.gitlab-ci.yml

image: docker:latest

variables:
  DOCKER_DRIVER: overlay2
  TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
  RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
  GIT_SUBMODULE_STRATEGY: recursive

services:
  - docker:dind

stages:
  - build
  - release
  - deploy

build:
  stage: build
  tags:
    - dind
  script:
    - docker login -u gitlab-ci-token -p "$CI_JOB_TOKEN" "$CI_REGISTRY"
    - docker build --pull -t "$TEST_IMAGE" .
    - docker push "$TEST_IMAGE"

release:
  stage: release
  tags:
    - dind
  script:
    - docker login -u gitlab-ci-token -p "$CI_JOB_TOKEN" "$CI_REGISTRY"
    - docker pull "$TEST_IMAGE"
    - docker tag "$TEST_IMAGE" "$RELEASE_IMAGE"
    - docker push "$RELEASE_IMAGE"
  only:
    - master

dockerhub:on-schedule:
  stage: deploy
  only:
    - schedules
  image: alpine:latest
  script:
    - apk add --update curl
    - 'curl -X POST -H "Content-Type: application/json" --data "{ \"build\": true }" https://cloud.docker.com/api/build/v1/source/$dockerhub_project_trigger_token/trigger/$dockerhub_trigger_token/call/'