return function()
    -- Setup git completion source
    require("cmp_git").setup()

    -- Set completeopt to have a better completion experience
    vim.o.completeopt = 'menuone,noselect'

    -- luasnip setup
    local luasnip = require 'luasnip'

    -- nvim-cmp setup
    local cmp = require 'cmp'
    if not cmp then return end

    cmp.setup {
        snippet = {expand = function(args) luasnip.lsp_expand(args.body) end},
        mapping = {
            ['<C-p>'] = cmp.mapping.select_prev_item(),
            ['<C-n>'] = cmp.mapping.select_next_item(),
            ['<C-d>'] = cmp.mapping.scroll_docs(-4),
            ['<C-f>'] = cmp.mapping.scroll_docs(4),
            ['<C-Space>'] = cmp.mapping.complete(),
            ['<C-e>'] = cmp.mapping.close(),
            ['<CR>'] = cmp.mapping.confirm {
                behavior = cmp.ConfirmBehavior.Replace,
                select = true
            },
            ['<Tab>'] = function(fallback)
                if cmp.visible() then
                    cmp.select_next_item()
                elseif luasnip.expand_or_jumpable() then
                    luasnip.expand_or_jump()
                else
                    fallback()
                end
            end,
            ['<S-Tab>'] = function(fallback)
                if cmp.visible() then
                    cmp.select_prev_item()
                elseif luasnip.jumpable(-1) then
                    luasnip.jump(-1)
                else
                    fallback()
                end
            end
        },
        sources = {
            {name = 'buffer'}, {name = 'git'}, {name = 'luasnip'},
            {name = 'nvim_lsp'}, {name = 'nvim_lua'}, {name = 'path'}
        }
    }

    -- Enable autopairs when enter is processed
    -- on completion
    local cmp_autopairs = require 'nvim-autopairs.completion.cmp'
    cmp.event:on('confirm_done', cmp_autopairs.on_confirm_done())

    -- load friendly-snippets to luasnip
    require('luasnip/loaders/from_vscode').lazy_load()

    -- Register snippet parameter navigation keybindings
    local mappings = {
        ['<c-j>'] = {luasnip.jump(1)},
        ['<c-k>'] = {luasnip.jump(-1)}
    }

    local wk = require('which-key')
    wk.register(mappings, {mode = "n"})
    wk.register(mappings, {mode = "s"})
end