-vim.keymap.set('', 'g=', '=')
-
-
-vim.keymap.set('', 'ml', 'gu')
-vim.keymap.set('', 'mu', 'gU')
-
-vim.keymap.set('', 'gu', '<Nop>')
-vim.keymap.set('', 'gU', '<Nop>')
-vim.keymap.set('x', 'u', '<Nop>')
-vim.keymap.set('x', 'U', '<Nop>')
-
-
-vim.keymap.set('x', 'x', '"_x')
-
-
-vim.keymap.set('n', 'Y', 'y$')
--- In Blockwise-Visual mode, select text linewise.
--- By default, select text characterwise, neither blockwise nor linewise.
-vim.keymap.set('x', 'Y', "mode() ==# 'V' ? 'y' : 'Vy'", { expr=true })
-
-
-
--- Swap the keys entering Replace mode and Visual-Replace mode.
-vim.keymap.set('n', 'R', 'gR')
-vim.keymap.set('n', 'gR', 'R')
-vim.keymap.set('n', 'r', 'gr')
-vim.keymap.set('n', 'gr', 'r')
-
-
-vim.keymap.set('n', 'U', '<C-r>')
-
-
-
-
--- Motions {{{2
-
-vim.keymap.set('', 'H', '^')
-vim.keymap.set('', 'L', '$')
-vim.keymap.set('', 'M', '%')
-
-vim.keymap.set('', 'gw', 'b')
-vim.keymap.set('', 'gW', 'B')
-
-vim.keymap.set('', 'k', 'gk')
-vim.keymap.set('', 'j', 'gj')
-vim.keymap.set('', 'gk', 'k')
-vim.keymap.set('', 'gj', 'j')
-
-vim.keymap.set('n', 'gff', 'gF')
-
-
-
--- Tabpages and windows. {{{2
-
-vimrc.fn = {}
-
-function vimrc.fn.move_current_window_to_tabpage()
-   if F.winnr('$') == 1 then
-      -- Leave the current window and open it in a new tabpage.
-      -- Because :wincmd T fails when the current tabpage has only one window.
-      vim.cmd('tab split')
-   else
-      -- Close the current window and re-open it in a new tabpage.
-      vim.cmd('wincmd T')
-   end
-end
-
-
-function vimrc.fn.choose_window_interactively()
-   local indicators = {
-      'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ';',
-      '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
-   }
-
-   -- List normal windows up to 20.
-   local wins = {}
-   for winnr = 1, F.winnr('$') do
-      if winnr ~= F.winnr() and F.win_gettype(winnr) == '' then
-         wins[#wins+1] = F.win_getid(winnr)
-      end
-   end
-   if #indicators < #wins then
-      for i = #indicators+1, #wins do
-         wins[i] = nil
-      end
-   end
-
-   -- Handle special cases.
-   if #wins == 0 then
-      return
-   end
-   if #wins == 1 then
-      if wins[1] == F.win_getid() then
-         F.win_gotoid(wins[2])
-      else
-         F.win_gotoid(wins[1])
-      end
-      return
-   end
-
-   -- Show popups.
-   local popups = {}
-   for i = 1, #wins do
-      local winid = wins[i]
-      local indicator = indicators[i]
-      local buf_id = vim.api.nvim_create_buf(false, true)
-      vim.api.nvim_buf_set_lines(buf_id, 0, -1, true, { '  ' .. indicator .. '  ' })
-      local popup = vim.api.nvim_open_win(
-         buf_id,
-         false,
-         {
-            relative = 'win',
-            win = winid,
-            row = (F.winheight(winid) - 5) / 2,
-            col = (F.winwidth(winid) - 9) / 2,
-            width = 5,
-            height = 1,
-            focusable = false,
-            style = 'minimal',
-            border = 'solid',
-            noautocmd = true,
-         })
-      popups[#popups+1] = {
-         winid = popup,
-         indicator = indicator,
-         target_winid = winid,
-      }
-   end
-
-   -- Prompt
-   local result = vimrc.getchar_with_prompt('Select window: ')
-
-   -- Jump
-   local jump_target = -1
-   for i, popup in ipairs(popups) do
-      if string.upper(result) == popup.indicator then
-         jump_target = popup.target_winid
-      end
-   end
-   if jump_target ~= -1 then
-      F.win_gotoid(jump_target)
-   end
-
-   -- Close popups
-   for i, popup in ipairs(popups) do
-      vim.api.nvim_win_close(popup.winid, true)
-   end
-end
-
-
-vim.keymap.set('n', 'tt', '<Cmd>tabnew<CR>')
-vim.keymap.set('n', 'tT', vimrc.fn.move_current_window_to_tabpage)
-
-vim.keymap.set('n', 'tn', ":<C-u><C-r>=(tabpagenr() + v:count1 - 1) % tabpagenr('$') + 1<CR>tabnext<CR>", { silent=true })
-vim.keymap.set('n', 'tp', ":<C-u><C-r>=(tabpagenr('$') * 10 + tabpagenr() - v:count1 - 1) % tabpagenr('$') + 1<CR>tabnext<CR>", { silent=true })
-
-vim.keymap.set('n', 'tN', '<Cmd>tabmove +<CR>')
-vim.keymap.set('n', 'tP', '<Cmd>tabmove -<CR>')
-
-vim.keymap.set('n', 'tsh', '<Cmd>leftabove vsplit<CR>')
-vim.keymap.set('n', 'tsj', '<Cmd>rightbelow split<CR>')
-vim.keymap.set('n', 'tsk', '<Cmd>leftabove split<CR>')
-vim.keymap.set('n', 'tsl', '<Cmd>rightbelow vsplit<CR>')
-
-vim.keymap.set('n', 'tsH', '<Cmd>topleft vsplit<CR>')
-vim.keymap.set('n', 'tsJ', '<Cmd>botright split<CR>')
-vim.keymap.set('n', 'tsK', '<Cmd>topleft split<CR>')
-vim.keymap.set('n', 'tsL', '<Cmd>botright vsplit<CR>')
-
-vim.keymap.set('n', 'twh', '<Cmd>leftabove vnew<CR>')
-vim.keymap.set('n', 'twj', '<Cmd>rightbelow new<CR>')
-vim.keymap.set('n', 'twk', '<Cmd>leftabove new<CR>')
-vim.keymap.set('n', 'twl', '<Cmd>rightbelow vnew<CR>')
-
-vim.keymap.set('n', 'twH', '<Cmd>topleft vnew<CR>')
-vim.keymap.set('n', 'twJ', '<Cmd>botright new<CR>')
-vim.keymap.set('n', 'twK', '<Cmd>topleft new<CR>')
-vim.keymap.set('n', 'twL', '<Cmd>botright vnew<CR>')
-
-vim.keymap.set('n', 'th', '<C-w>h')
-vim.keymap.set('n', 'tj', '<C-w>j')
-vim.keymap.set('n', 'tk', '<C-w>k')
-vim.keymap.set('n', 'tl', '<C-w>l')
-
-vim.keymap.set('n', 'tH', '<C-w>H')
-vim.keymap.set('n', 'tJ', '<C-w>J')
-vim.keymap.set('n', 'tK', '<C-w>K')
-vim.keymap.set('n', 'tL', '<C-w>L')
-
-vim.keymap.set('n', 'tx', '<C-w>x')
-
--- r => manual resize.
--- R => automatic resize.
-vim.keymap.set('n', 'tRH', '<C-w>_')
-vim.keymap.set('n', 'tRW', '<C-w><Bar>')
-vim.keymap.set('n', 'tRR', '<C-w>_<C-w><Bar>')
-
-vim.keymap.set('n', 't=', '<C-w>=')
-
-vim.keymap.set('n', 'tq', '<Cmd>bdelete<CR>')
-
-vim.keymap.set('n', 'tc', '<C-w>c')
-
-vim.keymap.set('n', 'to', '<C-w>o')
-vim.keymap.set('n', 'tO', '<Cmd>tabonly<CR>')
-
-vim.keymap.set('n', 'tg', vimrc.fn.choose_window_interactively)
-
-
-
-function vimrc.fn.smart_open(command)
-   local modifiers
-   if F.winwidth(F.winnr()) < 150 then
-      modifiers = 'topleft'
-   else
-      modifiers = 'vertical botright'
-   end
-
-   vim.cmd(([[
-   try
-      %s %s
-      let g:__ok = v:true
-   catch
-      echohl Error
-      echo v:exception
-      echohl None
-      let g:__ok = v:false
-   endtry
-   ]]):format(modifiers, command))
-   if not G.__ok then
-      return
-   end
-
-   if O.filetype == 'help' then
-      if vim.bo.textwidth > 0 then
-         vim.cmd(('vertical resize %d'):format(vim.bo.textwidth))
-      end
-      -- Move the cursor to the beginning of the line as help tags are often
-      -- right-justfied.
