anchor.diff:  
   
   
  -
  -rem ===========================================================================
  -rem   download and unpack python using msiexec
  -rem ===========================================================================
  -
  -if %install_python% == yes call msys_setup_python.bat
  -
  -
  -
  -rem ===========================================================================
  -rem   download git
  -rem ===========================================================================
  -
  -
  -if %install_git% == yes call msys_setup_git.bat
   
   
   
  
positive.code: 
  
  rem ===========================================================================
  rem   download and unpack 7zip using msiexec
  rem ===========================================================================
  
  
negative.code: 
  if %install_expat% == yes call msys_setup_expat.bat
  
  if %install_git% == yes call msys_setup_git.bat
  
  if %install_python% == yes call msys_setup_python.bat
  
  if %install_zlib% == yes call msys_setup_zlib.bat
  
  if %install_libpng% == yes call msys_setup_libpng.bat
  