Correctly handle empty frames
[libav.git] / version.sh
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1#!/bin/sh
2
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3# check for SVN revision number
4revision=`cd "$1" && LC_ALL=C svn info 2> /dev/null | grep Revision | cut -d' ' -f2`
5test $revision || revision=`cd "$1" && grep revision .svn/entries 2>/dev/null | cut -d '"' -f2`
6test $revision || revision=`cd "$1" && sed -n -e '/^dir$/{n;p;q}' .svn/entries 2>/dev/null`
7test $revision && revision=SVN-r$revision
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9# check for git short hash
10if ! test $revision; then
11 revision=`cd "$1" && git log -1 --pretty=format:%h`
12 test $revision && revision=git-$revision
13fi
14
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15# no version number found
16test $revision || revision=UNKNOWN
17
18NEW_REVISION="#define FFMPEG_VERSION \"$revision\""
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19OLD_REVISION=`cat version.h 2> /dev/null`
20
21# Update version.h only on revision changes to avoid spurious rebuilds
22if test "$NEW_REVISION" != "$OLD_REVISION"; then
23 echo "$NEW_REVISION" > version.h
24fi