-      F.cursor(
-         0 --[[ stay in the current line ]],
-         1 --[[ move to the beginning of the line ]])
-   end
-end
-
-vim.api.nvim_create_user_command(
-   'SmartOpen',
-   function(opts) vimrc.fn.smart_open(opts.args) end,
-   {
-      desc = 'Smartly open a new buffer',
-      nargs = '+',
-      complete = 'command',
-   }
-)
-
-
-
-
--- Toggle options {{{2
-
-vim.keymap.set('n', 'T', '<Nop>')
-
-vim.keymap.set('n', 'Ta', '<Cmd>AutosaveToggle<CR>')
-vim.keymap.set('n', 'Tb', ':<C-u>if &background == "dark" <Bar>set background=light <Bar>else <Bar>set background=dark <Bar>endif<CR>', { silent=true })
-vim.keymap.set('n', 'Tc', ':<C-u>set cursorcolumn! <Bar>set cursorline!<CR>', { silent=true })
-vim.keymap.set('n', 'Td', ':<C-u>if &diff <Bar>diffoff <Bar>else <Bar>diffthis <Bar>endif<CR>', { silent=true })
-vim.keymap.set('n', 'Te', '<Cmd>set expandtab!<CR>')
-vim.keymap.set('n', 'Th', '<Cmd>set hlsearch!<CR>')
-vim.keymap.set('n', 'Tn', '<Cmd>set number!<CR>')
-vim.keymap.set('n', 'Ts', '<Cmd>set spell!<CR>')
-vim.keymap.set('n', 'T8', ':<C-u>if &textwidth ==# 80 <Bar>set textwidth=0 <Bar>else <Bar>set textwidth=80 <Bar>endif<CR>', { silent=true })
-vim.keymap.set('n', 'T0', ':<C-u>if &textwidth ==# 100 <Bar>set textwidth=0 <Bar>else <Bar>set textwidth=100 <Bar>endif<CR>', { silent=true })
-vim.keymap.set('n', 'T2', ':<C-u>if &textwidth ==# 120 <Bar>set textwidth=0 <Bar>else <Bar>set textwidth=120 <Bar>endif<CR>', { silent=true })
-vim.keymap.set('n', 'Tw', '<Cmd>set wrap!<CR>')
-
-vim.keymap.set('n', 'TA', 'Ta', { remap=true })
-vim.keymap.set('n', 'TB', 'Tb', { remap=true })
-vim.keymap.set('n', 'TC', 'Tc', { remap=true })
-vim.keymap.set('n', 'TD', 'Td', { remap=true })
-vim.keymap.set('n', 'TE', 'Te', { remap=true })
-vim.keymap.set('n', 'TH', 'Th', { remap=true })
-vim.keymap.set('n', 'TN', 'Tn', { remap=true })
-vim.keymap.set('n', 'TS', 'Ts', { remap=true })
-vim.keymap.set('n', 'TW', 'Tw', { remap=true })
-
-
-
--- Increment/decrement numbers {{{2
-
--- nnoremap  +  <C-a>
--- nnoremap  -  <C-x>
--- xnoremap  +  <C-a>
--- xnoremap  -  <C-x>
--- xnoremap  g+  g<C-a>
--- xnoremap  g-  g<C-x>
-
-
-
--- Open *scratch* buffer {{{2
-
-local EXTENSION_MAPPING = {
-   bash       = 'sh',
-   haskell    = 'hs',
-   javascript = 'js',
-   markdown   = 'md',
-   python     = 'py',
-   ruby       = 'rb',
-   rust       = 'rs',
-   typescript = 'ts',
-   zsh        = 'sh',
-}
-
-local function make_scratch_buffer_name(ft)
-   local now = F.localtime()
-   if ft == '' then
-      ft = 'txt'
-   end
-   local ext = EXTENSION_MAPPING[ft] or ft
-   return my_env.scratch_dir .. '/' .. F.strftime('%Y-%m', now), F.strftime('%Y-%m-%d-%H%M%S'), ext
-end
-
-function vimrc.fn.open_scratch()
-   local ok, ft = pcall(function() return vimrc.input('filetype: ') end)
-   if not ok then
-      vimrc.echo('Canceled', 'ErrorMsg')
-      return
-   end
-   ft = vim.trim(ft)
-   local dir, fname, ext = make_scratch_buffer_name(ft)
-   if F.isdirectory(dir) == 0 then
-      F.mkdir(dir, 'p')
-   end
-   vim.cmd(('SmartTabEdit %s/%s.%s'):format(dir, fname, ext))
-   if vim.bo.filetype ~= ft then
-      vim.cmd('setlocal filetype=' .. ft)
-   end
-   vim.b._scratch_ = true
-   if vim.fn.exists(':AutosaveEnable') == 2 then
-      vim.cmd('AutosaveEnable')
-   end
-end
-
-vim.api.nvim_create_user_command(
-   'Scratch',
-   function() vimrc.fn.open_scratch() end,
-   {
-      desc = 'Open a *scratch* buffer',
-   }
-)
-
-vim.keymap.set('n', '<Space>s', '<Cmd>Scratch<CR>')
-
-
-
--- Disable unuseful or dangerous mappings. {{{2
-
--- Disable Select mode.
-vim.keymap.set('n', 'gh', '<Nop>')
-vim.keymap.set('n', 'gH', '<Nop>')
-vim.keymap.set('n', 'g<C-h>', '<Nop>')
-
--- Disable Ex mode.
-vim.keymap.set('n', 'Q', '<Nop>')
-vim.keymap.set('n', 'gQ', '<Nop>')
-
-vim.keymap.set('n', 'ZZ', '<Nop>')
-vim.keymap.set('n', 'ZQ', '<Nop>')
-
-
--- Help {{{2
-
--- Search help.
-vim.keymap.set('n', '<C-h>', ':<C-u>SmartOpen help<Space>')
-
-
-
--- For writing Vim script. {{{2
-
-vim.keymap.set('n', 'XV', '<Cmd>SmartTabEdit $MYVIMRC<CR>')
-
--- See |numbered-function|.
-vim.keymap.set('n', 'XF', ':<C-u>function {<C-r>=v:count<CR>}<CR>', { silent=true })
-
-vim.keymap.set('n', 'XM', '<Cmd>messages<CR>')
-
-
-
-
-
-
-
--- Abbreviations {{{2
-
-vimrc.iabbrev('TOOD', 'TODO')
-vimrc.iabbrev('retrun', 'return')
-vimrc.iabbrev('reutrn', 'return')
-vimrc.iabbrev('tihs', 'this')
-
-
-vimrc.cabbrev('S', '%s')
-
-
-
--- Misc. {{{2
-
-vim.keymap.set('o', 'gv', ':<C-u>normal! gv<CR>', { silent=true })
-
--- Swap : and ;.
-vim.keymap.set('n', ';', ':')
-vim.keymap.set('n', ':', ';')
-vim.keymap.set('x', ';', ':')
-vim.keymap.set('x', ':', ';')
-vim.keymap.set('n', '@;', '@:')
-vim.keymap.set('x', '@;', '@:')
-vim.keymap.set('!', '<C-r>;', '<C-r>:')
-
-
--- Since <ESC> may be mapped to something else somewhere, it should be :map, not
--- :noremap.
-vim.keymap.set('!', 'jk', '<ESC>', { remap=true })
-
-
-
-vim.keymap.set('n', '<C-c>', ':<C-u>nohlsearch<CR>', { silent=true })
-
-
--- Lua function cannot be set to 'operatorfunc' for now.
