432 lines
15 KiB
Scheme
432 lines
15 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2022-2023 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2022 ( <paren@disroot.org>
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;;; Copyright © 2023 conses <contact@conses.eu>
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;;; Copyright © 2023 Janneke Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu home services desktop)
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#:use-module (gnu home services)
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#:use-module (gnu home services shepherd)
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#:use-module (gnu services configuration)
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#:autoload (gnu packages glib) (dbus)
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#:autoload (gnu packages xdisorg) (redshift unclutter)
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#:autoload (gnu packages xorg) (setxkbmap xmodmap)
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#:use-module (guix records)
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#:use-module (guix gexp)
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#:use-module (srfi srfi-1)
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#:use-module (ice-9 match)
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#:export (home-x11-service-type
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home-redshift-configuration
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home-redshift-configuration?
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home-redshift-service-type
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home-dbus-configuration
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home-dbus-service-type
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home-unclutter-configuration
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home-unclutter-service-type
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home-xmodmap-configuration
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home-xmodmap-service-type))
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;;;
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;;; Waiting for X11.
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;;;
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(define (x11-shepherd-service delay)
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(list (shepherd-service
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(provision '(x11-display))
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(modules '((ice-9 ftw)
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(ice-9 match)
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(srfi srfi-1)))
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(start
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#~(lambda* (#:optional (display (getenv "DISPLAY")))
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(define x11-directory
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"/tmp/.X11-unix")
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(define (find-display delay)
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;; Wait for an accessible socket to show up in X11-DIRECTORY,
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;; up to DELAY seconds.
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(let loop ((attempts delay))
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(define socket
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(find (match-lambda
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((or "." "..") #f)
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(name
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(let ((name (in-vicinity x11-directory
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name)))
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(access? name O_RDWR))))
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(or (scandir x11-directory) '())))
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(if (and socket (string-prefix? "X" socket))
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(let ((display (string-append
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":" (string-drop socket 1))))
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(format #t "X11 display server found at ~s.~%"
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display)
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display)
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(if (zero? attempts)
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(begin
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(format (current-error-port)
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"X11 display server did not show up; \
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giving up.\n")
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#f)
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(begin
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(sleep 1)
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(loop (- attempts 1)))))))
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(let ((display (or display (find-display #$delay))))
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(when display
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;; Note: 'make-forkexec-constructor' calls take their
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;; default #:environment-variables value before this service
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;; is started and are thus unaffected by the 'setenv' call
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;; below. Users of this service have to explicitly query
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;; its value.
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(setenv "DISPLAY" display))
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display)))
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(stop #~(lambda (_)
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(unsetenv "DISPLAY")
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#f))
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(respawn? #f))))
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(define home-x11-service-type
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(service-type
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(name 'home-x11-display)
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(extensions (list (service-extension home-shepherd-service-type
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x11-shepherd-service)))
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(default-value 10)
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(description
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"Create a @code{x11-display} Shepherd service that waits for the X
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Window (or ``X11'') graphical display server to be up and running, up to a
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configurable delay, and sets the @code{DISPLAY} environment variable of
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@command{shepherd} itself accordingly. If no accessible X11 server shows up
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during that time, the @code{x11-display} service is marked as failing to
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start.")))
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;;;
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;;; Redshift.
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;;;
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(define (serialize-integer field value)
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(string-append (match field
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('daytime-temperature "temp-day")
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('nighttime-temperature "temp-night")
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('daytime-brightness "brightness-day")
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('nighttime-brightness "brightness-night")
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('latitude "lat")
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('longitude "lon")
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(_ (symbol->string field)))
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"=" (number->string value) "\n"))
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(define (serialize-symbol field value)
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(string-append (symbol->string field)
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"=" (symbol->string value) "\n"))
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(define (serialize-string field value)
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(string-append (symbol->string field)
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"=" value "\n"))
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(define serialize-inexact-number serialize-integer)
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(define (inexact-number? n)
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(and (number? n) (inexact? n)))
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(define-maybe inexact-number)
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(define-maybe string)
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(define (serialize-raw-configuration-string field value)
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value)
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(define raw-configuration-string? string?)
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(define-configuration home-redshift-configuration
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(redshift
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(file-like redshift)
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"Redshift package to use.")
