name: Gates

# Every blocking check lives here, and nowhere else. ci.yml calls it on push
# and pull_request; release.yml calls it before it builds anything publishable
# (milestone-14 ruling 7). Keeping the packaging and container checks in this
# file — not only the three test jobs — is the point: a release must not be
# able to skip the checks that guard the artifacts it publishes.
#
# Every action here is pinned to a full commit SHA, on the same grounds as
# release.yml (ruling 7). The ruling's carve-out — "ci.yml may keep moving
# tags; it holds no secrets" — does not reach this file: release.yml *calls*
# it, so these jobs run on the same self-hosted runner host and against the
# same docker daemon as the job holding the signing subkey and the registry
# token. A moved tag upstream would execute there. ci.yml itself still uses no
# third-party action; its only `uses:` is this workflow.
#
# Resolved with `git ls-remote <repo> refs/tags/vN 'refs/tags/vN^{}'` — the
# three originals on 2026-08-07, the two artifact actions on 2026-08-12. Every
# tag pinned here is lightweight — no `^{}` peel row — so the listed SHA is the
# commit. download-artifact's `v3-node20` is the exception that proves the
# rule: it is annotated, and its peel row names a different commit than the tag
# object. This file pins `v3.1.0-node20`, which is lightweight.
#
# The artifact actions are pinned to v3, and to the node20 rebuilds of v3, for
# two separate reasons.
#
# v4 and v5 abort in the *client*, not the server. @actions/artifact asks
# isGhes(), Gitea answers the way GitHub Enterprise Server does, and the action
# refuses before it uploads anything. The server side is present: Gitea 1.27.1
# routes the whole v4 twirp service — CreateArtifact, FinalizeArtifact,
# ListArtifacts, GetSignedArtifactURL and DeleteArtifact all answer 401, where
# an unrouted path answers 404. The forks that patch isGhes() out are
# third-party code, which is what the pinning rule above exists to keep away
# from the job that holds the signing subkey.
#
# The stock v3 tags — upload ff15f030 (v3.2.1), download 9bc31d5c (v3.0.2) —
# declare `using: node16`, and a runner is not required to still ship a node16.
# The `-node20` rebuilds are that same action code on a runtime that exists.
on:
  workflow_call:

env:
  ZIG_VERSION: "0.16.0"
  # Exact patch, not a floating "24" (milestone-14 ruling 12): the bundled npm
  # and the emitted bundle change under a floating major.
  NODE_VERSION: "24.19.0"
  # There is deliberately no CI_VERSION literal here. Ruling 2 allows the
  # version to exist in the tag and in build.zig.zon and nowhere else, and
  # ruling 5 makes verify-dist fail when the version under build disagrees with
  # build.zig.zon. An invented CI string such as "0.0.0-ci" therefore cannot
  # pass this file's own packaging gate. The package job reads the version out
  # of build.zig.zon instead, and the container job takes it from that job's
  # output.

jobs:
  test:
    runs-on: ubuntu-24.04

    steps:
      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0

      - name: Set up Zig
        uses: mlugg/setup-zig@d1434d08867e3ee9daa34448df10607b98908d29 # v2.2.1
        with:
          version: ${{ env.ZIG_VERSION }}

      # zig 0.16.0's package fetcher creates tmp/<hex>.zip inside the global
      # cache without creating tmp/ first (src/Package/Fetch.zig:1499), and
      # setup-zig's restored cache never contains tmp/. Without this, every
      # dependency fetch dies with "failed to create temporary zip file:
      # FileNotFound" before any network I/O.
      - name: Create the fetch temp dir zig assumes
        run: mkdir -p "${ZIG_GLOBAL_CACHE_DIR:?}/tmp"

      - name: Run test suite (unit + hermetic loopback integration)
        run: zig build test -Dintegration

  test-aarch64:
    runs-on: ubuntu-24.04

    steps:
      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0

      - name: Set up Zig
        uses: mlugg/setup-zig@d1434d08867e3ee9daa34448df10607b98908d29 # v2.2.1
        with:
          version: ${{ env.ZIG_VERSION }}

