my-nvim-setup/lua/plugins/neo-tree/config.lua

return function()
  -- Unless you are still migrating, remove the deprecated commands from v1.x
  vim.cmd [[ let g:neo_tree_remove_legacy_commands = 1 ]]

  -- If you want icons for diagnostic errors, you'll need to define them somewhere:
  vim.fn.sign_define("DiagnosticSignError", { text = " ", texthl = "DiagnosticSignError" })
  vim.fn.sign_define("DiagnosticSignWarn", { text = " ", texthl = "DiagnosticSignWarn" })
  vim.fn.sign_define("DiagnosticSignInfo", { text = " ", texthl = "DiagnosticSignInfo" })
  vim.fn.sign_define("DiagnosticSignHint", { text = " ", texthl = "DiagnosticSignHint" })

  require("neo-tree").setup {
    close_if_last_window = false, -- Close Neo-tree if it is the last window left in the tab
    popup_border_style = "rounded",
    enable_git_status = true,
    enable_diagnostics = true,
    open_files_do_not_replace_types = { "terminal", "trouble", "qf" }, -- when opening files, do not use windows containing these filetypes or buftypes
    sort_case_insensitive = false, -- used when sorting files and directories in the tree
    sort_function = nil, -- use a custom function for sorting files and directories in the tree
    -- sort_function = function (a,b)
    --       if a.type == b.type then
    --           return a.path > b.path
    --       else
    --           return a.type > b.type
    --       end
    --   end , -- this sorts files and directories descendantly

    sources = {
      "filesystem",
      "buffers",
      "git_status",
    },

    source_selector = {
      winbar = false,
      statusline = false,
    },

    default_component_configs = {
      container = {
        enable_character_fade = true,
      },
      icon = {
        folder_closed = "",
        folder_open = "",
        default = "*",
        highlight = "NeoTreeFileIcon",
        folder_empty = "󰜌",
        folder_empty_open = "󰜌",
      },
      modified = {
        symbol = "[+]",
        highlight = "NeoTreeModified",
      },
      name = {
        trailing_slash = false,
        use_git_status_colors = true,
        highlight = "NeoTreeFileName",
      },
      git_status = {
        symbols = {
          added = "", -- or "✚", but this is redundant info if you use git_status_colors on the name
          modified = "", -- or "", but this is redundant info if you use git_status_colors on the name
          deleted = "✖", -- this can only be used in the git_status source
          untracked = "",
          ignored = "",
          staged = "",
          conflict = "",
          renamed = "󰁕",
          unstaged = "󰄱",
        },
      },
    },

    window = {
      position = "right",
      width = 35,
      mapping_options = {
        noremap = true,
        nowait = true,
      },
      mappings = {
        ["<space>"] = {
          "toggle_node",
          nowait = false, -- disable `nowait` if you have existing combos starting with this char that you want to use
        },
        ["<2-LeftMouse>"] = "open",
        ["<cr>"] = "open",
        ["o"] = "open",
        ["<esc>"] = "revert_preview",
        ["P"] = { "toggle_preview", config = { use_float = true } },
        ["l"] = "focus_preview",
        ["S"] = "open_split",
        ["s"] = "open_vsplit",
        ["t"] = "open_tabnew",
        ["w"] = "open_with_window_picker",
        ["C"] = "close_node",
        ["z"] = "close_all_nodes",
        ["a"] = {
          "add",
          config = {
            show_path = "none", -- "none", "relative", "absolute"
          },
        },
        ["A"] = "add_directory", -- also accepts the optional config.show_path option like "add". this also supports BASH style brace expansion.
        ["d"] = "delete",
        ["r"] = "rename",
        ["y"] = "copy_to_clipboard",
        ["x"] = "cut_to_clipboard",
        ["p"] = "paste_from_clipboard",
        ["c"] = "copy", -- takes text input for destination, also accepts the optional config.show_path option like "add":
        ["m"] = "move", -- takes text input for destination, also accepts the optional config.show_path option like "add".
        ["q"] = "close_window",
        ["R"] = "refresh",
        ["?"] = "show_help",
        ["<"] = "prev_source",
        [">"] = "next_source",
      },
    },

    filesystem = {
      filtered_items = {
        visible = false, -- when true, they will just be displayed differently than normal items
        hide_dotfiles = false,
        hide_gitignored = false,
        hide_hidden = true, -- only works on Windows for hidden files/directories
        hide_by_name = {
          --"node_modules"
        },
        hide_by_pattern = { -- uses glob style patterns
          --"*.meta",
          --"*/src/*/tsconfig.json",
        },
        always_show = { -- remains visible even if other settings would normally hide it
          --".gitignored",
        },
        never_show = { -- remains hidden even if visible is toggled to true, this overrides always_show
          --".DS_Store",
          --"thumbs.db"
        },
        never_show_by_pattern = { -- uses glob style patterns
          --".null-ls_*",
        },
      },
      follow_current_file = true, -- This will find and focus the file in the active buffer every
      -- time the current file is changed while the tree is open.
      group_empty_dirs = false, -- when true, empty folders will be grouped together
      hijack_netrw_behavior = "open_default", -- netrw disabled, opening a directory opens neo-tree
      -- in whatever position is specified in window.position
      -- "open_current",  -- netrw disabled, opening a directory opens within the
      -- window like netrw would, regardless of window.position
      -- "disabled",    -- netrw left alone, neo-tree does not handle opening dirs
      use_libuv_file_watcher = true, -- This will use the OS level file watchers to detect changes
      -- instead of relying on nvim autocmd events.
      window = {
        mappings = {
          ["<bs>"] = "navigate_up",
          ["."] = "set_root",
          ["H"] = "toggle_hidden",
          ["/"] = "fuzzy_finder",
          ["D"] = "fuzzy_finder_directory",
          ["#"] = "fuzzy_sorter", -- fuzzy sorting using the fzy algorithm
          -- ["D"] = "fuzzy_sorter_directory",
          ["f"] = "filter_on_submit",
          ["<c-x>"] = "clear_filter",
          ["[g"] = "prev_git_modified",
          ["]g"] = "next_git_modified",
        },
        fuzzy_finder_mappings = { -- define keymaps for filter popup window in fuzzy_finder_mode
          ["<down>"] = "move_cursor_down",
          ["<C-n>"] = "move_cursor_down",
          ["<up>"] = "move_cursor_up",
          ["<C-p>"] = "move_cursor_up",
        },
      },

      commands = {}, -- Add a custom command or override a global one using the same function name
    },

    buffers = {
      follow_current_file = true, -- This will find and focus the file in the active buffer every
      -- time the current file is changed while the tree is open.
      group_empty_dirs = true, -- when true, empty folders will be grouped together
      show_unloaded = true,
      window = {
        mappings = {
          ["bd"] = "buffer_delete",
          ["<bs>"] = "navigate_up",
          ["."] = "set_root",
        },
      },
    },

    git_status = {
      window = {
        position = "float",
        mappings = {
          ["A"] = "git_add_all",
          ["gu"] = "git_unstage_file",
          ["ga"] = "git_add_file",
          ["gr"] = "git_revert_file",
          ["gc"] = "git_commit",
          ["gp"] = "git_push",
          ["gg"] = "git_commit_and_push",
        },
      },
    },
  }
end