release.yml

name: Release on tag
on:
  push:
    tags:
      - '**'

jobs:
  create-release:
    runs-on: ubuntu-latest
    steps:
    - name: Create Release
      id: create_release
      uses: actions/create-release@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        tag_name: ${{ github.ref }}
        release_name: Release ${{ github.ref }}
        draft: false
        prerelease: false
    
    - name: Set output variables
      id: export_vars
      run: |
        export RELEASE_UPLOAD_URL="${{ steps.create_release.outputs.upload_url }}"
        echo "::set-output name=release_upload_url::${RELEASE_UPLOAD_URL}"

    outputs:
      release_upload_url: ${{ steps.export_vars.outputs.release_upload_url }}

  build-java-11:
    needs: create-release
    runs-on: ubuntu-latest
    steps:
    #Checkout
    - uses: actions/checkout@v2

    #Setup Java 16
    - name: Set up Java 16
      uses: actions/setup-java@v1
      with:
        java-version: 1.16

    #Apply permissions for Gradle, so that ./gradlew can run
    - name: Grant execute permission for gradlew
      run: chmod +x gradlew

    #Build the JAR 
    - name: Build with Gradle
      run: ./gradlew ghActions

    #Extract version number
    - name: Extract version number
      run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV

    #Extract repository name
    - name: Extract repository name
      run: echo "REPOSITORY_NAME=$(echo "$GITHUB_REPOSITORY" | awk -F / '{print $2}' | sed -e "s/:refs//")" >> $GITHUB_ENV

    #Attach compiled JAR to ReleaseS
    - name: Attach JAR to Release
      id: upload_release_asset
      uses: actions/upload-release-asset@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
         upload_url: ${{ needs.create-release.outputs.release_upload_url }}
         asset_path: actions/output.jar
         asset_name: ${{ env.REPOSITORY_NAME }}-${{ env.RELEASE_VERSION }}-RELEASE.jar
         asset_content_type: application/java-archive