Load plugin if open nvim with directory

[primeapple]

I'm pretty unsure on how to do this. But I would like to load nvim-tree asynchronous, however if I open nvim with a directory I want it to be loaded immediately.

So nvim test.sh should not load plugin. However nvim . should load plugin.
Could someone give me at least an idea how it should look like?

[eeeXun]

Reference: #534 (reply in thread)

Use user autocmd

vim.api.nvim_create_autocmd("VimEnter", {
    callback = function()
        if vim.fn.argc() == 1 and vim.fn.isdirectory(vim.fn.argv()[1]) ~= 0 then
            vim.api.nvim_exec_autocmds("User", {
                pattern = "IsEnterDir"
            })
            return true
        end
    end
})

vim.api.nvim_create_autocmd("BufAdd", {
    callback = function()
        if vim.fn.isdirectory(vim.fn.expand("%")) ~= 0 then
            vim.api.nvim_exec_autocmds("User", {
                pattern = "IsEditDir"
            })
            return true
        end
    end
})

Add user autocmd in event

use({
    "kyazdani42/nvim-tree.lua",
    cmd = "NvimTreeToggle",
    event = {"User IsEnterDir", "User IsEditDir"},
    config = function() require("plugins.nvimtree") end
})