version.sh 678 Bytes
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#!/bin/sh

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# check for git short hash
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revision=$(cd "$1" && git describe --always 2> /dev/null)
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# no revision number found
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test "$revision" || revision=$(cd "$1" && cat RELEASE 2> /dev/null)
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# releases extract the version number from the VERSION file
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version=$(cd "$1" && cat VERSION 2> /dev/null)
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test "$version" || version=$revision
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test -n "$3" && version=$version-$3

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if [ -z "$2" ]; then
    echo "$version"
    exit
fi

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NEW_REVISION="#define LIBAV_VERSION \"$version\""
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OLD_REVISION=$(cat version.h 2> /dev/null)
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# Update version.h only on revision changes to avoid spurious rebuilds
if test "$NEW_REVISION" != "$OLD_REVISION"; then
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    echo "$NEW_REVISION" > "$2"
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fi