.gitlab-ci.yml

# Custom made CI CD setup file
# For more information, see: https://docs.gitlab.com/ee/ci/yaml/index.html#stages

# Workflow rules to trigger CI only when pushed via a tag/MR/to Main
workflow:
  rules:
    - if: $CI_MERGE_REQUEST_IID
    - if: $CI_COMMIT_TAG
    # DEFAULT BRANCH == main
    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH


# Variables for container registry
variables:
  DOCKER_REGISTRY_USER: $DOCKER_REGISTRY_USER
  DOCKER_REGISTRY_PASSWORD: $DOCKER_REGISTRY_PASSWORD
  DOCKER_HOST: tcp://docker:2375/
  DOCKER_DRIVER: overlay2

# Dind service for docker
services:
  - docker:19.03.13-dind


# List stages for jobs, and their order of execution
stages:          
  - build
  - staging
  - deploy


# This runs to tag containers by upping them once
build-job:
  # Building on docker image
  image: docker/compose:latest       
  stage: build

  # Running before script to print env vars for debugging
  before_script:
    - docker info

  # Run docker-compose
  script:
    - echo "Compiling the code in containers..."
    # Touching env files ignored for the gitlab runner 
    - touch config/mongo.env
    - touch config/mongo-express.env
    - touch config/mongo-express2.env
    - touch config/DB_ADMIN_CONFIG.env
    - docker-compose -f docker-compose.prod.yaml build


# This pushes the tagged containers to their registry
stage-job:
    # Building on docker image
    image: docker/compose:latest
    # Stage images to push
    stage: staging
    
    # Use containers built by build-job
    dependencies:
      - build-job

    # Login to dockerhub and push
    script:
    # Touching env files ignored for the gitlab runner
    - touch config/mongo.env
    - touch config/mongo-express.env
    - touch config/mongo-express2.env
    - touch config/DB_ADMIN_CONFIG.env
    # Push to registry
    - docker-compose -f docker-compose.prod.yaml build
    - echo "Pushing Docker Images to Registry..."
    - docker login -u $DOCKER_REGISTRY_USERNAME -p $DOCKER_REGISTRY_PASSWORD
    - docker-compose -f docker-compose.prod.yaml push


# This would pull code from hosted repo into server directly
deploy-job:    
  stage: deploy  # It only runs when *both* jobs in the test stage complete successfully.
  
  # No way currently to SSH into DVM repo
  script:
    - echo "Deploying application..."
    - echo "No way to deploy currently"