Travis CI File

.travis.yml

install:
  - yarn install

cache:
  yarn: true

stages:
  - Test
  - name: Build
    if: (branch != master) AND (branch != dev)
  - name: Deploy
    if: (type = pull_request) OR (branch IN (dev, master))

jobs:
  include:
    - stage: Test
      os: linux
      dist: trusty
      before_install:
        - nvm install 9.5.0
      script:
        - yarn lint
        - yarn test

    - stage: Build
      os: linux
      dist: trusty
      language: android
      gemfile: Gemfile
      android:
        components:
          - build-tools-27.0.3
          - android-27
          - extra-android-m2repository
          - extra-google-google_play_services
          - extra-google-m2repository
          - addon-google_apis-google-16
      before_install:
        - bundler install --jobs=3 --retry=3
        - nvm install 9.5.0
      script:
        - bundler exec fastlane android build 

    - stage: Deploy
      os: linux
      dist: trusty
      language: android
      gemfile: Gemfile
      android:
        components:
          - build-tools-27.0.3
          - android-27
          - extra-android-m2repository
          - extra-google-google_play_services
          - extra-google-m2repository
          - addon-google_apis-google-16
      before_install:
        - bundler install --jobs=3 --retry=3
        - nvm install 9.5.0
      script:
        - bundler exec fastlane android deploy 
        
    - stage: Build
      os: osx
      osx_image: xcode9.2
      language: objective-c
      gemfile: Gemfile
      rvm:
        - 2.4.2
      before_install:
        - brew install yarn
        - bundler install --jobs=3 --retry=3
      script:
        - bundler exec fastlane ios build  

    - stage: Deploy
      os: osx
      osx_image: xcode9.2
      language: objective-c
      gemfile: Gemfile
      rvm:
        - 2.4.2
      before_install:
        - brew install yarn
        - bundler install --jobs=3 --retry=3
      script:
        - bundler exec fastlane ios deploy  

notifications:
  slack:
    rooms:
      - INSERT YOUR SLACK API KEY HERE

This assumes you are using bundler to install Fastlane, which you should.