From: Ricardo Wurmus <rekado@elephly.net>
To: ng0 <contact.ng0@cryptolab.net>
Cc: guix-devel@gnu.org, Maxim Cournoyer <maxim.cournoyer@gmail.com>
Subject: Re: It’s building!
Date: Sun, 22 Jan 2017 17:02:25 +0100 [thread overview]
Message-ID: <87d1ff13se.fsf@elephly.net> (raw)
In-Reply-To: <8760l7w88s.fsf@wasp.i-did-not-set--mail-host-address--so-tickle-me>
ng0 <contact.ng0@cryptolab.net> writes:
> For me it fails, I tried to adopt this to my
> %desktop-services-sans-ntpd but I haven't found the right way to
> make use of it:
>
> (define %desktop-services-sans-ntpd
> ;; List of services typically useful for a "desktop" use case.
> (cons* (slim-service)
> (screen-locker-service slock)
> (screen-locker-service xlockmore "xlock")
> (avahi-service)
> (wicd-service)
> (udisks-service)
> (upower-service)
> (colord-service)
> (geoclue-service)
> (polkit-service)
> (elogind-service)
> (dbus-service)
> (guix-service-type config =>
This isn’t going to work because you ripped this chunk from a
“modify-services” expression.
> Identation broken because this happens when you copy from emacs
> with X into terminal emacs.
You can use C-M-q to reindent an expression.
> Obviously this fails because "config" is not known.
That’s because you’re not doing this within “modify-services”.
> I'm open for ideas on how to erase ntp from the services in a
> better way, I'm running a replacement for ntpd.
You can use regular Scheme to filter lists, for example:
(filter (compose not (cut eq? 'ntp <>) service-type-name service-kind) %desktop-services)
This means: run through all elements of “%desktop-services”, extract the
service type (“service-kind”), extract the type name from the kind (“service-type-name”), check if it’s equal
to 'ntp (“(cut eq? 'ntp <>)”), then throw it out (“not”). The first
argument to “filter” is just a big function.
--
Ricardo
GPG: BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC
https://elephly.net
next prev parent reply other threads:[~2017-01-22 16:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-20 6:28 It’s building! Maxim Cournoyer
2017-01-22 13:10 ` ng0
2017-01-22 16:02 ` Ricardo Wurmus [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-01-12 16:10 Ludovic Courtès
2017-01-12 16:23 ` Kei Kebreau
2017-01-12 17:18 ` David Craven
2017-01-12 17:31 ` Alex Sassmannshausen
2017-01-15 22:32 ` Ludovic Courtès
2017-02-01 2:47 ` myglc2
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