[bug#57963] [PATCH v5 2/2] home: services: Support user's fontconfig configuration.

[Declan Tsien]

Taiju HIGASHI <higashi@taiju.info> writes:

> See: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=57963#71
>
> We have to come up with a merge strategy if we allow to extend, how
> would you like to extend it?

OK, got it. Sounds reasonable. 
I should have followed the conversation thoroughly,  Sorry about that.

>
> Perhaps I am less experienced in Guix customization than you are, and

Nah, I haven't contributed much to Guix community yet. Only poking around with 
my
guix-config ha.

> don't understand the use cases that cannot be achieved with
> modify-services.

I'd prefer =simple-service= over =modify-services= when possible.
For example, in this case. Let's say I want to add an item to
=font-directories=, I should not forget to include =guix-home-font-dir=
too, like this:

#+begin_src scheme
(home-fontconfig-configuration
 (font-directories
  (string-list (list guix-home-font-dir "another-dir")))
#+end_src

But with service extension I can just write:

#+begin_src scheme
(home-fontconfig-extension
 (font-directories
  (string-list (list "another-dir")))
#+end_src

=guix-home-font-dir= doesn't need to show up in my configuration.

----
Thanks

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