entrypoint.sh

#!/bin/bash

# NOTE: this file refs to https://github.com/line/headver/blob/main/examples/bash.md.

version=""
yearweek=""
year=`date +%Y`
weeknumber=`date +%V` # ISO Standard week number

# sanitize inputs
for ARGUMENT in "$@"
do
    KEY=$(echo $ARGUMENT | cut -f1 -d=)
    VALUE=$(echo $ARGUMENT | cut -f2 -d=)

    case "$KEY" in
            --override_version)
              override_version=${VALUE} ;;

            *)
              echo "ERROR: unknown parameter \"$KEY\""
              exit 1 ;;
    esac
done

echo "fetching latest tags from remote...";
git fetch --depth=1 origin +refs/tags/*:refs/tags/*

# this prevents from having 1801 at the last week of the year 2019. It should be 1901.
if [ ${weeknumber} -eq 1 ] && [ `date -u -d ${forced_date} +%-d` -gt 20 ]; then
  year=$(expr ${year} + 1)
fi

# this prevents from having 1053 at the last week of the year 2010. It should be 0953.
if [ ${weeknumber} -ge 52 ] && [ `date -u -d ${forced_date} +%-d` -le 7 ]; then
    year=$(expr ${year} - 1)
fi

yearweek="${year:2:2}${weeknumber}"

if [ -z ${override_version} ]; then
    head=$(cat ./package.json | grep -m 1 headVersion | sed 's/[^0-9.]//g')

    printf "current the calver headVersion pasred from package.json: $head\n"

    lastest=`git tag --sort=committerdate | grep -E '^[0-9]' | tail -1`
    latestHead=`echo $lastest | cut -d. -f1`
    latestYearweek=`echo $lastest | cut -d. -f2`
    latestBuild=`echo $lastest | cut -d. -f3`

    printf "lastHead: $latestHead $h\n"
    printf "lastYearweek: $latestYearweek\n"
    printf "lastBuild: $latestBuild\n"

    printf "latest $latestHead.$latestYearweek.$latestBuild\n"

    if [ -z ${lastest} ]; then
        build="0"
        echo "- Warning: There is no tag. set to default.";
    else
        if [ -z ${latestBuild} ]; then
            build="0"
            echo "- Warning: no build value. set to 0 by default."
        else
            build=$(($latestBuild + 1))
        fi

        if [ "$yearweek" != "$latestYearweek" ]; then
            build="0"
            echo "- Warning: yearweek is changed"
        fi
    fi

    version="$head.$yearweek.$build"
else
    echo "- Warning: head, build, suffix values will be ignored"
    version=${override_version}
fi

printf "version: $version\n"

git tag "$version"
git push origin --tags