action to rename the base name of file without changing directory or extension (#1155)

doc/nvim-tree-lua.txt

@@ -1328,6 +1328,7 @@ DEFAULT MAPPINGS                                     *nvim-tree-default-mappings
 `D`               trash               trash a file via |trash| option
 `r`               rename              rename a file
 `<C-r>`           full_rename         rename a file and omit the filename on input
+`e`               rename_relative     rename base name with changing directory or extension
 `x`               cut                 add/remove file/directory to cut clipboard
 `c`               copy                add/remove file/directory to copy clipboard
 `p`               paste               paste from clipboard; cut clipboard has precedence over copy; will prompt for confirmation
@@ -1377,6 +1378,7 @@ DEFAULT MAPPINGS                                     *nvim-tree-default-mappings
     { key = "D",                              action = "trash" },
     { key = "r",                              action = "rename" },
     { key = "<C-r>",                          action = "full_rename" },
+    { key = "e",                              action = "rename_relative" },
     { key = "x",                              action = "cut" },
     { key = "c",                              action = "copy" },
     { key = "p",                              action = "paste" },

lua/nvim-tree/actions/dispatch.lua

@@ -25,6 +25,7 @@ local Actions = {
   trash = require("nvim-tree.actions.fs.trash").fn,
   remove = require("nvim-tree.actions.fs.remove-file").fn,
   rename = require("nvim-tree.actions.fs.rename-file").fn(false),
+  rename_relative = require("nvim-tree.actions.fs.rename-file").fn(false, true),
 
   -- Movements in tree
   close_node = require("nvim-tree.actions.moves.parent").fn(true),

lua/nvim-tree/actions/fs/rename-file.lua

@@ -24,25 +24,46 @@ function M.rename(node, to)
   events._dispatch_node_renamed(node.absolute_path, to)
 end
 
-function M.fn(with_sub)
+function M.fn(with_sub, relative_rename)
   return function(node)
     node = lib.get_last_group_node(node)
     if node.name == ".." then
       return
     end
 
     local namelen = node.name:len()
-    local abs_path = with_sub and node.absolute_path:sub(0, namelen * -1 - 1) or node.absolute_path
+    local abs_directory = node.absolute_path:sub(0, namelen * -1 - 1)
+    local default_path, prepend, append
+    if relative_rename then
+      local filename = node.absolute_path:sub(abs_directory:len() + 1)
+      local extension_index = filename:find"%.[^%.]*$" or -1
+      if extension_index > 1 then
+        default_path = filename:sub(0, extension_index - 1)
+        append = filename:sub(extension_index)
+      else
+        default_path = filename
+        append = ""
+      end
+      prepend = abs_directory
+    else
+      prepend = ""
+      append = ""
+      if with_sub then
+        default_path = abs_directory
+      else
+        default_path = node.absolute_path
+      end
+    end
 
-    local input_opts = { prompt = "Rename to ", default = abs_path, completion = "file" }
+    local input_opts = { prompt = "Rename to ", default = default_path, completion = "file" }
 
     vim.ui.input(input_opts, function(new_file_path)
       utils.clear_prompt()
       if not new_file_path then
         return
       end
 
-      M.rename(node, new_file_path)
+      M.rename(node, prepend .. new_file_path .. append)
       if M.enable_reload then
         require("nvim-tree.actions.reloaders.reloaders").reload_explorer()
       end

lua/nvim-tree/actions/init.lua

@@ -121,6 +121,11 @@ local DEFAULT_MAPPINGS = {
     action = "full_rename",
     desc = "rename a file and omit the filename on input",
   },
+  {
+    key = "e",
+    action = "rename_relative",
+    desc = "rename base name with changing directory or extension",
+  },
   {
     key = "x",
     action = "cut",

lua/nvim-tree/api.lua

@@ -47,6 +47,7 @@ Api.fs.remove = inject_node(require("nvim-tree.actions.fs.remove-file").fn)
 Api.fs.trash = inject_node(require("nvim-tree.actions.fs.trash").fn)
 Api.fs.rename = inject_node(require("nvim-tree.actions.fs.rename-file").fn(false))
 Api.fs.rename_sub = inject_node(require("nvim-tree.actions.fs.rename-file").fn(true))
+Api.fs.rename_relative = inject_node(require("nvim-tree.actions.fs.rename-file").fn(false, true))
 Api.fs.cut = inject_node(require("nvim-tree.actions.fs.copy-paste").cut)
 Api.fs.paste = inject_node(require("nvim-tree.actions.fs.copy-paste").paste)
 Api.fs.clear_clipboard = require("nvim-tree.actions.fs.copy-paste").clear_clipboard