template_release_version.yml

name: Release Version Detector

on:
  workflow_call:
    inputs:
      tag-prefix:
        required: false
        type: string
        default: 'v'
      tag-suffix:
        required: false
        type: string
        default: ''
      format:
        required: false
        type: string
        default: 'weekly'
    outputs:
      new_version:
        value: ${{ jobs.new_version.outputs.new_version }}
      new_tag:
        value: ${{ jobs.new_version.outputs.new_tag }}

jobs:
  new_version:
    name: Get new release version
    runs-on: ubuntu-slim
    permissions:
      contents: read

    outputs:
      new_version: ${{ steps.set_version.outputs.next_version }}
      new_tag: ${{ steps.set_version.outputs.next_tag }}

    steps:
      - name: Detect new release version
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        id: set_version
        run: |
          TAG_PREFIX=${{ inputs['tag-prefix'] }}
          TAG_SUFFIX=${{ inputs['tag-suffix'] }}
          DATE=$(date +"%Y%m%d")
          YEAR=$(date +"%Y")
          WEEK=$(date +"%-V")
          QUARTER=$(date "+%q")

          if [ ${{ inputs.format }} == 'quarterly' ] ; then
            MINOR=$QUARTER
          else
            MINOR=$WEEK
          fi

          if [[ $(gh release view -R ${{ github.repository }} 2>&1) =~ "release not found" ]]; then
            COUNTER=0
          else
            # fetch last tag name from github releases which are not drafts or pre-releases and starts with the given prefix
            OLD_TAG_NAME=$(gh release list -R ${{ github.repository }} --limit 100 --exclude-drafts --exclude-pre-releases --json tagName --jq "[.[] | select(.tagName | startswith(\"${TAG_PREFIX}\") and endswith(\"${TAG_SUFFIX}\"))] | .[0].tagName")

            echo "Last tag name: ${OLD_TAG_NAME}"

            # remove prefix and suffix
            OLD_VERSION=${OLD_TAG_NAME#${TAG_PREFIX}}
            OLD_VERSION=${OLD_VERSION%${TAG_SUFFIX}}

            echo "Last version: ${OLD_VERSION}"

            PARTS=(${OLD_VERSION//./ })
            COUNTER=${PARTS[2]}
            MINOR_FROM_LAST_TAG=${PARTS[1]}

            # if we have a new week and the weekly release we start to count from 0
            if [ ${MINOR_FROM_LAST_TAG} != ${WEEK} ] && [ ${{ inputs.format }} == 'weekly' ]; then
              COUNTER=0
            fi

            # if we have a new quarter and the quarterly release we start to count from 0
            if [ ${MINOR_FROM_LAST_TAG} != ${QUARTER} ] && [ ${{ inputs.format }} == 'quarterly' ]; then
              COUNTER=0
            fi

            # check if valid tag
            pattern="[0-9]+.[0-9]+.[0-9]+$"
            if ! [[ $OLD_VERSION =~ $pattern ]]; then
              COUNTER=0
            fi
          fi

          # increase Version
          COUNTER=$((COUNTER+1))

          NEW_VERSION="${YEAR}.${MINOR}.${COUNTER}"
          NEW_TAG="${TAG_PREFIX}${NEW_VERSION}${TAG_SUFFIX}"

          echo "Next version: ${NEW_VERSION}"
          echo "Next tag: ${NEW_TAG}"

          echo "next_version=${NEW_VERSION}" >> $GITHUB_OUTPUT
          echo "next_tag=${NEW_TAG}" >> $GITHUB_OUTPUT
        shell: bash