-vim.cmd([[
-   function! Vimrc_insert_black_line_below(type = '') abort
-      if a:type ==# ''
-         set operatorfunc=Vimrc_insert_black_line_below
-         return 'g@ '
-      else
-         for i in range(v:count1)
-            call append(line('.'), '')
-         endfor
-      endif
-   endfunction
-   function! Vimrc_insert_black_line_above(type = '') abort
-      if a:type ==# ''
-         set operatorfunc=Vimrc_insert_black_line_above
-         return 'g@ '
-      else
-         for i in range(v:count1)
-            call append(line('.') - 1, '')
-         endfor
-      endif
-   endfunction
-]])
-vim.keymap.set('n', 'go', F.Vimrc_insert_black_line_below, { expr = true })
-vim.keymap.set('n', 'gO', F.Vimrc_insert_black_line_above, { expr = true })
-
-
-vim.keymap.set('n', '<Space>w', '<Cmd>update<CR>')
-
-vim.keymap.set('n', 'Z', '<Cmd>wqall<CR>', { nowait = true })
-
-
--- `s` is used as a prefix key of plugin sandwich and hop.
-vim.keymap.set('n', 's', '<Nop>')
-vim.keymap.set('x', 's', '<Nop>')
-
-
--- Commands {{{1
-
--- Reverse a selected range in line-wise.
--- Note: directly calling `g/^/m` will overwrite the current search pattern with
--- '^' and highlight it, which is not expected.
--- :h :keeppatterns
-vim.api.nvim_create_user_command(
-   'Reverse',
-   'keeppatterns <line1>,<line2>g/^/m<line1>-1',
-   {
-      desc = 'Reverse lines',
-      bar = true,
-      range = '%',
-   }
-)
-
-
-
-function vimrc.fn.smart_tabedit(mods, args)
-   local is_empty_buffer = (
-      F.bufname() == ''
-      and not vim.bo.modified
-      and F.line('$') <= 1
-      and F.getline('.') == ''
-   )
-
-   if is_empty_buffer then
-      vim.cmd(mods .. ' edit ' .. args)
-   else
-      vim.cmd(mods .. ' tabedit ' .. args)
-   end
-end
-
-
--- If the current buffer is empty, open a file with the current window;
--- otherwise open a new tab.
-vim.api.nvim_create_user_command(
-   'SmartTabEdit',
-   function(opts) vimrc.fn.smart_tabedit(opts.mods, opts.args) end,
-   {
-      desc = 'Smartly open a file',
-      nargs = '*',
-      complete = 'file',
-   }
-)
-
-
-
--- Appearance {{{1
-
--- Color scheme {{{2
-
-if not pcall(function() vim.cmd('colorscheme ocean') end) then
-   -- Load "desert", one of the built-in colorschemes, instead of mine
-   -- when nvim failed to load it.
-   vim.cmd('colorscheme desert')
-end
-
-
-
--- Statusline {{{2
-
-O.statusline = '%!v:lua.vimrc.statusline.build()'
-
-vimrc.statusline = {}
-
-function vimrc.statusline.build()
-   local winid = G.statusline_winid
-   local bufnr = F.winbufnr(winid)
-   local is_active = winid == F.win_getid()
-   local left
-   if is_active then
-      local mode, mode_hl = vimrc.statusline.mode()
-      left = string.format('%%#statusLineMode%s# %s %%#statusLine#', mode_hl, mode)
-   else
-      left = ''
-   end
-   local ro = vimrc.statusline.readonly(bufnr)
-   local fname = vimrc.statusline.filename(bufnr)
-   local mod = vimrc.statusline.modified(bufnr)
-   local extra_info = vimrc.statusline.extra_info(bufnr, winid)
-   local linenum = vimrc.statusline.linenum(winid)
-   local fenc = vimrc.statusline.fenc(bufnr)
-   local eol = vimrc.statusline.eol(bufnr)
-   local ff = vimrc.statusline.ff(bufnr)
-   local ft = vimrc.statusline.filetype(bufnr)
-   return string.format(
-      '%s %s%s%s %%= %s%s %s%s%s %s ',
-      left,
-      ro and ro .. ' ' or '',
-      fname,
-      mod and ' ' .. mod or '',
-      extra_info == '' and '' or extra_info .. ' ',
-      linenum,
-      fenc,
-      eol,
-      ff,
-      ft)
-end
-
-function vimrc.statusline.mode()
-   local mode_map = {
-      n                       = { 'N',  'Normal'   },
-      no                      = { 'O',  'Operator' },
-      nov                     = { 'Oc', 'Operator' },
-      noV                     = { 'Ol', 'Operator' },
-      [vimrc.term('no<C-v>')] = { 'Ob', 'Operator' },
-      niI                     = { 'In', 'Insert'   },
-      niR                     = { 'Rn', 'Replace'  },
-      niV                     = { 'Rn', 'Replace'  },
-      v                       = { 'V',  'Visual'   },
-      V                       = { 'Vl', 'Visual'   },
-      [vimrc.term('<C-v>')]   = { 'Vb', 'Visual'   },
-      s                       = { 'S',  'Visual'   },
-      S                       = { 'Sl', 'Visual'   },
-      [vimrc.term('<C-s>')]   = { 'Sb', 'Visual'   },
-      i                       = { 'I',  'Insert'   },
-      ic                      = { 'I?', 'Insert'   },
-      ix                      = { 'I?', 'Insert'   },
-      R                       = { 'R',  'Replace'  },
-      Rc                      = { 'R?', 'Replace'  },
-      Rv                      = { 'R',  'Replace'  },
-      Rx                      = { 'R?', 'Replace'  },
-      c                       = { 'C',  'Command'  },
-      cv                      = { 'C',  'Command'  },
-      ce                      = { 'C',  'Command'  },
-      r                       = { '-',  'Other'    },
-      rm                      = { '-',  'Other'    },
-      ['r?']                  = { '-',  'Other'    },
-      ['!']                   = { '-',  'Other'    },
-      t                       = { 'T',  'Terminal' },
-   }
-   local vim_mode_and_hl = mode_map[F.mode(true)] or { '-', 'Other' }
-   local vim_mode = vim_mode_and_hl[1]
-   local hl = vim_mode_and_hl[2]
-
-   -- Calling `eskk#statusline()` makes Vim autoload eskk. If you call it
-   -- without checking `g:loaded_autoload_eskk`, eskk is loaded on an early
-   -- stage of the initialization (probably the first rendering of status line),
-   -- which slows down Vim startup. Loading eskk can be delayed by checking both
-   -- of `g:loaded_eskk` and `g:loaded_autoload_eskk`.
-   local skk_mode
-   if G.loaded_eskk and G.loaded_autoload_eskk then
-      skk_mode = F['eskk#statusline'](' (%s)', '')
-   else
-      skk_mode = ''
-   end
-
-   return vim_mode .. skk_mode, hl
-end
-
-function vimrc.statusline.readonly(bufnr)
-   local ro = F.getbufvar(bufnr, '&readonly')
-   if ro == 1 then
-      return '[RO]'
-   else
-      return nil
-   end
-end
-
-function vimrc.statusline.filename(bufnr)
-   if F.bufname(bufnr) == '' then
-      return '[No Name]'
-   end
-   if vim.b[bufnr]._scratch_ then
-      return '*scratch*'
-   end
-
-   local this_path = F.expand(('#%s:p'):format(bufnr))
-   local other_paths = {}
-   for b = 1, F.bufnr('$') do
-      if F.bufexists(b) and b ~= bufnr then
-         other_paths[#other_paths+1] = F.bufname(b)
-      end
-   end
-
-   return uniquify.uniquify(this_path, other_paths)
-end
-
-function vimrc.statusline.modified(bufnr)
-   local mod = F.getbufvar(bufnr, '&modified')
-   local ma = F.getbufvar(bufnr, '&modifiable')
-   if mod == 1 then
-      return '[+]'
-   elseif ma == 0 then
-      return '[-]'
-   else
-      return nil
-   end
-end
-
-function vimrc.statusline.extra_info(bufnr, winid)
-   local autosave = F.getbufvar(bufnr, 'autosave_timer_id', -1) ~= -1
-   local spell = F.getwinvar(winid, '&spell') == 1
-   return (autosave and '(A)' or '') .. (spell and '(S)' or '')
-end
-
-function vimrc.statusline.linenum(winid)
-   return F.line('.', winid) .. '/' .. F.line('$', winid)
-end
-
-function vimrc.statusline.fenc(bufnr)
-   local fenc = F.getbufvar(bufnr, '&fileencoding')
-   local bom = F.getbufvar(bufnr, '&bomb')  -- BOMB!!
