variables:
  DEBUG: "1"
  CI_DEBUG_TRACE: "true"
  GIT_CURL_VERBOSE: "1"
  GIT_DEBUG_LOOKUP: "1"
  GIT_TRACE: "1"
  GIT_TRACE_PACKET: "1"
  GIT_TRANSLOOP_DEBUG: "1"
  GIT_TRANSPORT_HELPER_DEBUG: "1"

  # https://docs.gitlab.com/ce/ci/git_submodules.html
  GIT_SUBMODULE_STRATEGY: recursive