name: build
on: [push, pull_request]
jobs:
  build:
    strategy:
      matrix:
        go-version: [1.14.x, 1.15.x]
        os: [ubuntu-latest, macos-latest, windows-latest]

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

    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-go@v2
        with:
          go-version: ${{ matrix.go-version }}
        id: go

      - name: Build
        run: go build -v

      - name: Test
        run: go test -v ./...

  push:
    runs-on: ubuntu-latest
    needs: [build]
    steps:
      - uses: actions/checkout@v2

      - name: Get Image Metadata
        id: image_metadata
        run: |
          DOCKER_IMAGE=ghcr.io/${{ github.event.repository.full_name }}
          # Always tag latest
          TAGS=$DOCKER_IMAGE:latest
          # Add version tag
          if [[ $GITHUB_REF == refs/tags/* ]]; then
            VERSION=${GITHUB_REF#refs/tags/}
            TAGS=$TAGS,$DOCKER_IMAGE:$VERSION
            # Add major and minor tag i.e for version 1.2.3, tag 1.2 and 1
            if [[ $VERSION =~ ^[0-9]\.[0-9]\.[0-9]$ ]]; then
              MINOR=${VERSION%.*}
              MAJOR=${MINOR%.*}
              TAGS="$TAGS,${DOCKER_IMAGE}:${MINOR},${DOCKER_IMAGE}:${MAJOR}"
            fi
          fi
          echo "::set-output name=date::$(date +'%Y-%m-%dT%H:%M:%S')"
          echo "::set-output name=tags::${TAGS}"

      - name: Login to GHCR
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ secrets.GHCR_USERNAME }}
          password: ${{ secrets.GHCR_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Build/Push To GHCR
        uses: docker/build-push-action@v2
        with:
          context: .
          file: Dockerfile
          push: true
          tags: ${{ steps.image_metadata.outputs.tags }}
          labels: |
            org.opencontainers.image.title=${{ github.event.repository.name }}
            org.opencontainers.image.description=${{ github.event.repository.description }}
            org.opencontainers.image.url=${{ github.event.repository.html_url }}
            org.opencontainers.image.source=${{ github.event.repository.html_url }}
            org.opencontainers.image.version=latest
            org.opencontainers.image.created=${{ steps.image_metadata.outputs.date }}
            org.opencontainers.image.revision=${{ github.sha }}
            org.opencontainers.image.licenses=${{ github.event.repository.license.spdx_id }}