VersionInformationInFile.nsi

!define PRODUCT_MAJOR "1"
!define PRODUCT_MINOR "0"
!define /date PRODUCT_TIMESTAMP "%y%j"

!define BUILDFILE "LastBuild.txt" 
!include  "${BUILDFILE}"
!if ${LAST_TIMESTAMP} != ${PRODUCT_TIMESTAMP}	
	!define NEW_BUILD_NUMBER 0
!else
	!define /math NEW_BUILD_NUMBER ${LAST_BUILD_NUMBER} + 1
!endif

!delfile "${BUILDFILE}"
!appendfile "${BUILDFILE}" "!define LAST_BUILD_NUMBER ${NEW_BUILD_NUMBER}$\n"
!appendfile "${BUILDFILE}" "!define LAST_TIMESTAMP ${PRODUCT_TIMESTAMP}$\n"
!define PRODUCT_BUILD "${NEW_BUILD_NUMBER}"
!undef BUILDFILE
!undef NEW_BUILD_NUMBER
!undef LAST_BUILD_NUMBER