Minimal Neovim Config

init.lua

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-- options

vim.g.mapleader = " "

local opt = vim.opt

-- UI
opt.laststatus = 3 -- global statusline
opt.number = true -- Print line number
opt.relativenumber = true -- Relative line numbers
opt.scrolloff = 4 -- Lines of context
opt.sidescrolloff = 8 -- Columns of context
opt.termguicolors = true -- True color support

-- Search
opt.ignorecase = true -- Ignore case
opt.smartcase = true -- Don't ignore case with capitals

-- Indent
opt.expandtab = true -- Use spaces instead of tabs
opt.shiftwidth = 2 -- Size of an indent
opt.tabstop = 2 -- Number of spaces tabs count for
opt.smartindent = true -- Insert indents automatically

-- Splits
opt.splitbelow = true -- Put new windows below current
opt.splitright = true -- Put new windows right of current

-- Completions
opt.wildmode = "longest:full,full" -- Command-line completion mode
opt.completeopt = "menu,menuone,noselect"

-- Others
opt.smoothscroll = true
opt.undofile = true
opt.spelllang = { "en", "it" }

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-- keymaps

local map = vim.keymap.set

-- better up/down
map({ "n", "x" }, "j", "v:count == 0 ? 'gj' : 'j'", { expr = true, silent = true })
map({ "n", "x" }, "<Down>", "v:count == 0 ? 'gj' : 'j'", { expr = true, silent = true })
map({ "n", "x" }, "k", "v:count == 0 ? 'gk' : 'k'", { expr = true, silent = true })
map({ "n", "x" }, "<Up>", "v:count == 0 ? 'gk' : 'k'", { expr = true, silent = true })

-- windows
map("n", "<C-h>", "<C-w>h", { desc = "Go to left window", remap = true })
map("n", "<C-j>", "<C-w>j", { desc = "Go to lower window", remap = true })
map("n", "<C-k>", "<C-w>k", { desc = "Go to upper window", remap = true })
map("n", "<C-l>", "<C-w>l", { desc = "Go to right window", remap = true })
map("n", "<leader>-", "<C-W>s", { desc = "Split window below", remap = true })
map("n", "<leader>|", "<C-W>v", { desc = "Split window right", remap = true })

-- Move Lines
map("v", "<C-j>", ":m '>+1<cr>gv=gv", { desc = "Move down" })
map("v", "<C-k>", ":m '<-2<cr>gv=gv", { desc = "Move up" })

-- buffers
map("n", "<S-h>", "<cmd>bprevious<cr>", { desc = "Prev buffer" })
map("n", "<S-l>", "<cmd>bnext<cr>", { desc = "Next buffer" })

-- Clear search with <esc>
map({ "i", "n" }, "<esc>", "<cmd>noh<cr><esc>", { desc = "Escape and clear hlsearch" })

-- https://github.com/mhinz/vim-galore#saner-behavior-of-n-and-n
map("n", "n", "'Nn'[v:searchforward].'zv'", { expr = true, desc = "Next search result" })
map("x", "n", "'Nn'[v:searchforward]", { expr = true, desc = "Next search result" })
map("o", "n", "'Nn'[v:searchforward]", { expr = true, desc = "Next search result" })
map("n", "N", "'nN'[v:searchforward].'zv'", { expr = true, desc = "Prev search result" })
map("x", "N", "'nN'[v:searchforward]", { expr = true, desc = "Prev search result" })
map("o", "N", "'nN'[v:searchforward]", { expr = true, desc = "Prev search result" })

-- better indenting
map("v", "<", "<gv")
map("v", ">", ">gv")

-- file explorer
map("n", "<leader>e", "<cmd>Lexplore<cr><esc>", { desc = "Toggle file explorer" })

-- Improved yank/paste/delete
map("x", "<leader>p", '"_dP', { desc = "Paste without overwriting the default register" })
map({ "n", "v" }, "<leader>d", '"_d', { desc = "Delete without overwriting the default register" })
map({ "n", "v" }, "<leader>y", '"+y', { desc = "Yank to system clipboard" })
map({ "n", "v" }, "<leader>Y", '"+Y', { desc = "Yank to system clipboard" })

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-- autocmds

local function augroup(name)
  return vim.api.nvim_create_augroup("config_" .. name, { clear = true })
end

-- Highlight on yank
vim.api.nvim_create_autocmd("TextYankPost", {
  group = augroup("highlight_yank"),
  callback = function()
    vim.highlight.on_yank({ timeout = 80 })
  end,
})

-- Auto create dir when saving a file, in case some intermediate directory does not exist
vim.api.nvim_create_autocmd({ "BufWritePre" }, {
  group = augroup("auto_create_dir"),
  callback = function(event)
    if event.match:match("^%w%w+://") then
      return
    end
    local file = vim.loop.fs_realpath(event.match) or event.match
    vim.fn.mkdir(vim.fn.fnamemodify(file, ":p:h"), "p")
  end,
})