message: appveyor: only get shallow submodules
diff: @@ -28,7 +28,7 @@ clone_folder: C:\dronecore
  # scripts to run before build
  before_build:
  - cd C:\dronecore
  - - git submodule update --init --recursive
  + - git submodule update --init --recursive --depth 1
  - cd C:\
  - appveyor DownloadFile https://curl.haxx.se/download/curl-7.55.1.zip
  - 7z x -y curl-7.55.1.zip
  