ansible-collection-dotfiles/roles/neovim/files/config/nvim/lua/plugins/nvim-cmp.lua

local cmp = require "cmp"
local luasnip = require "luasnip"

local has_words_before = function()
	local line, col = unpack(vim.api.nvim_win_get_cursor(0))
	return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match "%s" == nil
end

cmp.setup({
	snippet = {
		expand = function(args)
			luasnip.lsp_expand(args.body)
		end,
	},

	completion = {
		completeopt = "menu,menuone,noinsert",
		keyword_length = 2,
	},

	mapping = {
		["<cr>"] = cmp.mapping.confirm(),
		["<C-Space>"] = cmp.mapping.complete(),
		["<Tab>"] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_next_item()
			elseif luasnip.expand_or_jumpable() then
				luasnip.expand_or_jump()
			elseif has_words_before() then
				cmp.complete()
			else
				fallback()
			end
		end, { "i", "s" }),
		["<S-Tab>"] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_prev_item()
			elseif luasnip.jumpable(-1) then
				luasnip.jump(-1)
			else
				fallback()
			end
		end, { "i", "s" }),
	},

	sources = {
		{ name = "nvim_lsp" },
		{ name = "nvim_lua" },
		{ name = "luasnip" },
		{
			name = "buffer",
			option = {
				keyword_pattern = [[\k\+]],
				-- Use all buffers to complete.
				get_bufnrs = function()
					return vim.api.nvim_list_bufs()
				end,
			},
		},
		{ name = "path" },
	},
})