# Gitea twin of .github/workflows/docker.yml. Gitea runs only .gitea/workflows/ once this
# folder exists, and GitHub never reads it.
#
# Publishes to IPCR on watch.nsl.sh instead of ghcr.io:
#   push  ipcr-push-85-17-246-67.ip.nsl.sh/metadec.eth/<repo>:<tag>   docker login as metadec.eth with the
#         IPCR_PUSH_TOKEN secret (the metadec.eth namespace token from the IPCR dashboard)
#   pull  ipcr-watch.nsl.sh/ipns/metadec.eth/metadec.eth/<repo>:<tag>   anonymous
# The push goes to ipcr-push-85-17-246-67.ip.nsl.sh, the box's own address, not ipcr-push-watch.nsl.sh: Cloudflare fronts
# *.watch.nsl.sh and refuses any request over 100 MB (413), which a large image layer is.
# That host's certificate is signed by the box's private Mesh Router CA, given to buildkit from
# the IPCR_CA_PEM repo variable. docker login would make the job's Docker daemon check the
# certificate without that CA, so the login is written straight into ~/.docker/config.json.
# The runner's job image (node:22-bookworm) has no docker CLI, so the static one is
# installed first; buildx installs itself. No `type=gha` cache: the runner has none.

name: Build and Push Docker Image

on:
  push:
    branches: [main, master]
    tags: ['v*']
  pull_request:
    branches: [main, master]

env:
  REGISTRY: ipcr-push-85-17-246-67.ip.nsl.sh
  IMAGE_NAME: metadec.eth/${{ github.event.repository.name }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Install Docker CLI
        run: curl -fsSL https://download.docker.com/linux/static/stable/x86_64/docker-28.5.1.tgz | tar -xz -C /usr/local/bin --strip-components=1 docker/docker

      - name: Trust the Mesh Router CA
        run: printf '%s\n' "$IPCR_CA_PEM" > /tmp/ipcr-ca.pem
        env:
          IPCR_CA_PEM: ${{ vars.IPCR_CA_PEM }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          version: latest
          buildkitd-config-inline: |
            [registry."${{ env.REGISTRY }}"]
              ca = ["/tmp/ipcr-ca.pem"]

      - name: Log in to IPCR
        if: github.event_name != 'pull_request'
        env:
          IPCR_PUSH_TOKEN: ${{ secrets.IPCR_PUSH_TOKEN }}
        run: |
          mkdir -p ~/.docker
          printf '{"auths":{"%s":{"auth":"%s"}}}\n' "$REGISTRY" "$(printf 'metadec.eth:%s' "$IPCR_PUSH_TOKEN" | base64 -w0)" > ~/.docker/config.json

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            # A fix to release 1.2.3 is tagged v1.2.3.1: four numbers are not semver, so
            # the pattern above makes no tag for it; this one does (image tag 1.2.3.1).
            type=match,pattern=v(\d+\.\d+\.\d+\.\d+),group=1
            type=semver,pattern={{major}}.{{minor}}
            type=sha

      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}