.gitlab-ci.yml

image: docker

services:
  - docker:dind

stages:
  - build
  - build-release
  - deploy

build-release: #This will be executed if you oush on master, it makes a new release (latest) image
  stage: build
  only:
    - master
  script:
    - echo "building for branch $CI_COMMIT_REF_NAME"
    - sudo docker image prune -f #Delete old unused images
    - sudo docker build -t gitlab.jonasled.de/jonasled/url_shorter_docker . #Build the image with the name already set to push
    - sudo docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY #Login to docker registry, username and password will be filled while executing
    - sudo docker push gitlab.jonasled.de/jonasled/url_shorter_docker #Push the image onto the Docker registry.

build: #This will be executed on every push. With this script the beta image will be build
  stage: build
  script:
    - echo "building for branch $CI_COMMIT_REF_NAME"
    - sudo docker image prune -f #Delete old unused images
    - sudo docker build -t gitlab.jonasled.de/jonasled/url_shorter_docker:beta . #Build the image with the name already set to push
    - sudo docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY #Login to docker registry, username and password will be filled while executing
    - sudo docker push gitlab.jonasled.de/jonasled/url_shorter_docker:beta #Push the image onto the Docker registry.

deploy:
  stage: deploy
  only:
    - master
  script:
    - sudo apt-get install -y python-pip #install pip, this is needed to install docker-compose in the next step
    - sudo pip install docker-compose #Install docker-compose with pip
    - replace "5000:5000" "5003:5000" -- docker-compose.yml #replace in docker-compose some settings. Variables will be replaced on execute.
    - replace "domains=" "$domains" -- docker-compose.yml #The domains I use for my url shorter
    - replace "recaptcha_private=" "$recaptcha_private" -- docker-compose.yml #Recaptcha keys for protecting the create form from attacks
    - replace "recaptcha_public=" "$recaptcha_public" -- docker-compose.yml
    - sudo docker-compose up -d #Start the new container
  environment: master