Replace old file with new file

Question

I am trying to write a script to replace old files content with new files content which is appearing in the following format:

Old file : something.txt
New file : s

Answer 1

Invalid question Invalid answer

source 1

@echo off
set FOLDER_PATH=D:\test
cd /d "%FOLDER_PATH%"
ren "*.txt.new" "*.txt"

source 2

@echo off
set FOLDER_PATH=D:\test
cd /d "%FOLDER_PATH%"
ren "*.txt" "*.txt.new"

Answer 2

1. You missed a \in %FOLDER_PATH%\*.
2. You want to rename *.new files only, so why not using this pattern rather than *? If you are interested in files matching the pattern *.txt.new, then specify this instead of *.
3. There is no need for variable basename; simply use %%~nf to remove the (last) suffix (.new).
4. The ren command throws an error in case the target file already exists; since you want it to be overwritten, use move /Y instead. Add > nul to hide the summary 1 file(s) moved..
5. Remove the if query after having resolved item 2.

All in all, your script can be reduced to:

@echo off
set "FOLDER_PATH=D:\test"
rem // Ensure to specify the correct pattern, `*.new` or `*.txt.new`:
for %%f in ("%FOLDER_PATH%\*.txt.new") do (
    > nul move /Y "%%~f" "%%~nf"
)
pause

Answer 3

@echo off
setlocal
set FOLDER_PATH=D:\test
for %%f in (%FOLDER_PATH%\*.new) do if "%%~ff" neq "%~f0" (
    ECHO move /Y "%%~ff" "%%~dpnf"
)
PAUSE

or

@echo off
setlocal
set FOLDER_PATH=D:\test
for %%f in (%FOLDER_PATH%\*.new) do if "%%~ff" neq "%~f0" (
    if exist "%%~dpnf" ECHO del "%%~dpnf"
    ECHO rename "%%~ff" "%%~nf"
)
PAUSE

Note that operational move (del and rename) commands are merely ECHOed for debugging purposes.

Also note that if "%%~ff" neq "%~f0" could be omitted iterating *.new files as %~f0 has an extension of .bat or .cmd (try echo %~x0 %~f0).

Resources (required reading):

• (command reference) An A-Z Index of the Windows CMD command line
• (additional particularities) Windows CMD Shell Command Line Syntax
• (%~ff etc. special page) Command Line arguments (Parameters)
• (>, 2>&1 etc. special page) Redirection