Add close_node action to close parent directory

doc/nvim-tree-lua.txt

@@ -183,6 +183,7 @@ INFORMATIONS				        *nvim-tree-info*
 - move around like in any vim buffer
 - '<CR>' on '..' will cd in the above directory
 - typing '<C-]>' will cd in the directory under the cursor
+- typing '<BS>' will close current opened directory or parent
 
 - type 'a' to add a file
 - type 'r' to rename a file
@@ -219,6 +220,7 @@ default keybindings will be applied to undefined keys.
         \ edit_vsplit:   '<c-v>',
         \ edit_split:    '<c-x>',
         \ edit_tab:      '<c-t>',
+        \ close_node:    ['<s-cr>', '<bs>'],
         \ cd:            '<c-]>',
         \ preview:       '<Tab>',
         \ create:        'a',

lua/lib/config.lua

@@ -55,6 +55,7 @@ function M.get_bindings()
     edit_vsplit     = keybindings.edit_vsplit or '<C-v>',
     edit_split      = keybindings.edit_split or '<C-x>',
     edit_tab        = keybindings.edit_tab or '<C-t>',
+    close_node      = keybindings.close_node or {'<S-CR>', '<BS>'},
     preview         = keybindings.preview or '<Tab>',
     toggle_ignored  = keybindings.toggle_ignored or 'I',
     toggle_dotfiles = keybindings.toggle_dotfiles or 'H',

lua/lib/lib.lua

@@ -238,6 +238,7 @@ local function set_mappings()
     [bindings.edit_vsplit] = 'on_keypress("vsplit")';
     [bindings.edit_split] = 'on_keypress("split")';
     [bindings.edit_tab] = 'on_keypress("tabnew")';
+    [bindings.close_node] = 'on_keypress("close_node")';
     [bindings.toggle_ignored] = 'on_keypress("toggle_ignored")';
     [bindings.toggle_dotfiles] = 'on_keypress("toggle_dotfiles")';
     [bindings.refresh] = 'on_keypress("refresh")';
@@ -310,6 +311,41 @@ function M.open()
   api.nvim_command('setlocal '..window_opts.split_command)
 end
 
+function M.close_node(node)
+  if node.name == '..' then return end
+
+  local sep = '/'
+  local dname = node.absolute_path:match("(.*"..sep..")")
+  local index = 2
+
+  local function iter(entries)
+    for _, entry in ipairs(entries) do
+      if dname:match('^'..entry.match_path..sep..'$') ~= nil then
+        return entry
+      end
+
+      index = index + 1
+      if entry.open == true then
+        local child = iter(entry.entries)
+        if child ~= nil then return child end
+      end
+    end
+  end
+
+  if node.open == true then
+    node.open = false
+  else
+    local parent = iter(M.Tree.entries)
+    if parent == nil then
+      index = 1
+    else
+      parent.open = false
+    end
+    api.nvim_win_set_cursor(M.Tree.winnr(), {index, 0})
+  end
+  renderer.draw(M.Tree, true)
+end
+
 function M.win_open()
   return M.Tree.winnr() ~= nil
 end

lua/tree.lua

@@ -65,6 +65,7 @@ local keypress_funcs = {
   copy = fs.copy,
   cut = fs.cut,
   paste = fs.paste,
+  close_node = lib.close_node,
   toggle_ignored = lib.toggle_ignored,
   toggle_dotfiles = lib.toggle_dotfiles,
   refresh = lib.refresh_tree,