Re: little problem (avoid automatic creation directory .emacs.d)

What about this setup? (I'm not absolutely sure it is correct)
1. Download the emacs distro and unpack it somewhere. Let call this 
directory <emacs>.

2. Create the <emacs>\home folder.

3. Create the <emacs>\share\emacs\site-lisp\site-start.el with this 
content on the first line:
(setenv "HOME" (concat (expand-file-name (concat (file-name-directory 
load-file-name) "../../..")) "/home"))

4. Now your .emacs.d directory will be under <emacs>\home. And every 
package you install, etc., will be ready for backup. What do you think 
about this?

Dňa 25. 11. 2015 o 16:16 pigreco erre napísal(a):
> Dear all,
> I am a newbie Emacs user.
> I try to install my super editor :-) into USB and I use the 24.5 version.
> To complete the procedure I customize its behaviour.  I write the
> following code :
>
> "(defvar usb-drive-letter (substring data-directory 0 3))
> (defvar usb-home-dir (concat usb-drive-letter "home/"))
> (setenv "HOME" usb-home-dir)"
>
> in site-start.el which is included in...share\..\site-lisp and I add in
> my \home directory , \.emacs.d\init.el file.
> The little problem is that:
> when I use the editor in windows 7, it  creates also the folder
> \.emacs.d\  within ..\AppData\Roaming\
> but this path is not used (obviously because root is my usb home and the
> config/user folder is found)
> Otherwise when I just run Emacs under windows XP I received in
> buffer-window a message:
> "warning (inizialization): unable to create 'user-emacs-directory'
> (~/.emacs.d/) ...." .
> Just later the editor continue in correct mode with the exact init file.
> I suppose that it have a default directory value (AppData\roaming) which
> is not found at the start process (initialization phase).
> As a consequence the editor writes the warning in buffer. After it
> overwrites the folder in my $HOME$ that it just exists and it contains
> the configuration file.
> What can I do to stop the buffer-warning-message in win XP and to avoid
> the writing (useless) process in AppData\Roaming in win 7?
> I thank you to all in adavance for your precious help
> With my best regards
> Alessandro
>