anchor.diff: -@echo off 
  +@echo off
   set OLDDIR=%CD%
   cd /d %~dp0
   REM ============================================
  
positive.code: REM ============================================
  echo Check NSIS is in your PATH
  REM ============================================
  if "%PROCESSOR_ARCHITECTURE%" == "AMD64" ( 
      SET "PRGROOT=%programfiles(x86)%" 
  ) 
  if "%PROCESSOR_ARCHITECTURE%" == "x86" ( 
      SET PRGROOT=%programfiles% 
  )
  
  set NSIS_EXEC="%PRGROOT%\NSIS\makensis.exe"
  
negative.code: if not exist include/gpac/revision.h goto Abort
  
  REM check if found a local commit which has not been pushed
  for /f "delims=" %%a in ('git diff FETCH_HEAD') do @set diff=%%a
  echo diff = %diff%
  if not "%diff%"=="" goto RevisionAbort
  
  REM execute git and check if the result if found within revision.h
  for /f "delims=" %%a in ('git describe --tags --long') do @set VERSION=%%a
  