      # zig 0.16.0's package fetcher creates tmp/<hex>.zip inside the global
      # cache without creating tmp/ first (src/Package/Fetch.zig:1499), and
      # setup-zig's restored cache never contains tmp/. Without this, every
      # dependency fetch dies with "failed to create temporary zip file:
      # FileNotFound" before any network I/O.
      - name: Create the fetch temp dir zig assumes
        run: mkdir -p "${ZIG_GLOBAL_CACHE_DIR:?}/tmp"

      # qemu-user, not qemu-user-static: Zig execs the bare `qemu-aarch64`
      # name, and the -static package only ships `qemu-aarch64-static`.
      - name: Install qemu-user
        run: |
          sudo apt-get update -qq
          sudo apt-get install -qq -y --no-install-recommends qemu-user

      - name: Run test suite under qemu (plain suite, no -Dintegration)
        run: zig build test-aarch64 -fqemu

  frontend:
    # The light runner, a second act_runner at capacity 1 that advertises only
    # this label. This job peaks around 355 MB (tsc), well inside that runner's
    # 1536Mi dind limit, and it runs no docker command — so it overlaps the
    # heavy runner's zig and image work instead of queueing behind it.
    runs-on: ubuntu-24.04-light

    steps:
      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0

      - name: Set up Node
        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: npm
          cache-dependency-path: admin/package-lock.json

      - name: Install dependencies
        working-directory: admin
        run: npm ci

      - name: Check formatting
        working-directory: admin
        run: npm run format:check

      - name: Lint
        working-directory: admin
        run: npm run lint

      - name: Typecheck
        working-directory: admin
        run: npm run typecheck

      - name: Run tests
        working-directory: admin
        run: npm test

      - name: Build
        working-directory: admin
        run: npm run build

      # The licence inventory has to cover every package whose bytes ship, and
      # the lockfile does not answer that question: it lists what could be
      # reached, not what rollup kept. The bundle is what this reads. The logic
      # lives in admin/scripts/, unit-tested by `npm test`, so it runs on a laptop
      # exactly as it runs here (milestone-14 deviation 24).
      - name: Assert the packages bundled into admin/dist are the recorded ones
        working-directory: admin
        run: npm run assert-bundled

      # The package and container jobs consume this bundle instead of building
      # their own. The upload is last on purpose: a bundle that failed the
      # licence inventory or any check above must not reach the jobs that
      # package it into a tarball and an image.
      #
      # Artifact names are scoped to the run, so the ci.yml and release.yml
      # runs that share this runner cannot read each other's.
      #
      # A later move to v4 has to add `include-hidden-files: true` here.
      # `npm run build` writes the freshness stamp to the hidden file
      # admin/dist/.src-hash (milestone-15 ruling 5), and v4.4.0 and later drop
      # dotfiles by default. It is inactive today — v3 keeps them, and the
      # package job's target path skips the stamp check regardless — but a move
      # to v4 that also pointed the download back at admin/dist would fail with
      # "admin/dist is stale".
      - name: Upload the built web UI
        uses: actions/upload-artifact@c24449f33cd45d4826c6702db7e49f7cdb9b551d # v3.2.1-node20
        with:
          name: admin-dist
          path: admin/dist
          if-no-files-found: error

  package:
    needs: [frontend]
    runs-on: ubuntu-24.04

    # The container job needs the version and installs no Zig, so it cannot read
    # build.zig.zon the way this job does.
    outputs:
      version: ${{ steps.zon-version.outputs.version }}

    steps:
      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0

      - name: Set up Zig
        uses: mlugg/setup-zig@d1434d08867e3ee9daa34448df10607b98908d29 # v2.2.1
        with:
          version: ${{ env.ZIG_VERSION }}

