default:
  image: node:latest

  # Validate that the repository contains a package.json and extract a few values from it.
  before_script:
    - |
      if [[ ! -f package.json ]]; then
        echo "No package.json found! A package.json file is required to publish a package to GitLab's NPM registry."
        echo 'For more information, see https://docs.gitlab.com/ee/user/packages/npm_registry/#creating-a-project'
        exit 1
      fi
    - NPM_PACKAGE_NAME=$(node -p "require('./package.json').name")
    - NPM_PACKAGE_VERSION=$(node -p "require('./package.json').version")

# Validate that the package name is properly scoped to the project's root namespace.
# For more information, see https://docs.gitlab.com/ee/user/packages/npm_registry/#package-naming-convention
validate_package_scope:
  stage: build
  script:
    - |
      if [[ ! $NPM_PACKAGE_NAME =~ ^@$CI_PROJECT_ROOT_NAMESPACE/ ]]; then
        echo "Invalid package scope! Packages must be scoped in the root namespace of the project, e.g. \"@${CI_PROJECT_ROOT_NAMESPACE}/${CI_PROJECT_NAME}\""
        echo 'For more information, see https://docs.gitlab.com/ee/user/packages/npm_registry/#package-naming-convention'
        exit 1
      fi

# If no .npmrc if included in the repo, generate a temporary one to use during the publish step
# that is configured to publish to GitLab's NPM registry
create_npmrc:
  stage: build
  script:
    - |
      if [[ ! -f .npmrc ]]; then
        echo 'No .npmrc found! Creating one now. Please review the following link for more information: https://docs.gitlab.com/ee/user/packages/npm_registry/index.html#authenticating-with-a-ci-job-token'

        {
          echo '@${CI_PROJECT_ROOT_NAMESPACE}:registry=${CI_SERVER_PROTOCOL}://${CI_SERVER_HOST}:${CI_SERVER_PORT}/api/v4/projects/${CI_PROJECT_ID}/packages/npm/'
          echo '//${CI_SERVER_HOST}:${CI_SERVER_PORT}/api/v4/packages/npm/:_authToken=${CI_JOB_TOKEN}'
          echo '//${CI_SERVER_HOST}:${CI_SERVER_PORT}/api/v4/projects/${CI_PROJECT_ID}/packages/npm/:_authToken=${CI_JOB_TOKEN}'
        } >> .npmrc

      fi
  artifacts:
    paths:
      - .npmrc

# Publish the package. If the version in package.json has not yet been published, it will be
# published to GitLab's NPM registry. If the version already exists, the publish command
# will fail and the existing package will not be updated.
publish_package:
  stage: deploy
  script:
    - |
      {
        npm publish &&
        echo "Successfully published version ${NPM_PACKAGE_VERSION} of ${NPM_PACKAGE_NAME} to GitLab's NPM registry: ${CI_PROJECT_URL}/-/packages"
      } || {
        echo "No new version of ${NPM_PACKAGE_NAME} published. This is most likely because version ${NPM_PACKAGE_VERSION} already exists in GitLab's NPM registry."
      }