update-maven-repo.yml

# This workflow updates the MM Maven Repo on push to master 
name: Update Maven Repo

on:
  push:
    branches: [ master ]
    paths:
    - 'megamek/src/**'
    - 'megamek/i18n/**'
    - 'megamek/resources/**'

jobs:
  update_maven_repo:
    runs-on: ${{ matrix.os }}

    # Run this job once for each combination in the matrix below.
    strategy:
      matrix:
        os: [ ubuntu-latest ] # For Maven Repository Update running on *nix is sufficient
        java-distribution: [ temurin ]
        java-version: [ 17 ]

    steps:
    # Put the MM repo in a subfolder to make updating the Maven repo easier
    - uses: actions/checkout@v3
      with:
        path: megamek

    # Setup the requested Java Distribution and Version from the matrix
    - name: Set up ${{ matrix.java-distribution }} JDK ${{ matrix.java-version }}
      uses: actions/setup-java@v3
      with:
        distribution: ${{ matrix.java-distribution }}
        java-version: ${{ matrix.java-version }}

    # Make sure we can execute the Gradle wrapper
    - name: Grant execute permission for gradlew (*nix or MacOS)
      working-directory: megamek
      run: chmod +x gradlew
      if: runner.os != 'Windows'

    # Create the actual maven repo bits with Gradle
    - name: Publish Maven Repo with Gradle
      working-directory: megamek
      run: ./gradlew publishPublishMMLibraryPublicationToMavenRepository
    
    # Get the current Maven repo contents
    - name: Checkout Maven Repo
      if: github.repository == 'MegaMek/megamek'
      uses: actions/checkout@v3
      with:
        repository: MegaMek/mavenrepo
        path: mavenrepo
        
    # Create an update
    - name: Copy Maven Outputs to Repo
      if: github.repository == 'MegaMek/megamek'
      working-directory: megamek/megamek/build/mavenrepo/
      run: |
        cp -r . ../../../../mavenrepo/
        
    # In case we run into an issue, use git status to help us understand what happened.
    - name: Inspect git status output
      if: github.repository == 'MegaMek/megamek'
      working-directory: mavenrepo
      run: |
        git status
        
    # Add the changes under the username and email of the user who pushed the code
    - name: Commit changes to the Maven Repo
      if: github.repository == 'MegaMek/megamek'
      working-directory: mavenrepo
      run: |
        git add .
        git config user.email ${{ github.event.pusher.email }}
        git config user.name ${{ github.event.pusher.name }}
        git commit -m "MegaMek ${{ github.event.after }}" -m "${{ github.event.compare }}"
        
    # Use an SSH deploy key (with write privs) to update the maven repo
    - name: Setup SSH and Push changes to the Maven Repo
      if: github.repository == 'MegaMek/megamek'
      working-directory: mavenrepo
      run: |
        eval "$(ssh-agent -s)"
        ssh-add - <<< "${{ secrets.MAVEN_REPO_DEPLOY_KEY }}"
        git push "git@github.com:MegaMek/mavenrepo.git" HEAD:master