.gitlab-ci.yml

image: google/cloud-sdk:alpine

deploy_in_appengine:
  stage: deploy
  environment:
    name: production
  only:
    - develop
  script:
    - echo $SERVICE_ACCOUNT > /tmp/$SERVICE_ACCOUNT_KEY.json
    - gcloud auth activate-service-account --key-file /tmp/$SERVICE_ACCOUNT_KEY.json

    # update and install yarn
    - apk update && apk add yarn nodejs npm
    
    # workaround for Error: could not get uid/gid 
    - npm config set unsafe-perm true

    # populate app.yaml file from app.template.yaml and env variables defined in gitlab CI/CD
    - npx gae-ayaml-env

    # install dependencies from package.json
    - yarn install

    # build a production build
    - NODE_ENV=production yarn build
    
    # deploy in app engine
    - gcloud --quiet --project=$PROJECT_ID app deploy app.yaml
  
after_script:
  - rm -f /tmp/$SERVICE_ACCOUNT_KEY.json