nix.nvim/nvim/plugin/neotree.lua

if vim.g.did_load_neotree_plugin then
  return
end
vim.g.did_load_neotree_plugin = true

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 = true, -- 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
  default_component_configs = {
    container = {
      enable_character_fade = true
    },
    indent = {
      indent_size = 2,
      padding = 1, -- extra padding on left hand side
      -- indent guides
      with_markers = true,
      indent_marker = "│",
      last_indent_marker = "└",
      highlight = "NeoTreeIndentMarker",
      -- expander config, needed for nesting files
      with_expanders = nil, -- if nil and file nesting is enabled, will enable expanders
      expander_collapsed = "",
      expander_expanded = "",
      expander_highlight = "NeoTreeExpander",
    },
    icon = {
      folder_closed = "",
      folder_open = "",
      folder_empty = "󰜌",
      provider = function(icon, node, state) -- default icon provider utilizes nvim-web-devicons if available
        if node.type == "file" or node.type == "terminal" then
          local success, web_devicons = pcall(require, "nvim-web-devicons")
          local name = node.type == "terminal" and "terminal" or node.name
          if success then
            local devicon, hl = web_devicons.get_icon(name)
            icon.text = devicon or icon.text
            icon.highlight = hl or icon.highlight
          end
        end
      end,
      -- The next two settings are only a fallback, if you use nvim-web-devicons and configure default icons there
      -- then these will never be used.
      default = "*",
      highlight = "NeoTreeFileIcon"
    },
    modified = {
      symbol = "[+]",
      highlight = "NeoTreeModified",
    },
    name = {
      trailing_slash = false,
      use_git_status_colors = true,
      highlight = "NeoTreeFileName",
    },
    git_status = {
      symbols = {
        -- Change type
        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
        renamed   = "󰁕",-- this can only be used in the git_status source
        -- Status type
        untracked = "",
        ignored   = "",
        unstaged  = "󰄱",
        staged    = "",
        conflict  = "",
      }
    },
    -- If you don't want to use these columns, you can set `enabled = false` for each of them individually
    file_size = {
      enabled = true,
      required_width = 64, -- min width of window required to show this column
    },
    type = {
      enabled = true,
      required_width = 122, -- min width of window required to show this column
    },
    last_modified = {
      enabled = true,
      required_width = 88, -- min width of window required to show this column
    },
    created = {
      enabled = true,
      required_width = 110, -- min width of window required to show this column
    },
    symlink_target = {
      enabled = false,
    },
  },
  -- A list of functions, each representing a global custom command
  -- that will be available in all sources (if not overridden in `opts[source_name].commands`)
  -- see `:h neo-tree-custom-commands-global`
  commands = {},
  window = {
    position = "left",
    width = 40,
    mapping_options = {
      noremap = true,
      nowait = true,
    },
    mappings = {
      ["<leader>"] = {
          "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",
      ["<esc>"] = "cancel", -- close preview or floating neo-tree window
      ["P"] = { "toggle_preview", config = { use_float = true, use_image_nvim = true } },
      -- Read `# Preview Mode` for more information
      ["l"] = "focus_preview",
      ["S"] = "open_split",
      ["s"] = "open_vsplit",
      -- ["S"] = "split_with_window_picker",
      -- ["s"] = "vsplit_with_window_picker",
      ["t"] = "open_tabnew",
      -- ["<cr>"] = "open_drop",
      -- ["t"] = "open_tab_drop",
      ["w"] = "open_with_window_picker",
      --["P"] = "toggle_preview", -- enter preview mode, which shows the current node without focusing
      ["C"] = "close_node",
      -- ['C'] = 'close_all_subnodes',
      ["z"] = "close_all_nodes",
      --["Z"] = "expand_all_nodes",
      ["a"] = { 
        "add",
        -- this command supports BASH style brace expansion ("x{a,b,c}" -> xa,xb,xc). see `:h neo-tree-file-actions` for details
        -- some commands may take optional config options, see `:h neo-tree-mappings` for details
        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":
      -- ["c"] = {
      --  "copy",
      --  config = {
      --    show_path = "none" -- "none", "relative", "absolute"
      --  }
      --}
      ["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",
      ["i"] = "show_file_details",
    }
  },
  nesting_rules = {},
  filesystem = {
    filtered_items = {
      visible = false, -- when true, they will just be displayed differently than normal items
      hide_dotfiles = true,
      hide_gitignored = true,
      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",
      },
      always_show_by_pattern = { -- uses glob style patterns
        --".env*",
      },
      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 = {
      enabled = false, -- This will find and focus the file in the active buffer every time
      --               -- the current file is changed while the tree is open.
      leave_dirs_open = false, -- `false` closes auto expanded dirs, such as with `:Neotree reveal`
    },
    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 = false, -- 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",
        ["o"] = { "show_help", nowait=false, config = { title = "Order by", prefix_key = "o" }},
        ["oc"] = { "order_by_created", nowait = false },
        ["od"] = { "order_by_diagnostics", nowait = false },
        ["og"] = { "order_by_git_status", nowait = false },
        ["om"] = { "order_by_modified", nowait = false },
        ["on"] = { "order_by_name", nowait = false },
        ["os"] = { "order_by_size", nowait = false },
        ["ot"] = { "order_by_type", nowait = false },
        -- ['<key>'] = function(state) ... end,
      },
      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",
        -- ['<key>'] = function(state, scroll_padding) ... end,
      },
    },

    commands = {} -- Add a custom command or override a global one using the same function name
  },
  buffers = {
    follow_current_file = {
      enabled = true, -- This will find and focus the file in the active buffer every time
      --              -- the current file is changed while the tree is open.
      leave_dirs_open = false, -- `false` closes auto expanded dirs, such as with `:Neotree reveal`
    },
    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",
        ["o"] = { "show_help", nowait=false, config = { title = "Order by", prefix_key = "o" }},
        ["oc"] = { "order_by_created", nowait = false },
        ["od"] = { "order_by_diagnostics", nowait = false },
        ["om"] = { "order_by_modified", nowait = false },
        ["on"] = { "order_by_name", nowait = false },
        ["os"] = { "order_by_size", nowait = false },
        ["ot"] = { "order_by_type", nowait = false },
      }
    },
  },
  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",
        ["o"] = { "show_help", nowait=false, config = { title = "Order by", prefix_key = "o" }},
        ["oc"] = { "order_by_created", nowait = false },
        ["od"] = { "order_by_diagnostics", nowait = false },
        ["om"] = { "order_by_modified", nowait = false },
        ["on"] = { "order_by_name", nowait = false },
        ["os"] = { "order_by_size", nowait = false },
        ["ot"] = { "order_by_type", nowait = false },
      }
    }
  }
})

vim.cmd([[nnoremap \ :Neotree reveal<cr>]])

vim.keymap.set('n', '<leader>e', '<Cmd>Neotree toggle<CR>', { desc = 'toggle explorer' })
-- vim.keymap.set('n', '<leader>o',
--   function()
--     if vim.bo.filetype == "neo-tree" then
--       vim.cmd.wincmd "p"
--     else
--       vim.cmd.Neotree "focus"
--     end
--   end,
--   { desc = "toggle explorer focus" })