#!/bin/sh

. scripts/utils.sh

# Exit early if we don't want to build the image
if [ "${BUILD_ASSETS_IMAGE}" != "true" ]
then
  exit 0
fi

get_repository_id() {
  repository_name="${1}"
  repositories_url="${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories"

  curl --header "PRIVATE-TOKEN: ${PROJECT_TOKEN_FOR_CI_SCRIPTS_API_USAGE}" "${repositories_url}" | jq "map(select(.name == \"${repository_name}\")) | .[0].id"
}

# Generate the image name based on the project this is being run in
ASSETS_IMAGE_NAME="gitlab-assets-ce"

# `dev.gitlab-org` still has gitlab-ee.
if [ "${CI_PROJECT_NAME}" = "gitlab" ] || [ "${CI_PROJECT_NAME}" = "gitlab-ee" ]
then
  ASSETS_IMAGE_NAME="gitlab-assets-ee"
fi

ASSETS_IMAGE_PATH="${CI_REGISTRY}/${CI_PROJECT_PATH}/${ASSETS_IMAGE_NAME}"
COMMIT_ASSETS_HASH_TAG="$(assets_image_tag)"
COMMIT_ASSETS_HASH_DESTINATION="${ASSETS_IMAGE_PATH}:${COMMIT_ASSETS_HASH_TAG}"

DESTINATIONS="--destination=${COMMIT_ASSETS_HASH_DESTINATION}"

# Also tag the image with GitLab version, if running on a tag pipeline, so
# other projects can simply use that instead of computing the slug.
if [ -n "${CI_COMMIT_TAG}" ]; then
  COMMIT_REF_NAME_DESTINATION="${ASSETS_IMAGE_PATH}:${CI_COMMIT_REF_NAME}"
  DESTINATIONS="$DESTINATIONS --destination=$COMMIT_REF_NAME_DESTINATION"
else
  if [ -n "${PROJECT_TOKEN_FOR_CI_SCRIPTS_API_USAGE}" ]; then
    echoinfo "Checking if the ${COMMIT_ASSETS_HASH_DESTINATION} image exists..."
    repository_id=$(get_repository_id "${ASSETS_IMAGE_NAME}")

    if [ -n "${repository_id}" ]; then
      api_image_url="${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories/${repository_id}/tags/${COMMIT_ASSETS_HASH_TAG}"
      echoinfo "api_image_url: ${api_image_url}"

      if test_url "${api_image_url}" "--header \"PRIVATE-TOKEN: ${PROJECT_TOKEN_FOR_CI_SCRIPTS_API_USAGE}\""; then
        echosuccess "Image ${COMMIT_ASSETS_HASH_DESTINATION} already exists, no need to rebuild it."
        exit 0
      else
        echoinfo "Image ${COMMIT_ASSETS_HASH_DESTINATION} doesn't exist, we'll need to build it."
      fi
    else
      echoerr "Repository ID couldn't be found for the '${ASSETS_IMAGE_NAME}' image!"
    fi
  else
    echoinfo "The 'PROJECT_TOKEN_FOR_CI_SCRIPTS_API_USAGE' variable is not present, so we cannot check if the image already exists."
  fi
fi

mkdir -p assets_container.build/public
cp -r public/assets assets_container.build/public/
cp Dockerfile.assets assets_container.build/

echo "Building assets image for destinations: ${DESTINATIONS}"

/kaniko/executor \
  --context="assets_container.build" \
  --dockerfile="assets_container.build/Dockerfile.assets" \
  ${DESTINATIONS}