Recursively find and replace files

Question

What I want to do is following. I want to create some bat file, that will recursively search for files starting from current directory and replace with the file that I provided

Answer 1

The Batch file below start from current directory, recursively search the file given in the first parameter and copy over it (with same name) the file given in second parameter:

@echo off
set targetName=%~NX1
set replacementFile=%~F2
call :processFolder
goto :EOF

:processFolder
rem For each folder in this level
for /D %%a in (*) do (
   rem Enter into it, process it and go back to original
   cd %%a
   if exist "%targetName%" (
      copy "%replacementFile%" "%targetName%" /Y
   )
   call :processFolder
   cd ..
)
exit /B

For example:

app test1.txt c:\data\replacementfile.txt