cosmetics: Use $() instead of ``, the former can be nested more easily.
[libav.git] / version.sh
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1#!/bin/sh
2
123103ca 3# check for SVN revision number
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4revision=$(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)
123103ca 7test $revision && revision=SVN-r$revision
a66d63a9 8
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9# check for git short hash
10if ! test $revision; then
d33a14e4 11 revision=$(cd "$1" && git log -1 --pretty=format:%h)
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12 test $revision && revision=git-$revision
13fi
14
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15# no version number found
16test $revision || revision=UNKNOWN
17
e73db718 18test -n "$3" && revision=$revision-$3
ac63af34 19
123103ca 20NEW_REVISION="#define FFMPEG_VERSION \"$revision\""
d33a14e4 21OLD_REVISION=$(cat version.h 2> /dev/null)
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22
23# Update version.h only on revision changes to avoid spurious rebuilds
24if test "$NEW_REVISION" != "$OLD_REVISION"; then
9e6165b5 25 echo "$NEW_REVISION" > "$2"
f1cc88a5 26fi