      # zig 0.16.0's package fetcher creates tmp/<hex>.zip inside the global
      # cache without creating tmp/ first (src/Package/Fetch.zig:1499), and
      # setup-zig's restored cache never contains tmp/. Without this, every
      # dependency fetch dies with "failed to create temporary zip file:
      # FileNotFound" before any network I/O.
      - name: Create the fetch temp dir zig assumes
        run: mkdir -p "${ZIG_GLOBAL_CACHE_DIR:?}/tmp"

      # `dist` refuses admin/dist-placeholder (ruling 4), so a real bundle has to
      # exist before the packaging gate runs. It arrives from the frontend job,
      # already formatted, linted, typechecked, tested and licence-checked.
      #
      # The target is deliberately not `admin/dist`: build.zig runs the freshness
      # stamp check for that exact path and no other (milestone-15 ruling 5),
      # and the check shells out to `node`. Here it would buy nothing — the
      # stamp hashes the admin/ sources, not the bundle, so against a checkout of
      # the same commit that built the bundle it can only agree. An explicit
      # path is the case build.zig documents for a bundle built elsewhere, and
      # taking it keeps node out of this job entirely.
      - name: Download the web UI built by the frontend job
        uses: actions/download-artifact@ad191675b41f6a5b46da9a048cb6893812da158b # v3.1.0-node20
        with:
          name: admin-dist
          path: admin-dist-ci

      # Ruling 2: build.zig.zon is the only place besides the tag that carries
      # the version, and ruling 5 makes verify-dist assert the two agree. The
      # gate builds the version the repository declares.
      #
      # This is the only job that reads it. The container job used to run its own
      # `sed` over the same file; it now receives this step's output, so the two
      # jobs cannot disagree about what the repository declares. The parse itself
      # matches verify-dist's, through the zon grammar rather than a regex.
      - name: Build the container gate tool
        run: zig build container-check-tool

      - name: Read the version from build.zig.zon
        id: zon-version
        run: ./zig-out/bin/container_check version

      - name: Build the release artifacts
        run: |
          set -euo pipefail
          zig build dist \
            -Dversion-string="$CI_VERSION" \
            -Dgit-commit="$GITHUB_SHA" \
            -Dadmin-dist=admin-dist-ci \
            -Doptimize=ReleaseSafe

      # verify-dist owns every assert the CI shell used to make: ELF static
      # linkage, the 15,728,640-byte stripped budget, the archive layout and
      # modes, `nxdns version`, the build.zig.zon version, and the separate
      # 10,485,760-byte asset-free build (ruling 5). That is why the objcopy
      # and binutils-aarch64-linux-gnu install and the two inline size-assert
      # shell blocks are gone from this file: the checks live in the build
      # graph now and run identically on a laptop.
      - name: Verify the release artifacts
        run: |
          set -euo pipefail
          zig build verify-dist \
            -Dversion-string="$CI_VERSION" \
            -Dgit-commit="$GITHUB_SHA" \
            -Dadmin-dist=admin-dist-ci \
            -Doptimize=ReleaseSafe

      # deploy/docker/Dockerfile copies both of these trees and nothing else
      # out of zig-out/dist: the binary comes from dist/bin/<triple>/, and
      # /LICENSE and /THIRD-PARTY-NOTICES come from the matching dist/stage/
      # directory, which the container job then hashes against the image. The
      # tarballs and SHA256SUMS stay behind — no later job reads them, and
      # verify-dist has already checked them here.
      #
      # The zip round-trip drops the executable bit. That is survivable only
      # because the Dockerfile chmods the binary itself and the contents
      # assertion compares sha256 of file contents, never modes. The archive
      # modes are asserted by verify-dist, above, on the originals. The gate tool
      # rides along in the same artifact and the container job chmods it back.
      #
      # Adding zig-out/bin/container_check moves the artifact's common root from
      # zig-out/dist up to zig-out, which is why the container job restores into
      # zig-out rather than zig-out/dist. The Dockerfile's COPY paths still
      # resolve; they are relative to the repository root either way.
      - name: Upload the staged payload for the container job
        uses: actions/upload-artifact@c24449f33cd45d4826c6702db7e49f7cdb9b551d # v3.2.1-node20
        with:
          name: dist-payload
          path: |
            zig-out/dist/bin
            zig-out/dist/stage
            zig-out/bin/container_check
          if-no-files-found: error

