build_scheduled.yml

name: 'build scheduled'

on:
  workflow_dispatch:
  schedule:
    - cron: "0 */12 * * *" # every 12 hours

jobs:
  get_all_versions:
    runs-on: ubuntu-latest
    outputs:
      versions: ${{ steps.get_versions.outputs.versions }}
      latest: ${{ steps.find_latest.outputs.latest }}
    steps:
      - name: get available versions
        id: get_versions
        run: |
          curl -s -o versions.json "https://api.papermc.io/v2/projects/paper"
          VERSIONS=$(jq -c '[.versions | nth(-3, -2, -1)]' versions.json)
          echo "versions=$VERSIONS" >> "$GITHUB_OUTPUT"

      - name: find latest
        id: find_latest
        run: |
          for VERSION in $(echo '${{ steps.get_versions.outputs.versions }}' | jq -r '.[]');
          do
            echo "check for ${VERSION}"
            curl -s -o "${VERSION}.json" "https://api.papermc.io/v2/projects/paper/versions/${VERSION}/builds"
            HAS_STABLE=$(jq 'last(.builds[] | select(.channel=="default")).build' "${VERSION}.json")
            if  [[ "$HAS_STABLE" =~ ^[0-9]+$ ]]; then
              LATEST="${VERSION}"
            fi
          done
          
          echo "latest=$LATEST" >> "$GITHUB_OUTPUT"

      - name: show output
        run: |
          echo "versions: ${{ steps.get_versions.outputs.versions }}"
          echo "latest: ${{ steps.find_latest.outputs.latest }}"

  build_for_version:
    runs-on: ubuntu-latest
    needs: get_all_versions
    permissions: write-all
    strategy:
      matrix:
        versions: ${{ fromJson(needs.get_all_versions.outputs.versions) }}
    steps:
      - name: get latest build
        id: latest_build
        run: |
          BUILDS=$(curl -s -o builds.json https://api.papermc.io/v2/projects/paper/versions/${{ matrix.versions }}/builds)
          BUILD_STABLE=$(jq 'last(.builds[] | select(.channel=="default")).build' builds.json)
          BUILD_EXPERIMENTAL=$(jq 'last(.builds[] | select(.channel=="experimental")).build' builds.json)
          echo "build_stable=$BUILD_STABLE" >> $GITHUB_OUTPUT
          echo "build_experimental=$BUILD_EXPERIMENTAL" >> $GITHUB_OUTPUT
          
          if  [[ "$BUILD_STABLE" =~ ^[0-9]+$ ]]; then
            BUILD_NUMBER=$BUILD_STABLE
            BUILD_TYPE=stable
          else
            BUILD_NUMBER=$BUILD_EXPERIMENTAL
            BUILD_TYPE=experimental
          fi
          
          echo build_number="${BUILD_NUMBER}" >> $GITHUB_OUTPUT
          echo build_type="${BUILD_TYPE}" >> $GITHUB_OUTPUT

          if [[ $BUILD_TYPE == "stable" && "${{ needs.get_all_versions.outputs.latest }}" == "${{ matrix.versions }}" ]]; then
            echo is_latest="yes" >> $GITHUB_OUTPUT
          else
            echo is_latest="no" >> $GITHUB_OUTPUT
          fi
          
          if [[ $BUILD_TYPE == "experimental" && "${{ needs.get_all_versions.outputs.latest }}" -lt "${{ matrix.versions }}" ]]; then
            echo is_experimental="yes" >> $GITHUB_OUTPUT
          else
            echo is_experimental="no" >> $GITHUB_OUTPUT
          fi

      - name: get self build
        id: self_build
        run: |
          # DOCKER_IMAGE="ghcr.io/${{ github.repository_owner }}/docker-minecraft-papermc-server:${{ matrix.versions }}"
          DOCKER_IMAGE="docker.io/marctv/minecraft-papermc-server:${{ matrix.versions }}"
          docker pull $DOCKER_IMAGE || true
          echo self_build=$(docker inspect $DOCKER_IMAGE --format '{{ index .Config.Labels "org.mojang.minecraft.papermc.build"}}' || true) >> $GITHUB_OUTPUT

      - name: show output
        if: always()
        run: |
          echo "latest: ${{ needs.get_all_versions.outputs.latest }}"
          echo "version: ${{ matrix.versions }}"
          echo "build_stable: ${{ steps.latest_build.outputs.build_stable }}"
          echo "build_experimental: ${{ steps.latest_build.outputs.build_experimental }}"
          echo "build_number: ${{ steps.latest_build.outputs.build_number }}"
          echo "build_type: ${{ steps.latest_build.outputs.build_type }}"
          echo "is_latest: ${{ steps.latest_build.outputs.is_latest }}"
          echo "is_experimental: ${{ steps.latest_build.outputs.is_experimental }}"
          echo "self_build: ${{ steps.self_build.outputs.self_build }}"

      - name: Repository Dispatch
        uses: peter-evans/repository-dispatch@v3
        if: github.event_name == 'workflow_dispatch' || steps.latest_build.outputs.build_number != steps.self_build.outputs.self_build
        with:
          event-type: build_version
          client-payload: '{"download_version": "${{ matrix.versions }}", "is_latest": "${{ steps.latest_build.outputs.is_latest }}", "is_experimental": "${{ steps.latest_build.outputs.is_experimental }}"}'