kickstart.nvim/lua/custom/plugins/filetree.lua

return {
  "nvim-neo-tree/neo-tree.nvim",
  dependencies = { "MunifTanjim/nui.nvim" },
  cmd = "Neotree",
  init = function() vim.g.neo_tree_remove_legacy_commands = true end,
  opts = function()
    return {
      auto_clean_after_session_restore = true,
      close_if_last_window = true,
      sources = { "filesystem", "buffers", "git_status" },
      source_selector = {
        sources = {
          { source = "filesystem", display_name = " 󰉓 Files " },
          { source = "git_status", display_name = " 󰊢 Git " },
        },
      },
      default_component_configs = {
        icon = {
          folder_empty = "!",
          folder_empty_open = "!O",
        },
        git_status = {
          symbols = {
            renamed  = "󰁕",
            unstaged = "💣",
          },
        },
      },
      document_symbols = {
        kinds = {
          File = { icon = "󰈙", hl = "Tag" },
          Namespace = { icon = "󰌗", hl = "Include" },
          Package = { icon = "󰏖", hl = "Label" },
          Class = { icon = "󰌗", hl = "Include" },
          Property = { icon = "󰆧", hl = "@property" },
          Enum = { icon = "󰒻", hl = "@number" },
          Function = { icon = "󰊕", hl = "Function" },
          String = { icon = "󰀬", hl = "String" },
          Number = { icon = "󰎠", hl = "Number" },
          Array = { icon = "󰅪", hl = "Type" },
          Object = { icon = "󰅩", hl = "Type" },
          Key = { icon = "󰌋", hl = "" },
          Struct = { icon = "󰌗", hl = "Type" },
          Operator = { icon = "󰆕", hl = "Operator" },
          TypeParameter = { icon = "󰊄", hl = "Type" },
          StaticMethod = { icon = '󰠄 ', hl = 'Function' },
        },
      },
      commands = {
        parent_or_close = function(state)
          local node = state.tree:get_node()
          if (node.type == "directory" or node:has_children()) and node:is_expanded() then
            state.commands.toggle_node(state)
          else
            require("neo-tree.ui.renderer").focus_node(state, node:get_parent_id())
          end
        end,
        child_or_open = function(state)
          local node = state.tree:get_node()
          if node.type == "directory" or node:has_children() then
            if not node:is_expanded() then -- if unexpanded, expand
              state.commands.toggle_node(state)
            else                           -- if expanded and has children, seleect the next child
              require("neo-tree.ui.renderer").focus_node(state, node:get_child_ids()[1])
            end
          else -- if not a directory just open it
            state.commands.open(state)
          end
        end,
        copy_selector = function(state)
          local node = state.tree:get_node()
          local filepath = node:get_id()
          local filename = node.name
          local modify = vim.fn.fnamemodify

          local results = {
            e = { val = modify(filename, ":e"), msg = "Extension only" },
            f = { val = filename, msg = "Filename" },
            F = { val = modify(filename, ":r"), msg = "Filename w/o extension" },
            h = { val = modify(filepath, ":~"), msg = "Path relative to Home" },
            p = { val = modify(filepath, ":."), msg = "Path relative to CWD" },
            P = { val = filepath, msg = "Absolute path" },
          }

          local messages = {
            { "\nChoose to copy to clipboard:\n", "Normal" },
          }
          for i, result in pairs(results) do
            if result.val and result.val ~= "" then
              vim.list_extend(messages, {
                { ("%s."):format(i),           "Identifier" },
                { (" %s: "):format(result.msg) },
                { result.val,                  "String" },
                { "\n" },
              })
            end
          end
          vim.api.nvim_echo(messages, false, {})
          local result = results[vim.fn.getcharstr()]
          if result and result.val and result.val ~= "" then
            vim.fn.setreg("+", result.val)
          end
        end,
        find_in_dir = function(state)
          local node = state.tree:get_node()
          local path = node:get_id()
          require("telescope.builtin").find_files {
            cwd = node.type == "directory" and path or vim.fn.fnamemodify(path, ":h"),
          }
        end,
      },
      window = {
        width = 30,
        mappings = {
          ["<space>"] = false, -- disable space until we figure out which-key disabling
          ["[b"] = "prev_source",
          ["]b"] = "next_source",
          Y = "copy_selector",
          h = "parent_or_close",
          l = "child_or_open",
          o = "open",
        },
      },
      filesystem = {
        follow_current_file = true,
        hijack_netrw_behavior = "open_current",
        use_libuv_file_watcher = true,
      },
      event_handlers = {
        {
          event = "neo_tree_buffer_enter",
          handler = function(_) vim.opt_local.signcolumn = "auto" end,
        },
      },
    }
  end,
}