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Diffstat (limited to 'gnu/home/services/desktop.scm')
| -rw-r--r-- | gnu/home/services/desktop.scm | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/gnu/home/services/desktop.scm b/gnu/home/services/desktop.scm new file mode 100644 index 0000000000..cbb9cf76da --- /dev/null +++ b/gnu/home/services/desktop.scm @@ -0,0 +1,174 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2022 Ludovic Courtès <ludo@gnu.org> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (gnu home services desktop) + #:use-module (gnu home services) + #:use-module (gnu home services shepherd) + #:use-module (gnu services configuration) + #:autoload (gnu packages xdisorg) (redshift) + #:use-module (guix records) + #:use-module (guix gexp) + #:use-module (srfi srfi-1) + #:use-module (ice-9 match) + #:export (home-redshift-configuration + home-redshift-configuration? + + home-redshift-service-type)) + + +;;; +;;; Redshift. +;;; + +(define (serialize-integer field value) + (string-append (match field + ('daytime-temperature "temp-day") + ('nighttime-temperature "temp-night") + ('daytime-brightness "brightness-day") + ('nighttime-brightness "brightness-night") + ('latitude "lat") + ('longitude "lon") + (_ (symbol->string field))) + "=" (number->string value) "\n")) + +(define (serialize-symbol field value) + (string-append (symbol->string field) + "=" (symbol->string value) "\n")) + +(define (serialize-string field value) + (string-append (symbol->string field) + "=" value "\n")) + +(define serialize-inexact-number serialize-integer) + +(define (inexact-number? n) + (and (number? n) (inexact? n))) +(define-maybe inexact-number) +(define-maybe string) + +(define (serialize-raw-configuration-string field value) + value) +(define raw-configuration-string? string?) + +(define-configuration home-redshift-configuration + (redshift + (file-like redshift) + "Redshift package to use.") + + (location-provider + (symbol 'geoclue2) + "Geolocation provider---@code{'manual} or @code{'geoclue2}. + +In the former case, you must also specify the @code{latitude} and +@code{longitude} fields so Redshift can determine daytime at your place. In +the latter case, the Geoclue system service must be running; it will be +queried for location information.") + (adjustment-method + (symbol 'randr) + "Color adjustment method.") + + ;; Default values from redshift(1). + (daytime-temperature + (integer 6500) + "Daytime color temperature (kelvins).") + (nighttime-temperature + (integer 4500) + "Nighttime color temperature (kelvins).") + + (daytime-brightness + (maybe-inexact-number 'disabled) + "Daytime screen brightness, between 0.1 and 1.0.") + (nighttime-brightness + (maybe-inexact-number 'disabled) + "Nighttime screen brightness, between 0.1 and 1.0.") + + (latitude + (maybe-inexact-number 'disabled) + "Latitude, when @code{location-provider} is @code{'manual}.") + (longitude + (maybe-inexact-number 'disabled) + "Longitude, when @code{location-provider} is @code{'manual}.") + + (dawn-time + (maybe-string 'disabled) + "Custom time for the transition from night to day in the +morning---@code{\"HH:MM\"} format. When specified, solar elevation is not +used to determine the daytime/nighttime period.") + (dusk-time + (maybe-string 'disabled) + "Likewise, custom time for the transition from day to night in the +evening.") + + (extra-content + (raw-configuration-string "") + "Extra content appended as-is to the Redshift configuration file. Run +@command{man redshift} for more information about the configuration file +format.")) + +(define (serialize-redshift-configuration config) + (define location-fields + '(latitude longitude)) + + (define (location-field? field) + (memq (configuration-field-name field) location-fields)) + + (define (secondary-field? field) + (or (location-field? field) + (memq (configuration-field-name field) + '(redshift extra-content)))) + + #~(string-append + "[redshift]\n" + #$(serialize-configuration config + (remove secondary-field? + home-redshift-configuration-fields)) + + #$(home-redshift-configuration-extra-content config) + + "\n[manual]\n" + #$(serialize-configuration config + (filter location-field? + home-redshift-configuration-fields)))) + +(define (redshift-shepherd-service config) + (define config-file + (computed-file "redshift.conf" + #~(call-with-output-file #$output + (lambda (port) + (display #$(serialize-redshift-configuration config) + port))))) + + (list (shepherd-service + (documentation "Redshift program.") + (provision '(redshift)) + ;; FIXME: This fails to start if Home is first activated from a + ;; non-X11 session. + (start #~(make-forkexec-constructor + (list #$(file-append redshift "/bin/redshift") + "-c" #$config-file))) + (stop #~(make-kill-destructor))))) + +(define home-redshift-service-type + (service-type + (name 'home-redshift) + (extensions (list (service-extension home-shepherd-service-type + redshift-shepherd-service))) + (default-value (home-redshift-configuration)) + (description + "Run Redshift, a program that adjusts the color temperature of display +according to time of day."))) |