neovim-config/lua/config/settings.lua

-----------------------------------------------------------------------
-- Line numbers
-----------------------------------------------------------------------

-- Show absolute line numbers.
vim.wo.number = true

-- Show relative line numbers for all lines except the current one.
-- Useful for relative motions (5j, 3k, etc.).
vim.wo.relativenumber = true


-----------------------------------------------------------------------
-- Search and editing behavior
-----------------------------------------------------------------------

-- Ignore case when searching.
vim.opt.ignorecase = true

-- Override ignorecase if the search pattern contains uppercase letters.
-- Example:
--   /foo  -> finds foo, Foo, FOO
--   /Foo  -> finds only Foo variants with capital F
vim.opt.smartcase = true

-- Enable automatic indentation based on the previous line.
vim.opt.smartindent = true


-----------------------------------------------------------------------
-- Indentation
-----------------------------------------------------------------------

-- Number of spaces used to display a tab character.
vim.opt.tabstop = 4

-- Number of spaces used for indentation commands (>>, <<).
vim.opt.shiftwidth = 4

-- Insert spaces instead of tab characters.
vim.opt.expandtab = true

-- Number of spaces inserted/deleted when pressing Tab or Backspace.
vim.opt.softtabstop = 4


-----------------------------------------------------------------------
-- File format and encoding
-----------------------------------------------------------------------

-- Use Unix-style line endings (LF instead of CRLF).
vim.opt.fileformat = "unix"

-- Use UTF-8 encoding.
vim.opt.encoding = "utf-8"


-----------------------------------------------------------------------
-- Line wrapping
-----------------------------------------------------------------------

-- Wrap long lines instead of scrolling horizontally.
vim.opt.wrap = true


-----------------------------------------------------------------------
-- Disable terminal bells
-----------------------------------------------------------------------

-- Disable audible and visual bells.
vim.opt.belloff = "all"


-----------------------------------------------------------------------
-- Split windows
-----------------------------------------------------------------------

-- Open horizontal splits below the current window.
vim.opt.splitbelow = true

-- Open vertical splits to the right of the current window.
vim.opt.splitright = true


-----------------------------------------------------------------------
-- Completion popup menu
-----------------------------------------------------------------------

-- Maximum number of entries displayed in completion popup.
vim.opt.pumheight = 15

-- Transparency level of popup menus.
-- 0 = opaque, 100 = fully transparent.
vim.opt.pumblend = 20


-----------------------------------------------------------------------
-- Temporary files
-----------------------------------------------------------------------

-- Store backup files in /tmp.
-- The // suffix preserves the original directory tree.
vim.opt.backupdir = "/tmp//"

vim.opt.swapfile = false

-- Store swap files in /tmp.
vim.opt.directory = "/tmp//"

-- Store persistent undo files in /tmp.
vim.opt.undodir = "/tmp//"


-----------------------------------------------------------------------
-- Command line
-----------------------------------------------------------------------

-- Height of the command line area.
vim.opt.cmdheight = 1


-----------------------------------------------------------------------
-- System clipboard
-----------------------------------------------------------------------

-- Use the system clipboard (+ register) for yank/paste operations.
vim.opt.clipboard = "unnamedplus"

-- Use this configuration to copy-paste when in remote server

-- vim.g.clipboard = {
--     name = 'OSC 52',
--     copy = {
--         ['+'] = require('vim.ui.clipboard.osc52').copy('+'),
--         ['*'] = require('vim.ui.clipboard.osc52').copy('*'),
--     },
--     paste = {
--         ['+'] = require('vim.ui.clipboard.osc52').paste('+'),
--         ['*'] = require('vim.ui.clipboard.osc52').paste('*'),
--     },
-- }

-----------------------------------------------------------------------
-- netrw file explorer
-----------------------------------------------------------------------

-- Use tree-style listing.
vim.g.netrw_liststyle = 3

-- netrw buffer options:
-- noma    -> not modifiable
-- nomod   -> not marked as modified
-- nu      -> show line numbers
-- nobl    -> do not add to buffer list
-- nowrap  -> disable line wrapping
-- ro      -> read-only
vim.g.netrw_bufsettings = "noma nomod nu nobl nowrap ro"


-- Customize netrw buffers.
vim.api.nvim_create_autocmd("FileType", {
    pattern = "netrw",
    callback = function()
        -- Hide absolute line numbers in netrw.
        vim.opt_local.number = false

        -- Hide relative line numbers in netrw.
        vim.opt_local.relativenumber = false

        -- Disable folding in netrw.
        vim.opt_local.foldenable = false

        -- Keep netrw read-only.
        vim.opt_local.modifiable = false
    end,
})


-----------------------------------------------------------------------
-- Lua indentation
-----------------------------------------------------------------------

-- Use 2 spaces instead of 4 for Lua files.
vim.api.nvim_create_autocmd("FileType", {
    pattern = "lua",
    callback = function()
        vim.opt_local.tabstop = 2
        vim.opt_local.shiftwidth = 2
        vim.opt_local.softtabstop = 2
        vim.opt_local.expandtab = true
    end,
})