Installation failures when using quelpa

[malcolmpurvis]

This isn't bug per-se but I thought that I should document this in case someone else is impacted by it.

Installing recent versions of combobulate with quelpa can fail with the following error:

fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
fatal: clone of '[email protected]:mickeynp/html-ts-mode.git' into submodule path '~/.emacs.d/quelpa/build/combobulate/tests/html-ts-mode' failed

This is because quelpa will clone the combobulate repo and its submodules as part of the install process and the submodule is referenced with a git URI. If the host machine is not configured for GitHub access the install will fail.

The solution is to use the vc support in package.el which doesn't check out submodules:

(use-package combobulate
  :vc ( :url "https://github.com/mickeynp/combobulate"
    :rev :newest)

No changes to combobulate are required.