build-push.yml

---
name: Build & Push

on:
  merge_group:
  pull_request:
  push:
    tags: ["v*.*.*"]
  workflow_dispatch:

concurrency:
  group: ${{ github.ref }}-${{ github.workflow }}
  cancel-in-progress: true

permissions:
  contents: read

env:
  REGISTRY: ghcr.io

jobs:
  build-push:
    runs-on: ubuntu-latest
    permissions:
      # dependency-submission needs contents write permission.
      contents: write
      packages: write
      pull-requests: write
      # This is used to complete the identity challenge
      # with sigstore/fulcio when running outside of PRs.
      id-token: write
    strategy:
      matrix:
        flavor: ["cpp", "rust"]
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
        with:
          persist-credentials: false
      - uses: sigstore/cosign-installer@4959ce089c160fddf62f7b42464195ba1a56d382 # v3.6.0
        if: github.event_name != 'merge_group'
      - uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
      - uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
        if: github.event_name != 'merge_group'
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
        if: matrix.flavor == 'cpp'
        id: buildkit-cache
        with:
          path: root-ccache
          key: buildkit-cache-${{ github.run_id }}
          restore-keys: |
            buildkit-cache
      - uses: reproducible-containers/buildkit-cache-dance@5b6db76d1da5c8b307d5d2e0706d266521b710de # v3.1.2
        if: matrix.flavor == 'cpp'
        with:
          cache-map: |
            {
              "root-ccache": "/root/.ccache"
            }
          skip-extraction: ${{ steps.buildkit-cache.outputs.cache-hit }}
      - uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
        id: metadata
        env:
          DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index
        with:
          images: ${{ env.REGISTRY }}/${{ github.repository }}-${{ matrix.flavor }}
          # Generate Docker tags based on the following events/attributes
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=ref,event=pr
            type=semver,pattern={{raw}}
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
      # Generate image LABEL for devcontainer.metadata
      # the sed expression is a workaround for quotes being eaten in arrays (e.g. ["x", "y", "z"] -> ["x",y,"z"])
      - run: echo "metadata=$(jq -cj '[.]' .devcontainer/${{ matrix.flavor }}/devcontainer-metadata-vscode.json | sed 's/,"/, "/g')" >> "$GITHUB_OUTPUT"
        id: devcontainer-metadata
      - run: echo "git-commit-epoch=$(git log -1 --pretty=%ct)" >> "$GITHUB_OUTPUT"
        id: devcontainer-epoch
      - uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
        id: build-and-push
        env:
          SOURCE_DATE_EPOCH: ${{ steps.devcontainer-epoch.outputs.git-commit-epoch }}
        with:
          file: .devcontainer/${{ matrix.flavor }}/Dockerfile
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'merge_group' }}
          tags: ${{ steps.metadata.outputs.tags }}
          labels: |
            ${{ steps.metadata.outputs.labels }}
            devcontainer.metadata=${{ steps.devcontainer-metadata.outputs.metadata }}
          annotations: ${{ steps.metadata.outputs.annotations }}
          sbom: true
          provenance: true
          cache-from: type=gha,scope=${{ github.repository }}-${{ matrix.flavor }}
          cache-to: type=gha,mode=max,scope=${{ github.repository }}-${{ matrix.flavor }}
      - uses: ./.github/actions/container-size-diff
        id: container-size-diff
        with:
          from-container: ${{ env.REGISTRY }}/${{ github.repository }}-${{ matrix.flavor }}:latest
          to-container: ${{ env.REGISTRY }}/${{ github.repository }}-${{ matrix.flavor }}@${{ steps.build-and-push.outputs.digest }}
      - uses: marocchino/sticky-pull-request-comment@331f8f5b4215f0445d3c07b4967662a32a2d3e31 # v2.9.0
        with:
          header: container-size-diff-${{ matrix.flavor }}
          message: |
            ${{ steps.container-size-diff.outputs.size-diff-markdown }}
      - uses: anchore/sbom-action@ab9d16d4b419c9d1a02df5213fa0ebe965ca5a57 # v0.17.1
        if: steps.build-and-push.outputs.digest != '' && github.event_name != 'merge_group'
        with:
          image: ${{ env.REGISTRY }}/${{ github.repository }}-${{ matrix.flavor }}@${{ steps.build-and-push.outputs.digest }}
          dependency-snapshot: true
      - uses: actions/dependency-review-action@5a2ce3f5b92ee19cbb1541a4984c76d921601d7c # v4.3.4
        if: github.event_name == 'pull_request'
        with:
          comment-summary-in-pr: on-failure
          fail-on-severity: critical
      - name: Sign the images with GitHub OIDC token
        if: github.event_name != 'merge_group'
        # This step uses the GitHub OIDC identity token to provision an ephemeral certificate
        # against the sigstore community Fulcio instance.
        env:
          DIGEST: ${{ steps.build-and-push.outputs.digest }}
        run: |
          cosign sign --yes --recursive "${{ env.REGISTRY }}/${{ github.repository }}-${{ matrix.flavor }}@${DIGEST}"