-
-   if fenc == '' then
-      local fencs = F.split(O.fileencodings, ',')
-      fenc = fencs[1] or O.encoding
-   end
-   if fenc == 'utf-8' then
-      return bom == 1 and 'U8[BOM]' or 'U8'
-   elseif fenc == 'utf-16' then
-      return 'U16[BE]'
-   elseif fenc == 'utf-16le' then
-      return 'U16[LE]'
-   elseif fenc == 'ucs-4' then
-      return 'U32[BE]'
-   elseif fenc == 'ucs-4le' then
-      return 'U32[LE]'
-   else
-      return fenc:upper()
-   end
-end
-
-function vimrc.statusline.eol(bufnr)
-   local eol = F.getbufvar(bufnr, '&endofline')
-   return eol == 0 and '[noeol]' or ''
-end
-
-function vimrc.statusline.ff(bufnr)
-   local ff = F.getbufvar(bufnr, '&fileformat')
-   if ff == 'unix' then
-      return ''
-   elseif ff == 'dos' then
-      return ' (CRLF)'
-   elseif ff == 'mac' then
-      return ' (CR)'
-   else
-      return ' (Unknown)'
-   end
-end
-
-function vimrc.statusline.filetype(bufnr)
-   local ft = F.getbufvar(bufnr, '&filetype')
-   if ft == '' then
-      return '[None]'
-   else
-      return ft
-   end
-end
-
-
-
--- Tabline {{{2
-
-O.tabline = '%!v:lua.vimrc.tabline.build()'
-
-vimrc.tabline = {}
-
-function vimrc.tabline.build()
-   local tal = ''
-   for tabnr = 1, F.tabpagenr('$') do
-      local is_active = tabnr == F.tabpagenr()
-      local buflist = F.tabpagebuflist(tabnr)
-      local bufnr = buflist[F.tabpagewinnr(tabnr)]
-      tal = tal .. string.format(
-         '%%#%s# %s ',
-         is_active and 'TabLineSel' or 'TabLine',
-         vimrc.statusline.filename(bufnr))
-   end
-   return tal .. '%#TabLineFill#'
-end
-
-
-
--- Plugins {{{1
-
--- Disable standard plugins. {{{2
-
-G.loaded_gzip             = 1
-G.loaded_matchparen       = 1
-G.loaded_netrw            = 1
-G.loaded_netrwPlugin      = 1
-G.loaded_spellfile_plugin = 1
-G.loaded_tarPlugin        = 1
-G.loaded_zipPlugin        = 1
-
-
-
--- Load and configure third-party plugins. {{{2
-
-vim.api.nvim_create_user_command(
-   'PackerSync',
-   function() require('vimrc.plugins').sync() end,
-   {
-      desc = '[packer.nvim] Synchronize plugins',
-   }
-)
-vimrc.autocmd('BufWritePost', {
-   pattern = {'plugins.lua'},
-   callback = function()
-      vim.cmd('source <afile>')
-      vimrc.autocmd('User', {
-         pattern = 'PackerCompileDone',
-         command = 'echo "[packer] Finished compiling lazy-loaders!"'
-      })
-      require('vimrc.plugins').compile()
-   end,
-})
+--[========================================[--
+--                                          --
+--      _       _ _     _                   --
+--     (_)_ __ (_) |_  | |_   _  __ _       --
+--     | | '_ \| | __| | | | | |/ _` |      --
+--     | | | | | | |_ _| | |_| | (_| |      --
+--     |_|_| |_|_|\__(_)_|\__,_|\__,_|      --
+--                                          --
+--]========================================]--
+
+require('init.00-bootstrap')
+require('init.01-options')
+require('init.02-commands')
+require('init.03-autocmds')
+require('init.04-mappings')
+require('init.05-appearance')
+require('init.06-plugins')
diff --git a/.config/nvim/lua/init/00-bootstrap.lua b/.config/nvim/lua/init/00-bootstrap.lua
new file mode 100644
index 0000000..b65a4f0
--- /dev/null
+++ b/.config/nvim/lua/init/00-bootstrap.lua
@@ -0,0 +1,4 @@
+require('vimrc.my_env').mkdir()
+_G.vimrc = require('vimrc')
+vim.cmd('language messages C')
+vim.cmd('language time C')
diff --git a/.config/nvim/lua/init/01-options.lua b/.config/nvim/lua/init/01-options.lua
new file mode 100644
index 0000000..c229251
--- /dev/null
+++ b/.config/nvim/lua/init/01-options.lua
@@ -0,0 +1,153 @@
+local O = vim.o
+local OPT = vim.opt
+local my_env = require('vimrc.my_env')
+
+
+-- Moving around, searching and patterns {{{1
+
+O.wrapscan = false
+O.ignorecase = true
+O.smartcase = true
+
+
+-- Displaying text {{{1
+
+O.scrolloff = 7
+O.linebreak = true
+O.breakindent = true
+OPT.breakindentopt:append('sbr')
+O.showbreak = '> '
+O.sidescrolloff = 20
+OPT.fillchars = {
+   vert = ' ',
+   fold = ' ',
+   diff = ' ',
+}
+O.cmdheight = 1
+O.list = true
+OPT.listchars = {
+   eol = '\xc2\xac', -- u00ac
+   tab = '\xe2\x96\xb8 ', -- u25b8
+   trail = '\xc2\xb7', -- u00b7
+   extends = '\xc2\xbb', -- u00bb
+   precedes = '\xc2\xab', -- u00ab
+}
+O.concealcursor = 'cnv'
+
+
+-- Syntax, highlighting and spelling {{{1
+
+O.background = 'dark'
+O.synmaxcol = 500
+O.hlsearch = true
+O.termguicolors = true
+O.colorcolumn = '+1'
+
+
+-- Multiple windows {{{1
+
+O.winminheight = 0
+O.hidden = true
+O.switchbuf = 'usetab'
+
+
+-- Multiple tabpages {{{1
+
+O.showtabline = 2
+
+
+-- Terminal {{{1
+
+O.title = false
+
+
+-- Using the mouse {{{1
+
+O.mouse = ''
+
+
+-- Messages and info {{{1
+
+OPT.shortmess:append('asIc')
+O.showmode = false
+O.report = 999
+O.confirm = true
+
+
+-- Selecting text {{{1
+
+O.clipboard = 'unnamed'
+
+
+-- Editing text {{{1
+
+O.undofile = true
+O.textwidth = 0
+OPT.completeopt:remove('preview')
+O.pumheight = 10
+OPT.matchpairs:append('<:>')
+O.joinspaces = false
+OPT.nrformats:append('unsigned')
+
+
+-- Tabs and indenting {{{1
+-- Note: you should also set them for each file types.
+--       These following settings are used for unknown file types.
+
+O.tabstop = 4
+O.shiftwidth = 4
+O.softtabstop = 4
+O.expandtab = true
+O.smartindent = true
+O.copyindent = true
+O.preserveindent = true
+
+
+-- Folding {{{1
+
+O.foldlevelstart = 0
+OPT.foldopen:append('insert')
+O.foldmethod = 'marker'
+
+
+-- Diff mode {{{1
+
+OPT.diffopt:append('vertical')
+OPT.diffopt:append('foldcolumn:3')
+
+
+-- Mapping {{{1
+
+O.maxmapdepth = 10
+O.timeout = false
+
+
+-- Reading and writing files {{{1
+
+O.fixendofline = false
+O.fileformats = 'unix,dos'
+O.backup = true
+O.backupdir = my_env.backup_dir
+O.autowrite = true
+
+
+-- Command line editing {{{1
+
+OPT.wildignore:append('*.o')
+OPT.wildignore:append('*.obj')
+OPT.wildignore:append('*.lib')
+O.wildignorecase = true
+
+
+-- Executing external commands {{{1
+
+O.shell = 'zsh'
+O.keywordprg = ''
+
+
+-- Encoding {{{1
+
+O.fileencodings = 'utf-8,cp932,euc-jp'
+
+
+-- Misc. {{{1
diff --git a/.config/nvim/lua/init/02-commands.lua b/.config/nvim/lua/init/02-commands.lua
new file mode 100644
index 0000000..541e8da
--- /dev/null
+++ b/.config/nvim/lua/init/02-commands.lua
@@ -0,0 +1,47 @@
+local F = vim.fn
+local C = vim.api.nvim_create_user_command
+
+
+-- :Reverse {{{1
+
+-- Reverse a selected range in line-wise.
