From e53ee104ec251b11b84045dec7782b9b7a03479f Mon Sep 17 00:00:00 2001
From: jdhao <jdhao@hotmail.com>
Date: Fri, 28 Jul 2023 22:27:54 +0200
Subject: feat: move lua conf under lua directory

---
 core/colorschemes.lua | 153 -------------------------------
 core/globals.lua      |  75 ----------------
 core/mappings.lua     | 245 --------------------------------------------------
 init.lua              |  13 ++-
 lua/colorschemes.lua  | 153 +++++++++++++++++++++++++++++++
 lua/globals.lua       |  75 ++++++++++++++++
 lua/mappings.lua      | 245 ++++++++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 482 insertions(+), 477 deletions(-)
 delete mode 100644 core/colorschemes.lua
 delete mode 100644 core/globals.lua
 delete mode 100644 core/mappings.lua
 create mode 100644 lua/colorschemes.lua
 create mode 100644 lua/globals.lua
 create mode 100644 lua/mappings.lua

diff --git a/core/colorschemes.lua b/core/colorschemes.lua
deleted file mode 100644
index 46545b3..0000000
--- a/core/colorschemes.lua
+++ /dev/null
@@ -1,153 +0,0 @@
---- This module will load a random colorscheme on nvim startup process.
-
-local utils = require("utils")
-
-local M = {}
-
--- Colorscheme to its directory name mapping, because colorscheme repo name is not necessarily
--- the same as the colorscheme name itself.
-M.colorscheme2dir = {
-  onedark = "onedark.nvim",
-  edge = "edge",
-  sonokai = "sonokai",
-  gruvbox_material = "gruvbox-material",
-  nord = "nord.nvim",
-  everforest = "everforest",
-  nightfox = "nightfox.nvim",
-  kanagawa = "kanagawa.nvim",
-  catppuccin = "catppuccin",
-  rose_pine = "rose-pine",
-  onedarkpro = "onedarkpro.nvim",
-  monokai = "monokai.nvim",
-  material = "material.nvim",
-}
-
-M.gruvbox8 = function()
-  -- Italic options should be put before colorscheme setting,
-  -- see https://github.com/morhetz/gruvbox/wiki/Terminal-specific#1-italics-is-disabled
-  vim.g.gruvbox_italics = 1
-  vim.g.gruvbox_italicize_strings = 1
-  vim.g.gruvbox_filetype_hi_groups = 1
-  vim.g.gruvbox_plugin_hi_groups = 1
-
-  vim.cmd([[colorscheme gruvbox8_hard]])
-end
-
-M.onedark = function()
-  vim.cmd([[colorscheme onedark]])
-end
-
-M.edge = function()
-  vim.g.edge_enable_italic = 1
-  vim.g.edge_better_performance = 1
-
-  vim.cmd([[colorscheme edge]])
-end
-
-M.sonokai = function()
-  vim.g.sonokai_enable_italic = 1
-  vim.g.sonokai_better_performance = 1
-
-  vim.cmd([[colorscheme sonokai]])
-end
-
-M.gruvbox_material = function()
-  -- 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
-
-M.nord = function()
-  vim.cmd([[colorscheme nord]])
-end
-
-M.doom_one = function()
-  vim.cmd([[colorscheme doom-one]])
-end
-
-M.everforest = function()
-  vim.g.everforest_enable_italic = 1
-  vim.g.everforest_better_performance = 1
-
-  vim.cmd([[colorscheme everforest]])
-end
-
-M.nightfox = function()
-  vim.cmd([[colorscheme nordfox]])
-end
-
-M.kanagawa = function()
-  vim.cmd([[colorscheme kanagawa]])
-end
-
-M.catppuccin = function()
-  -- available option: latte, frappe, macchiato, mocha
-  vim.g.catppuccin_flavour = "frappe"
-
-  require("catppuccin").setup()
-
-  vim.cmd([[colorscheme catppuccin]])
-end
-
-M.rose_pine = function()
-  require('rose-pine').setup({
-    --- @usage 'main' | 'moon'
-    dark_variant = 'moon',
-  })
-
-  -- set colorscheme after options
-  vim.cmd('colorscheme rose-pine')
-end
-
-M.onedarkpro = function()
-  -- set colorscheme after options
-  vim.cmd('colorscheme onedark_vivid')
-end
-
-M.monokai = function()
-  vim.cmd('colorscheme monokai_pro')
-end
-
-M.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.colorscheme2dir))
-
-  if not vim.tbl_contains(vim.tbl_keys(M), colorscheme) then
-    local msg = "Invalid colorscheme: " .. colorscheme
-    vim.notify(msg, vim.log.levels.ERROR, { title = "nvim-config" })
-
-    return
-  end
-
-  -- Load the colorscheme, because all the colorschemes are declared as opt plugins, so the colorscheme isn't loaded yet.
