# Build + push the dockerized pieces.
#
# Two very different image families now:
#
#   BUILDER images (punktfunk-rust-ci{,-noble,-arm64cross}, punktfunk-fedora{,44}-rpm)
#     live on the LAN registry (home-ci-core, 192.168.1.58:5010 — unom/infra
#     runners/ci-core/) and are CONTENT-KEYED: the tag is a hash of what they are built
#     from (the ci/ tree, + rust-toolchain.toml for the cross image), and a build only
#     happens when that key has no manifest yet. A push that doesn't touch ci/ costs one
#     curl per image (~seconds), pushes nothing over the WAN, and mints no per-SHA tag
#     debris on the runners — the failure mode that filled the fleet's disks. `:latest`
#     is re-pushed alongside every new key and is what the consuming workflows pin.
#
#   APP images (punktfunk-web, punktfunk-docs) are deployables: they keep going to the
#     Gitea registry (git.unom.io) with :latest + :sha-<8> (+ :vX.Y.Z on tags), because
#     unom-1 deploys pull from there and releases pin them.
#
# Host and clients are intentionally NOT containerized (see CLAUDE.md "What's left").
#
# REGISTRY_TOKEN: repo Actions secret, a PAT with write:package scope (app images only —
# the LAN registry is unauthenticated inside the LAN).
#
# Bootstrap note: consuming workflows pull <LAN>/punktfunk-rust-ci:latest, so the LAN
# registry must hold a seeded :latest once (done 2026-07-29 from the last Gitea-registry
# images); after that, this workflow keeps :latest current whenever ci/ changes.
name: docker
# One pending run per workflow+ref: a newer push supersedes the queued/running one and cancels
# it (a canary only needs the latest commit; each release tag is its own ref so tag runs never
# cancel each other). Keeps a busy push cadence from piling ~10 queued runs per commit onto the
# runner fleet. Gitea honors this for push triggers (PR triggers: see gitea#35933).
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true


on:
  push:
    branches: [main]
    tags: ['v*']
  workflow_dispatch:

env:
  REGISTRY: git.unom.io
  OWNER: unom
  CI_REGISTRY: 192.168.1.58:5010

jobs:
  builders:
    runs-on: ubuntu-24.04
    timeout-minutes: 60
    strategy:
      matrix:
        include:
          - image: punktfunk-rust-ci
            dockerfile: ci/rust-ci.Dockerfile
          # Ubuntu 24.04 LTS host builder: same purpose as rust-ci but lowers the host .deb's glibc
          # floor to 2.39 and bundles a from-source FFmpeg 8, so the package installs on 24.04 LTS
          # (rust-ci's 26.04 build is uninstallable there). Consumed by deb.yml's build-publish-host job.
          - image: punktfunk-rust-ci-noble
            dockerfile: ci/rust-ci-noble.Dockerfile
          - image: punktfunk-fedora-rpm
            dockerfile: ci/fedora-rpm.Dockerfile
          # Fedora 44 builder (Fedora KDE spin): same Dockerfile, newer base → libavcodec.so.62.
          - image: punktfunk-fedora44-rpm
            dockerfile: ci/fedora-rpm.Dockerfile
            buildargs: --build-arg FEDORA_VERSION=44
            keysuffix: -f44
          # Android builder (JDK + SDK/NDK + cargo-ndk + sccache) — android.yml and
          # android-screenshots.yml run in it; ~3 GB of per-run Google downloads became
          # image layers.
          - image: punktfunk-android-ci
            dockerfile: ci/android-ci.Dockerfile
          # Arch builder (base-devel + both makepkg legs' deps + bun + sccache) —
          # arch.yml runs in it; ~1 GB of per-run pacman traffic became image layers.
          - image: punktfunk-arch-ci
            dockerfile: ci/arch-ci.Dockerfile
    steps:
      - uses: actions/checkout@v4

      # The key is the git TREE HASH of ci/ — every byte any of these Dockerfiles can see
      # (they all use ci/ as build context). One key for the whole family on purpose: a
      # change to any of them re-keys all four, and a spurious rebuild of a sibling is
      # cheap, rare, and infinitely better than a stale one.
      - name: Content key
        run: |
          git config --global --add safe.directory "$PWD"
          echo "KEY=ck-$(git rev-parse HEAD:ci | cut -c1-12)${{ matrix.keysuffix }}" >> "$GITHUB_ENV"

