flagger/.github/workflows/release.yml

name: release
on:
  push:
    tags:
      - 'v*'
  workflow_dispatch:
    inputs:
      tag:
        description: 'image tag prefix'
        default: 'rc'
        required: true

permissions:
  contents: read

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

jobs:
  release-flagger:
    runs-on: ubuntu-latest
    permissions:
      contents: write # needed to write releases
      id-token: write # needed for keyless signing
      packages: write # needed for ghcr access
    steps:
      - uses: actions/checkout@v3
      - uses: fluxcd/flux2/action@main
      - uses: sigstore/cosign-installer@v3.1.1
      - name: Prepare
        id: prep
        run: |
          if [[ ${GITHUB_EVENT_NAME} = "workflow_dispatch" ]]; then
            VERSION="${{ github.event.inputs.tag }}-${GITHUB_SHA::8}"
          else
            VERSION=$(grep 'VERSION' pkg/version/version.go | awk '{ print $4 }' | tr -d '"')
          fi
          CHANGELOG="https://github.com/fluxcd/flagger/blob/main/CHANGELOG.md#$(echo $VERSION | tr -d '.')"
          echo "[CHANGELOG](${CHANGELOG})" > notes.md
          echo "BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> $GITHUB_OUTPUT
          echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
      - name: Setup QEMU
        uses: docker/setup-qemu-action@v2
      - name: Setup Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v2
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: fluxcdbot
          password: ${{ secrets.GHCR_TOKEN }}
      - name: Generate image meta
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: |
            ${{ env.IMAGE }}
          tags: |
            type=raw,value=${{ steps.prep.outputs.VERSION }}
      - name: Publish image
        id: build-push
        uses: docker/build-push-action@v4
        with:
          sbom: true
          provenance: true
          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
        env:
          COSIGN_EXPERIMENTAL: 1
        run: |
          cosign sign --yes ${{ env.IMAGE }}@${{ steps.build-push.outputs.digest }}
      - name: Publish Helm charts
        if: startsWith(github.ref, 'refs/tags/v')
        uses: stefanprodan/helm-gh-pages@v1.7.0
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          charts_url: https://flagger.app
          linting: off
      - uses: fluxcd/pkg/actions/helm@main
        with:
          version: 3.10.1
      - name: Publish signed Helm chart to GHCR
        if: startsWith(github.ref, 'refs/tags/v')
        env:
          COSIGN_EXPERIMENTAL: 1
        run: |
          helm package charts/flagger
          digest = $(helm push flagger-${{ steps.prep.outputs.VERSION }}.tgz oci://ghcr.io/fluxcd/charts | awk '/Digest:/ {print $2}' | tr -d '\n' | xargs)
          cosign sign --yes ghcr.io/fluxcd/charts/flagger@${{ digest }}
          rm flagger-${{ steps.prep.outputs.VERSION }}.tgz
      - name: Publish signed manifests to GHCR
        if: startsWith(github.ref, 'refs/tags/v')
        env:
          COSIGN_EXPERIMENTAL: 1
        run: |
          digest_url = $(flux push artifact \
            oci://ghcr.io/fluxcd/flagger-manifests:${{ steps.prep.outputs.VERSION }} \
            --path="./kustomize" \
            --source="$(git config --get remote.origin.url)" \
            --revision="${{ steps.prep.outputs.VERSION }}/$(git rev-parse HEAD)"
            --output json | \
            jq -r '. | .repository + "@" + .digest')
          cosign sign --yes ${{ digest_url }}
      - uses: anchore/sbom-action/download-syft@v0
      - name: Create release and SBOM
        uses: goreleaser/goreleaser-action@v4
        if: startsWith(github.ref, 'refs/tags/v')
        with:
          version: latest
          args: release --release-notes=notes.md --rm-dist --skip-validate
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}