DinD pipeline to build & test phoenix applications

gitlab phoenix build & test pipeline

image: docker:latest

variables:
  PWD: $(pwd)
  BUILD_BOX: webdeb/phx-dev
  DATA_BOX: build_data_$CI_PROJECT_ID_$CI_BUILD_REF

stages:
  - build
  - test
  - cleanup

build:
  stage: build
  before_script:
    - docker create --name $DATA_BOX -v /opt/app busybox
    - docker cp . $DATA_BOX:/opt/app
  script:
    - docker run --rm -t --volumes-from $DATA_BOX
      $BUILD_BOX
        sh -c "yarn && mix do deps.get, deps.compile"

test:
  stage: test
  variables:
    DATABASE_URL: ecto://postgres:postgres@postgres/karta_test
  services:
    - postgres:9.6
  script:
    - docker run --rm -t
      --volumes-from build-data
      --link $POSTGRES_NAME:postgres
      -e DATABASE_URL=$DATABASE_URL
      $BUILD_BOX
        sh -c "mix ecto.create && mix ecto.migrate && mix test"

# Always cleaning up
cleanup_job:
  tags:
    - docker
  stage: cleanup
  script:
    - docker rm $DATA_BOX
  when: always