      - name: Check whether this key already exists
        id: exists
        run: |
          ACCEPT='Accept: application/vnd.docker.distribution.manifest.v2+json, application/vnd.oci.image.manifest.v1+json, application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.list.v2+json'
          if curl -sf -o /dev/null -H "$ACCEPT" \
              "http://$CI_REGISTRY/v2/${{ matrix.image }}/manifests/$KEY"; then
            echo "hit=true" >> "$GITHUB_OUTPUT"
            echo "::notice::${{ matrix.image }}:$KEY already in the LAN registry — nothing to build"
          else
            echo "hit=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Build
        if: steps.exists.outputs.hit == 'false'
        # --pull is cheap now: base images come through the ci-core pull-through mirror.
        run: |
          docker build --pull ${{ matrix.buildargs }} \
            -f "${{ matrix.dockerfile }}" \
            -t "$CI_REGISTRY/${{ matrix.image }}:$KEY" \
            -t "$CI_REGISTRY/${{ matrix.image }}:latest" \
            ci

      - name: Push
        if: steps.exists.outputs.hit == 'false'
        run: |
          docker push "$CI_REGISTRY/${{ matrix.image }}:$KEY"
          docker push "$CI_REGISTRY/${{ matrix.image }}:latest"

      # A release pins reproducible builder images without any rebuild: copy the key's
      # manifest to a vX.Y.Z tag via the registry API (no image bytes move).
      - name: Tag for release
        if: startsWith(github.ref, 'refs/tags/v')
        run: |
          ACCEPT='Accept: application/vnd.docker.distribution.manifest.v2+json, application/vnd.oci.image.manifest.v1+json, application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.list.v2+json'
          MT=$(curl -sfI -H "$ACCEPT" "http://$CI_REGISTRY/v2/${{ matrix.image }}/manifests/$KEY" \
            | tr -d '\r' | sed -n 's/^[Cc]ontent-[Tt]ype: //p')
          curl -sf -H "$ACCEPT" -o /tmp/manifest.json \
            "http://$CI_REGISTRY/v2/${{ matrix.image }}/manifests/$KEY"
          curl -sf -X PUT -H "Content-Type: $MT" --data-binary @/tmp/manifest.json \
            "http://$CI_REGISTRY/v2/${{ matrix.image }}/manifests/$GITHUB_REF_NAME"

  # The aarch64 CROSS builder — a SEPARATE job because it is `FROM punktfunk-rust-ci:latest`
  # (the LAN copy) and so must not race the matrix entry that publishes that base. Consumed
  # by the arm64 client legs in ci.yml/deb.yml. Its key also folds in rust-toolchain.toml:
  # the Dockerfile installs the aarch64 target against the toolchain the workspace pins.
  builders-arm64cross:
    runs-on: ubuntu-24.04
    needs: builders
    timeout-minutes: 60
    env:
      IMAGE: punktfunk-rust-ci-arm64cross
    steps:
      - uses: actions/checkout@v4

      - name: Content key
        run: |
          git config --global --add safe.directory "$PWD"
          echo "KEY=ck-$(printf '%s%s' "$(git rev-parse HEAD:ci)" "$(git rev-parse HEAD:rust-toolchain.toml)" | sha256sum | cut -c1-12)" >> "$GITHUB_ENV"

      - name: Check whether this key already exists
        id: exists
        run: |
          ACCEPT='Accept: application/vnd.docker.distribution.manifest.v2+json, application/vnd.oci.image.manifest.v1+json, application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.list.v2+json'
          if curl -sf -o /dev/null -H "$ACCEPT" \
              "http://$CI_REGISTRY/v2/$IMAGE/manifests/$KEY"; then
            echo "hit=true" >> "$GITHUB_OUTPUT"
            echo "::notice::$IMAGE:$KEY already in the LAN registry — nothing to build"
          else
            echo "hit=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Build
        if: steps.exists.outputs.hit == 'false'
        # Root context: it needs rust-toolchain.toml to install the target against the
        # toolchain the workspace actually pins.
        run: |
          docker build --pull \
            -f ci/rust-ci-arm64cross.Dockerfile \
            -t "$CI_REGISTRY/$IMAGE:$KEY" \
            -t "$CI_REGISTRY/$IMAGE:latest" \
            .

