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build/util/version.sh

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get_version_field() {
local field=$(echo "$1" | cut -d. -f$2 | sed 's/^0*//')
if [ -z $field ]; then
field="0"
fi
case "$field" in
[a-zA-Z]) printf '%d' "'$field'" ;;
*) echo "$field" ;;
esac
}
verson_find_greatest() {
local version i v V
local found="$1"
while read version; do
for i in 1 2 3 4; do
v=$(get_version_field $version $i)
V=$(get_version_field $found $i)
[ $v -ge $V ] || break
if [ $v -gt $V ]; then
found="$version"
break
fi
done
done
if [ "$found" != "$1" ]; then
echo "$found"
fi
}