docker-publish.yml

# SPDX-License-Identifier: MPL-2.0
# // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
# SPDX-License-Identifier: MPL-2.0
name: Docker Build and Publish
on:
  push:
    branches: [main]
    tags: ['v*']
  pull_request:
    branches: [main]
permissions:
  actions: read
  contents: read
jobs:
  build:
    runs-on: ubuntu-latest
    timeout-minutes: 15
    permissions:
      contents: read
      packages: write
      id-token: write
      attestations: write
    steps:
      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
      - name: Build and push
        id: push
        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
      - name: Attest container provenance
        if: github.event_name != 'pull_request'
        uses: actions/attest-build-provenance@e8998f949152b193b063cb0ec769d69d929409be # v2
        with:
          subject-name: ghcr.io/${{ github.repository }}
          subject-digest: ${{ steps.push.outputs.digest }}
          push-to-registry: true