build.yml

name: Build
on:
  - push
  - pull_request

env:
  GOVER: ^1.18
  NAME: tagesschau-eilbot

jobs:
  build:
    name: build
    runs-on: ubuntu-latest
    strategy:
      matrix:
        GOOS: [windows, linux, darwin]
        GOARCH: [amd64, 386, arm, arm64]
        exclude:
          - GOOS: windows
            GOARCH: arm
          - GOOS: darwin
            GOARCH: 386
          - GOOS: darwin
            GOARCH: arm

    steps:
      - name: Checkout repo
        uses: actions/checkout@v4

      - name: Cache
        uses: actions/cache@v3
        with:
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
          restore-keys: |
            ${{ runner.os }}-go-

      - name: Setup Go
        uses: actions/setup-go@v4
        with:
          go-version: ${{ env.GOVER }}

      - name: Build
        env:
          GOOS: ${{ matrix.GOOS }}
          GOARCH: ${{ matrix.GOARCH }}
        run: go build -ldflags="-s -w" -o dist/$NAME-$GOOS-$GOARCH

      - name: Rename binaries (Windows)
        if: matrix.GOOS == 'windows'
        run: for x in dist/$NAME-windows-*; do mv $x $x.exe; done

      - name: Upload binary
        uses: actions/upload-artifact@v3
        with:
          name: ${{env.NAME}}-${{ matrix.GOOS }}-${{ matrix.GOARCH }}-${{github.sha}}
          path: dist/*
          retention-days: 90

  docker:
    name: docker
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read

    steps:
      - uses: actions/checkout@v4

      - name: Build image
        run: docker build . --file Dockerfile --tag $NAME --label "runnumber=${GITHUB_RUN_ID}"

      - name: Log in to registry
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u $ --password-stdin

      - name: Push image
        run: |
          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$NAME

          # This changes all uppercase characters to lowercase.
          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
          # This strips the git ref prefix from the version.
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          # This strips the "v" prefix from the tag name.
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
          # This uses the Docker `latest` tag convention.
          [ "$VERSION" == "master" ] && VERSION=latest
          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION
          docker tag $NAME $IMAGE_ID:$VERSION
          docker push $IMAGE_ID:$VERSION