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:
      attestations: write
      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@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
        with:
          persist-credentials: false
      - uses: sigstore/cosign-installer@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 # v3.5.0
        if: github.event_name != 'merge_group'
      - uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v3.0.0
      - uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3.3.0
      - uses: docker/login-action@e92390c5fb421da1463c202d546fed0ec5c39f20 # v3.1.0
        if: github.event_name != 'merge_group'
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - 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
      - uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
        id: build-and-push
        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
          cache-to: type=gha,mode=max
      - 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@7ccf588e3cf3cc2611714c2eeae48550fbc17552 # v0.15.11
        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@0c155c5e8556a497adf53f2c18edabf945ed8e70 # v4.3.2
        if: github.event_name == 'pull_request'
        with:
          comment-summary-in-pr: on-failure
          fail-on-severity: critical
      - uses: actions/attest-build-provenance@951c0c5f8e375ad4efad33405ab77f7ded2358e4 # v1.1.1
        with:
          subject-name: ${{ env.REGISTRY }}/${{ github.repository }}-${{ matrix.flavor }}
          subject-digest: ${{ steps.build-and-push.outputs.digest }}
      - 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}"