.github/workflows/ci-image.yml

name: Build CI Base Image (GnuTLS+leancrypto / MbedTLS)

# Builds and publishes the debian:forky-based CI base image used by the
# build-linux-combos matrix in build-and-test.yml. See .github/docker/README.md.

on:
  workflow_dispatch:
  push:
    branches: [ "master" ]
    paths:
      - ".github/docker/Dockerfile"
      - ".github/workflows/ci-image.yml"

# Least privilege: read the repo, write packages (GHCR) via GITHUB_TOKEN.
permissions:
  contents: read
  packages: write

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}/gnutls-leancrypto-mbedtls

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Derive lowercase image ref
        id: meta
        run: echo "image=${REGISTRY,,}/${IMAGE_NAME,,}" >> "$GITHUB_OUTPUT"

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          file: .github/docker/Dockerfile
          platforms: linux/amd64
          push: true
          tags: |
            ${{ steps.meta.outputs.image }}:latest
            ${{ steps.meta.outputs.image }}:forky
            ${{ steps.meta.outputs.image }}:${{ github.sha }}
          labels: |
            org.opencontainers.image.source=https://github.com/${{ github.repository }}
            org.opencontainers.image.revision=${{ github.sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          provenance: false