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#!/bin/sh
# Determine the version string to build into a binary.
# When building in the git repository, we can use the output
# of "git describe" which gives an unequivocal answer.
#
# Failing that, we use the contents of the VERSION file
# which has a set of references substituted into it by git.
# If we can find one which matches $v[0-9].* then we assume it's
# a version-number tag, else we just use the whole string.
# If there is more than one v[0-9].* tag, sort them and use the
# first. This favours, eg v2.63 over 2.63rc6.
if which git >/dev/null 2>&1 && \
([ -d $1/.git ] || grep '^gitdir:' $1/.git >/dev/null 2>&1); then
cd $1; git describe | sed 's/^v//'
elif grep '\$Format:%d\$' $1/VERSION >/dev/null 2>&1; then
# unsubstituted VERSION, but no git available.
echo UNKNOWN
else
vers=`cat $1/VERSION | sed 's/[(), ]/,/ g' | tr ',' '\n' | grep ^v[0-9]`
if [ $? -eq 0 ]; then
echo "${vers}" | sort -r | head -n 1 | sed 's/^v//'
else
cat $1/VERSION
fi
fi
exit 0
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