Your quick and reliable CircleCI configuration for Android

Android-CircleCI-Awesome.yml

version: 2.1
references:
  #Android Configuration Block
  android_config: &android_config
    working_directory: ~/{MY-APP}
    docker:
      - image: circleci/android:api-29
    environment:
      _JAVA_OPTIONS: -Xmx2048m -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap
      GRADLE_OPTS: -Xmx2048m -XX:+HeapDumpOnOutOfMemoryError -Dorg.gradle.caching=true -Dorg.gradle.configureondemand=true -Dkotlin.compiler.execution.strategy=in-process -Dkotlin.incremental=false
commands:
  #Steps For Build
  restore_gradle_cache:
    description: "Restore gradle cache"
    steps:
      - restore_cache:
          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
  restore_ruby_cache:
    description: "Restore gem/rails cache"
    steps:
      - restore_cache:
          key: gems-{{ checksum "Gemfile.lock" }}
  decode_signing_props:
    description: "Read android gradle signing props file from circle ci env"
    steps:
      # Convert your signing.props file using the following command
      # base64 /path/to/signing.properties > signing_props.txt
      # The below ling will rollback the base64 into a file as on your local machine
      # Make sure to have an entry SIGNING_CONFIG in envirnoment variables in CircleCI project settings page
      - run: echo $SIGNING_CONFIG | base64 -d > signing.properties
  decode_signing_key:
    description: "Read android signing key from circle ci env"
    steps:
      # Convert your keystore file using the following command
      # base64 /path/to/keystore.jks > keystore_as_base_64.txt
      # The below ling will rollback the base64 into a file as on your local machine
      # Make sure to have an entry KEYSTORE_BASE64 in envirnoment variables in CircleCI project settings page
      - run: echo $KEYSTORE_BASE64 | base64 -d > {MY_APP_BETA}.jks
  check_ruby_dependencies:
    description: "Check if any dependencies in GemFile is missing"
    steps:
      - run: bundle check || bundle install --path vendor/bundle
      - run: bundle update fastlane
  check_firebase_cli_installed:
    description: "Check if firebase CLI is installed"
    steps:
      - run: curl -sL firebase.tools | bash
  exec_build_for_{MY_APP_BETA}_via_fastlane:
    description: "Run Fastlane for {MY_APP_BETA} beta build"
    steps:
      - run: bundle exec fastlane {MY_APP_BETA}
  save_gradle_cache:
    description: "Save last synced gradle cache after build"
    steps:
      - save_cache:
          key: jars-{{ checksum "build.gradle" }}-{{ checksum "app/build.gradle" }}
          paths:
            - ~/.gradle
  save_ruby_cache:
    description: "Save last synced ruby cached after build"
    steps:
      - save_cache:
          key: gems-{{ checksum "Gemfile.lock" }}
          paths:
            - vendor/bundle
jobs:
  betaBuild:
    <<: *android_config
    steps:
      - checkout
      - restore_gradle_cache
      - restore_ruby_cache
      - decode_signing_props
      - decode_signing_key
      - check_ruby_dependencies
      - check_firebase_cli_installed
      - exec_build_for_{MY_APP_BETA}_via_fastlane
      - save_gradle_cache
      - save_ruby_cache
workflows:
  version: 2.1
  betaBuild:
    jobs:
      - betaBuild:
          filters:
            branches:
              only: {MY_APP_BETA_BRANCH}