Windows batch script to pack by 7z the source code files of my project excluding some folders or files by regexp

PackSource.cmd

@echo off
setlocal enabledelayedexpansion  

echo Pack project sources to archive.


:SetVars
set SCRIPT_DIR=%~dp0
IF %SCRIPT_DIR:~-1%==\ set SCRIPT_DIR=%SCRIPT_DIR:~0,-1%
rem Must be installed system wide or placed in the same folder
SET ZIP_TOOL=7z
SET PROJECT_NAME=MyApp

:Compress

set ARCHIVE_NAME=!PROJECT_NAME!-src.zip
if exist "!ARCHIVE_NAME!" (
  echo Remove previously created archive
  del /F /Q "!ARCHIVE_NAME!"    
)
echo.
echo Compress...

pu
!ZIP_TOOL! a -tzip "%SCRIPT_DIR%\!ARCHIVE_NAME!" "%SCRIPT_DIR%\*" -xr^^!.svn -xr^^!Doc -xr^^!*MiddleTest\python27.zip -xr^^!*.exe
if errorlevel 0 (   
  echo Compress: OK. 
  echo:
  echo Get you archive here: `%SCRIPT_DIR%\!ARCHIVE_NAME!` 
  exit /b 0    
) 
echo Compress: [ERROR] Code !errorlevel!.                                
exit /b !errorlevel!



exit /b 0



rem ======================================================================
rem SUB PROGRAMS
rem ======================================================================

:: no