image:
  name: docker:dind

stages:
  - build
  - deploy

variables:
  DEPLOYMENT_MANIFEST_PATH: ./kubernetes.manifest.yaml
  DOCKER_DRIVER: overlay

# this command will be run before every script
default:
  before_script:
    - export VERSION=v`date +%Y%m%d`-`echo "$CI_COMMIT_SHA" | head -c7`
    - export CI_REGISTRY_FULL_IMAGE="$CI_REGISTRY_IMAGE:$VERSION"

build:
  stage: build
  script:
    - apk update
    - echo "TAG=$VERSION" >> variables.env             # and append to the variables.env file
    - docker login -u gitlab-ci-token -p "${CI_JOB_TOKEN}" "${CI_REGISTRY}"
    - docker build -t $CI_REGISTRY_IMAGE:$VERSION -t $CI_REGISTRY_IMAGE:latest .
    - docker push $CI_REGISTRY_IMAGE:$VERSION
    - docker push $CI_REGISTRY_IMAGE:latest
  rules:
    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
  artifacts:
    reports:
      dotenv: variables.env

deploy_production:
  stage: deploy
  image: alpine/k8s:1.20.7
  needs:
    - job: build
      artifacts: true
  script:
    - echo "Deploy to production"
    - apk update && apk add gettext
    - envsubst < $DEPLOYMENT_MANIFEST_PATH
    - envsubst < $DEPLOYMENT_MANIFEST_PATH | kubectl -s $K8S_SERVER --token $K8S_TOKEN apply -f -
  variables:
    ENVIRONMENT: tools
  environment:
    name: tools
  rules:
    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH