1#!/bin/sh 2 3# check for git short hash 4revision=$(cd "$1" && git describe --always 2> /dev/null) 5 6# no revision number found 7test "$revision" || revision=$(cd "$1" && cat RELEASE 2> /dev/null) 8 9# releases extract the version number from the VERSION file 10version=$(cd "$1" && cat VERSION 2> /dev/null) 11test "$version" || version=$revision 12 13test -n "$3" && version=$version-$3 14 15if [ -z "$2" ]; then 16 echo "$version" 17 exit 18fi 19 20NEW_REVISION="#define LIBAV_VERSION \"$version\"" 21OLD_REVISION=$(cat version.h 2> /dev/null) 22 23# Update version.h only on revision changes to avoid spurious rebuilds 24if test "$NEW_REVISION" != "$OLD_REVISION"; then 25 echo "$NEW_REVISION" > "$2" 26fi 27