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(location-provider
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(symbol 'geoclue2)
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"Geolocation provider---@code{'manual} or @code{'geoclue2}.
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In the former case, you must also specify the @code{latitude} and
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@code{longitude} fields so Redshift can determine daytime at your place. In
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the latter case, the Geoclue system service must be running; it will be
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queried for location information.")
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(adjustment-method
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(symbol 'randr)
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"Color adjustment method.")
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;; Default values from redshift(1).
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(daytime-temperature
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(integer 6500)
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"Daytime color temperature (kelvins).")
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(nighttime-temperature
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(integer 4500)
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"Nighttime color temperature (kelvins).")
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(daytime-brightness
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maybe-inexact-number
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"Daytime screen brightness, between 0.1 and 1.0.")
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(nighttime-brightness
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maybe-inexact-number
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"Nighttime screen brightness, between 0.1 and 1.0.")
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(latitude
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maybe-inexact-number
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"Latitude, when @code{location-provider} is @code{'manual}.")
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(longitude
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maybe-inexact-number
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"Longitude, when @code{location-provider} is @code{'manual}.")
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(dawn-time
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maybe-string
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"Custom time for the transition from night to day in the
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morning---@code{\"HH:MM\"} format. When specified, solar elevation is not
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used to determine the daytime/nighttime period.")
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(dusk-time
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maybe-string
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"Likewise, custom time for the transition from day to night in the
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evening.")
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(extra-content
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(raw-configuration-string "")
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"Extra content appended as-is to the Redshift configuration file. Run
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@command{man redshift} for more information about the configuration file
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format."))
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(define (serialize-redshift-configuration config)
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(define location-fields
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'(latitude longitude))
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(define (location-field? field)
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(memq (configuration-field-name field) location-fields))
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(define (secondary-field? field)
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(or (location-field? field)
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(memq (configuration-field-name field)
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'(redshift extra-content))))
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#~(string-append
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"[redshift]\n"
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#$(serialize-configuration config
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(remove secondary-field?
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home-redshift-configuration-fields))
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#$(home-redshift-configuration-extra-content config)
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"\n[manual]\n"
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#$(serialize-configuration config
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(filter location-field?
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home-redshift-configuration-fields))))
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(define (redshift-shepherd-service config)
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(define config-file
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(computed-file "redshift.conf"
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#~(call-with-output-file #$output
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(lambda (port)
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(display #$(serialize-redshift-configuration config)
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port)))))
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(list (shepherd-service
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(documentation "Redshift program.")
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(provision '(redshift))
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;; Depend on 'x11-display', which sets 'DISPLAY' if an X11 server is
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;; available, and fails to start otherwise.
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(requirement '(x11-display))
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(modules '((srfi srfi-1)
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(srfi srfi-26)))
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(start #~(lambda _
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(fork+exec-command
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(list #$(file-append
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(home-redshift-configuration-redshift config)
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"/bin/redshift")
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"-c" #$config-file)
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;; Inherit the 'DISPLAY' variable set by 'x11-display'.
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#:environment-variables
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(cons (string-append "DISPLAY=" (getenv "DISPLAY"))
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(remove (cut string-prefix? "DISPLAY=" <>)
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(default-environment-variables))))))
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(stop #~(make-kill-destructor))
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(actions (list (shepherd-configuration-action config-file))))))
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(define home-redshift-service-type
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(service-type
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(name 'home-redshift)
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(extensions (list (service-extension home-shepherd-service-type
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redshift-shepherd-service)
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;; Ensure 'home-x11-service-type' is instantiated so we
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;; can depend on the Shepherd 'x11-display' service.
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(service-extension home-x11-service-type
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(const #t))))
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(default-value (home-redshift-configuration))
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(description
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"Run Redshift, a program that adjusts the color temperature of display
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according to time of day.")))
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;;;
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;;; D-Bus.
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;;;
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(define-record-type* <home-dbus-configuration>
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home-dbus-configuration make-home-dbus-configuration
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home-dbus-configuration?
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(dbus home-dbus-dbus ;file-like
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(default dbus)))
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(define (home-dbus-shepherd-services config)
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(list (shepherd-service
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(documentation "Run the D-Bus daemon in session-specific mode.")
