# Publish the container image, ported from .github/workflows/publish.yml when
# the project moved to the self-hosted Gitea (2026-09-22). Starts on a v* tag,
# whether a person pushed it or weekly-release.yml created it through the
# releases API.
#
# The image is multi-arch (linux/amd64, linux/arm64) as before, but built in
# one buildx run on host1 instead of one native runner per architecture: the
# Dockerfile's builder stage runs on the build platform and cross-compiles
# with an aarch64 linker, so only the small final stage (apt, setcap) goes
# through QEMU for arm64. No digest-joining job is needed.
#
# Two guards before anything is pushed:
#   * the tag must be v<brand_version!>. The version is a string in
#     crates/types/src/branding.rs, not Cargo.toml, and the image is tagged
#     with it, so a tag beside an unbumped macro would publish an image that
#     reports a different version from its tag.
#   * the tag must be on main, so an image never describes code that was never
#     reviewed onto the default branch.
#
# :latest moves with every published tag: tags are cut by the weekly release
# (or by hand for a real release); there are no prerelease tags here.
#
# The push logs in with PACKAGE_TOKEN (jcoffey-dev, write:package): the job's
# own token is refused by the container registry.
name: publish

on:
  push:
    tags: ['v*']

jobs:
  version:
    runs-on: light
    container:
      image: python:3.13-slim@sha256:8d9d0b8bcf6506481eae4907c18f5e3e7902e629f5f6d684f9e7c32e85e3ddf0 # 3.13-slim
    outputs:
      version: ${{ steps.v.outputs.version }}
    steps:
      # Full history: the ancestry check cannot be answered from a shallow
      # clone. The checkout also fetches every branch as origin/*.
      - uses: coffey-labs/actions/checkout@fab0c4d45e0162963965f1555df27b7bed5e20ec
        with:
          fetch-depth: 0
      - id: v
        shell: bash
        env:
          TAG: ${{ github.ref_name }}
        run: |
          set -euo pipefail
          # Scoped to the macro body: branding.rs holds other string literals,
          # and tagging an image from one of those would be worse than failing.
          V="$(awk '/macro_rules! brand_version /,/^}/' crates/types/src/branding.rs \
               | grep -om1 '"[0-9][^"]*"' | tr -d '"')"
          [ -n "$V" ] || { echo "could not read brand_version! from branding.rs" >&2; exit 1; }
          if [ "$TAG" != "v$V" ]; then
            echo "Tag $TAG names a commit whose brand_version! says $V." >&2
            echo "Refusing to publish an image that would report the wrong version." >&2
            exit 1
          fi
          git merge-base --is-ancestor "$(git rev-parse "${TAG}^{commit}")" origin/main \
            || { echo "$TAG is not on main" >&2; exit 1; }
          echo "version=$V" >> "$GITHUB_OUTPUT"
          echo "version $V"

  publish:
    needs: [version]
    runs-on: docker
    container:
      image: docker:28-cli@sha256:625d9431a9f54c5a2bc90f24f0e1c3d55b1349fd857dd85035f98c2c9acbdd4d # 28-cli
      volumes:
        - /var/run/docker.sock:/var/run/docker.sock
    env:
      DOCKER_BUILDKIT: "1"
      REGISTRY: ${{ vars.REGISTRY }}
      IMAGE: ${{ vars.REGISTRY }}/${{ github.repository }}
      VERSION: ${{ needs.version.outputs.version }}
      PACKAGE_TOKEN: ${{ secrets.PACKAGE_TOKEN }}
    steps:
      - uses: coffey-labs/actions/checkout@fab0c4d45e0162963965f1555df27b7bed5e20ec
      - run: |
          test -n "$REGISTRY" && test -n "$VERSION"
          test -n "$PACKAGE_TOKEN" || { echo "PACKAGE_TOKEN secret is not set on this repository" >&2; exit 1; }
          echo "$PACKAGE_TOKEN" | docker login -u jcoffey-dev --password-stdin "$REGISTRY"
          docker run --privileged --rm tonistiigi/binfmt --install arm64
          docker buildx create --use --name gitea-builder --driver docker-container || docker buildx use gitea-builder
      # Attestations off, as before: they add manifests of their own to the
      # index, and the index should hold the two images and nothing else.
      - run: |
          docker buildx build \
            --platform linux/amd64,linux/arm64 \
            --provenance=false --sbom=false \
            --tag "$IMAGE:$VERSION" \
            --tag "$IMAGE:latest" \
            --push .
          docker buildx imagetools inspect "$IMAGE:$VERSION"
      # Gitea keeps a container package on its owner; linking it shows it on
      # the repository's Packages tab. Idempotent.
      - run: |
          apk add --no-cache -q curl
          curl -fsS -o /dev/null -X POST -H "Authorization: token $PACKAGE_TOKEN" \
            "$CI_SERVER_INTERNAL/api/v1/packages/${GITHUB_REPOSITORY%%/*}/container/${GITHUB_REPOSITORY#*/}/-/link/${GITHUB_REPOSITORY#*/}" \
            || echo "package already linked (or link refused); not fatal"
      - if: always()
        run: docker logout "$REGISTRY" || true

