.gitlab-ci.yml

# Build using the previous version
image: theyorkshiredev/docker-slim:latest

# Since we building docker images within a docker container we need the
# docker in docker service.
services:
  - docker:dind

stages:
  - build
  - test
  - publish
  - release

# Log in to Gitlab's docker registry
before_script:
  - export COMMIT_IMAGE=$( echo $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_SHA | tr '[:upper:]' '[:lower:]' )
  - export TAGGED_IMAGE=$( echo $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_TAG | tr '[:upper:]' '[:lower:]' )
  - export GITHUB_URL=https://TheYorkshireDev:${GITHUB_TOKEN}@github.com/TheYorkshireDev/docker-slim.git
  - export RELEASE_URL=https://registry.hub.docker.com/u/theyorkshiredev/docker-slim/trigger/$DOCKERHUB_TOKEN/

# Group Docker login commands
.log_into_docker : &log_into_docker |
  docker info
  docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY

# Build our docker image and push to Gitlab's registry
build:
  stage: build
  script:
    - *log_into_docker
    - docker build --pull -t $COMMIT_IMAGE .
    - docker push $COMMIT_IMAGE

# Test our docker image and verify that the container runs and anything supposed to be installed is
test_installed_apps:
  stage: test
  script:
    - *log_into_docker
    - docker pull $COMMIT_IMAGE
    - docker run -i $COMMIT_IMAGE /bin/sh -c 'docker --version'

# Lint our Dockerfile
lint_dockerfile:
  image: theyorkshiredev/dockerfile-linter:latest
  stage: test
  script:
    - dockerfilelint Dockerfile

# If the build is on master mirror on GitHub
github_publish:
  image: theyorkshiredev/git-container:latest
  stage: publish
  script:
    - echo "Publish to Github."
    - git remote add github "$GITHUB_URL"
    - git push github master --follow-tags
  only:
    - master

# If the build has a tag, then use it to tag the docker image
publish:
  stage: publish
  script:
    - *log_into_docker
    - docker pull $COMMIT_IMAGE
    - docker tag $COMMIT_IMAGE $TAGGED_IMAGE
    - docker push $TAGGED_IMAGE
  only:
    - tags

# If the publish to github completed, release the image on dockerhub
dockerhub_release:
  image: theyorkshiredev/trigger-dockerhub-build:latest
  stage: release
  script:
    - echo "Release to Dockerhub."
    - release $CI_COMMIT_TAG $RELEASE_URL
  only:
    - tags
  dependencies:
    - github_publish