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(provision '(dbus))
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(start #~(make-forkexec-constructor
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(list #$(file-append (home-dbus-dbus config)
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"/bin/dbus-daemon")
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"--nofork" "--session"
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(format #f "--address=unix:path=~a/bus"
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(or (getenv "XDG_RUNTIME_DIR")
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(format #f "/run/user/~a"
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(getuid)))))
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#:environment-variables
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(cons "DBUS_VERBOSE=1"
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(default-environment-variables))
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#:log-file
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(format #f "~a/log/dbus.log"
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(or (getenv "XDG_STATE_HOME")
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(format #f "~a/.local/state"
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(getenv "HOME"))))))
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(stop #~(make-kill-destructor)))))
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(define (home-dbus-environment-variables config)
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'(("DBUS_SESSION_BUS_ADDRESS"
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. "unix:path=${XDG_RUNTIME_DIR:-/run/user/$UID}/bus")))
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(define home-dbus-service-type
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(service-type
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(name 'home-dbus)
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(extensions
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(list (service-extension home-shepherd-service-type
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home-dbus-shepherd-services)
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(service-extension home-environment-variables-service-type
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home-dbus-environment-variables)))
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(default-value (home-dbus-configuration))
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(description
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"Run the session-specific D-Bus inter-process message bus.")))
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;;;
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;;; Unclutter.
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;;;
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(define-configuration/no-serialization home-unclutter-configuration
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(unclutter
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(file-like unclutter)
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"The @code{unclutter} package to use.")
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(idle-timeout
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(integer 5)
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"Timeout in seconds after which to hide the cursor."))
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(define (home-unclutter-shepherd-service config)
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(list
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(shepherd-service
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(provision '(unclutter))
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(requirement '())
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(one-shot? #t)
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(start #~(make-forkexec-constructor
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(list
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#$(file-append
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(home-unclutter-configuration-unclutter config)
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"/bin/unclutter")
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"-idle"
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(number->string
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#$(home-unclutter-configuration-idle-timeout config)))
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#:log-file (string-append
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(or (getenv "XDG_STATE_HOME")
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(format #f "~a/.local/state"
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(getenv "HOME")))
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"/log/unclutter.log"))))))
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(define home-unclutter-service-type
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(service-type
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(name 'home-unclutter)
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(extensions
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(list
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(service-extension home-shepherd-service-type
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home-unclutter-shepherd-service)))
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(default-value (home-unclutter-configuration))
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(description "Run the @code{unclutter} daemon, which, on systems using the
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Xorg graphical display server, automatically hides the cursor after a
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user-defined timeout has expired.")))
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;;;
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;;; Xmodmap.
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;;;
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(define-configuration/no-serialization home-xmodmap-configuration
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(xmodmap
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(file-like xmodmap)
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"The @code{xmodmap} package to use.")
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(key-map
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(list '())
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"List of expressions to be read by @code{xmodmap} on service startup."))
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(define (serialize-xmodmap-configuration field-name val)
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(define serialize-field
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(match-lambda
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((key . value)
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(format #f "~a = ~a" key value))
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(e e)))
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#~(string-append
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#$@(interpose (map serialize-field val) "\n" 'suffix)))
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(define (xmodmap-shepherd-service config)
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(define config-file
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(mixed-text-file
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"config"
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(serialize-xmodmap-configuration
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#f (home-xmodmap-configuration-key-map config))))
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(list
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(shepherd-service
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(provision '(xmodmap))
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(start #~(make-system-constructor
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(string-join
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(list #$(file-append
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(home-xmodmap-configuration-xmodmap config)
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"/bin/xmodmap")
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#$config-file))))
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(stop #~(make-system-constructor
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#$(file-append setxkbmap "/bin/setxkbmap")))
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(documentation "On startup, run @code{xmodmap} and read the expressions in
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the configuration file. On stop, reset all the mappings back to the
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defaults."))))
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(define home-xmodmap-service-type
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(service-type
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(name 'home-xmodmap)
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(extensions
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(list
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(service-extension home-shepherd-service-type
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xmodmap-shepherd-service)))
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(default-value (home-xmodmap-configuration))
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(description "Run the @code{xmodmap} utility to modify keymaps and pointer
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buttons under the Xorg display server via user-defined expressions.")))
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