.gitlab-ci.yml

variables:
  # Image name and 'release'-tag to build
  IMAGE_NAME: my-image-name
  RELEASE_TAG: stable
  
  # We could also use the Git-Hash here using $CI_COMMIT_SHORT_SHA
  BUILD_TAG: latest

  # We will use this image to build our container
  BUILD_IMAGE: myname/toolbox:v1

stages:
  - build
  - test
  - release

# build/push image using buildah and $BUILD_TAG
build:
  image: ${BUILD_IMAGE}
  stage: build
  script:
    - buildah bud --pull -t "${REGISTRY}/${IMAGE_NAME}:${BUILD_TAG}" .
    - buildah push  --creds "${REGISTRY_USER}:${REGISTRY_PASS}" "${REGISTRY}/${IMAGE_NAME}:${BUILD_TAG}"

# Use built image for poor man's testing
test:
  image: "${REGISTRY}/${IMAGE_NAME}:${BUILD_TAG}"
  stage: test
  script:
    - echo "I'm alive!"

# Retag image from BUILD_TAG to RELEASE_TAG on master-branch only
release:
  image: ${BUILD_IMAGE}
  stage: release
  script:
    - skopeo copy --screds "${REGISTRY_USER}:${REGISTRY_PASS}" --dcreds "${REGISTRY_USER}:${REGISTRY_PASS}" "docker://${REGISTRY}/${IMAGE_NAME}:${BUILD_TAG}" "docker://${REGISTRY}/${IMAGE_NAME}:${RELEASE_TAG}"
  only:
    - master