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#!/bin/sh
# check for SVN revision number
revision=$(cd "$1" && cat snapshot_version 2> /dev/null)
test "$revision" || revision=$(cd "$1" && LC_ALL=C svn info 2> /dev/null | grep "Last Changed Rev" | cut -d' ' -f4)
test "$revision" || revision=$(cd "$1" && grep committed-rev .svn/entries 2>/dev/null | head -n 1 | cut -d '"' -f2)
test "$revision" || revision=$(cd "$1" && sed -n -e '/^dir$/{n
p
q
}' .svn/entries 2>/dev/null)
test "$revision" && revision=SVN-r$revision
# check for git svn revision number
if ! test "$revision"; then
revision=$(cd "$1" && git svn find-rev HEAD 2> /dev/null)
test "$revision" && revision=git-svn-r$revision
fi
# check for git short hash
if ! test "$revision"; then
revision=$(cd "$1" && git describe --tags --match N 2> /dev/null)
test "$revision" && revision=git-$revision
fi
# no revision number found
test "$revision" || revision=UNKNOWN
# releases extract the version number from the VERSION file
version=$(cd "$1" && cat VERSION 2> /dev/null)
test "$version" || version=$revision
test -n "$3" && version=$version-$3
if [ -z "$2" ]; then
echo "$version"
exit
fi
NEW_REVISION="#define FFMPEG_VERSION \"$version\""
OLD_REVISION=$(cat version.h 2> /dev/null)
# Update version.h only on revision changes to avoid spurious rebuilds
if test "$NEW_REVISION" != "$OLD_REVISION"; then
echo "$NEW_REVISION" > "$2"
fi
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