-  local status = utils.add_pack(M.colorscheme2dir[colorscheme])
-
-  if not status then
-    local msg = string.format("Colorscheme %s is not installed. Run PackerSync to install.", colorscheme)
-    vim.notify(msg, vim.log.levels.ERROR, { title = "nvim-config" })
-
-    return
-  end
-
-  -- Load the colorscheme and its settings
-  M[colorscheme]()
-
-  if vim.g.logging_level == "debug" then
-    local msg = "Colorscheme: " .. colorscheme
-
-    vim.notify(msg, vim.log.levels.DEBUG, { title = "nvim-config" })
-  end
-end
-
--- Load a random colorscheme
-M.rand_colorscheme()
diff --git a/core/globals.lua b/core/globals.lua
deleted file mode 100644
index b0af26e..0000000
--- a/core/globals.lua
+++ /dev/null
@@ -1,75 +0,0 @@
-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
diff --git a/core/mappings.lua b/core/mappings.lua
deleted file mode 100644
index 8a1e2e6..0000000
--- a/core/mappings.lua
+++ /dev/null
@@ -1,245 +0,0 @@
-local keymap = vim.keymap
-local api = vim.api
-local uv = vim.loop
-
--- 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", "<cmd>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 line",
-})
-
-keymap.set("n", "gJ", function()
-  -- we must use `normal!`, otherwise it will trigger recursive mapping
-  vim.cmd([[
-      normal! zmgJ`z
-      delmarks z
-    ]])
-end, {
-  desc = "join visual lines",
-})
-
--- Break inserted text into smaller undo units when we insert some punctuation chars.
-local undo_ch = { ",", ".", "!", "?", ";", ":" }
-for _, ch in ipairs(undo_ch) do
-  keymap.set("i", ch, ch .. "<c-g>u")
-end
-
--- insert semicolon in the end
-keymap.set("i", "<A-;>", "<Esc>miA;<Esc>`ii")
-
--- Keep cursor position after yanking
-keymap.set("n", "y", "myy")
-
-api.nvim_create_autocmd("TextYankPost", {
-  pattern = "*",
-  group = api.nvim_create_augroup("restore_after_yank", { clear = true }),
-  callback = function()
-    vim.cmd([[
-      silent! normal! `y
-      silent! delmarks y
-    ]])
-  end,
-})
-
--- Go to the beginning and end of current line in insert mode quickly
-keymap.set("i", "<C-A>", "<HOME>")
-keymap.set("i", "<C-E>", "<END>")
-
--- Go to beginning of command in command-line mode
-keymap.set("c", "<C-A>", "<HOME>")
-
--- Delete the character to the right of the cursor
-keymap.set("i", "<C-D>", "<DEL>")
-
-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)
diff --git a/init.lua b/init.lua
index f294ab2..1cd6815 100644
--- a/init.lua
+++ b/init.lua
@@ -36,8 +36,13 @@ local core_conf_files = {
 }
 
 -- source all the core config files
-for _, name in ipairs(core_conf_files) do
-  local path = string.format("%s/core/%s", vim.fn.stdpath("config"), name)
-  local source_cmd = "source " .. path
-  vim.cmd(source_cmd)
+for _, file_name in ipairs(core_conf_files) do
+  if vim.endswith(file_name, 'vim') then
+    local path = string.format("%s/core/%s", vim.fn.stdpath("config"), file_name)
+    local source_cmd = "source " .. path
+    vim.cmd(source_cmd)
+  else
+    local module_name, _ = string.gsub(file_name, "%.lua", "")
+    require(module_name)
+  end
 end
diff --git a/lua/colorschemes.lua b/lua/colorschemes.lua
new file mode 100644
index 0000000..46545b3
--- /dev/null
+++ b/lua/colorschemes.lua
@@ -0,0 +1,153 @@
+--- This module will load a random colorscheme on nvim startup process.
+
+local utils = require("utils")
+
+local M = {}
+
+-- Colorscheme to its directory name mapping, because colorscheme repo name is not necessarily
+-- the same as the colorscheme name itself.
