noitu/.github/workflows/ci.yml

# Tests and packaging.
#
# Nothing here downloads the 179 MB upstream dictionary except the release
# image build. Everything else plays against the small database derived from
# the checked-in word sample, which goes through the same builder the real one
# does.
#
# The wire contract has its own workflow: see proto.yml.
name: ci

on:
  push:
    branches: [main]
  pull_request:
  release:
    types: [published]

permissions:
  contents: read

jobs:
  go:
    name: Go
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
        with:
          go-version-file: server/go.mod
          cache-dependency-path: server/go.sum

      - name: Vet
        run: go vet ./...
        working-directory: server

      # -race because the whole transport layer is goroutines and timers, and a
      # data race there is exactly the kind of defect that passes without it.
      - name: Test
        run: go test ./... -race
        working-directory: server

  web:
    name: Frontend
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 24
          cache: npm
          cache-dependency-path: web/package-lock.json

      - run: npm ci
        working-directory: web

      - name: Type check
        run: npm run check
        working-directory: web

      # npm test builds first, so this also proves the bundle compiles and
      # carries no wordlist.
      - name: Test
        run: npm test
        working-directory: web

  e2e:
    name: End to end
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
        with:
          go-version-file: server/go.mod
          cache-dependency-path: server/go.sum
      - uses: actions/setup-node@v4
        with:
          node-version: 24
          cache: npm
          cache-dependency-path: web/package-lock.json

      - name: Build the fixture dictionary
        run: go run ./cmd/build-dictionary --words ../testdata/fixture-words.txt --out ../data/fixture.db --min-words 150
        working-directory: server

      - run: npm ci
        working-directory: web

      - name: Install the browser
        run: npx playwright install --with-deps chromium
        working-directory: web

      - name: Run the suite
        run: npm run test:e2e
        working-directory: web

      # test-results holds the traces a failure leaves behind, which is what is
      # actually worth downloading; the HTML report is not generated here.
      - uses: actions/upload-artifact@v4
        if: failure()
        with:
          name: playwright-traces
          path: web/test-results/
          retention-days: 7

  image:
    name: Container image
    runs-on: ubuntu-latest
    # e2e too: the moment this job gains a publish step, an image built past a
    # red browser suite is an image nobody meant to ship.
    needs: [go, web, e2e]
    steps:
      - uses: actions/checkout@v4

      # On a release the image is built from the real upstream release, which
      # is the only job in this file that downloads it. Every other run builds
      # the same Dockerfile against the fixture word list, so a broken image is
      # caught on the pull request rather than at release time.
      - name: Build
        run: |
          if [ "${{ github.event_name }}" = "release" ]; then
            docker build -t noitu:ci .
          else
            docker build --build-arg FIXTURE_DICT=1 -t noitu:ci .
          fi

      # CC BY-SA 4.0 applies to the derived wordlist wherever it is
      # distributed, and an image is distribution. This is the assertion that
      # the obligation actually shipped.
      - name: The licence travels with the data
        run: |
          set -eu
          docker create --name check noitu:ci
          docker export check | tar -t > files.txt
          docker rm check

          for required in app/data/LICENSE app/data/ATTRIBUTION.md app/NOTICE app/data/noitu.db; do
            grep -qx "$required" files.txt || { echo "missing from the image: $required"; exit 1; }
          done

          # The 179 MB source must never reach the final image.
          if grep -q 'dictionary\.db$' files.txt; then
            echo "the upstream dictionary leaked into the image"
            exit 1
          fi

      - name: It serves a game
        run: |
          set -eu
          docker run -d --name noitu -p 8080:8080 noitu:ci
          for _ in $(seq 1 30); do
            if curl -fsS http://localhost:8080/healthz >/dev/null 2>&1; then break; fi
            sleep 1
          done
          curl -fsS http://localhost:8080/healthz
          # A deep link is a client route, so the binary has to answer it with
          # the app shell rather than a 404.
          curl -fsS -o /dev/null -w '%{http_code}\n' 'http://localhost:8080/play?difficulty=2' | grep -qx 200
          docker rm -f noitu