get-version-from-release-branch-reusable.yml

name: Get version from release branch (reusable)

on:
  workflow_call:
    outputs:
      VERSION:
        description: "The semantic version x.y.z, e.g.: 1.7.4"
        value: ${{ jobs.create-version.outputs.VERSION }}

jobs:
  create-version:
    name: generate version number
    runs-on: ubuntu-latest
    outputs:
      VERSION: ${{ steps.generate.outputs.VERSION }}

    steps:
      - name: checkout code
        uses: actions/checkout@v4

      - name: Verify that the current is branch is a release branch
        shell: bash
        run: |
          CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
          [[ $CURRENT_BRANCH =~ ^release-([0-9]+)\.([0-9]+)$ ]] || exit 1
          echo "MAJOR=${BASH_REMATCH[1]}" >> $GITHUB_ENV
          echo "MINOR=${BASH_REMATCH[2]}" >> $GITHUB_ENV
          exit 0

      - name: Generate version
        id: generate
        shell: bash
        env:
          MAJOR: ${{ env.MAJOR }}
          MINOR: ${{ env.MINOR }}
        run: |
          TAGS=$(git tag -l "$MAJOR.$MINOR.*")
          if [[ -z $TAGS ]]; then
            PATCH=0
          else
            PATCH=$(( $(echo $TAGS | cut -d '.' -f 3 | sort -n | tail -n 1) + 1))
          fi
          VERSION="${MAJOR}.${MINOR}.${PATCH:-0}"
          echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
          exit 0