      - name: Push
        if: steps.exists.outputs.hit == 'false'
        run: |
          docker push "$CI_REGISTRY/$IMAGE:$KEY"
          docker push "$CI_REGISTRY/$IMAGE:latest"

      - name: Tag for release
        if: startsWith(github.ref, 'refs/tags/v')
        run: |
          ACCEPT='Accept: application/vnd.docker.distribution.manifest.v2+json, application/vnd.oci.image.manifest.v1+json, application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.list.v2+json'
          MT=$(curl -sfI -H "$ACCEPT" "http://$CI_REGISTRY/v2/$IMAGE/manifests/$KEY" \
            | tr -d '\r' | sed -n 's/^[Cc]ontent-[Tt]ype: //p')
          curl -sf -H "$ACCEPT" -o /tmp/manifest.json \
            "http://$CI_REGISTRY/v2/$IMAGE/manifests/$KEY"
          curl -sf -X PUT -H "Content-Type: $MT" --data-binary @/tmp/manifest.json \
            "http://$CI_REGISTRY/v2/$IMAGE/manifests/$GITHUB_REF_NAME"

  # Deployable app images — unchanged flow, Gitea registry, per-SHA + release tags.
  apps:
    runs-on: ubuntu-24.04
    timeout-minutes: 45
    strategy:
      matrix:
        include:
          - image: punktfunk-web
            dockerfile: web/Dockerfile
            context: .
          - image: punktfunk-docs
            dockerfile: docs-site/Dockerfile
            context: docs-site
    steps:
      - uses: actions/checkout@v4

      - name: Login to registry
        # Username must be the owner of the REGISTRY_TOKEN PAT, not the push actor.
        run: |
          echo "${{ secrets.REGISTRY_TOKEN }}" \
            | docker login "$REGISTRY" -u enricobuehler --password-stdin

      - name: Build
        run: |
          # On a release tag, also tag the image vX.Y.Z so a release pins reproducible web/docs images.
          EXTRA=""
          case "$GITHUB_REF" in refs/tags/v*) EXTRA="-t $REGISTRY/$OWNER/${{ matrix.image }}:${GITHUB_REF_NAME}" ;; esac
          docker build --pull \
            -f "${{ matrix.dockerfile }}" \
            -t "$REGISTRY/$OWNER/${{ matrix.image }}:latest" \
            -t "$REGISTRY/$OWNER/${{ matrix.image }}:sha-${GITHUB_SHA::8}" \
            $EXTRA \
            "${{ matrix.context }}"

      - name: Push
        run: |
          docker push "$REGISTRY/$OWNER/${{ matrix.image }}:sha-${GITHUB_SHA::8}"
          docker push "$REGISTRY/$OWNER/${{ matrix.image }}:latest"
          case "$GITHUB_REF" in refs/tags/v*) docker push "$REGISTRY/$OWNER/${{ matrix.image }}:${GITHUB_REF_NAME}" ;; esac

  # Deploy the docs site to unom-1, the DMZ services VM website/cms also deploy to
  # (docs.punktfunk.unom.io via Caddy on home-reverse-proxy-1 -> :3220). Same secret set
  # as unom/website's deploy: DEPLOY_HOST/DEPLOY_USER/DEPLOY_PORT/DEPLOY_SSH_KEY (the
  # unom-ci-deploy key).
  deploy-docs:
    runs-on: ubuntu-24.04
    needs: apps
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@v4

      - name: Sync compose file
        # SHA-pinned (not tag-pinned): this action receives DEPLOY_SSH_KEY + host/user/port, so a
        # moved tag would mean credential exfiltration. v0.1.7 = 917f8b8. Bump both the SHA and the
        # trailing version together when upgrading.
        uses: appleboy/scp-action@917f8b81dfc1ccd331fef9e2d61bdc6c8be94634 # v0.1.7
        with:
          host: ${{ secrets.DEPLOY_HOST }}
          username: ${{ secrets.DEPLOY_USER }}
          port: ${{ secrets.DEPLOY_PORT }}
          key: ${{ secrets.DEPLOY_SSH_KEY }}
          source: "compose.production.yml"
          target: "~/punktfunk-docs"
          overwrite: true

      - name: Pull and start docs
        # SHA-pinned: receives DEPLOY_SSH_KEY + REGISTRY_TOKEN (see the scp step above). v1.2.5 = 0ff4204.
        uses: appleboy/ssh-action@0ff4204d59e8e51228ff73bce53f80d53301dee2 # v1.2.5
        env:
          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
        with:
          host: ${{ secrets.DEPLOY_HOST }}
          username: ${{ secrets.DEPLOY_USER }}
          port: ${{ secrets.DEPLOY_PORT }}
          key: ${{ secrets.DEPLOY_SSH_KEY }}
          # Token enters via env, never the script text (keeps it out of run logs).
          envs: REGISTRY_TOKEN
          script: |
            set -euo pipefail
            printf '%s' "$REGISTRY_TOKEN" | docker login git.unom.io -u enricobuehler --password-stdin
            cd ~/punktfunk-docs
            docker compose -f compose.production.yml pull docs
            docker compose -f compose.production.yml up -d --no-build docs