Batch file how to call another batch file at a specified label or call and immediately goto a certain label?

Question

I am trying to figure out how file1.bat can call file2.bat at a specified label.

I figured I can do it like this:

File1.bat

:config
         


        

Answer 1

As I said in the comment that I attached to my answer, I awarded the bounty, because @NicoBerrogorry took the time to devise an excellent solution, and provide a complete write-up.

Nevertheless, there was one syntax error that he overlooked, probably because he doesn't use CMD files, while I have almost entirely abandoned BAT files. The following CALLAT script incorporates one correction and four enhancements.

1. It handles fully specified commands, that is, commands that specify the file name with its extension.
2. It corrects the oversight in the original that caused it to ignore CMD files.
3. When the target file simply cannot be found, it displays an error message.
4. The for loop that appends the file one line at a time is replaced with a decidedly old-school COPY command that appends the target script file to the two-line preamble that makes the whole thing work. In case you have forgotten or didn't know about it, the > NUL: at the end of the copy command discards the "1 file copied" message.
5. While the original fulfilled its mission, it didn't clean up after itself; this version does so, by removing the temporary script file and the temporary directory in which it is created.

@ECHO OFF
SETLOCAL EnableDelayedExpansion

rem Create a folder in the temporary files directory.
IF NOT EXIST "%TEMP%\CALLAT\" MKDIR "%TEMP%\CALLAT\"

rem Chose a name for the modified script.
SET MODIFIED_SCRIPT="%TEMP%\CALLAT\modified_%1.bat"

rem Convert the called script name to the corresponding .bat
rem or .cmd full path to the called script.

rem Then load the script. - 2017/05/08 - DAG - The second if exist test duplicated the first. Instead, it must evaluate for the .CMD extension.

SET "COMMAND_FILE=%~dp0%1"
IF EXIST "%COMMAND_FILE%.bat" (
    SET "COMMAND_FILE=%COMMAND_FILE%.bat"
) ELSE IF EXIST "%COMMAND_FILE%.cmd" (
    SET "COMMAND_FILE=%COMMAND_FILE%.cmd"
) else if exist "%COMMAND_FILE%" (
	echo INFO: Using "%COMMAND_FILE%"
) else (
	echo ERROR: Cannot find script file %COMMAND_FILE%.bat
	echo                             or %COMMAND_FILE%.cmd
)

rem Add some lines to go directly to the desired label.
ECHO @ECHO OFF> %MODIFIED_SCRIPT%
ECHO GOTO %2>> %MODIFIED_SCRIPT%

rem Append the called script.
copy %MODIFIED_SCRIPT%+%COMMAND_FILE% %MODIFIED_SCRIPT% > NUL:

rem Call the modified script.
CALL %MODIFIED_SCRIPT%

rem Pack out your trash. When a script ends, you get an ENDLOCAL for free.
del %MODIFIED_SCRIPT%
rd "%TEMP%\CALLAT\"

Finally, this version of CALLAT eliminates a redundant ECHO OFF and the concluding ENDLOCAL, which I discovered long ago is unnecessary, because exiting a script implies ENDLOCAL.

Since virtually all of my production scripts inhabit a single directory that is accessible via the PATH directory list, the requirement that both scripts inhabit the same directory isn't a significant hindrance. Moreover, with a little more work, it could almost certainly be relaxed. I'll leave that as an exercise for interested readers, but I'll give you one clue; it might involve calling an internal subroutine that can parse the name of the input file by leveraging the technique described [in Command Line Parameters].1

The script shown above is about to find its way into production.