LibreMail/.github/workflows/ci.yml

# SPDX-License-Identifier: GPL-3.0-or-later
name: CI

on:
  pull_request:
    branches: [main]

# A new push to a PR cancels any in-flight run for that PR.
concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

env:
  # SDK packages this project builds against (compileSdk 37 / build-tools 37.0.0).
  # Quote the package ids when passed to sdkmanager — the ';' is a shell separator.
  ANDROID_PLATFORM: "platforms;android-37.0"
  ANDROID_BUILD_TOOLS: "build-tools;37.0.0"

jobs:
  debug-build:
    name: Debug build
    # x86_64: Linux-arm64 runners can't set up this SDK — android-actions/setup-android's sdkmanager
    # fails (exit 1) on the android-37.0 preview platform, and the emulator package has no arm64-Linux
    # build. Build/unit-test results are host-arch-independent anyway (R8/AGP/JVM); real arm64
    # device-ABI coverage would need arm64 emulators, which require macOS hosts.
    runs-on: ubuntu-latest
    steps:
      - name: Check out source
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0

      - name: Set up JDK 21
        uses: actions/setup-java@1bcf9fb12cf4aa7d266a90ae39939e61372fe520 # v5.4.0
        with:
          distribution: temurin
          java-version: "21"

      - name: Set up Android SDK
        uses: android-actions/setup-android@40fd30fb8d7440372e1316f5d1809ec01dcd3699 # v4.0.1

      - name: Install SDK platform and build-tools
        run: sdkmanager "$ANDROID_PLATFORM" "$ANDROID_BUILD_TOOLS"

      - name: Set up Gradle
        uses: gradle/actions/setup-gradle@3f131e8634966bd73d06cc69884922b02e6faf92 # v6.2.0

      - name: Assemble debug APK
        run: ./gradlew assembleDebug --stacktrace

      - name: Upload debug APK
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: debug-apk
          path: app/build/outputs/apk/debug/*.apk
          if-no-files-found: error

  unit-tests:
    name: Unit tests
    runs-on: ubuntu-latest
    steps:
      - name: Check out source
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0

      - name: Set up JDK 21
        uses: actions/setup-java@1bcf9fb12cf4aa7d266a90ae39939e61372fe520 # v5.4.0
        with:
          distribution: temurin
          java-version: "21"

      - name: Set up Android SDK
        uses: android-actions/setup-android@40fd30fb8d7440372e1316f5d1809ec01dcd3699 # v4.0.1

      - name: Install SDK platform and build-tools
        run: sdkmanager "$ANDROID_PLATFORM" "$ANDROID_BUILD_TOOLS"

      - name: Set up Gradle
        uses: gradle/actions/setup-gradle@3f131e8634966bd73d06cc69884922b02e6faf92 # v6.2.0

      - name: Run unit tests
        run: ./gradlew testDebugUnitTest --stacktrace

      - name: Upload unit test report
        if: ${{ !cancelled() }}
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: unit-test-report
          path: app/build/reports/tests/testDebugUnitTest/
          if-no-files-found: warn

  e2e:
    name: E2E
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        # Every Android API level across the rolling ~7-year support window: minSdk (29 / Android 10,
        # 2019) through the latest stable. Each level boots its own emulator and runs the full
        # instrumented + Compose UI (E2E) suite; all of them fan in to the "CI passed" gate. When a
        # new Android ships, add it and drop the oldest level that has aged out of ~7 years. API 37
        # (preview) is NOT in this matrix because emulator-runner can't provision its nonstandard
        # android-37.0 / google_apis_ps16k image (it would wedge the gate) — it's covered separately
        # by the custom-provisioned, non-blocking `e2e-preview` job below. Keep in sync with
        # testOptions.managedDevices in app/build.gradle.kts.
        api-level: [29, 30, 31, 32, 33, 34, 35, 36]
    steps:
      - name: Check out source
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0

      - name: Set up JDK 21
        uses: actions/setup-java@1bcf9fb12cf4aa7d266a90ae39939e61372fe520 # v5.4.0
        with:
          distribution: temurin
          java-version: "21"

      - name: Set up Android SDK
        uses: android-actions/setup-android@40fd30fb8d7440372e1316f5d1809ec01dcd3699 # v4.0.1

      - name: Install SDK platform and build-tools
        run: sdkmanager "$ANDROID_PLATFORM" "$ANDROID_BUILD_TOOLS"

      - name: Set up Gradle
        uses: gradle/actions/setup-gradle@3f131e8634966bd73d06cc69884922b02e6faf92 # v6.2.0

      # The hardware-accelerated emulator needs KVM, which is gated behind a udev rule.
      - 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: Cache AVD snapshot
        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        id: avd-cache
        with:
          path: |
            ~/.android/avd/*
            ~/.android/adb*
          key: avd-${{ matrix.api-level }}-google_apis-x86_64

      # On a cache miss, cold-boot the emulator once so its snapshot can be cached,
      # making subsequent runs start from a warm snapshot.
      - name: Create AVD and generate snapshot for caching
        if: steps.avd-cache.outputs.cache-hit != 'true'
        uses: reactivecircus/android-emulator-runner@e89f39f1abbbd05b1113a29cf4db69e7540cae5a # v2.37.0
        with:
          api-level: ${{ matrix.api-level }}
          target: google_apis
          arch: x86_64
          force-avd-creation: false
          emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
          disable-animations: false
          script: echo "Generated AVD snapshot for caching."

