Config Customization at Build Time in Visual Studio

ECHO OFF
:: ConfigMerge.bat 
:: by Jim Rogers
:: Published on CodeProject.com
:: http://www.jimandkatrin.com/codeblog/2008/06/config-merge.html

:: Tildes strip the quotes off the parameters
SET _path=%~1
SET _config=%_path%%~2
SET _target=%_path%%~3

:: First file to do a diff against, if it exists
SET _diff=%_path%%~4

IF NOT EXIST "%_config%" GOTO NOCONFIG

IF EXIST "%_diff%" GOTO DOMERGE

:: Optional second file to do a diff against, if it exists
IF NOT [%~5]==[] (
	SET _diff=%_path%%~5
	IF EXIST "%_diff%" GOTO DOMERGE
)

ECHO Config file not modified

IF NOT "%_config%"=="%_target%" (
	ECHO Copying config file to target
	COPY "%_config%" "%_target%"
)

GOTO END

:DOMERGE
:: Modify the config with the difference file
"%_path%..\ConfigMerge.exe" "%_config%" "%_diff%" "%_target%"
:: If ConfigMerge.exe reports an exception, pass this up to visual studio
IF ERRORLEVEL 1 EXIT 1
GOTO END

:NOCONFIG
:: Config file was not found - probably problem setting up the prebuild
ECHO Config file %_configFile% not found

:END
EXIT 0