nvim-config/lua/plugins/neotree.lua

local is_neotree_focused = function()
    -- Get our current buffer number
    local bufnr = vim.api.nvim_get_current_buf and vim.api.nvim_get_current_buf() or vim.fn.bufnr()
    -- Get all the available sources in neo-tree
    for _, source in ipairs(require("neo-tree").config.sources) do
        -- Get each sources state
        local state = require("neo-tree.sources.manager").get_state(source)
        -- Check if the source has a state, if the state has a buffer and if the buffer is our current buffer
        if state and state.bufnr and state.bufnr == bufnr then
            return true
        end
    end
    return false
end

local function is_neotree_open()
    local manager = require("neo-tree.sources.manager")
    local renderer = require("neo-tree.ui.renderer")

    local success, state = pcall(manager.get_state, "filesystem")

    if not success then
        return false
    end

    local window_exists = renderer.window_exists(state)
    return window_exists
end

-- If the tree is currently open and focused, then close it. If it's not open, or it's open
-- but not currently focused, it is made focused.
-- Effectively prevents the need to close and re-open it to gain focus of the tree.
local function toggle()
    local cmd = require("neo-tree.command")
    if is_neotree_open() and is_neotree_focused() then
        cmd.execute({
            action = "close",
        })
    else
        cmd.execute({
            action = "focus",
            source = "filesystem",
            position = "left",
        })
    end
end

return {
    "nvim-neo-tree/neo-tree.nvim",
    branch = "v3.x",
    dependencies = {
        "nvim-lua/plenary.nvim",
        "nvim-tree/nvim-web-devicons",
        "MunifTanjim/nui.nvim",
    },
    config = function()
        vim.keymap.set("n", "<C-h>", toggle, {})
        require("neo-tree").setup({
            filesystem = {
                filtered_items = {
                    visible = true,
                    hide_dotfiles = false,
                    hide_gitignored = true,
                    never_show = {
                        ".git",
                        ".mypy_cache",
                        "__pycache__",
                    },
                },
            },
            default_component_configs = {
                git_status = {
                    symbols = {
                        -- Change type
                        added = "A",
                        modified = "M",
                        deleted = "D",
                        renamed = "R",
                        -- Status type
                        untracked = "U",
                        ignored = "X",
                        unstaged = "U",
                        staged = "S",
                        conflict = "",
                    },
                },
            },
        })
    end,
}