@echo off

cd %1

setlocal enabledelayedexpansion

set HEADFILE=.git\HEAD

set HASHFILE=0

if exist %HEADFILE% (

for /F "tokens=4 delims=/:" %%a in ('type %HEADFILE%') do set HEADBRANCH=%%a

set HASHFILE=.git\refs\heads\!HEADBRANCH!

echo Found Git HEAD file: %HEADFILE%

echo Git HEAD branch: !HEADBRANCH!

echo Git HASH file: !HASHFILE!

call :USEHASH

) else (

echo No head file :(

call :USENULL

)

goto :EOF

:USENULL

set GITHASH=0000000000000000000000000000000000000000

goto :WRITEGITVERSIONHEADER

:USEHASH

for /f %%i in ('type !HASHFILE!') do set GITHASH=%%i

goto :WRITEGITVERSIONHEADER

:WRITEGITVERSIONHEADER

echo // File contains Git commit ID SHA1 present at buildtime (prebuild.cmd) > GitVersion.h

echo const char *gitversion = "%GITHASH%"; >> GitVersion.h

echo Current Git HASH: %GITHASH%

goto :FINISHED

:FINISHED

echo GitVersion.h written...