Hi,
I'll read the rest later, but I just wanted to say one thing before leaving
the house.

On 28 Jan 2015 05:30, "Thierry Volpiatto" <thierry.volpiatto@gmail.com>
wrote:
> diff --git a/lisp/emacs-lisp/package.el b/lisp/emacs-lisp/package.el
> index 88fc950..df3a108 100644
> --- a/lisp/emacs-lisp/package.el
> +++ b/lisp/emacs-lisp/package.el
> @@ -333,6 +333,15 @@ contents of the archive."
>    :group 'package
>    :version "24.4")
>
> +(defcustom packages-installed-directly nil
> +  "Store here packages installed explicitely by user.
> +This variable will be feeded automaticaly by emacs,
> +so you should not modify it yourself.

Then don't make it a defcustom :-). `customize-save-variable' will work on
any variable (even unbound ones), so a defvar is enough here.