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Cirrus CI Android Templates

Templates for getting started with Cirrus CI for Android.

If you want to learn more about Cirrus CI and why you might want to use it for Android, here's an article I wrote: Exploring Cirrus CI for Android.

Installing Cirrus CI

  • Go to the Cirrus CI Application on GitHub Marketplace and setup a plan for your account or organization.
  • Add a .cirrus.yml file in your project's root directory.

Now you're ready to use the following templates as a starting point for writing your CI tasks.

Assembing APKs and Running Checks

The following task assembles the APKs from the app module and runs all checks (unit tests and Android Lint).

assemble_and_check_task:
  timeout_in: 10m
  # trigger the task on commits on the main branch or any pull request
  only_if: $CIRRUS_BRANCH == "main" || CIRRUS_PR != ""
  env:
    JAVA_TOOL_OPTIONS: -Xmx6g
    GRADLE_OPTS: -Dorg.gradle.daemon=false -Dkotlin.incremental=false -Dkotlin.compiler.execution.strategy=in-process
  container:
    image: reactivecircus/android-sdk:latest
    cpu: 8
    memory: 16G
  assemble_and_check_script:
    ./gradlew app:assemble check

Running Instrumented Tests

The following task runs instrumented tests from all modules on API 21, 23, and 28.

The task also uses the skip keyword to skip the task unless there are changes to any Kotlin, XML or Gradle sources in the commit or pull request.

connected_check_task:
  # custom task name
  name: Run Android instrumented tests (API $API_LEVEL)
  # timeout in 30 minutes
  timeout_in: 30m
  only_if: $CIRRUS_BRANCH == "main" || CIRRUS_PR != ""
  # skip the task unless sources have changed
  skip: "!changesInclude('.cirrus.yml', '*.gradle', '*.gradle.kts', '**/*.gradle', '**/*.gradle.kts', '*.properties', '**/*.properties', '**/*.kt', '**/*.xml')"
  env:
    matrix:
      - API_LEVEL: 21
      - API_LEVEL: 23
      - API_LEVEL: 28
    JAVA_TOOL_OPTIONS: -Xmx6g
    GRADLE_OPTS: -Dorg.gradle.daemon=false -Dkotlin.incremental=false -Dkotlin.compiler.execution.strategy=in-process
  container:
    image: reactivecircus/android-emulator-${API_LEVEL}:latest
    kvm: true
    cpu: 8
    memory: 24G
  create_device_script:
    echo no | avdmanager create avd --force --name "api-${API_LEVEL}" --abi "${TARGET}/${ARCH}" --package "system-images;android-${API_LEVEL};${TARGET};${ARCH}"
  start_emulator_background_script:
    $ANDROID_HOME/emulator/emulator -avd "api-${API_LEVEL}" -no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim -camera-back none
  assemble_instrumented_tests_script:
    ./gradlew assembleDebugAndroidTest
  wait_for_emulator_script:
    adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed) ]]; do sleep 3; done; input keyevent 82'
  disable_animations_script: |
    adb shell settings put global window_animation_scale 0.0
    adb shell settings put global transition_animation_scale 0.0
    adb shell settings put global animator_duration_scale 0.0
  run_instrumented_tests_script:
    ./gradlew connectedDebugAndroidTest

Publishing Library Snapshot Release

The following config builds, tests and publishes a snapshot release for a multi-module library project. There are 3 tasks:

  • assemble_and_check_task - build the AAR and run all checks on each module
  • connected_check_task - run instrumented tests from all modules on API 21, 23, and 28.
  • publish_artifacts_task - after successful execution of both assemble_and_check_task and connected_check_task, deploy the snapshot build to Nexus Sonatype repository

Sonatype credentials can be encrypted on Cirrus CI and safely added to the .cirrus.yml file.

assemble_and_check_task:
  only_if: $CIRRUS_BRANCH == "main" || CIRRUS_PR != ""
  env:
    JAVA_TOOL_OPTIONS: -Xmx6g
    GRADLE_OPTS: -Dorg.gradle.daemon=false
  container:
    image: reactivecircus/android-sdk:latest
    cpu: 8
    memory: 16G
  assemble_and_check_script:
    ./gradlew assemble check

connected_check_task:
  only_if: $CIRRUS_BRANCH == "main" || CIRRUS_PR != ""
  env:
    matrix:
      - API_LEVEL: 21
      - API_LEVEL: 23
      - API_LEVEL: 28
    JAVA_TOOL_OPTIONS: -Xmx6g
    GRADLE_OPTS: -Dorg.gradle.daemon=false
  container:
    image: reactivecircus/android-emulator-${API_LEVEL}:latest
    kvm: true
    cpu: 8
    memory: 24G
  create_device_script:
    avdmanager create avd --force --name "api-${API_LEVEL}" --abi "${TARGET}/${ARCH}" --package "system-images;android-${API_LEVEL};${TARGET};${ARCH}" --device "Nexus 6"
  start_emulator_background_script:
    $ANDROID_HOME/emulator/emulator -avd "api-${API_LEVEL}" -no-window -no-snapshot -noaudio -no-boot-anim -camera-back none
  assemble_instrumented_tests_script:
    ./gradlew assembleDebugAndroidTest
  wait_for_emulator_script:
    adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed) ]]; do sleep 3; done; input keyevent 82'
  disable_animations_script:
    - adb shell settings put global window_animation_scale 0.0
    - adb shell settings put global transition_animation_scale 0.0
    - adb shell settings put global animator_duration_scale 0.0
  run_instrumented_tests_script:
    ./gradlew connectedDebugAndroidTest

