name: Parse and Validate a version string or tag

on:
  workflow_call:
    inputs:
      version:
        description: "A specific version to use"
        required: false
        type: string
    outputs:
      semVerStr:
        description: "The full version string."
        value: ${{ jobs.determine-version.outputs.semVerStr}}
      semVerNum:
        description: "The numerical part of the version string"
        value: ${{ jobs.determine-version.outputs.semVerNum}}
      revNum:
        description: "The revision number"
        value: ${{ jobs.determine-version.outputs.revNum}}

env:
  JAVA_VERSION: 19
  JAVA_DIST: 'temurin'
  JAVA_CACHE: 'maven'

jobs:
  determine-version:
    name: 'Determines the version following semver'
    runs-on: ubuntu-latest
    outputs:
      semVerNum: ${{ steps.versions.outputs.semVerNum }}
      semVerStr: ${{ steps.versions.outputs.semVerStr }}
      revNum: ${{ steps.versions.outputs.revNum }}
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Setup Java
        uses: actions/setup-java@v3
        with:
          distribution: ${{ env.JAVA_DIST }}
          java-version: ${{ env.JAVA_VERSION }}
          cache: ${{ env.JAVA_CACHE }}
      - id: versions
        name: Get version information # TODO: is Github ref inherited when called from super workflow?
        run: |
          if [[ $GITHUB_REF =~ refs/tags/[0-9]+\.[0-9]+\.[0-9]+.* ]]; then
            SEM_VER_STR=${GITHUB_REF##*/}
          elif [[ "${{ inputs.version }}" =~ [0-9]+\.[0-9]+\.[0-9]+.* ]]; then
            SEM_VER_STR="${{ github.event.inputs.version }}"
          else
            SEM_VER_STR=`mvn help:evaluate -Dexpression=project.version -q -DforceStdout`
          fi
          SEM_VER_NUM=`echo ${SEM_VER_STR} | sed -E 's/([0-9]+\.[0-9]+\.[0-9]+).*/\1/'`
          REVCOUNT=`git rev-list --count HEAD`
          echo "::set-output name=semVerStr::${SEM_VER_STR}"
          echo "::set-output name=semVerNum::${SEM_VER_NUM}"
          echo "::set-output name=revNum::${REVCOUNT}"
      - name: Validate Version
        uses: skymatic/semver-validation-action@v1
        with:
          version: ${{ steps.versions.outputs.semVerStr }}