How recursively rename file extensions

Question

I have a lot of *.lub.lua files, and I want them to have only the .lua extension. I've used the for /r %%x in (*.lub.lua) do if exist "%%x" ren "%%x" *.lua but it doesn't take the .lub part away. What should I do?

Answer 1

@echo off
setlocal EnableDelayedExpansion

for /R %%x in (*.lub.lua) do (
   set name=%%~Nx
   ECHO ren "%%x" "!name:.lub=.lua!"
)

This program just display the ren commands; if they are correct, remove the ECHO part in order to execute they.

Answer 2

@echo off
for /r %%a in (*.lub.lua) do for %%b in ("%%~na") do echo(ren "%%a" "%%~nb.lua"

The required REN commands are merely ECHO ed for testing purposes. After you've verified that the commands are correct , change ECHO(REN to REN to actually rename the files.