build.yml

name: Build ExpressLRS Backpack
on: [push, pull_request]
jobs:
  targets:
    runs-on: ubuntu-latest
    outputs:
      targets: ${{ steps.set-targets.outputs.targets }}
    steps:
    - name: Checkout
      uses: actions/checkout@v3
    - id: set-targets
      run: echo "targets=[$(grep -r "\[env:" targets | sed 's/.*://' | sed s/.$// | egrep "UART" | tr '\n' ',' | sed 's/,$/"\n/' | sed 's/,/","/'g | sed 's/^/"/')]" >> $GITHUB_OUTPUT

  build:
    needs: targets
    strategy:
      fail-fast: false
      matrix:
        target: ${{fromJSON(needs.targets.outputs.targets)}}
    runs-on: ubuntu-latest
    steps:

    - name: Inject slug/short variables
      uses: rlespinasse/github-slug-action@v4

    - name: Checkout
      uses: actions/checkout@v3

    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: '3.10'

    - name: Cache pip
      uses: actions/cache@v3
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-pip-${{ matrix.target }}

    - name: Install PlatformIO
      run: |
        python -m pip install --upgrade pip
        pip install platformio
        pip install wheel

    - name: Cache PlatformIO
      uses: actions/cache@v3
      with:
        path: ~/.platformio
        key: ${{ runner.os }}-platformio

    - name: Run PlatformIO
      run: |
        platformio platform update
        platformio platform install native
        mkdir -p ~/artifacts/firmware
        pio run -e ${{ matrix.target }}
        mv .pio/build/${{ matrix.target }} ~/artifacts/firmware/`echo ${{ matrix.target }} | sed s/_via_UART//`
        cp -r hardware ~/artifacts/firmware

    - name: Store Artifacts
      uses: actions/upload-artifact@v3
      with:
        name: firmware
        path: |
          ~/artifacts/**/*.bin
          ~/artifacts/**/*.json
      continue-on-error: true

  firmware:
    needs: [build]
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@v4
        with:
          python-version: '3.10'

      - name: Get firmware artifacts
        uses: actions/download-artifact@v3
        with:
          name: firmware
          path: dist

      - name: Build flasher "binary" with shiv
        run: |
          cd python
          pip install shiv
          shiv -c flash -o ../dist/firmware/flasher.pyz pyserial .

      - name: Update firmware artifact
        uses: actions/upload-artifact@v3
        with:
          name: firmware
          path: dist/**/*

      - name: Create firmware zip bundle
        run: |
          cd dist
          zip -r -9 ../firmware.zip .

      - name: Upload firmware bundle to ExpressLRS artifactory
        env:
          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
          AWS_ENDPOINT_URL: ${{ secrets.AWS_ENDPOINT_URL }}
          AWS_REGION: "auto"
        run: |
          if [[ -z $AWS_ACCESS_KEY_ID || -z $AWS_SECRET_ACCESS_KEY || -z $AWS_ENDPOINT_URL ]]; then
            echo "Artifactory credentials are not defined. Most likely action is running from pull request. Not a bug."
            exit 0
          fi

          echo "Uploading firmware to artifactory"
          aws s3 cp --endpoint-url $AWS_ENDPOINT_URL firmware.zip s3://expresslrs/Backpack/$GITHUB_SHA/firmware.zip

          echo "Generating artifact index"
          aws s3 ls --endpoint-url $AWS_ENDPOINT_URL s3://expresslrs/Backpack/ | awk '{print $2}' | sed s/\\/// > /tmp/hashes
          echo '{' > index.json
          echo '"branches": {' >> index.json
          git branch --list --remotes --format '"%(refname:short)": "%(objectname)",' | grep origin/ | sed s/origin.// | grep -f /tmp/hashes | head -c-2 >> index.json
          echo '' >> index.json
          echo '},' >> index.json
          echo '"tags": {' >> index.json
          git tag --list --format '"%(refname:short)": "%(objectname)",' | grep -f /tmp/hashes | head -c-2 >> index.json
          echo '' >> index.json
          echo '}' >> index.json
          echo '}' >> index.json

          echo "Uploading artifact index"
          aws s3 cp --endpoint-url $AWS_ENDPOINT_URL index.json s3://expresslrs/Backpack/index.json