Use for inspiration

react-native-circleCI-example-config.yml

# Taking from this blogPost: https://medium.com/@tjkangs/travisci-circleci-2-0-with-fastlane-for-react-native-both-ios-and-android-3f99b71b8691

aliases:
  # Cache Management
  - &restore-yarn-cache
    keys:
      - yarn-{{ arch }}-{{ .Branch }}-{{ checksum "package.json" }}
      # Fallback in case checksum fails
      - yarn-{{ arch }}-{{ .Branch }}-
      # Fallback in case this is a first-time run on a fork
      - yarn-{{ arch }}-master-
  - &save-yarn-cache
    paths:
      - node_modules
      - ~/.cache/yarn
    key: yarn-{{ arch }}-{{ .Branch }}-{{ checksum "package.json" }}
 
  - &restore-react-native-cli
    keys:
      - react-native-cli-{{ arch }}
  - &save-react-native-cli
    paths:
      - node_modules
    key: react-native-cli-{{ arch }}
 
  - &restore-fastlane
    keys:
      - fastlane-{{ arch }}
  - &save-fastlane
    paths:
      - ~/.fastlane
    key: fastlane-{{ arch }}
 
  - &restore-gem-android
    keys:
      - gem-{{ arch }}-{{ .Branch }}-{{ checksum "android/Gemfile.lock" }}
      # Fallback in case checksum fails
      - gem-{{ arch }}-{{ .Branch }}-
      # Fallback in case this is a first-time run on a fork
      - gem-{{ arch }}-master-
  - &save-gem-android
    paths:
      - android/vendor/bundle
    key: gem-{{ arch }}-{{ .Branch }}-{{ checksum "android/Gemfile.lock" }}
   
  - &restore-gem-ios
    keys:
      - gem-{{ arch }}-{{ .Branch }}-{{ checksum "ios/Gemfile.lock" }}
      # Fallback in case checksum fails
      - gem-{{ arch }}-{{ .Branch }}-
      # Fallback in case this is a first-time run on a fork
      - gem-{{ arch }}-master-
  - &save-gem-ios
    paths:
      - ios/vendor/bundle
    key: gem-{{ arch }}-{{ .Branch }}-{{ checksum "ios/Gemfile.lock" }}
 
  - &restore-cocoapods
    keys:
      - cocoapods-{{ arch }}-{{ .Branch }}-{{ checksum "ios/Podfile.lock" }}
      # Fallback in case checksum fails
      - cocoapods-{{ arch }}-{{ .Branch }}-
      # Fallback in case this is a first-time run on a fork
      - cocoapods-{{ arch }}-master-
  - &save-cocoapods
    paths:
      - ~/.cocoapods
      - ios/Pods
    key: cocoapods-{{ arch }}-{{ .Branch }}-{{ checksum "ios/Podfile.lock" }}
 
 
  # Dependency Management
  - &install-react-native-cli
    name: Install react-native-cli
    command: npm install react-native-cli
 
  - &install-fastlane-ios
    name: Install fastlane
    command: |
      brew update
      brew install ruby
      brew cask install fastlane
   
  - &install-fastlane-android
    name: Install fastlane
    command: gem install fastlane
 
  - &yarn
    name: Install Node Dependencies
    command: |
      # rm -rf node_modules
      yarn install --non-interactive --cache-folder ~/.cache/yarn
   
  - &install-gem-android
    name: Install Gemfile
    command: |
      cd android
      bundle update
      gem install json
      bundle install --path vendor/bundle
 
  - &install-gem-ios
    name: Install Gemfile
    command: |
      cd ios
      bundle update
      gem install json
      bundle install --path vendor/bundle
 
  - &install-cocoapods
    name: Install CocoaPods
    command: |
      cd ios
      bundle exec pod update
 
version: 2
jobs:
  build:
    working_directory: ~/project
    docker:
      - image: circleci/node:8
 
    steps:
      - checkout
 
      - restore-cache: *restore-yarn-cache
      - run: *yarn
      - save-cache: *save-yarn-cache
 
      - run:
          name: Run unit tests
          command: yarn test
 
      - persist_to_workspace:
          root: ~/project
          paths:
            - node_modules
      - store_test_results:
          path: ~/project/junit.xml
 
  android:
    working_directory: ~/project
 
    docker:
      - image: circleci/android:api-27-node8-alpha
 
    steps:
      - checkout:
          path: ~/project
      - attach_workspace:
          at: ~/project
 
      - restore-cache: *restore-fastlane
      - run: *install-fastlane-android
      - save-cache: *save-fastlane
 
      - run:
          name: version patch
          command: npm version patch
       
      - run:
          name: Build and Deploy
          command: |
            cd android
            bundle exec fastlane beta_circleci
 
  ios:
    macos:
      xcode: "9.0"
    working_directory: ~/project
    environment:
      FL_OUTPUT_DIR: ~/project/output
    shell: /bin/bash --login -o pipefail
    steps:
      - checkout:
          path: ~/project
      # Not using a workspace here as Node and Yarn versions
      # differ between the macOS image and the Docker containers above.
      - restore-cache: *restore-react-native-cli
      - run: *install-react-native-cli
      - save-cache: *save-react-native-cli
 
      - restore-cache: *restore-fastlane
      - run: *install-fastlane-ios
      - save-cache: *save-fastlane
 
      - restore-cache: *restore-yarn-cache
      - run: *yarn
      - save-cache: *save-yarn-cache
 
      - restore-cache: *restore-gem-ios
      - run: *install-gem-ios
      - save-cache: *save-gem-ios
 
      - restore-cache: *restore-cocoapods
      - run: *install-cocoapods
      - save-cache: *save-cocoapods
 
      - run:
          name: version patch
          command: npm version patch
 
      - run:
          name: Create a main.jsbundle
          command: node ./node_modules/react-native-cli/index.js bundle --dev false --platform ios --entry-file ./index.ios.js --bundle-output ./ios/main.jsbundle
 
      - run:
          name: Build and Signing
          command: |
            cd ios
            bundle exec fastlane beta_circleci
 
workflows:
  version: 2
  node-android-ios:
    jobs:
      - build:
          filters:
            branches:
              only:
                - develop
      - android:
          requires:
            - build
          filters:
            branches:
              only:
                - develop
      - ios:
          requires:
            - build
          filters:
            branches:
              only:
                - develop