nix-config/home/neovim/init.lua

-- luacheck: globals vim

local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
    vim.fn.system({
        "git",
        "clone",
        "--filter=blob:none",
        "https://github.com/folke/lazy.nvim.git",
        "--branch=stable", -- latest stable release
        lazypath,
    })
end
vim.opt.rtp:prepend(lazypath)

vim.g.mapleader = ","
vim.g.maplocaleader = "\\"

require("lazy").setup('plugins')

vim.opt.wrap = false
vim.opt.number = true
vim.opt.compatible = false
vim.opt.mouse = "a"                      -- mouse support
vim.opt.showcmd = true                   -- show incomplete cmds down the bottom
vim.opt.showmode = true                  -- show current mode
vim.opt.showmatch = true                 -- set show matching parenthesis
vim.opt.visualbell = true                -- no sounds
vim.opt.autoread = true                  -- reload files changed outside of vim
vim.opt.backspace = [[indent,eol,start]] -- allow backspacing over everything in insert mode
vim.opt.ignorecase = true                -- ignore case when searching
vim.opt.shiftround = true                -- use multiple of shiftwidth when indenting with '<' and '>'
vim.opt.smartcase = true                 -- ignore case if searching pattern is all lowecase, case-sensitive otherwise
vim.opt.smarttab = true                  -- insert tabs on the start of a line according to shiftwidth, not tabstop
vim.opt.hlsearch = true                  -- highlight search terms
vim.opt.incsearch = true                 -- show search matches as you type
vim.opt.hidden = true
vim.opt.ruler = true
vim.opt.clipboard = "unnamed" -- system clipboard
vim.opt.colorcolumn = "80"

-- vim.cmd("syntax on")
vim.cmd("filetype plugin on")

if vim.fn.has("multi_byte") == 1 and vim.o.encoding == "utf-8" then
    vim.opt.listchars = [[tab:▸ ,extends:❯,precedes:❮,nbsp:±,trail:…]]
else
    vim.opt.listchars = [[tab:> ,extends:>,precedes:<,nbsp:.,trail:_]]
end

vim.opt.splitbelow = true
vim.opt.splitright = true
vim.api.nvim_set_keymap('n', "<A-r>", "<C-w>r", {})

vim.api.nvim_set_keymap('n', "<A-1>", "1gt", {})
vim.api.nvim_set_keymap('n', "<A-2>", "2gt", {})
vim.api.nvim_set_keymap('n', "<A-3>", "3gt", {})
vim.api.nvim_set_keymap('n', "<A-4>", "4gt", {})
vim.api.nvim_set_keymap('n', "<A-5>", "5gt", {})
vim.api.nvim_set_keymap('n', "<A-6>", "6gt", {})
vim.api.nvim_set_keymap('n', "<A-7>", "7gt", {})
vim.api.nvim_set_keymap('n', "<A-8>", "8gt", {})
vim.api.nvim_set_keymap('n', "<A-9>", ":tablast<cr>", {})

vim.api.nvim_set_keymap('n', "<C-l>", ":nohl<CR><C-l>", { noremap = true })

-- todo: try to do it with `vim.api.nvim_set_hl`
vim.cmd("hi CursorLine cterm=NONE,underline ctermbg=NONE") -- highlight line when in insert mode

vim.opt.timeoutlen = 1000
vim.opt.ttimeoutlen = 0

vim.cmd("autocmd InsertEnter * :set cursorline")
vim.cmd("autocmd InsertLeave * :set nocursorline")

-- indentation
vim.cmd("filetype indent on")
vim.opt.softtabstop = 4
vim.opt.expandtab = true
vim.opt.shiftwidth = 4
vim.opt.tabstop = 4
vim.opt.autoindent = true
vim.opt.copyindent = true

-- folds
vim.opt.foldmethod = "indent"
vim.opt.foldnestmax = 3
vim.opt.foldenable = false

vim.opt.termguicolors = true

-- vim.g.markdown_syntax_conceal = 0

vim.opt.updatetime = 100 -- to make gigutter more responsive

if vim.g.neovide then
    vim.o.guifont = "Hack Nerd Font:h10"
end