neovim/lua/plugins/file-tree.lua

-- disable netrw at the very start of your init.lua (strongly advised)
vim.g.loaded_netrw = 1
vim.g.loaded_netrwPlugin = 1

-- set termguicolors to enable highlight groups
vim.opt.termguicolors = true

-- OR setup with some options
require("nvim-tree").setup({
    auto_reload_on_write = true,
    sort_by = "case_sensitive",
    sync_root_with_cwd = true,
    respect_buf_cwd = true,
    update_focused_file = {
        enable = true,
        update_root = true,
    },
    filters = {
        custom = {},
        dotfiles = true,
        exclude = { ".golangci*", ".protolint*", ".gitignore" },
    },
    filesystem_watchers = {
        enable = true,
        debounce_delay = 10,
    },
    git = {
        enable = true,
        ignore = true,
        show_on_dirs = true,
        show_on_open_dirs = true,
        timeout = 400,
    },
    modified = {
        enable = false,
        show_on_dirs = true,
        show_on_open_dirs = true,
    },
    view = {
        width = 40,
        mappings = {
            list = {
                { key = "u", action = "dir_up" },
            },
        },
    },
    renderer = {
        full_name = true,
        group_empty = true,
        indent_markers = {
            enable = true,
        },
        icons = {
            git_placement = "signcolumn",
            show = {
                file = true,
                folder = true,
                folder_arrow = true,
                git = true,
            },
        },
    },
    diagnostics = {
        enable = true,
        show_on_dirs = true,
    },
    actions = {
        change_dir = {
            enable = false,
            restrict_above_cwd = true,
        },
        open_file = {
            resize_window = true,
            window_picker = {
                chars = "aoeui",
            },
        },
        remove_file = {
            close_window = false,
        },
    },
    log = {
        enable = false,
        truncate = true,
        types = {
            all = false,
            config = false,
            copy_paste = false,
            diagnostics = false,
            git = false,
            profile = false,
            watcher = false,
        },
    },
})

local function open_nvim_tree(data)
    -- buffer is a directory
    local directory = vim.fn.isdirectory(data.file) == 1

    if not directory then
        return
    end

    -- change to the directory
    vim.cmd.cd(data.file)

    -- open the tree
    require("nvim-tree.api").tree.open()
end

vim.api.nvim_create_autocmd({ "VimEnter" }, { callback = open_nvim_tree })