  container:
    needs: [package]
    runs-on: ubuntu-24.04

    env:
      # Ruling 2 and ruling 5: one parse of build.zig.zon per run, done in the
      # package job. This job installs no Zig and cannot repeat it.
      CI_VERSION: ${{ needs.package.outputs.version }}

    steps:
      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0

      # Restored under zig-out because that is where the Dockerfile's COPY lines
      # look for dist/, with the repository root as the build context, and
      # because the payload also carries bin/container_check. This job compiles
      # nothing and bundles nothing: the payload is the one the package job
      # already built and verify-dist already checked, which is also the point —
      # an image built from a second, independent `dist` run would prove nothing
      # about the artifacts the release publishes.
      - name: Download the staged payload built by the package job
        uses: actions/download-artifact@ad191675b41f6a5b46da9a048cb6893812da158b # v3.1.0-node20
        with:
          name: dist-payload
          path: zig-out

      # The artifact zip carries no modes.
      - name: Restore the gate tool's executable bit
        run: chmod +x zig-out/bin/container_check

      # Everything this gate decides — this run's docker object names, the
      # ownership label, the image build, the contents assertion against the
      # staged payload, and the smoke test with its topology detection and its
      # absolute probe deadline — lives in tools/container_check.zig, along with
      # the rationale comments that used to sit in this file. That is the same
      # move release.yml made (milestone-14 deviation 24): logic in a `run:`
      # block cannot be type-checked, run on a laptop, or covered by a test.
      - name: Run the container acceptance gate
        run: ./zig-out/bin/container_check gate

      # The gate removes its own container and image on every exit path it
      # survives. This step is the exit path for a cancelled job and for a step
      # that died before the gate's own defers ran — on a long-lived self-hosted
      # daemon those accumulate one layer set per run. The name pair only exists
      # if the gate got as far as writing $GITHUB_ENV, so the label sweep covers
      # the rest of this run.
      #
      # It covers no more than that. `always()` does not run when the runner or
      # the pod itself dies, and the filter below names THIS attempt's label
      # value exactly — deliberately, since a concurrent run of another
      # repository must not be swept, but that also means a later attempt cannot
      # collect an earlier one's leak. What the label buys for those cases is
      # discovery, not recovery: `docker ps -a --filter
      # label=net.mial.nxdns.ci` and the matching `docker images` list every
      # object this workflow has ever left behind, with the repository, run and
      # attempt that owns each one. Reclaiming them is a manual sweep today, and
      # the hook a janitor job would use later.
      - name: Remove this run's docker objects
        if: always()
        env:
          CI_LABEL: net.mial.nxdns.ci=${{ github.repository }}/${{ github.run_id }}/${{ github.run_attempt }}
        run: |
          set -uo pipefail
          if [ -n "${SMOKE_NAME:-}" ]; then
            docker rm -f "$SMOKE_NAME" >/dev/null 2>&1 || true
          fi
          if [ -n "${CI_IMAGE:-}" ]; then
            docker image rm -f "$CI_IMAGE" >/dev/null 2>&1 || true
          fi
          for cid in $(docker ps -aq --filter "label=$CI_LABEL"); do
            docker rm -f "$cid" >/dev/null 2>&1 || true
          done
          for iid in $(docker images -q --filter "label=$CI_LABEL"); do
            docker image rm -f "$iid" >/dev/null 2>&1 || true
          done
          exit 0