+-- Note: directly calling `g/^/m` will overwrite the current search pattern with
+-- '^' and highlight it, which is not expected.
+-- :h :keeppatterns
+C(
+   'Reverse',
+   'keeppatterns <line1>,<line2>g/^/m<line1>-1',
+   {
+      desc = 'Reverse lines',
+      bar = true,
+      range = '%',
+   }
+)
+
+
+-- :SmartTabEdit {{{1
+
+-- If the current buffer is empty, open a file with the current window;
+-- otherwise open a new tab.
+C(
+   'SmartTabEdit',
+   function(opts)
+      local is_empty_buffer = (
+         F.bufname() == ''
+         and not vim.bo.modified
+         and F.line('$') <= 1
+         and F.getline('.') == ''
+      )
+
+      if is_empty_buffer then
+         vim.cmd(mods .. ' edit ' .. args)
+      else
+         vim.cmd(mods .. ' tabedit ' .. args)
+      end
+   end,
+   {
+      desc = 'Smartly open a file',
+      nargs = '*',
+      complete = 'file',
+   }
+)
diff --git a/.config/nvim/lua/init/03-autocmds.lua b/.config/nvim/lua/init/03-autocmds.lua
new file mode 100644
index 0000000..92e4344
--- /dev/null
+++ b/.config/nvim/lua/init/03-autocmds.lua
@@ -0,0 +1,55 @@
+local F = vim.fn
+local O = vim.o
+local vimrc = require('vimrc')
+local A = vimrc.autocmd
+
+
+vimrc.create_augroup_for_vimrc()
+
+
+-- Auto-resize windows when Vim is resized.
+A('VimResized', {
+   command = 'wincmd =',
+})
+
+
+-- Calculate 'numberwidth' to fit file size.
+-- Note: extra 2 is the room of left and right spaces.
+A({'BufEnter', 'WinEnter', 'BufWinEnter'}, {
+   callback = function()
+      vim.wo.numberwidth = #tostring(F.line('$')) + 2
+   end,
+})
+
+
+-- Jump to the last cursor position when you open a file.
+A('BufRead', {
+   callback = function()
+      if 0 < F.line("'\"") and F.line("'\"") <= F.line('$') and
+         not O.filetype:match('commit') and not O.filetype:match('rebase')
+      then
+         vim.cmd('normal g`"')
+      end
+   end,
+})
+
+
+-- Lua version of https://github.com/mopp/autodirmake.vim
+-- License: NYSL
+A('BufWritePre', {
+   callback = function()
+      local dir = F.expand('<afile>:p:h')
+      if F.isdirectory(dir) ~= 0 then
+         return
+      end
+      vimrc.echo(('"%s" does not exist. Create? [y/N] '):format(dir), 'Question')
+      local answer = vimrc.getchar()
+      if answer ~= 'y' and answer ~= 'Y' then
+         return
+      end
+      F.mkdir(dir, 'p')
+   end,
+})
+
+
+vimrc.register_filetype_autocmds_for_indentation()
diff --git a/.config/nvim/lua/init/04-mappings.lua b/.config/nvim/lua/init/04-mappings.lua
new file mode 100644
index 0000000..f7f8a41
--- /dev/null
+++ b/.config/nvim/lua/init/04-mappings.lua
@@ -0,0 +1,563 @@
+local F = vim.fn
+local G = vim.g
+local O = vim.o
+local K = vim.keymap
+
+local vimrc = require('vimrc')
+
+
+-- Note: |:noremap| defines mappings in |Normal|, |Visual|, |Operator-Pending|
+-- and |Select| mode. Because I don't use |Select| mode, I use |:noremap|
+-- instead of |:nnoremap|, |:xnoremap| and |:onoremap| for simplicity.
+
+
+-- Searching {{{1
+
+-- Fix direction of n and N.
+K.set('', 'n', "v:searchforward ? 'n' : 'N'", { expr=true })
+K.set('', 'N', "v:searchforward ? 'N' : 'n'", { expr=true })
+
+K.set('', 'gn', "v:searchforward ? 'gn' : 'gN'", { expr=true })
+K.set('', 'gN', "v:searchforward ? 'gN' : 'gn'", { expr=true })
+
+K.set({'n', 'x'}, '&', '<Cmd>%&&<CR>')
+
+
+-- Registers and macros. {{{1
+
+-- Access an resister in the same way in Insert and Commandline mode.
+K.set({'n', 'x'}, '<C-r>', '"')
+
+F.setreg('j', 'j.')
+F.setreg('k', 'k.')
+F.setreg('n', 'n.')
+F.setreg('m', 'N.')
+K.set('n', '@N', '@m')
+
+-- Repeat the last executed macro as many times as possible.
+-- a => all
+K.set('n', '@a', '9999@@')
+
+-- Execute the last executed macro again.
+K.set('n', '`', '@@')
+
+
+-- Emacs like key mappings in Insert and CommandLine mode. {{{1
+
+K.set('i', '<C-d>', '<Del>')
+
+-- Go elsewhere without dividing the undo history.
+K.set('i', '<C-b>', '<C-g>U<Left>')
+K.set('i', '<C-f>', '<C-g>U<Right>')
+
+-- Delete something deviding the undo history.
+K.set('i', '<C-u>', '<C-g>u<C-u>')
+K.set('i', '<C-w>', '<C-g>u<C-w>')
+
+K.set('c', '<C-a>', '<Home>')
+K.set('c', '<C-e>', '<End>')
+K.set('c', '<C-f>', '<Right>')
+K.set('c', '<C-b>', '<Left>')
+K.set('c', '<C-n>', '<Down>')
+K.set('c', '<C-p>', '<Up>')
+K.set('c', '<C-d>', '<Del>')
+
+K.set({'c', 'i'}, '<Left>', '<Nop>')
+K.set({'c', 'i'}, '<Right>', '<Nop>')
+
+
+
+K.set('n', 'gA', function()
+   local line = F.getline('.')
+   if vim.endswith(line, ';;') then -- for OCaml
+      return 'A<C-g>U<Left><C-g>U<Left>'
+   elseif vim.regex('[,;)]$'):match_str(line) then
+      return 'A<C-g>U<Left>'
+   else
+      return 'A'
+   end
+end, { expr=true, replace_keycodes=true })
+
+
+
+-- QuickFix or location list. {{{1
+
+K.set('n', 'bb', '<Cmd>cc<CR>')
+
+K.set('n', 'bn', ':<C-u><C-r>=v:count1<CR>cnext<CR>', { silent = true })
+K.set('n', 'bp', ':<C-u><C-r>=v:count1<CR>cprevious<CR>', { silent = true })
+
+K.set('n', 'bf', '<Cmd>cfirst<CR>')
+K.set('n', 'bl', '<Cmd>clast<CR>')
+
+K.set('n', 'bS', '<Cmd>colder<CR>')
+K.set('n', 'bs', '<Cmd>cnewer<CR>')
+
+
+
+-- Operators {{{1
+
+-- Throw deleted text into the black hole register ("_).
+K.set({'n', 'x'}, 'c', '"_c')
+K.set({'n', 'x'}, 'C', '"_C')
+
+
+K.set('', 'g=', '=')
+
+
+K.set('', 'ml', 'gu')
+K.set('', 'mu', 'gU')
+
+K.set('', 'gu', '<Nop>')
+K.set('', 'gU', '<Nop>')
+K.set('x', 'u', '<Nop>')
+K.set('x', 'U', '<Nop>')
+
+
+K.set('x', 'x', '"_x')
+
+
+K.set('n', 'Y', 'y$')
+-- In Blockwise-Visual mode, select text linewise.
+-- By default, select text characterwise, neither blockwise nor linewise.
+K.set('x', 'Y', "mode() ==# 'V' ? 'y' : 'Vy'", { expr=true })
+
+
+
+-- Swap the keys entering Replace mode and Visual-Replace mode.
