Simple init.lua config converted from init.vim

init.lua

-- =============================================================================
-- = Utils/Functions =
-- =============================================================================

function CursorMode()
  local mode = vim.fn.mode()
  if mode == 'n' then
    return 'NORMAL'
  elseif mode == 'i' then
       return 'INSERT'
  elseif mode == 'c' then
    return 'COMMAND'
  elseif mode == 'v' || mode == 'V' || mode == '' then
    return 'VISUAL'
  else if mode == 'R' || mode == 'Rv' || mode == 'Rx' then
    return 'REPLACE'
  end
end
    
function SetExpandTab()
  vim.bo.expandtab = true
end
  
  -- Global keymap
local function keymap(mode, lhs, rhs, opts)
  local set_keymap, extend, default_opts = vim.api.nvim_set_keymap, vim.tbl_extend, { noremap = true, silent = true }
  if opts == nil then set_keymap(mode, lhs, rhs, default_opts)
  else set_keymap(mode, lhs, rhs, extend('force', default_opts, opts)) end
end

-- Buffer keymap
local function buf_keymap(mode, lhs, rhs, opts)
  local set_keymap, extend, default_opts = vim.api.nvim_buf_set_keymap, vim.tbl_extend, { noremap = true, silent = true }
  if opts == nil then set_keymap(mode, lhs, rhs, default_opts)
  else set_keymap(mode, lhs, rhs, extend('force', default_opts, opts)) end
end

-- Auto group
local function set_augroup(name, cmds)
  local aucmds = 'augroup ' .. name .. ' au! '
  for k, _ in pairs(cmds) do
    aucmds = aucmds .. k .. ' '
  end
  aucmds = aucmds .. 'augroup end'
  vim.api.nvim_exec(aucmds, false)
end

-- =============================================================================
-- = Auto Commands =
-- =============================================================================

set_augroup('set_invisible_chars', {
  'au FileType help set nolist',
  'au FileType fzf set nolist',
})

set_augroup('set_expandtab', {
  'au BufEnter * :lua SetExpandTab()',
})

-- =============================================================================
-- = Plugins =
-- =============================================================================

vim.cmd 'packadd packer.nvim'
requre 'packer'.startup(function(use)
  use 'tpope/vim-surround'
  use 'srcery-colors/srcery-vim'
end)

-- =============================================================================
-- = Theming and Looks =
-- =============================================================================

vim.wo.number = true
vim.wo.relativenumber = true
vim.o.termguicolors = true
vim.cmd 'colorscheme srcery'

-- =============================================================================
-- = Options =
-- =============================================================================

-- Completion options
vim.o.completeopt = 'menuone,noinsert,noselect'
vim.o.updatetime = 100

-- Search options
vim.o.ignorecase = true
vim.o.smartcase = true
vim.o.expandtab = true
vim.o.wrapscan = true

-- Indent options
vim.o.tabstop = 4
vim.o.shiftwidth = 0
vim.o.softtabstop = 4
vim.o.smartindent = true

-- Line options
vim.o.showmatch = true
vim.o.showbreak = '+++'
vim.o.textwidth = 120
vim.o.scrolloff = 5
vim.wo.linebreak = true
vim.wo.colorcolumn = '120'
vim.wo.signcolumn = 'yes'

-- Move swapfiles and backupfiles into ~/.cache
vim.o.swapfile = true
vim.o.directory = os.getenv('HOME') .. '/.cache/nvim'
vim.o.backup = true
vim.o.backupdir = os.getenv('HOME') .. '/.cache/nvim'

-- Undo even after closing vim
vim.o.undofile = true
vim.o.undodir = os.getenv('HOME') .. '/.cache/nvim'
vim.o.undolevels = 10000
vim.o.history = 10000

-- Enable a little bit performance
vim.o.lazyredraw = true

-- Buffers/Tabs/Windows
vim.o.hidden = true
  
-- Backspace behaviour
vim.o.backspace = indent,eol,start
  
-- Status line
vim.o.showmode = false
vim.o.statusline = [[ %{luaeval("CursorMode()"} %{expand("%:t")} %m%y %=%l/%L ]]
  
-- Better command display
vim.o.cmdheight = 2

vim.wo.list = true
vim.o.listchars = [[tab:▸ ,trail:·,space:·]]

-- =============================================================================
-- = Keybindings =
-- =============================================================================

" Leader key
vim.g.mapleader = ' '

" Map Esc, to perform quick switching between Normal and Insert mode
keymap('i', 'jk', '<ESC>')

" Open built-in file explorer
keymap('n', '<F3>', ':Ex<CR>')

" Edit vimrc
keymap('n', '<leader>ve', ':edit $MYVIMRC<CR>')

" Source the vimrc to reflect changes
keymap('n', '<leader>vs', ':source $MYVIMRC<CR>')

-- =============================================================================
-- = Commands =
-- =============================================================================

command! Config edit $MYVIMRC
command! ConfigReload source $MYVIMRC