.gitlab-ci.yml

variables:
  HEROKU_APP_STAGING: staging-alpine-helloworld
  HEROKU_APP_PRODUCTION: prod-alpine-helloworld
  HEROKU_APP_REVIEW: review-alpine-helloworld
  STAGING_DOMAIN: https://staging-alpine-helloworld.herokuapp.com/
  PRODUCTION_DOMAIN: https://prod-alpine-helloworld.herokuapp.com/
  
image: docker:latest
services:
  - name: docker:dind
    alias: docker

stages:
  - Build image
  - Acceptance test
  - Release
  - Deploy review
  - Stop review
  - Deploy staging
  - Docker test staging
  - Deploy production
  - Docker test production

.deploy_template: &deploy
  image: alpine
  only:
    - master
  before_script:
    - apk add --no-cache --upgrade curl
  script:
    - curl $DOMAIN | grep -q "Hello world!"
    - if [ $? -eq 0 ]; then echo "Validation test succeed"; fi
  environment:
    name: $ENVIRONMENT_NAME/$CI_COMMIT_REF_NAME
    url: $DOMAIN

docker-build:
  stage: Build image
  script:
    - docker build -t alpine.hello-world .
    - docker save alpine.hello-world > alpine.hello-world.tar
  artifacts:
    paths:
      - alpine.hello-world.tar

docker-run:
  stage: Acceptance test
  before_script:
    - apk add --no-cache --upgrade curl
  script:
    - docker load < alpine.hello-world.tar
    - docker run -d -p 80:5000 -e PORT=5000 alpine.hello-world
    - sleep 5
    - curl "http://docker" | grep -q "Hello world!"
    - if [ $? -eq 0 ]; then echo "acceptance test succeed"; fi

docker-release:
  stage: Release
  before_script:
    - docker login registry.gitlab.com -u $USERNAME -p $TOKEN
  script:
    - docker load < alpine.hello-world.tar
    - docker tag alpine.hello-world $IMAGE:$CI_COMMIT_REF_NAME
    - docker tag alpine.hello-world $IMAGE:$CI_COMMIT_SHORT_SHA
    - docker push $IMAGE:$CI_COMMIT_REF_NAME
    - docker push $IMAGE:$CI_COMMIT_SHORT_SHA

docker-deploy.staging:
  stage: Deploy staging
  before_script:
    - apk add --update nodejs npm
    - npm install -g heroku
    - docker load < alpine.hello-world.tar
  script:
    - docker login --username=MozkaOps --password=$HEROKU_API_KEY registry.heroku.com
    - heroku create $HEROKU_APP_STAGING || echo "App already exists"
    - docker tag alpine.hello-world registry.heroku.com/$HEROKU_APP_STAGING/web
    - docker push registry.heroku.com/$HEROKU_APP_STAGING/web
    - heroku container:release web --app $HEROKU_APP_STAGING
  environment:
    name: staging/$CI_COMMIT_REF_NAME
    url: https://staging-alpine-helloworld.herokuapp.com/
  only:
    - master

docker-deploy.production:
  stage: Deploy production
  before_script:
    - apk add --update nodejs npm
    - npm install -g heroku
    - docker load < alpine.hello-world.tar
  script:
    - docker login --username=MozkaOps --password=$HEROKU_API_KEY registry.heroku.com
    - heroku create $HEROKU_APP_PRODUCTION || echo "App already exists"
    - docker tag alpine.hello-world registry.heroku.com/$HEROKU_APP_PRODUCTION/web
    - docker push registry.heroku.com/$HEROKU_APP_PRODUCTION/web
    - heroku container:release web --app $HEROKU_APP_PRODUCTION
  environment:
    name: production/$CI_COMMIT_REF_NAME
    url: https://prod-alpine-helloworld.herokuapp.com/
  only:
    - master

docker-review:
  stage: Deploy review
  before_script:
    - apk add --update nodejs npm
    - npm install -g heroku
  script:
    - heroku container:login
    - heroku create $HEROKU_APP_REVIEW || echo "App already exists"
    - heroku container:push web --app $HEROKU_APP_REVIEW
    - heroku container:release web --app $HEROKU_APP_REVIEW
  environment:
    name: review/$CI_COMMIT_REF_NAME
    url: https://$HEROKU_APP_REVIEW.herokuapp.com/
    on_stop: docker-cleanup
  only:
    - merge_requests

docker-cleanup:
  stage: Stop review
  before_script:
    - apk add --update nodejs npm
    - npm install -g heroku
  variables:
    GIT_STRATEGY: none
  script:
    - heroku container:rm web --app $HEROKU_APP_REVIEW
  when: manual
  environment:
    name: review/$CI_COMMIT_REF_NAME
    action: stop
  only:
    - merge_requests

docker-test-staging:
  <<: *deploy
  stage: Docker test staging
  variables:
    DOMAIN: $STAGING_DOMAIN
    ENVIRONMENT_NAME: staging

docker-test-production:
  <<: *deploy
  stage: Docker test production
  variables:
    DOMAIN: $PRODUCTION_DOMAIN
    ENVIRONMENT_NAME: production