reqcore/.github/workflows/docker-publish.yml at main · reqcore-inc/reqcore · GitHub

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name: Publish Docker Image

on:
  push:
    branches: [main]
    tags: ["v*"]

permissions:
  contents: read
  packages: write
  # id-token: needed by cosign for keyless OIDC signing.
  # attestations: needed to publish build attestations to GHCR.
  id-token: write
  attestations: write

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

jobs:
  docker:
    name: Build & Push Docker Image
    runs-on: ubuntu-latest
    timeout-minutes: 30

    steps:
      # ── 1. Checkout (needed for path context so .dockerignore is respected) ──
      - name: Checkout
        uses: actions/checkout@v6

      # ── 2. Multi-platform support ───────────────────────────────────────────
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      # ── 3. Registry authentication ─────────────────────────────────────────
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Log in to Docker Hub
        if: vars.DOCKERHUB_USERNAME != ''
        uses: docker/login-action@v4
        with:
          username: ${{ vars.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      # ── 4. Tag & label generation ──────────────────────────────────────────
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: |
            ghcr.io/${{ github.repository }}
            name=reqcore/reqcore,enable=${{ vars.DOCKERHUB_USERNAME != '' }}
          tags: |
            type=edge,branch=main
            type=raw,value=latest,enable={{is_default_branch}}
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha,prefix=sha-

      # ── 5. Build & push ────────────────────────────────────────────────────
      - name: Build and push
        id: build
        uses: docker/build-push-action@v7
        with:
          context: .
          push: true
          platforms: linux/amd64,linux/arm64
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          annotations: ${{ steps.meta.outputs.annotations }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          provenance: mode=max
          sbom: true
        env:
          DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index

      # ── 6. Keyless cosign signature (Sigstore OIDC) ────────────────────────
      # Self-hosters can verify the image they pulled was actually built by
      # this workflow with:
      #   cosign verify ghcr.io/reqcore-inc/reqcore@<digest> \
      #     --certificate-identity-regexp 'https://github.com/reqcore-inc/reqcore/.github/workflows/docker-publish.yml@.*' \
      #     --certificate-oidc-issuer 'https://token.actions.githubusercontent.com'
      - name: Install cosign
        uses: sigstore/cosign-installer@v3

      - name: Sign published images by digest
        env:
          DIGEST: ${{ steps.build.outputs.digest }}
          TAGS: ${{ steps.meta.outputs.tags }}
        run: |
          set -euo pipefail
          # cosign signs by immutable digest; the tags only resolve the digest.
          # We sign each unique image reference so verification works against
          # any tag the user pulled (latest, semver, edge, sha-…).
          # `${tag%:*}` (single %) strips only the trailing :tag so registries
          # with ports (e.g. registry.local:5000/repo:tag) survive intact.
          # Pipe through `sort -u` so the same image+digest is signed once
          # even when the tag list contains many aliases.
          printf '%s\n' $TAGS \
            | awk 'NF' \
            | sed -E 's#:[^:/]+$##' \
            | sort -u \
            | while IFS= read -r image; do
                echo "Signing ${image}@${DIGEST}"
                cosign sign --yes "${image}@${DIGEST}"
              done