publish_artifacts_task:
  depends_on:
    - assemble_and_check
    - connected_check
  env:
    JAVA_TOOL_OPTIONS: -Xmx6g
    GRADLE_OPTS: -Dorg.gradle.daemon=false
    SONATYPE_NEXUS_USERNAME: ENCRYPTED[xxx]
    SONATYPE_NEXUS_PASSWORD: ENCRYPTED[xxx]
  container:
    image: reactivecircus/android-sdk:latest
    cpu: 8
    memory: 16G
  deploy_snapshot_script:
    ./gradlew clean androidSourcesJar androidJavadocsJar uploadArchives --no-daemon --no-parallel

Local Gradle Build Cache

The following task uses the cache instruction to cache the ~/.gradle/cache directory:

assemble_and_check_task:
  only_if: $CIRRUS_BRANCH == "main" || CIRRUS_PR != ""
  env:
    JAVA_TOOL_OPTIONS: -Xmx6g
    GRADLE_OPTS: -Dorg.gradle.daemon=false
  container:
    image: reactivecircus/android-sdk:latest
    cpu: 8
    memory: 16G
  gradle_cache:
    folder: ~/.gradle/caches
    # replace buildSrc/dependencies.gradle with whatever file you put your dependency versions in
    fingerprint_script: cat buildSrc/dependencies.gradle && cat gradle/wrapper/gradle-wrapper.properties
  assemble_and_check_script:
    ./gradlew assemble check
  # cleanup non-deterministic files to avoid unnecessary cache upload 
  cleanup_script:
    - rm -rf ~/.gradle/caches/[0-9].*
    - rm -rf ~/.gradle/caches/transforms-1
    - rm -rf ~/.gradle/caches/journal-1
    - rm -rf ~/.gradle/caches/jars-3/*/buildSrc.jar
    - find ~/.gradle/caches/ -name "*.lock" -type f -delete

Remote Gradle Build Cache

Cirrus CI also supports Gradle's remote HTTP build cache.

Follow the instructions to setup remote build cache for your project.

No change to the .cirrus.yml file is required.

Archiving Test Results

The following task stores the test results as JUnit XML artifacts which can be accessed from the build dashboard.

assemble_and_check_task:
  only_if: $CIRRUS_BRANCH == "main" || CIRRUS_PR != ""
  env:
    JAVA_TOOL_OPTIONS: -Xmx6g
    GRADLE_OPTS: -Dorg.gradle.daemon=false
  container:
    image: reactivecircus/android-sdk:latest
    cpu: 8
    memory: 16G
  assemble_and_check_script:
    ./gradlew assemble check
  always:
    junit_artifacts:
      path: "**/test-results/**/*.xml"
      type: text/xml
      format: junit

Delaying task execution - Required PR Labels

The following task will only be run after the required initial-review label has been added to the pull request.

connected_check_task:
  required_pr_labels: initial-review
  only_if: $CIRRUS_BRANCH == "main" || CIRRUS_PR != ""
  env:
    matrix:
      - API_LEVEL: 21
      - API_LEVEL: 23
      - API_LEVEL: 28
    JAVA_TOOL_OPTIONS: -Xmx6g
    GRADLE_OPTS: -Dorg.gradle.daemon=false -Dkotlin.incremental=false -Dkotlin.compiler.execution.strategy=in-process
  container:
    image: reactivecircus/android-emulator-${API_LEVEL}:latest
    kvm: true
    cpu: 8
    memory: 24G
  create_device_script:
    echo no | avdmanager create avd --force --name "api-${API_LEVEL}" --abi "${TARGET}/${ARCH}" --package "system-images;android-${API_LEVEL};${TARGET};${ARCH}"
  start_emulator_background_script:
    $ANDROID_HOME/emulator/emulator -avd "api-${API_LEVEL}" -no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim -camera-back none
  assemble_instrumented_tests_script:
    ./gradlew assembleDebugAndroidTest
  wait_for_emulator_script:
    adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed) ]]; do sleep 3; done; input keyevent 82'
  disable_animations_script: |
    adb shell settings put global window_animation_scale 0.0
    adb shell settings put global transition_animation_scale 0.0
    adb shell settings put global animator_duration_scale 0.0
  run_instrumented_tests_script:
    ./gradlew connectedDebugAndroidTest

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Templates for getting started with Cirrus CI for Android.

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