.gitlab.ci.yml file for React-Native

.gitlab.ci.yml (react-native)

image: openjdk:8-jdk #Defining the Docker Image

variables:
  ANDROID_COMPILE_SDK: "28" #set compile SDK version
  ANDROID_BUILD_TOOLS: "28.0.2" #set build tool version
  ANDROID_SDK_TOOLS:   "4333796" #set SDK tool build number you can find yous here https://developer.android.com/studio/releases/sdk-tools

before_script:
  # Fetch the specified SDK tools version to build with
      - wget --quiet --output-document=/tmp/sdk-tools-linux.zip https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_TOOLS}.zip
      - unzip /tmp/sdk-tools-linux.zip -d .android

      # Set up environment variables
      - export ANDROID_HOME=$PWD/.android
      - export PATH=$PATH:$PWD/.android/platform-tools/

      # Install platform tools and Android SDK for the compile target
      - echo y | .android/tools/bin/sdkmanager "platforms;android-${ANDROID_COMPILE_SDK}"


      - curl -sL https://deb.nodesource.com/setup_10.x | bash #Add Node Repo
      - apt-get install -y nodejs #Install NOde JS
      - npm install -g react-native-cli #Install React-Native CLI
      - npm install #Install npm packages
      - react-native link #Link the resources
      - chmod +x android/gradlew #Provide permission for execution

# Define stages 
stages:
  - build_release_android

build_release_android:
  stage: build_release_android
  script:
    - mkdir /PlayJson #make temp directory named PlayJson in root of project
    - "echo $PLAY_STORE_JSON > /PlayJson/play-store-key.json" # copy git variable value to play-store-key.json file
    - npm run android-bundle # bundle the app (Execute from package.json's script block)
    - npm run android-release #create release app (Execute from package.json's script block)
    - cd android && ./gradlew publishApkRelease  # navigate to android dir & publish app on play store
  only:
    - master #set trigger for CICD if push or merge in master branch
  artifacts:
    paths:
    - ./android/app/build/outputs/  # set artifact path which store your APK file

@usama-asfar ooh I see.
I think you are working with jenkin or circle CI but not gitlab ci :D