From: <znavko@tutanota.com>
To: Ricardo Wurmus <rekado@elephly.net>
Cc: Help Guix <help-guix@gnu.org>
Subject: Re: Deleting unnecessary services from %desktop-services
Date: Sat, 1 Dec 2018 06:06:59 +0100 (CET) [thread overview]
Message-ID: <LSc9OWx--3-1@tutanota.com> (raw)
In-Reply-To: <87efb32s1f.fsf@elephly.net>
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Hello, Ricardo Wurmus! ok, thank you. But now I've not achieved what I need. avahi-damon, ntpd, networking rest in my system.
(services (cons* ;;(tor-service)
(service postgresql-service-type)
(xfce-desktop-service)
(modify-services
(remove (lambda (service)
(eq? (service-kind service)
avahi-service-type ntp-service-type networking))
%desktop-services
);end of remove
(elogind-service-type
c => (elogind-configuration (handle-lid-switch 'ignore)))
);;end of modify desktop-services
));;end of services
Also they are mentioned in use-modules:
(use-modules (gnu) (gnu system nss)
(gnu services desktop)
(srfi srfi-1) ;;for remove function
(gnu services networking) ;;for remove ntp
(gnu services avahi) ;;for remove avahi
(gnu services xorg)
(gnu services databases);;for postgres
)
(use-service-modules desktop)
(use-package-modules certs gnome)
But if I delete this use-modules lines, remove line will give the errors: unbound variable avahi-service-type, ntp-service-type, networking.
So, how to correct I do not know.
Nov 30, 2018, 5:55 AM by rekado@elephly.net <mailto:rekado@elephly.net>:
>
> znavko@tutanota.com <mailto:znavko@tutanota.com>> writes:
>
>> Guile Manual says 'remove' returns elements. But I need to remove elements.
>>
>
> “remove” does what you want. The “services” field expects a list of
> services. When using “remove” on a list of services it returns a new
> list of (possibly fewer) services. That’s exactly what you want.
>
> “remove!”, on the other hand, mutates an existing value; you would need
> to have it operate on an existing variable to mutate it. “remove” is
> much more elegant.
>
> --
> Ricardo
>
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next prev parent reply other threads:[~2018-12-01 5:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 19:38 Deleting unnecessary services from %desktop-services znavko
2018-11-27 22:46 ` Pierre Neidhardt
2018-11-29 7:09 ` znavko
2018-11-30 2:55 ` Ricardo Wurmus
2018-12-01 5:06 ` znavko [this message]
2018-12-01 13:47 ` Joshua Branson
2018-12-01 15:28 ` znavko
2018-12-01 20:07 ` Ricardo Wurmus
2018-12-02 16:09 ` znavko
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