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ci: honor a repository-variable override for the push gateway image #4722

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ci: honor a repository-variable override for the push gateway image #4722

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23 changes: 14 additions & 9 deletions .github/workflows/docker.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,9 @@ env:
# variable to override (e.g., for forks that want to push to their own
# namespace without forking this file).
IMAGE_NAME: ${{ vars.GHCR_IMAGE != '' && vars.GHCR_IMAGE || 'ghcr.io/block/buzz' }}
# Same override, same rationale, for the push gateway image. Set
# GHCR_PUSH_GATEWAY_IMAGE as a repo variable to override.
PUSH_GATEWAY_IMAGE: ${{ vars.GHCR_PUSH_GATEWAY_IMAGE != '' && vars.GHCR_PUSH_GATEWAY_IMAGE || 'ghcr.io/block/buzz-push-gateway' }}

jobs:
build:
Expand Down Expand Up @@ -387,7 +390,7 @@ jobs:
id: meta
uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
with:
images: ghcr.io/block/buzz-push-gateway
images: ${{ env.PUSH_GATEWAY_IMAGE }}
labels: |
org.opencontainers.image.title=Buzz Push Gateway
org.opencontainers.image.description=Capability-gated APNs last hop for Buzz
Expand All @@ -400,9 +403,9 @@ jobs:
file: ./Dockerfile.push-gateway
platforms: ${{ matrix.platform }}
labels: ${{ steps.meta.outputs.labels }}
outputs: type=image,name=ghcr.io/block/buzz-push-gateway,push-by-digest=true,name-canonical=true,push=${{ github.event_name != 'pull_request' }}
cache-from: type=registry,ref=ghcr.io/block/buzz-push-gateway-buildcache:${{ matrix.arch }}
cache-to: ${{ (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) && format('type=registry,ref=ghcr.io/block/buzz-push-gateway-buildcache:{0},mode=max,compression=zstd', matrix.arch) || '' }}
outputs: type=image,name=${{ env.PUSH_GATEWAY_IMAGE }},push-by-digest=true,name-canonical=true,push=${{ github.event_name != 'pull_request' }}
cache-from: type=registry,ref=${{ env.PUSH_GATEWAY_IMAGE }}-buildcache:${{ matrix.arch }}
cache-to: ${{ (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) && format('type=registry,ref={0}-buildcache:{1},mode=max,compression=zstd', env.PUSH_GATEWAY_IMAGE, matrix.arch) || '' }}
- name: Export digest
if: github.event_name != 'pull_request'
env:
Expand Down Expand Up @@ -447,7 +450,7 @@ jobs:
id: meta
uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
with:
images: ghcr.io/block/buzz-push-gateway
images: ${{ env.PUSH_GATEWAY_IMAGE }}
tags: |
type=ref,event=branch,enable=${{ github.event_name != 'workflow_dispatch' || inputs.version == '' }}
type=sha,prefix=sha-,format=short,enable=${{ github.event_name != 'workflow_dispatch' || inputs.version == '' }}
Expand All @@ -458,28 +461,30 @@ jobs:
working-directory: /tmp/gateway-digests
env:
META_TAGS: ${{ steps.meta.outputs.tags }}
PUSH_GATEWAY_IMAGE: ${{ env.PUSH_GATEWAY_IMAGE }}
run: |
set -euo pipefail
tags=(); while IFS= read -r tag; do [ -n "$tag" ] && tags+=("-t" "$tag"); done <<< "$META_TAGS"
digests=(); for digest in *; do digests+=("ghcr.io/block/buzz-push-gateway@sha256:${digest}"); done
digests=(); for digest in *; do digests+=("${PUSH_GATEWAY_IMAGE}@sha256:${digest}"); done
docker buildx imagetools create "${tags[@]}" "${digests[@]}"
first_tag=$(echo "$META_TAGS" | head -n1)
digest=$(docker buildx imagetools inspect "$first_tag" --format '{{json .Manifest}}' | jq -r '.digest')
echo "digest=${digest}" >> "$GITHUB_OUTPUT"
- name: Attest gateway image provenance
uses: actions/attest-build-provenance@0f67c3f4856b2e3261c31976d6725780e5e4c373 # v4.1.1
with:
subject-name: ghcr.io/block/buzz-push-gateway
subject-name: ${{ env.PUSH_GATEWAY_IMAGE }}
subject-digest: ${{ steps.manifest.outputs.digest }}
push-to-registry: true
- name: Gateway publication summary
env:
GATEWAY_DIGEST: ${{ steps.manifest.outputs.digest }}
GATEWAY_TAGS: ${{ steps.meta.outputs.tags }}
PUSH_GATEWAY_IMAGE: ${{ env.PUSH_GATEWAY_IMAGE }}
run: |
set -euo pipefail
{
echo "### Published \`ghcr.io/block/buzz-push-gateway\`"
echo "### Published \`${PUSH_GATEWAY_IMAGE}\`"
echo
printf "**Digest:** \`%s\`\n" "$GATEWAY_DIGEST"
echo
Expand All @@ -490,6 +495,6 @@ jobs:
echo
echo 'Verify provenance before deployment:'
echo "\`\`\`"
printf 'gh attestation verify oci://ghcr.io/block/buzz-push-gateway@%s --owner block\n' "$GATEWAY_DIGEST"
printf 'gh attestation verify oci://%s@%s --owner block\n' "$PUSH_GATEWAY_IMAGE" "$GATEWAY_DIGEST"
echo "\`\`\`"
} >> "$GITHUB_STEP_SUMMARY"