name: folio

# One spec, three platforms. Dispatch-only: each job boots a device or a
# browser, builds the folio app for that platform, and runs
# examples/folio/sanderling/spec.ts against it.
#
# web and ios are expect-the-bug jobs: folio double-submits a transaction on a
# double tap, so the run is supposed to end with exit 2. Exit 0 means the fuzzer
# stopped finding a bug that is still there; exit 1 means the harness broke. The
# two are worth telling apart, which is why --exit-on-violation exits 2 and not
# 1.
#
# android is a health gate. It convicts in four runs out of five, which is real
# evidence but not a gate: the fifth would report a regression it had not found.
# The budget is set so the conviction it usually gets is reported as a bonus.

on:
  workflow_dispatch:
    inputs:
      platforms:
        description: which legs to run
        type: choice
        options: [all, android, ios, web]
        default: all
      seed:
        description: seed override (0 = each job's calibrated seed)
        default: "0"
      duration:
        description: wall-clock budget per run
        default: 20m
      max-steps:
        description: step budget override (0 = each job's calibrated budget)
        default: "0"

permissions:
  contents: read

jobs:
  android:
    timeout-minutes: 90
    if: ${{ inputs.platforms == 'all' || inputs.platforms == 'android' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      - name: Set up Go
        uses: actions/setup-go@v7
        with:
          go-version-file: go.mod
          cache: true

      - name: Set up the JDKs
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          # The metro gradle plugin folio builds with needs a 21 runtime; the
          # sidecar toolchain pins 17. Both are installed so gradle can pick.
          java-version: |
            17
            21

      - name: Set up Android SDK
        uses: android-actions/setup-android@v4

      - name: Set up bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: "1.3.13"

      - name: Cache Gradle
        uses: actions/cache@v6
        with:
          path: |
            ~/.gradle/caches
            ~/.gradle/wrapper
          key: folio-gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
          restore-keys: |
            folio-gradle-${{ runner.os }}-

      # Without this the emulator falls back to software rendering and every
      # step costs several seconds.
      - name: Enable KVM
        run: |
          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' \
            | sudo tee /etc/udev/rules.d/99-kvm4all.rules
          sudo udevadm control --reload-rules
          sudo udevadm trigger --name-match=kvm

      - name: Build the folio APK
        run: ./gradlew :app:androidApp:assembleDebug
        working-directory: examples/folio

      - name: Build sanderling
        run: make sanderling-android

      - name: Fuzz folio on an emulator
        uses: reactivecircus/android-emulator-runner@v2
        with:
          api-level: 34
          target: google_apis
          arch: x86_64
          emulator-options: -no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim
          disable-animations: true
          script: .github/scripts/folio-run.sh android
        env:
          SEED: ${{ inputs.seed != '0' && inputs.seed || '9' }}
          MAX_STEPS: ${{ inputs.max-steps != '0' && inputs.max-steps || '200' }}
          DURATION: ${{ inputs.duration }}

      - name: Upload the run
        if: always()
        uses: actions/upload-artifact@v7
        with:
          name: folio-android
          path: runs/
          retention-days: 14

  ios:
    timeout-minutes: 90
    if: ${{ inputs.platforms == 'all' || inputs.platforms == 'ios' }}
    runs-on: macos-15
    steps:
      - uses: actions/checkout@v7

      - name: Set up Go
        uses: actions/setup-go@v7
        with:
          go-version-file: go.mod
          cache: true

      - name: Set up bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: "1.3.13"

      # idb-companion is not in homebrew-core, only in facebook/homebrew-fb, so
      # it has to be named by its full tap path. xcodegen and just are core.
      - name: Install idb-companion, xcodegen and just
        run: brew install facebook/fb/idb-companion xcodegen just

      - name: Set up the JDKs
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          # The metro gradle plugin folio builds with needs a 21 runtime; the
          # sidecar toolchain pins 17. Both are installed so gradle can pick.
          java-version: |
            17
            21

