build-jar.yml

name: Build jar-file of latest version containing all dependencies

on:
  workflow_dispatch:
  pull_request:
    branches:
      - master
    paths: # only build new jar file if pom.xml or java sources have changed
      - pom.xml
      - src/main/**

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Set up JDK 11
        uses: actions/setup-java@v3
        with:
          distribution: 'adopt' # You can choose other distributions like 'zulu' or 'temurin'
          java-version: '11'

      - name: Pull branch
        run: |
          git checkout -b ${{ github.event.pull_request.head.ref }}
          git pull origin ${{ github.event.pull_request.head.ref }} --rebase || echo "No changes to pull"

      - name: Build and package JAR with dependencies
        run: mvn clean package

      - name: commit changes of jar file
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          mkdir -p latest-version
          
          if ! cmp -s target/*-jar-with-dependencies.jar latest-version/mongodb-performance-test.jar; then
            
            mv target/*-jar-with-dependencies.jar latest-version/mongodb-performance-test.jar
            ls -al latest-version/
          
            VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)
          
            git config --local user.email "github-actions@idealo.de"
            git config --local user.name "github-actions[bot]"
            
            git add latest-version/mongodb-performance-test.jar
            git commit -m "Add latest version ($VERSION) of mongodb-performance-test.jar"
            git push origin ${{ github.event.pull_request.head.ref }}
          
            # Delete the local tag if it exists
            git tag -d "v$VERSION" || true  # Ignore if the tag doesn't exist
            git tag -a "v$VERSION" -m "Tagging version $VERSION"
            git push origin :refs/tags/v$VERSION || true  # delete remote tag, if exists
            git push origin "v$VERSION"  # create remote tag
          
            echo "### Version updated to $VERSION" >> $GITHUB_STEP_SUMMARY
            echo "The [latest-version/mongodb-performance-test.jar](https://github.com/idealo/mongodb-performance-test/tree/master/latest-version/mongodb-performance-test.jar) is now $VERSION" >> $GITHUB_STEP_SUMMARY
          else
            echo "### Build unchanged" >> $GITHUB_STEP_SUMMARY
            echo "The [latest-version/mongodb-performance-test.jar](https://github.com/idealo/mongodb-performance-test/tree/master/latest-version/mongodb-performance-test.jar) is unchanged" >> $GITHUB_STEP_SUMMARY          
          fi