+M.colorscheme2dir = {
+  onedark = "onedark.nvim",
+  edge = "edge",
+  sonokai = "sonokai",
+  gruvbox_material = "gruvbox-material",
+  nord = "nord.nvim",
+  everforest = "everforest",
+  nightfox = "nightfox.nvim",
+  kanagawa = "kanagawa.nvim",
+  catppuccin = "catppuccin",
+  rose_pine = "rose-pine",
+  onedarkpro = "onedarkpro.nvim",
+  monokai = "monokai.nvim",
+  material = "material.nvim",
+}
+
+M.gruvbox8 = function()
+  -- Italic options should be put before colorscheme setting,
+  -- see https://github.com/morhetz/gruvbox/wiki/Terminal-specific#1-italics-is-disabled
+  vim.g.gruvbox_italics = 1
+  vim.g.gruvbox_italicize_strings = 1
+  vim.g.gruvbox_filetype_hi_groups = 1
+  vim.g.gruvbox_plugin_hi_groups = 1
+
+  vim.cmd([[colorscheme gruvbox8_hard]])
+end
+
+M.onedark = function()
+  vim.cmd([[colorscheme onedark]])
+end
+
+M.edge = function()
+  vim.g.edge_enable_italic = 1
+  vim.g.edge_better_performance = 1
+
+  vim.cmd([[colorscheme edge]])
+end
+
+M.sonokai = function()
+  vim.g.sonokai_enable_italic = 1
+  vim.g.sonokai_better_performance = 1
+
+  vim.cmd([[colorscheme sonokai]])
+end
+
+M.gruvbox_material = function()
+  -- 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
+
+M.nord = function()
+  vim.cmd([[colorscheme nord]])
+end
+
+M.doom_one = function()
+  vim.cmd([[colorscheme doom-one]])
+end
+
+M.everforest = function()
+  vim.g.everforest_enable_italic = 1
+  vim.g.everforest_better_performance = 1
+
+  vim.cmd([[colorscheme everforest]])
+end
+
+M.nightfox = function()
+  vim.cmd([[colorscheme nordfox]])
+end
+
+M.kanagawa = function()
+  vim.cmd([[colorscheme kanagawa]])
+end
+
+M.catppuccin = function()
+  -- available option: latte, frappe, macchiato, mocha
+  vim.g.catppuccin_flavour = "frappe"
+
+  require("catppuccin").setup()
+
+  vim.cmd([[colorscheme catppuccin]])
+end
+
+M.rose_pine = function()
+  require('rose-pine').setup({
+    --- @usage 'main' | 'moon'
+    dark_variant = 'moon',
+  })
+
+  -- set colorscheme after options
+  vim.cmd('colorscheme rose-pine')
+end
+
+M.onedarkpro = function()
+  -- set colorscheme after options
+  vim.cmd('colorscheme onedark_vivid')
+end
+
+M.monokai = function()
+  vim.cmd('colorscheme monokai_pro')
+end
+
+M.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.colorscheme2dir))
+
+  if not vim.tbl_contains(vim.tbl_keys(M), colorscheme) then
+    local msg = "Invalid colorscheme: " .. colorscheme
+    vim.notify(msg, vim.log.levels.ERROR, { title = "nvim-config" })
+
+    return
+  end
+
+  -- Load the colorscheme, because all the colorschemes are declared as opt plugins, so the colorscheme isn't loaded yet.
+  local status = utils.add_pack(M.colorscheme2dir[colorscheme])
+
+  if not status then
+    local msg = string.format("Colorscheme %s is not installed. Run PackerSync to install.", colorscheme)
+    vim.notify(msg, vim.log.levels.ERROR, { title = "nvim-config" })
+
+    return
+  end
+
+  -- Load the colorscheme and its settings
+  M[colorscheme]()
+
+  if vim.g.logging_level == "debug" then
+    local msg = "Colorscheme: " .. colorscheme
+
+    vim.notify(msg, vim.log.levels.DEBUG, { title = "nvim-config" })
+  end
+end
+
+-- Load a random colorscheme
+M.rand_colorscheme()
diff --git a/lua/globals.lua b/lua/globals.lua
new file mode 100644
index 0000000..b0af26e
--- /dev/null
+++ b/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
diff --git a/lua/mappings.lua b/lua/mappings.lua
new file mode 100644
index 0000000..8a1e2e6
--- /dev/null
+++ b/lua/mappings.lua
@@ -0,0 +1,245 @@
+local keymap = vim.keymap
+local api = vim.api
+local uv = vim.loop
+
+-- 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", "<cmd>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 line",
+})
+
+keymap.set("n", "gJ", function()
+  -- we must use `normal!`, otherwise it will trigger recursive mapping
+  vim.cmd([[
+      normal! zmgJ`z
+      delmarks z
+    ]])
+end, {
+  desc = "join visual lines",
+})
+
+-- Break inserted text into smaller undo units when we insert some punctuation chars.
+local undo_ch = { ",", ".", "!", "?", ";", ":" }
+for _, ch in ipairs(undo_ch) do
+  keymap.set("i", ch, ch .. "<c-g>u")
+end
+
+-- insert semicolon in the end
+keymap.set("i", "<A-;>", "<Esc>miA;<Esc>`ii")
+
+-- Keep cursor position after yanking
+keymap.set("n", "y", "myy")
+
+api.nvim_create_autocmd("TextYankPost", {
+  pattern = "*",
+  group = api.nvim_create_augroup("restore_after_yank", { clear = true }),
+  callback = function()
+    vim.cmd([[
+      silent! normal! `y
+      silent! delmarks y
+    ]])
+  end,
+})
+
+-- Go to the beginning and end of current line in insert mode quickly
+keymap.set("i", "<C-A>", "<HOME>")
+keymap.set("i", "<C-E>", "<END>")
+
+-- Go to beginning of command in command-line mode
+keymap.set("c", "<C-A>", "<HOME>")
+
+-- Delete the character to the right of the cursor
+keymap.set("i", "<C-D>", "<DEL>")
+
+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)
-- 
cgit v1.2.3