# FROM https://gitlab.cern.ch/ci-tools/container-image-ci-templates/

# Defining the variables which can be overridden while using the template file in .gitlab-ci.yml
# REGISTRY_IMAGE_PATH: Defines where the image should be pushed to.
# CONTEXT_DIR: Defines the context dir for the image build
# DOCKER_FILE_NAME: Defines the name of the Dockerfile
# PUSH_IMAGE: If the gitlab step should push the built image
# BUILD_ARGS: The build-time variables

variables:
  CONTEXT_DIR: ""
  DOCKER_FILE_NAME: "Dockerfile"
  GIT_SUBMODULE_STRATEGY: recursive
  PUSH_IMAGE: "false"
  BUILD_ARGS: ""

.kaniko_build:
  stage: build
  tags:
    - docker
  image:
    # Using the official kaniko v1.6 image for the builds
    name: gcr.io/kaniko-project/executor:v1.6.0-debug
    entrypoint: [""]
  script:
    - |
      if [ -z "${REGISTRY_IMAGE_PATH}" ]; then
        echo "ERROR: CI variable REGISTRY_IMAGE_PATH is mandatory."
        exit 1
      fi
    - REGISTRY=$(echo ${REGISTRY_IMAGE_PATH} | cut -d / -f 1)
    - >
      if [ -z "${CONTEXT_DIR}" ]; then
        KANIKO_CONTEXT_DIR=${CI_PROJECT_DIR}
      else
        KANIKO_CONTEXT_DIR=${CI_PROJECT_DIR}/${CONTEXT_DIR}
      fi
    - mkdir -p /kaniko/.docker
    - |
      if [ -z "$DOCKER_AUTH_CONFIG" ]; then
        # build the DOCKER_AUTH_CONFIG from user parameters as per https://docs.gitlab.com/ee/ci/docker/using_kaniko.html and internal docs
        echo "{\"auths\":{\"${HARBOR_HOST}\":{\"auth\":\"$(printf "%s:%s" "${HARBOR_USERNAME}" "${HARBOR_PASSWORD}" | base64 | tr -d '\n')\"}}}" > /kaniko/.docker/config.json
      else
        echo "${DOCKER_AUTH_CONFIG}" > /kaniko/.docker/config.json
      fi
    # build and push the image to the path set in $REGISTRY_IMAGE_PATH variable.
    - |
      if [ "$(echo ${PUSH_IMAGE} | tr '[:upper:]' '[:lower:]')" = "true" ]; then
        PUSH_IMAGE=""
      else
        echo "Info: defer pushing image to remote as PUSH_IMAGE is false"
        PUSH_IMAGE="--no-push"
      fi
    - |
      if [ -n "$BUILD_ARGS" ]; then
        for arg in $BUILD_ARGS; do
          KANIKO_BUILD_ARGS="${KANIKO_BUILD_ARGS} --build-arg ${arg}"
        done
      fi
    - /kaniko/executor --context "${KANIKO_CONTEXT_DIR}" --dockerfile "${KANIKO_CONTEXT_DIR}/${DOCKER_FILE_NAME}" ${KANIKO_BUILD_ARGS} --destination "${REGISTRY_IMAGE_PATH}" "${PUSH_IMAGE}"