.gitlab-ci.yml

stages:
  - release
  - build

docker-build:
  image: docker:latest
  stage: build
  services:
    - docker:dind
  before_script:
    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
  # Default branch leaves tag empty (= latest tag)
  # All other branches are tagged with the escaped branch name (commit ref slug)
  script:
    - |
      if [[ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]]; then
        tag=""
        echo "Running on default branch '$CI_DEFAULT_BRANCH': tag = 'latest'"
      else
        tag=":$CI_COMMIT_REF_SLUG"
        echo "Running on branch '$CI_COMMIT_BRANCH': tag = $tag"
      fi
    - docker build --pull -t "$CI_REGISTRY_IMAGE${tag}" .
    - docker push "$CI_REGISTRY_IMAGE${tag}"
  # Run this job in a branch where a Dockerfile exists
  rules:
    - if: $CI_COMMIT_BRANCH
      exists:
        - Dockerfile

release:
  stage: release
  image: docker:stable
  services:
    - docker:dind

  variables:
    DOCKER_REGISTRY: $CI_REGISTRY
    DOCKER_USERNAME: $CI_REGISTRY_USER
    DOCKER_PASSWORD: $CI_REGISTRY_PASSWORD
    GITLAB_TOKEN: $GITLAB_TOKEN
    GIT_DEPTH: 0

  only:
    refs:
      - tags

  script: |
    docker run --rm --privileged \
      -v $PWD:/go/src/gitlab.com/goreleaser/example \
      -w /go/src/gitlab.com/goreleaser/example \
      -v /var/run/docker.sock:/var/run/docker.sock \
      -e DOCKER_USERNAME -e DOCKER_PASSWORD -e DOCKER_REGISTRY  \
      -e GITLAB_TOKEN \
      goreleaser/goreleaser release --clean