gradle.yml

name: Java CI with Gradle

on:
  push:
    branches:
      - main

jobs:
  build-and-release:
    runs-on: ubuntu-latest
    permissions:
      contents: write  # Needed for creating releases

    steps:
    - name: Check out code
      uses: actions/checkout@v4
      with:
        fetch-depth: 0  # Ensure full history is fetched to capture all commits

    - name: Set up JDK 21
      uses: actions/setup-java@v4
      with:
        java-version: '21'
        distribution: 'temurin'

    - name: Extract current version from gradle.properties
      id: get_version
      run: |
        version=$(grep -oP '(?<=mod_version = ).*' gradle.properties)
        echo "mod_version=$version" >> $GITHUB_ENV

    - name: Get latest release version (including pre-releases)
      id: get_latest_release_version
      env:
        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: |
        latest_release_version=$(curl -s -H "Authorization: token $GH_TOKEN" \
          https://api.github.com/repos/${{ github.repository }}/releases \
          | jq -r 'map(select(.prerelease == false and .draft == false)) | sort_by(.created_at) | last | .tag_name')

        if [ "$latest_release_version" = "null" ] || [ -z "$latest_release_version" ]; then
          echo "No previous release found."
          latest_release_version="none"
        else
          echo "Latest release version: $latest_release_version"
        fi

        echo "latest_release_version=$latest_release_version" >> $GITHUB_ENV

    - name: Check if version has changed
      id: version_check
      run: |
        current_version="${{ env.mod_version }}"
        latest_release_version="${{ env.latest_release_version }}"

        if [ "$latest_release_version" = "none" ]; then
          echo "No previous release found. Proceeding with build."
          echo "build_required=true" >> $GITHUB_ENV
        elif [ "$current_version" = "$latest_release_version" ]; then
          echo "Version has not changed. Skipping build."
          echo "build_required=false" >> $GITHUB_ENV
        else
          echo "Version has changed from $latest_release_version to $current_version. Proceeding with build."
          echo "build_required=true" >> $GITHUB_ENV

    - name: Build with Gradle
      if: env.build_required == 'true'
      run: ./gradlew build --no-daemon

    - name: Generate Changelog and Contributors List
      if: env.build_required == 'true'
      id: generate_changelog_contributors
      run: |
        if [ "${{ env.latest_release_version }}" = "none" ]; then
          changelog=$(git log --pretty=format:"- %h - %s")
        else
          last_release_date=$(curl -s -H "Authorization: token $GH_TOKEN" \
            https://api.github.com/repos/${{ github.repository }}/releases/tags/${{ env.latest_release_version }} \
            | jq -r '.created_at')
          changelog=$(git log --since="$last_release_date" --pretty=format:"- %h - %s")
        fi

        # Generate contributors list
        contributors=$(git shortlog -sn --since="$last_release_date" | awk '{print NR ". " $2 " (" $1 " commits)"}')

        echo "changelog<<EOF" >> $GITHUB_ENV
        echo "$changelog" >> $GITHUB_ENV
        echo "EOF" >> $GITHUB_ENV

        echo "contributors<<EOF" >> $GITHUB_ENV
        echo "$contributors" >> $GITHUB_ENV
        echo "EOF" >> $GITHUB_ENV

    - name: Create GitHub Release and Upload Artifacts
      if: env.build_required == 'true'
      uses: ncipollo/release-action@v1.14.0
      with:
        tag: ${{ env.mod_version }}
        name: ${{ env.mod_version }}
        body: |
          ## Release v${{ env.mod_version }}

          ### Contributors:
          ${{ env.contributors }}

          ### Changelog:
          ${{ env.changelog }}
        draft: false
        prerelease: false
        artifacts: ./build/libs/XAT-${{ env.mod_version }}.jar
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}