      - name: Run E2E tests
        uses: reactivecircus/android-emulator-runner@e89f39f1abbbd05b1113a29cf4db69e7540cae5a # v2.37.0
        with:
          api-level: ${{ matrix.api-level }}
          target: google_apis
          arch: x86_64
          force-avd-creation: false
          emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
          disable-animations: true
          script: ./gradlew connectedDebugAndroidTest --stacktrace

      - name: Upload E2E test report
        if: ${{ !cancelled() }}
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: e2e-test-report-api${{ matrix.api-level }}
          path: app/build/reports/androidTests/connected/
          if-no-files-found: warn

  # API 37 (Android 17, preview) E2E. Its only system image is the nonstandard
  # android-37.0 / google_apis_ps16k (16 KB page size), which reactivecircus/android-emulator-runner
  # can't provision (it builds android-37 / google_apis, neither of which exists), so this job
  # CUSTOM-PROVISIONS the emulator with sdkmanager/avdmanager/emulator directly. Deliberately
  # NON-BLOCKING: it is NOT in the "CI passed" gate's needs and not a required status check, so a
  # flaky preview can never block merges — it's signal only. When a stable, emulator-runner-friendly
  # API 37 image ships, fold 37 into the main `e2e` matrix and delete this job.
  e2e-preview:
    name: E2E (API 37 preview, non-blocking)
    runs-on: ubuntu-latest
    timeout-minutes: 35
    env:
      API37_IMAGE: "system-images;android-37.0;google_apis_ps16k;x86_64"
    steps:
      - name: Check out source
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0

      - name: Set up JDK 21
        uses: actions/setup-java@1bcf9fb12cf4aa7d266a90ae39939e61372fe520 # v5.4.0
        with:
          distribution: temurin
          java-version: "21"

      - name: Set up Android SDK
        uses: android-actions/setup-android@40fd30fb8d7440372e1316f5d1809ec01dcd3699 # v4.0.1

      - name: Set up Gradle
        uses: gradle/actions/setup-gradle@3f131e8634966bd73d06cc69884922b02e6faf92 # v6.2.0

      # The hardware-accelerated emulator needs KVM, which is gated behind a udev rule.
      - 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

      # Cache the ~1 GB preview system image so only the first run pays the download.
      - name: Cache API 37 system image
        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          # GitHub-hosted ubuntu runners install the SDK at /usr/local/lib/android/sdk; caching the
          # image dir (with its package metadata) lets sdkmanager treat it as installed and skip the
          # re-download on a cache hit.
          path: /usr/local/lib/android/sdk/system-images/android-37.0
          key: sysimg-android-37.0-google_apis_ps16k-x86_64

      - name: Install SDK packages + preview system image
        run: sdkmanager "$ANDROID_PLATFORM" "$ANDROID_BUILD_TOOLS" "platform-tools" "emulator" "$API37_IMAGE"

      - name: Create API 37 AVD
        run: echo "no" | avdmanager create avd -n api37 -k "$API37_IMAGE" -d pixel_2 --force

      - name: Boot emulator and run E2E
        run: |
          set -euo pipefail
          "$ANDROID_SDK_ROOT/emulator/emulator" -avd api37 \
            -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -no-snapshot -camera-back none &
          adb wait-for-device
          timeout 300 bash -c 'while [ "$(adb shell getprop sys.boot_completed | tr -d "\r")" != "1" ]; do sleep 3; done'
          adb shell input keyevent 82 || true
          ./gradlew connectedDebugAndroidTest --stacktrace

      - name: Shut down emulator
        if: always()
        run: adb emu kill || true

      - name: Upload E2E (API 37) report
        if: ${{ !cancelled() }}
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: e2e-test-report-api37-preview
          path: app/build/reports/androidTests/connected/
          if-no-files-found: warn

  # Single aggregating gate so branch protection can require ALL CI jobs with one stable status
  # check. It depends on every job — including each api-level of the E2E matrix — so adding/removing
  # a matrix level needs no change to branch protection (the per-"(api-level)" check names would
  # otherwise have to be re-listed each time).
  ci-passed:
    name: CI passed
    if: always()
    needs: [debug-build, unit-tests, e2e]
    runs-on: ubuntu-latest
    steps:
      - name: Verify every required job succeeded
        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
        run: |
          echo "Required CI jobs did not all succeed:"
          echo "  debug-build: ${{ needs.debug-build.result }}"
          echo "  unit-tests:  ${{ needs.unit-tests.result }}"
          echo "  e2e:         ${{ needs.e2e.result }}"
          exit 1