Batch file include external file for variables

Question

I have a batch file and I want to include an external file containing some variables (say configuration variables). Is it possible?

Answer 1

:: savevars.bat
:: Use $ to prefix any important variable to save it for future runs.

@ECHO OFF
SETLOCAL

REM Load variables
IF EXIST config.txt FOR /F "delims=" %%A IN (config.txt) DO SET "%%A"

REM Change variables
IF NOT DEFINED $RunCount (
    SET $RunCount=1
) ELSE SET /A $RunCount+=1

REM Display variables
SET $

REM Save variables
SET $>config.txt

ENDLOCAL
PAUSE
EXIT /B

Output:

$RunCount=1

$RunCount=2

$RunCount=3

The technique outlined above can also be used to share variables among multiple batch files.

Source: http://www.incodesystems.com/products/batchfi1.htm