+K.set('n', 'R', 'gR')
+K.set('n', 'gR', 'R')
+K.set('n', 'r', 'gr')
+K.set('n', 'gr', 'r')
+
+
+K.set('n', 'U', '<C-r>')
+
+
+
+
+-- Motions {{{1
+
+K.set('', 'H', '^')
+K.set('', 'L', '$')
+K.set('', 'M', '%')
+
+K.set('', 'gw', 'b')
+K.set('', 'gW', 'B')
+
+K.set('', 'k', 'gk')
+K.set('', 'j', 'gj')
+K.set('', 'gk', 'k')
+K.set('', 'gj', 'j')
+
+K.set('n', 'gff', 'gF')
+
+
+
+-- Tabpages and windows. {{{1
+
+local function move_current_window_to_tabpage()
+   if F.winnr('$') == 1 then
+      -- Leave the current window and open it in a new tabpage.
+      -- Because :wincmd T fails when the current tabpage has only one window.
+      vim.cmd('tab split')
+   else
+      -- Close the current window and re-open it in a new tabpage.
+      vim.cmd('wincmd T')
+   end
+end
+
+
+local function choose_window_interactively()
+   local indicators = {
+      'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ';',
+      '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
+   }
+
+   -- List normal windows up to 20.
+   local wins = {}
+   for winnr = 1, F.winnr('$') do
+      if winnr ~= F.winnr() and F.win_gettype(winnr) == '' then
+         wins[#wins+1] = F.win_getid(winnr)
+      end
+   end
+   if #indicators < #wins then
+      for i = #indicators+1, #wins do
+         wins[i] = nil
+      end
+   end
+
+   -- Handle special cases.
+   if #wins == 0 then
+      return
+   end
+   if #wins == 1 then
+      if wins[1] == F.win_getid() then
+         F.win_gotoid(wins[2])
+      else
+         F.win_gotoid(wins[1])
+      end
+      return
+   end
+
+   -- Show popups.
+   local popups = {}
+   for i = 1, #wins do
+      local winid = wins[i]
+      local indicator = indicators[i]
+      local buf_id = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(buf_id, 0, -1, true, { '  ' .. indicator .. '  ' })
+      local popup = vim.api.nvim_open_win(
+         buf_id,
+         false,
+         {
+            relative = 'win',
+            win = winid,
+            row = (F.winheight(winid) - 5) / 2,
+            col = (F.winwidth(winid) - 9) / 2,
+            width = 5,
+            height = 1,
+            focusable = false,
+            style = 'minimal',
+            border = 'solid',
+            noautocmd = true,
+         })
+      popups[#popups+1] = {
+         winid = popup,
+         indicator = indicator,
+         target_winid = winid,
+      }
+   end
+
+   -- Prompt
+   local result = vimrc.getchar_with_prompt('Select window: ')
+
+   -- Jump
+   local jump_target = -1
+   for i, popup in ipairs(popups) do
+      if string.upper(result) == popup.indicator then
+         jump_target = popup.target_winid
+      end
+   end
+   if jump_target ~= -1 then
+      F.win_gotoid(jump_target)
+   end
+
+   -- Close popups
+   for i, popup in ipairs(popups) do
+      vim.api.nvim_win_close(popup.winid, true)
+   end
+end
+
+
+K.set('n', 'tt', '<Cmd>tabnew<CR>')
+K.set('n', 'tT', move_current_window_to_tabpage)
+
+K.set('n', 'tn', ":<C-u><C-r>=(tabpagenr() + v:count1 - 1) % tabpagenr('$') + 1<CR>tabnext<CR>", { silent=true })
+K.set('n', 'tp', ":<C-u><C-r>=(tabpagenr('$') * 10 + tabpagenr() - v:count1 - 1) % tabpagenr('$') + 1<CR>tabnext<CR>", { silent=true })
+
+K.set('n', 'tN', '<Cmd>tabmove +<CR>')
+K.set('n', 'tP', '<Cmd>tabmove -<CR>')
+
+K.set('n', 'tsh', '<Cmd>leftabove vsplit<CR>')
+K.set('n', 'tsj', '<Cmd>rightbelow split<CR>')
+K.set('n', 'tsk', '<Cmd>leftabove split<CR>')
+K.set('n', 'tsl', '<Cmd>rightbelow vsplit<CR>')
+
+K.set('n', 'tsH', '<Cmd>topleft vsplit<CR>')
+K.set('n', 'tsJ', '<Cmd>botright split<CR>')
+K.set('n', 'tsK', '<Cmd>topleft split<CR>')
+K.set('n', 'tsL', '<Cmd>botright vsplit<CR>')
+
+K.set('n', 'twh', '<Cmd>leftabove vnew<CR>')
+K.set('n', 'twj', '<Cmd>rightbelow new<CR>')
+K.set('n', 'twk', '<Cmd>leftabove new<CR>')
+K.set('n', 'twl', '<Cmd>rightbelow vnew<CR>')
+
+K.set('n', 'twH', '<Cmd>topleft vnew<CR>')
+K.set('n', 'twJ', '<Cmd>botright new<CR>')
+K.set('n', 'twK', '<Cmd>topleft new<CR>')
+K.set('n', 'twL', '<Cmd>botright vnew<CR>')
+
+K.set('n', 'th', '<C-w>h')
+K.set('n', 'tj', '<C-w>j')
+K.set('n', 'tk', '<C-w>k')
+K.set('n', 'tl', '<C-w>l')
+
+K.set('n', 'tH', '<C-w>H')
+K.set('n', 'tJ', '<C-w>J')
+K.set('n', 'tK', '<C-w>K')
+K.set('n', 'tL', '<C-w>L')
+
+K.set('n', 'tx', '<C-w>x')
+
+-- r => manual resize.
+-- R => automatic resize.
+K.set('n', 'tRH', '<C-w>_')
+K.set('n', 'tRW', '<C-w><Bar>')
+K.set('n', 'tRR', '<C-w>_<C-w><Bar>')
+
+K.set('n', 't=', '<C-w>=')
+
+K.set('n', 'tq', '<Cmd>bdelete<CR>')
+
+K.set('n', 'tc', '<C-w>c')
+
+K.set('n', 'to', '<C-w>o')
+K.set('n', 'tO', '<Cmd>tabonly<CR>')
+
+K.set('n', 'tg', choose_window_interactively)
+
+
+
+local function smart_open(command)
+   local modifiers
+   if F.winwidth(F.winnr()) < 150 then
+      modifiers = 'topleft'
+   else
+      modifiers = 'vertical botright'
+   end
+
+   vim.cmd(([[
+   try
+      %s %s
+      let g:__ok = v:true
+   catch
+      echohl Error
+      echo v:exception
+      echohl None
+      let g:__ok = v:false
+   endtry
+   ]]):format(modifiers, command))
+   if not G.__ok then
+      return
+   end
+
+   if O.filetype == 'help' then
+      if vim.bo.textwidth > 0 then
+         vim.cmd(('vertical resize %d'):format(vim.bo.textwidth))
+      end
+      -- Move the cursor to the beginning of the line as help tags are often
+      -- right-justfied.
