completion.nix

{ pkgs, ... }: {
  binaries = [];

  lazy = with pkgs.vimPlugins;
    # lua
    ''
      {
        dir = "${nvim-autopairs}",
        name = "autopairs",
        event = "InsertEnter",
        opts = {},
      },
      {
        dir = "${nvim-cmp}",
        name = "nvim-cmp",
        event = { "InsertEnter", "CmdlineEnter" },
        dependencies = {
          { dir = "${cmp-nvim-lsp}", name = "cmp-nvim-lsp" },
          { dir = "${cmp-path}", name = "cmp-path" },
          { dir = "${cmp-buffer}", name = "cmp-buffer" },
          { dir = "${cmp-cmdline}", name = "cmp-cmdline" },
          { dir = "${cmp-nvim-lsp-signature-help}", name = "cmp-signature-help" },
          -- adding icons to completion menu
          { dir = "${lspkind-nvim}", name = "cmp-lspkind" },
        },
        config = function ()
          local cmp = require('cmp')
          local lspkind = require('lspkind')

          cmp.setup({
            sources = cmp.config.sources({
              { name = 'nvim_lsp' },
              { name = 'nvim_lsp_signature_help' },
              { name = 'path' },
            }),
            snippet = {
              expand = function(args)
                vim.snippet.expand(args.body)
              end,
            },
            mapping = cmp.mapping.preset.insert({}),
            formatting = {
              format = lspkind.cmp_format({
                mode = "symbol",
              }),
            },
          })

          -- Use buffer source for `/` and `?`
          cmp.setup.cmdline({ '/', '?' }, {
            mapping = cmp.mapping.preset.cmdline(),
            sources = {
              { name = 'buffer' },
            },
          })

          -- Use cmdline & path source for ':'
          cmp.setup.cmdline(':', {
            mapping = cmp.mapping.preset.cmdline(),
            sources = cmp.config.sources({
              { name = 'path' },
            }, {
              { name = 'cmdline' },
            }),
            matching = { disallow_symbol_nonprefix_matching = false },
          })
        end,
      },
    '';
}