name: release
on:
  push:
    tags:
      - 'v*'

permissions:
  contents: write # needed to write releases
  id-token: write # needed for keyless signing
  packages: write # needed for ghcr access

env:
  IMAGE: "ghcr.io/fluxcd/${{ github.event.repository.name }}"

jobs:
  build-push:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: sigstore/cosign-installer@main
      - name: Prepare
        id: prep
        run: |
          VERSION=$(grep 'VERSION' pkg/version/version.go | awk '{ print $4 }' | tr -d '"')
          CHANGELOG="https://github.com/fluxcd/flagger/blob/main/CHANGELOG.md#$(echo $VERSION | tr -d '.')"
          echo "[CHANGELOG](${CHANGELOG})" > notes.md
          echo ::set-output name=BUILD_DATE::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
          echo ::set-output name=VERSION::${VERSION}
      - name: Setup QEMU
        uses: docker/setup-qemu-action@v1
      - name: Setup Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: fluxcdbot
          password: ${{ secrets.GHCR_TOKEN }}
      - name: Generate image meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: |
            ${{ env.IMAGE }}
          tags: |
            type=raw,value=${{ steps.prep.outputs.VERSION }}
      - name: Publish image
        uses: docker/build-push-action@v2
        with:
          push: true
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64,linux/arm/v7
          build-args: |
            REVISON=${{ github.sha }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
      - name: Sign image
        run: |
          echo -n "${{secrets.COSIGN_PASSWORD}}" | \
          cosign sign -key ./.cosign/cosign.key -a git_sha=$GITHUB_SHA \
          ${{ env.IMAGE }}:${{ steps.prep.outputs.VERSION }}
      - name: Check images
        run: |
          docker buildx imagetools inspect ${{ env.IMAGE }}:${{ steps.prep.outputs.VERSION }}
      - name: Verifiy image signature
        run: |
          cosign verify -key ./.cosign/cosign.pub \
          ${{ env.IMAGE }}:${{ steps.prep.outputs.VERSION }}
      - name: Publish Helm charts
        uses: stefanprodan/helm-gh-pages@v1.3.0
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          charts_url: https://flagger.app
          linting: off
      - uses: anchore/sbom-action/download-syft@v0
      - name: Create release and SBOM
        uses: goreleaser/goreleaser-action@v2
        with:
          version: latest
          args: release --release-notes=notes.md --rm-dist --skip-validate
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}