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#!/bin/bash
# compose: no-hooks
upstream_version="$1"
version="${upstream_version/./}"
read -r year_month major minor patch <<< ${version//./ }
if ! [ "${#patch}" == 1 ]; then
echo "Error: build number is not a single digit: '${patch}' (upstream: '${upstream_version}')" >&2
exit 1
fi
if [ "${#major}" -gt 2 ]; then
echo "Error: major number is more than 2 digits: '${major}' (upstream: '${upstream_version}')" >&2
exit 1
fi
major=$(printf "%02d" ${major})
echo "${year_month}${major}.${minor}.${patch}"