      # The iOS app builds its Kotlin framework through the folio gradle
      # project, which configures :app:androidApp and so needs an Android SDK
      # even on this leg.
      - name: Set up Android SDK
        uses: android-actions/setup-android@v4

      # Both asset tarballs are built by the prepare scripts, and the runner
      # bundle is an xcodebuild of companion/Sources. Keyed on the scripts and
      # the versions the Makefile embeds, so a later run reuses them.
      - name: Cache the companion and runner bundles
        uses: actions/cache@v6
        with:
          path: |
            internal/driver/ioscompanion/companionassets/assets
            internal/driver/ioscompanion/runnerassets/assets
          key: ios-assets-${{ runner.os }}-${{ hashFiles('internal/driver/ioscompanion/companionassets/prepare.sh', 'companion/prepare.sh', 'companion/project.yml', 'companion/Sources/**') }}

      - name: Build sanderling
        run: make sanderling-ios

      - name: Boot a simulator
        run: |
          xcrun simctl boot "$IOS_DEVICE" || true
          xcrun simctl bootstatus "$IOS_DEVICE" -b
        env:
          IOS_DEVICE: iPhone 16 Pro

      - name: Build and install folio
        run: just ios
        working-directory: examples/folio
        env:
          IOS_DEVICE: iPhone 16 Pro

      # `just ios` leaves the app running, and the run's first act is to clear
      # its state. Stopping it here means the run always opens the same way.
      - name: Stop the app before the run
        run: xcrun simctl terminate booted app.folio || true

      - name: Fuzz folio on the simulator
        run: .github/scripts/folio-run.sh ios
        env:
          SEED: ${{ inputs.seed != '0' && inputs.seed || '7' }}
          MAX_STEPS: ${{ inputs.max-steps != '0' && inputs.max-steps || '240' }}
          DURATION: ${{ inputs.duration }}
          IOS_DEVICE: iPhone 16 Pro

      - name: Upload the run
        if: always()
        uses: actions/upload-artifact@v7
        with:
          name: folio-ios
          path: runs/
          retention-days: 14

  web:
    timeout-minutes: 60
    if: ${{ inputs.platforms == 'all' || inputs.platforms == 'web' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      - name: Set up Go
        uses: actions/setup-go@v7
        with:
          go-version-file: go.mod
          cache: true

      - name: Set up the JDKs
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          # The metro gradle plugin folio builds with needs a 21 runtime; the
          # sidecar toolchain pins 17. Both are installed so gradle can pick.
          java-version: |
            17
            21

      - name: Set up bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: "1.3.13"

      - name: Cache Gradle
        uses: actions/cache@v6
        with:
          path: |
            ~/.gradle/caches
            ~/.gradle/wrapper
          key: folio-gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
          restore-keys: |
            folio-gradle-${{ runner.os }}-

      - name: Set up Chrome
        uses: browser-actions/setup-chrome@v2
        with:
          chrome-version: stable

      - name: Allow Chrome under unprivileged user namespaces
        run: sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0

      - name: Verify headless Chrome starts
        run: |
          chrome --version
          chrome --headless --no-sandbox --disable-gpu --disable-dev-shm-usage \
            --dump-dom 'data:text/html,<title>ok</title>'

      - name: Build the folio wasmJs app
        run: ./gradlew :app:webApp:wasmJsBrowserDevelopmentExecutableDistribution
        working-directory: examples/folio

      - name: Build sanderling
        run: make sanderling-web

      - name: Fuzz folio in the browser
        run: .github/scripts/folio-run.sh web
        env:
          SEED: ${{ inputs.seed != '0' && inputs.seed || '3' }}
          MAX_STEPS: ${{ inputs.max-steps != '0' && inputs.max-steps || '240' }}
          DURATION: ${{ inputs.duration }}

      - name: Upload the run
        if: always()
        uses: actions/upload-artifact@v7
        with:
          name: folio-web
          path: runs/
          retention-days: 14