minimal neovim config file in lua, opinionated of course

init_barebones.lua

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

-- Plugin settings that are set with g: variable should be declared BEFORE you load the plugins
-- For example: "let g:varname = ..." becomes "vim.g.varname = ..."
--              "let g:var#name#with#hash = ..." => "vim.g['var#name#with#hash'] = ..."

-- Load the plugins

-- Then run any plugin that uses the setup() function

-- =============================================================================
-- = Theming and Looks =
-- =============================================================================
vim.wo.number = true
vim.wo.relativenumber = true
vim.o.termguicolors = true

-- Uncomment this line and replace <name> with the colorscheme name
-- vim.cmd 'colorscheme <name>'

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

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

-- Indent options
vim.o.tabstop = 4
vim.o.shiftwidth = 0
vim.o.softtabstop = 4
vim.o.expandtab = true
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' -- some prefer 80, I just like to break the rules :)

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

-- Enable undo features, even after closing vim
vim.o.undofile = true
vim.o.undodir = os.getenv('HOME') .. '/.cache/nvim'
vim.o.undolevels = 10000

-- Lazy redraw
vim.o.lazyredraw = true

-- Buffers/Tabs/Windows
vim.o.hidden = true

-- Set spelling
vim.o.spell = false

-- For git
vim.wo.signcolumn = 'yes'

-- Mouse support
vim.o.mouse = 'a'

-- backspace behaviour
vim.o.backspace = 'indent,eol,start'

-- Status line
vim.o.showmode = false

-- Better display
vim.o.cmdheight = 2

-- =============================================================================
-- = Keybindings =
-- =============================================================================
vim.g.mapleader = ' '

-- Simple function to map keymap, non-recursive way
local function map_key(mode, lhs, rhs)
  vim.api.nvim_set_keymap(mode, lhs, rhs, { noremap = true, silent = true })
end

-- Unbind default bindings for arrow keys, trust me this is for your own good
map_key('v', '<up>', '<nop>')
map_key('v', '<down>', '<nop>')
map_key('v', '<left>', '<nop>')
map_key('v', '<right>', '<nop>')
map_key('i', '<up>', '<nop>')
map_key('i', '<down>', '<nop>')
map_key('i', '<left>', '<nop>')
map_key('i', '<right>', '<nop>')

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

-- Map escape from terminal input to Normal mode
map_key('i', '<ESC>', [[<C-\><C-n>]])
map_key('i', '<C-[>', [[<C-\><C-n>]])

-- Copy/Paste from the system clipboard
-- I don't recommend this, so uncomment at your own risk
-- map('v', '<C-c>', '"+y<CR>')
-- map('n', '<C-v>', '"+p<CR>')

-- Open built-in file expolorer
map_key('n', '<F3>', ':Ex<CR>')

-- Manual completion
map_key('i', '<C-Space>', '<C-x><C-o>')

-- Disable highlights
map_key('n', '<leader><CR>', ':noh<CR>')

-- Buffer maps
-- You can remap them to any other keys
map_key('n', '<leader>bl', ':buffers<CR>')
-- Go to next buffer
map_key('n', '<C-l>', ':bnext<CR>')
-- Go to previous buffer
map_key('n', '<C-h>', ':bprevious<CR>')
-- Close the current buffer
map_key('n', '<leader>bd', ':bp<BAR>sp<BAR>bn<BAR>bd<CR>')

-- Resize window panes, we can use those arrow keys
-- to help use resize windows - at least we give them some purpose
map_key('n', '<up>', ':resize +2<CR>')
map_key('n', '<down>', ':resize -2<CR>')
map_key('n', '<left>', ':vertical resize -2<CR>')
map_key('n', '<right>', ':vertical resize +2<CR>')

-- Move a line of text Alt+[j/k]
map_key('n', '<M-j>', [[mz:m+<CR>`z]])
map_key('n', '<M-k>', [[mz:m-2<CR>`z]])
map_key('v', '<M-j>', [[:m'>+<CR>`<my`>mzgv`yo`z]])
map_key('v', '<M-k>', [[:m'<-2<CR>`>my`<mzgv`yo`z]])

-- Edit vimrc and gvimrc
map_key('n', '<leader>ve', ':e $MYVIMRC<CR>')

-- Source the vimrc to reflect changes
map_key('n', '<leader>vs', ':luafile $MYVIMRC<CR>')

-- Reload file
map_key('n', '<leader>r', ':e!<CR>')

-- =============================================================================
-- = Commands =
-- =============================================================================
vim.cmd 'command! Config edit $MYVIMRC'
vim.cmd 'command! ConfigReload luafile $MYVIMRC'

-- Don't make mistakes, there are no such thing :)
vim.cmd 'command! -nargs=* W w'
vim.cmd 'command! -nargs=* Wq wq'
vim.cmd 'command! -nargs=* WQ wq'
vim.cmd 'command! -nargs=* Q q'
vim.cmd 'command! -nargs=* Qa qa'
vim.cmd 'command! -nargs=* QA qa'