+      F.cursor(
+         0 --[[ stay in the current line ]],
+         1 --[[ move to the beginning of the line ]])
+   end
+end
+
+vim.api.nvim_create_user_command(
+   'SmartOpen',
+   function(opts) smart_open(opts.args) end,
+   {
+      desc = 'Smartly open a new buffer',
+      nargs = '+',
+      complete = 'command',
+   }
+)
+
+
+
+
+-- Toggle options {{{1
+
+K.set('n', 'T', '<Nop>')
+
+K.set('n', 'Ta', '<Cmd>AutosaveToggle<CR>')
+K.set('n', 'Tb', ':<C-u>if &background == "dark" <Bar>set background=light <Bar>else <Bar>set background=dark <Bar>endif<CR>', { silent=true })
+K.set('n', 'Tc', ':<C-u>set cursorcolumn! <Bar>set cursorline!<CR>', { silent=true })
+K.set('n', 'Td', ':<C-u>if &diff <Bar>diffoff <Bar>else <Bar>diffthis <Bar>endif<CR>', { silent=true })
+K.set('n', 'Te', '<Cmd>set expandtab!<CR>')
+K.set('n', 'Th', '<Cmd>set hlsearch!<CR>')
+K.set('n', 'Tn', '<Cmd>set number!<CR>')
+K.set('n', 'Ts', '<Cmd>set spell!<CR>')
+K.set('n', 'T8', ':<C-u>if &textwidth ==# 80 <Bar>set textwidth=0 <Bar>else <Bar>set textwidth=80 <Bar>endif<CR>', { silent=true })
+K.set('n', 'T0', ':<C-u>if &textwidth ==# 100 <Bar>set textwidth=0 <Bar>else <Bar>set textwidth=100 <Bar>endif<CR>', { silent=true })
+K.set('n', 'T2', ':<C-u>if &textwidth ==# 120 <Bar>set textwidth=0 <Bar>else <Bar>set textwidth=120 <Bar>endif<CR>', { silent=true })
+K.set('n', 'Tw', '<Cmd>set wrap!<CR>')
+
+K.set('n', 'TA', 'Ta', { remap=true })
+K.set('n', 'TB', 'Tb', { remap=true })
+K.set('n', 'TC', 'Tc', { remap=true })
+K.set('n', 'TD', 'Td', { remap=true })
+K.set('n', 'TE', 'Te', { remap=true })
+K.set('n', 'TH', 'Th', { remap=true })
+K.set('n', 'TN', 'Tn', { remap=true })
+K.set('n', 'TS', 'Ts', { remap=true })
+K.set('n', 'TW', 'Tw', { remap=true })
+
+
+
+-- Increment/decrement numbers {{{1
+
+-- nnoremap  +  <C-a>
+-- nnoremap  -  <C-x>
+-- xnoremap  +  <C-a>
+-- xnoremap  -  <C-x>
+-- xnoremap  g+  g<C-a>
+-- xnoremap  g-  g<C-x>
+
+
+
+-- Open *scratch* buffer {{{1
+
+local EXTENSION_MAPPING = {
+   bash       = 'sh',
+   haskell    = 'hs',
+   javascript = 'js',
+   markdown   = 'md',
+   python     = 'py',
+   ruby       = 'rb',
+   rust       = 'rs',
+   typescript = 'ts',
+   zsh        = 'sh',
+}
+
+local function make_scratch_buffer_name(ft)
+   local now = F.localtime()
+   if ft == '' then
+      ft = 'txt'
+   end
+   local ext = EXTENSION_MAPPING[ft] or ft
+   return my_env.scratch_dir .. '/' .. F.strftime('%Y-%m', now), F.strftime('%Y-%m-%d-%H%M%S'), ext
+end
+
+local function open_scratch()
+   local ok, ft = pcall(function() return vimrc.input('filetype: ') end)
+   if not ok then
+      vimrc.echo('Canceled', 'ErrorMsg')
+      return
+   end
+   ft = vim.trim(ft)
+   local dir, fname, ext = make_scratch_buffer_name(ft)
+   if F.isdirectory(dir) == 0 then
+      F.mkdir(dir, 'p')
+   end
+   vim.cmd(('SmartTabEdit %s/%s.%s'):format(dir, fname, ext))
+   if vim.bo.filetype ~= ft then
+      vim.cmd('setlocal filetype=' .. ft)
+   end
+   vim.b._scratch_ = true
+   if vim.fn.exists(':AutosaveEnable') == 2 then
+      vim.cmd('AutosaveEnable')
+   end
+end
+
+vim.api.nvim_create_user_command(
+   'Scratch',
+   function() open_scratch() end,
+   {
+      desc = 'Open a *scratch* buffer',
+   }
+)
+
+K.set('n', '<Space>s', '<Cmd>Scratch<CR>')
+
+
+
+-- Disable unuseful or dangerous mappings. {{{1
+
+-- Disable Select mode.
+K.set('n', 'gh', '<Nop>')
+K.set('n', 'gH', '<Nop>')
+K.set('n', 'g<C-h>', '<Nop>')
+
+-- Disable Ex mode.
+K.set('n', 'Q', '<Nop>')
+K.set('n', 'gQ', '<Nop>')
+
+K.set('n', 'ZZ', '<Nop>')
+K.set('n', 'ZQ', '<Nop>')
+
+
+-- Help {{{1
+
+-- Search help.
+K.set('n', '<C-h>', ':<C-u>SmartOpen help<Space>')
+
+
+
+-- For writing Vim script. {{{1
+
+K.set('n', 'XV', '<Cmd>SmartTabEdit $MYVIMRC<CR>')
+
+-- See |numbered-function|.
+K.set('n', 'XF', ':<C-u>function {<C-r>=v:count<CR>}<CR>', { silent=true })
+
+K.set('n', 'XM', '<Cmd>messages<CR>')
+
+
+
+
+
+
+
+-- Abbreviations {{{1
+
+vimrc.iabbrev('TOOD', 'TODO')
+vimrc.iabbrev('retrun', 'return')
+vimrc.iabbrev('reutrn', 'return')
+vimrc.iabbrev('tihs', 'this')
+
+
+vimrc.cabbrev('S', '%s')
+
+
+
+-- Misc. {{{1
+
+K.set('o', 'gv', ':<C-u>normal! gv<CR>', { silent=true })
+
+-- Swap : and ;.
+K.set('n', ';', ':')
+K.set('n', ':', ';')
+K.set('x', ';', ':')
+K.set('x', ':', ';')
+K.set('n', '@;', '@:')
+K.set('x', '@;', '@:')
+K.set('!', '<C-r>;', '<C-r>:')
+
+
+-- Since <ESC> may be mapped to something else somewhere, it should be :map, not
+-- :noremap.
+K.set('!', 'jk', '<ESC>', { remap=true })
+
+
+
+K.set('n', '<C-c>', ':<C-u>nohlsearch<CR>', { silent=true })
+
+
+-- Lua function cannot be set to 'operatorfunc' for now.
+vim.cmd([[
+   function! Vimrc_insert_black_line_below(type = '') abort
+      if a:type ==# ''
+         set operatorfunc=Vimrc_insert_black_line_below
+         return 'g@ '
+      else
+         for i in range(v:count1)
+            call append(line('.'), '')
+         endfor
+      endif
+   endfunction
+   function! Vimrc_insert_black_line_above(type = '') abort
+      if a:type ==# ''
+         set operatorfunc=Vimrc_insert_black_line_above
+         return 'g@ '
+      else
+         for i in range(v:count1)
+            call append(line('.') - 1, '')
+         endfor
+      endif
+   endfunction
+]])
+K.set('n', 'go', F.Vimrc_insert_black_line_below, { expr = true })
+K.set('n', 'gO', F.Vimrc_insert_black_line_above, { expr = true })
+
+
+K.set('n', '<Space>w', '<Cmd>update<CR>')
+
+K.set('n', 'Z', '<Cmd>wqall<CR>', { nowait = true })
+
+
+-- `s` is used as a prefix key of plugin sandwich and hop.
+K.set('n', 's', '<Nop>')
+K.set('x', 's', '<Nop>')
diff --git a/.config/nvim/lua/init/05-appearance.lua b/.config/nvim/lua/init/05-appearance.lua
new file mode 100644
index 0000000..29ba657
--- /dev/null
+++ b/.config/nvim/lua/init/05-appearance.lua
@@ -0,0 +1,227 @@
+local F = vim.fn
+local G = vim.g
+local O = vim.o
+local uniquify = require('uniquify')
+local vimrc = require('vimrc')
+
+
+-- Color scheme {{{1
+
+if not pcall(function() vim.cmd('colorscheme ocean') end) then
+   -- Load "desert", one of the built-in colorschemes, instead of mine
+   -- when nvim failed to load it.