  # The weekly release creates its Release (and so the tag) first; a tag
  # pushed by hand has none. Either way the tag ends up with exactly one
  # Release, created after the image exists so its pull instructions work.
  release:
    needs: [version, publish]
    runs-on: light
    container:
      image: python:3.13-slim@sha256:8d9d0b8bcf6506481eae4907c18f5e3e7902e629f5f6d684f9e7c32e85e3ddf0 # 3.13-slim
    steps:
      - shell: bash
        env:
          TAG: ${{ github.ref_name }}
          VERSION: ${{ needs.version.outputs.version }}
          TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
          REGISTRY: ${{ vars.REGISTRY }}
        run: |
          python3 - <<'PY'
          import json, os, urllib.request, urllib.error
          api = f"{os.environ['CI_SERVER_INTERNAL']}/api/v1/repos/{os.environ['REPO']}"
          h = {"Authorization": f"token {os.environ['TOKEN']}", "Content-Type": "application/json"}
          tag, version = os.environ["TAG"], os.environ["VERSION"]
          try:
              urllib.request.urlopen(urllib.request.Request(f"{api}/releases/tags/{tag}", headers=h))
              print(f"{tag} already has a release"); raise SystemExit
          except urllib.error.HTTPError as e:
              if e.code != 404: raise
          image = f"{os.environ['REGISTRY']}/{os.environ['REPO']}:{version}"
          body = (f"Container image: `{image}` (linux/amd64, linux/arm64); also `:latest`.\n\n"
                  "Binaries for a host install are attached: `inbuxa-linux-amd64.tar.gz` and "
                  "`inbuxa-linux-arm64.tar.gz`, with `SHA256SUMS`. Each is the binary out of this "
                  "release's image for that architecture, so it is the same build. The image "
                  "grants it `cap_net_bind_service`; a host install has to grant that itself "
                  "(`setcap`, or `AmbientCapabilities` in the unit) to bind port 25.")
          data = json.dumps({"tag_name": tag, "name": f"INBUXA {version}", "body": body}).encode()
          r = json.load(urllib.request.urlopen(urllib.request.Request(f"{api}/releases", data=data, headers=h)))
          print(f"created release {r['tag_name']}")
          PY

  # The binaries for a host install, taken out of the image that was just
  # pushed rather than compiled again.
  #
  # Building them separately would mean a second Rust build per architecture
  # -- the slowest thing this pipeline does -- and would leave two artifacts
  # that are supposed to be the same build but only probably are. Extracting
  # them makes that identity a fact: the binary in the tarball is the file
  # the image runs.
  #
  # `docker create` does not start anything, so pulling an arm64 image on an
  # amd64 runner and copying a file out of it needs no emulation.
  binaries:
    needs: [version, publish, release]
    runs-on: docker
    container:
      image: docker:28-cli@sha256:625d9431a9f54c5a2bc90f24f0e1c3d55b1349fd857dd85035f98c2c9acbdd4d # 28-cli
      volumes:
        - /var/run/docker.sock:/var/run/docker.sock
    env:
      REGISTRY: ${{ vars.REGISTRY }}
      IMAGE: ${{ vars.REGISTRY }}/${{ github.repository }}
      VERSION: ${{ needs.version.outputs.version }}
      TAG: ${{ github.ref_name }}
      REPO: ${{ github.repository }}
      PACKAGE_TOKEN: ${{ secrets.PACKAGE_TOKEN }}
      TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - name: take the binaries out of the image
        run: |
          set -euo pipefail
          echo "$PACKAGE_TOKEN" | docker login -u jcoffey-dev --password-stdin "$REGISTRY"
          mkdir -p /out && cd /out
          for arch in amd64 arm64; do
            docker pull -q --platform "linux/$arch" "$IMAGE:$VERSION"
            id="$(docker create --platform "linux/$arch" "$IMAGE:$VERSION")"
            docker cp "$id:/usr/local/bin/inbuxa" "inbuxa"
            docker rm -f "$id" >/dev/null
            chmod 0755 inbuxa
            tar -czf "inbuxa-linux-$arch.tar.gz" inbuxa
            rm inbuxa
          done
          sha256sum inbuxa-linux-*.tar.gz > SHA256SUMS
          cat SHA256SUMS
      - name: attach them to the release
        run: |
          set -euo pipefail
          apk add --no-cache -q python3
          python3 - <<'PY'
          import json, os, urllib.request, urllib.error, uuid, pathlib
          api = f"{os.environ['CI_SERVER_INTERNAL']}/api/v1/repos/{os.environ['REPO']}"
          tok = {"Authorization": f"token {os.environ['TOKEN']}"}
          tag = os.environ["TAG"]

          def get(path):
              return json.load(urllib.request.urlopen(urllib.request.Request(api + path, headers=tok)))

          rel = get(f"/releases/tags/{tag}")
          assets = {a["name"]: a["id"] for a in get(f"/releases/{rel['id']}/assets")}

          for path in ["/out/inbuxa-linux-amd64.tar.gz", "/out/inbuxa-linux-arm64.tar.gz", "/out/SHA256SUMS"]:
              name = os.path.basename(path)
              # A re-run of a tag replaces its assets rather than leaving two
              # files with the same name and different contents.
              if name in assets:
                  urllib.request.urlopen(urllib.request.Request(
                      f"{api}/releases/{rel['id']}/assets/{assets[name]}", headers=tok, method="DELETE"))
              boundary = uuid.uuid4().hex
              body = b"".join([
                  f"--{boundary}\r\nContent-Disposition: form-data; name=\"attachment\"; filename=\"{name}\"\r\n".encode(),
                  b"Content-Type: application/octet-stream\r\n\r\n",
                  pathlib.Path(path).read_bytes(),
                  f"\r\n--{boundary}--\r\n".encode(),
              ])
              req = urllib.request.Request(
                  f"{api}/releases/{rel['id']}/assets?name={name}", data=body, method="POST",
                  headers={**tok, "Content-Type": f"multipart/form-data; boundary={boundary}"})
              urllib.request.urlopen(req)
              print("attached", name)
          PY
      - if: always()
        run: docker logout "$REGISTRY" || true