3 # check for git short hash
4 if ! test "$revision"; then
5 revision=$(cd "$1" && git describe --tags --match N 2> /dev/null)
6 test "$revision" && revision=git-$revision
9 # no revision number found
10 test "$revision" || revision=UNKNOWN
12 # releases extract the version number from the VERSION file
13 version=$(cd "$1" && cat VERSION 2> /dev/null)
14 test "$version" || version=$revision
16 test -n "$3" && version=$version-$3
23 NEW_REVISION="#define FFMPEG_VERSION \"$version\""
24 OLD_REVISION=$(cat version.h 2> /dev/null)
26 # Update version.h only on revision changes to avoid spurious rebuilds
27 if test "$NEW_REVISION" != "$OLD_REVISION"; then
28 echo "$NEW_REVISION" > "$2"