+   vim.cmd('colorscheme desert')
+end
+
+
+-- Statusline {{{1
+
+O.statusline = '%!v:lua.vimrc.statusline.build()'
+
+vimrc.statusline = {}
+
+function vimrc.statusline.build()
+   local winid = G.statusline_winid
+   local bufnr = F.winbufnr(winid)
+   local is_active = winid == F.win_getid()
+   local left
+   if is_active then
+      local mode, mode_hl = vimrc.statusline.mode()
+      left = string.format('%%#statusLineMode%s# %s %%#statusLine#', mode_hl, mode)
+   else
+      left = ''
+   end
+   local ro = vimrc.statusline.readonly(bufnr)
+   local fname = vimrc.statusline.filename(bufnr)
+   local mod = vimrc.statusline.modified(bufnr)
+   local extra_info = vimrc.statusline.extra_info(bufnr, winid)
+   local linenum = vimrc.statusline.linenum(winid)
+   local fenc = vimrc.statusline.fenc(bufnr)
+   local eol = vimrc.statusline.eol(bufnr)
+   local ff = vimrc.statusline.ff(bufnr)
+   local ft = vimrc.statusline.filetype(bufnr)
+   return string.format(
+      '%s %s%s%s %%= %s%s %s%s%s %s ',
+      left,
+      ro and ro .. ' ' or '',
+      fname,
+      mod and ' ' .. mod or '',
+      extra_info == '' and '' or extra_info .. ' ',
+      linenum,
+      fenc,
+      eol,
+      ff,
+      ft)
+end
+
+function vimrc.statusline.mode()
+   local mode_map = {
+      n                       = { 'N',  'Normal'   },
+      no                      = { 'O',  'Operator' },
+      nov                     = { 'Oc', 'Operator' },
+      noV                     = { 'Ol', 'Operator' },
+      [vimrc.term('no<C-v>')] = { 'Ob', 'Operator' },
+      niI                     = { 'In', 'Insert'   },
+      niR                     = { 'Rn', 'Replace'  },
+      niV                     = { 'Rn', 'Replace'  },
+      v                       = { 'V',  'Visual'   },
+      V                       = { 'Vl', 'Visual'   },
+      [vimrc.term('<C-v>')]   = { 'Vb', 'Visual'   },
+      s                       = { 'S',  'Visual'   },
+      S                       = { 'Sl', 'Visual'   },
+      [vimrc.term('<C-s>')]   = { 'Sb', 'Visual'   },
+      i                       = { 'I',  'Insert'   },
+      ic                      = { 'I?', 'Insert'   },
+      ix                      = { 'I?', 'Insert'   },
+      R                       = { 'R',  'Replace'  },
+      Rc                      = { 'R?', 'Replace'  },
+      Rv                      = { 'R',  'Replace'  },
+      Rx                      = { 'R?', 'Replace'  },
+      c                       = { 'C',  'Command'  },
+      cv                      = { 'C',  'Command'  },
+      ce                      = { 'C',  'Command'  },
+      r                       = { '-',  'Other'    },
+      rm                      = { '-',  'Other'    },
+      ['r?']                  = { '-',  'Other'    },
+      ['!']                   = { '-',  'Other'    },
+      t                       = { 'T',  'Terminal' },
+   }
+   local vim_mode_and_hl = mode_map[F.mode(true)] or { '-', 'Other' }
+   local vim_mode = vim_mode_and_hl[1]
+   local hl = vim_mode_and_hl[2]
+
+   -- Calling `eskk#statusline()` makes Vim autoload eskk. If you call it
+   -- without checking `g:loaded_autoload_eskk`, eskk is loaded on an early
+   -- stage of the initialization (probably the first rendering of status line),
+   -- which slows down Vim startup. Loading eskk can be delayed by checking both
+   -- of `g:loaded_eskk` and `g:loaded_autoload_eskk`.
+   local skk_mode
+   if G.loaded_eskk and G.loaded_autoload_eskk then
+      skk_mode = F['eskk#statusline'](' (%s)', '')
+   else
+      skk_mode = ''
+   end
+
+   return vim_mode .. skk_mode, hl
+end
+
+function vimrc.statusline.readonly(bufnr)
+   local ro = F.getbufvar(bufnr, '&readonly')
+   if ro == 1 then
+      return '[RO]'
+   else
+      return nil
+   end
+end
+
+function vimrc.statusline.filename(bufnr)
+   if F.bufname(bufnr) == '' then
+      return '[No Name]'
+   end
+   if vim.b[bufnr]._scratch_ then
+      return '*scratch*'
+   end
+
+   local this_path = F.expand(('#%s:p'):format(bufnr))
+   local other_paths = {}
+   for b = 1, F.bufnr('$') do
+      if F.bufexists(b) and b ~= bufnr then
+         other_paths[#other_paths+1] = F.bufname(b)
+      end
+   end
+
+   return uniquify.uniquify(this_path, other_paths)
+end
+
+function vimrc.statusline.modified(bufnr)
+   local mod = F.getbufvar(bufnr, '&modified')
+   local ma = F.getbufvar(bufnr, '&modifiable')
+   if mod == 1 then
+      return '[+]'
+   elseif ma == 0 then
+      return '[-]'
+   else
+      return nil
+   end
+end
+
+function vimrc.statusline.extra_info(bufnr, winid)
+   local autosave = F.getbufvar(bufnr, 'autosave_timer_id', -1) ~= -1
+   local spell = F.getwinvar(winid, '&spell') == 1
+   return (autosave and '(A)' or '') .. (spell and '(S)' or '')
+end
+
+function vimrc.statusline.linenum(winid)
+   return F.line('.', winid) .. '/' .. F.line('$', winid)
+end
+
+function vimrc.statusline.fenc(bufnr)
+   local fenc = F.getbufvar(bufnr, '&fileencoding')
+   local bom = F.getbufvar(bufnr, '&bomb')  -- BOMB!!
+
+   if fenc == '' then
+      local fencs = F.split(O.fileencodings, ',')
+      fenc = fencs[1] or O.encoding
+   end
+   if fenc == 'utf-8' then
+      return bom == 1 and 'U8[BOM]' or 'U8'
+   elseif fenc == 'utf-16' then
+      return 'U16[BE]'
+   elseif fenc == 'utf-16le' then
+      return 'U16[LE]'
+   elseif fenc == 'ucs-4' then
+      return 'U32[BE]'
+   elseif fenc == 'ucs-4le' then
+      return 'U32[LE]'
+   else
+      return fenc:upper()
+   end
+end
+
+function vimrc.statusline.eol(bufnr)
+   local eol = F.getbufvar(bufnr, '&endofline')
+   return eol == 0 and '[noeol]' or ''
+end
+
+function vimrc.statusline.ff(bufnr)
+   local ff = F.getbufvar(bufnr, '&fileformat')
+   if ff == 'unix' then
+      return ''
+   elseif ff == 'dos' then
+      return ' (CRLF)'
+   elseif ff == 'mac' then
+      return ' (CR)'
+   else
+      return ' (Unknown)'
+   end
+end
+
+function vimrc.statusline.filetype(bufnr)
+   local ft = F.getbufvar(bufnr, '&filetype')
+   if ft == '' then
+      return '[None]'
+   else
+      return ft
+   end
+end
+
+
+-- Tabline {{{1
+
+O.tabline = '%!v:lua.vimrc.tabline.build()'
+
+vimrc.tabline = {}
+
+function vimrc.tabline.build()
+   local tal = ''
+   for tabnr = 1, F.tabpagenr('$') do
+      local is_active = tabnr == F.tabpagenr()
+      local buflist = F.tabpagebuflist(tabnr)
+      local bufnr = buflist[F.tabpagewinnr(tabnr)]
+      tal = tal .. string.format(
+         '%%#%s# %s ',
+         is_active and 'TabLineSel' or 'TabLine',
+         vimrc.statusline.filename(bufnr))
+   end
+   return tal .. '%#TabLineFill#'
+end
diff --git a/.config/nvim/lua/init/06-plugins.lua b/.config/nvim/lua/init/06-plugins.lua
new file mode 100644
index 0000000..f8af4a5
--- /dev/null
+++ b/.config/nvim/lua/init/06-plugins.lua
@@ -0,0 +1,30 @@
+--- Disable standard plugins. {{{1
+
+vim.g.loaded_gzip             = 1
+vim.g.loaded_matchparen       = 1
+vim.g.loaded_netrw            = 1
+vim.g.loaded_netrwPlugin      = 1
+vim.g.loaded_spellfile_plugin = 1
+vim.g.loaded_tarPlugin        = 1
+vim.g.loaded_zipPlugin        = 1
+
+
+--- Load and configure third-party plugins. {{{1
+vim.api.nvim_create_user_command(
+   'PackerSync',
+   function() require('vimrc.plugins').sync() end,
+   {
+      desc = '[packer.nvim] Synchronize plugins',
+   }
+)
+vimrc.autocmd('BufWritePost', {
+   pattern = {'plugins.lua'},
+   callback = function()
+      vim.cmd('source <afile>')
+      vimrc.autocmd('User', {
+         pattern = 'PackerCompileDone',
+         command = 'echo "[packer] Finished compiling lazy-loaders!"'
+      })
+      require('vimrc.plugins').compile()
+   end,
+})