8d442e8a53
* gnu/home/services/fontutils.scm (add-fontconfig-config-file): Add support for adding arbitrary SXML configuration into fonts.conf; * doc/guix.texi (Fonts Services): Update the documentation. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
94 lines
3.6 KiB
Scheme
94 lines
3.6 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2021 Andrew Tropin <andrew@trop.in>
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;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
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;;; Copyright © 2023 Giacomo Leidi <goodoldpaul@autistici.org>
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;;; Copyright © 2023 Andrew Patterson <andrewpatt7@gmail.com>
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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 fontutils)
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#:use-module (gnu home services)
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#:use-module (gnu packages fontutils)
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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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#:use-module (sxml simple)
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#:export (home-fontconfig-service-type))
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;;; Commentary:
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;;;
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;;; Services related to fonts. home-fontconfig service provides
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;;; fontconfig configuration, which allows fc-* utilities to find
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;;; fonts in Guix Home's profile and regenerates font cache on
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;;; activation.
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;;;
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;;; Code:
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(define (write-fontconfig-doctype)
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"Prints fontconfig's DOCTYPE to current-output-port."
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;; This is necessary because SXML doesn't seem to have a way to represent a doctype,
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;; but sxml->xml /does/ currently call any thunks in the SXML with the XML output port
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;; as current-output-port, allowing the output to include arbitrary text instead of
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;; just properly quoted XML.
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(format #t "<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>"))
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(define (config->sxml config)
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"Converts a <home-fontconfig-configuration> record into the SXML representation
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of fontconfig's fonts.conf file."
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(define (snippets->sxml snippet)
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(match snippet
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((or (? string? dir)
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(? gexp? dir))
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`(dir ,dir))
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((? list?)
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snippet)))
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`(*TOP* (*PI* xml "version='1.0'")
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,write-fontconfig-doctype
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(fontconfig
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,@(map snippets->sxml config))))
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(define (add-fontconfig-config-file config)
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`(("fontconfig/fonts.conf"
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,(mixed-text-file
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"fonts.conf"
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(call-with-output-string
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(lambda (port)
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(sxml->xml (config->sxml config) port)))))))
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(define (regenerate-font-cache-gexp _)
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`(("profile/share/fonts"
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,#~(system* #$(file-append fontconfig "/bin/fc-cache") "-fv"))))
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(define home-fontconfig-service-type
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(service-type (name 'home-fontconfig)
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(extensions
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(list (service-extension
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home-xdg-configuration-files-service-type
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add-fontconfig-config-file)
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(service-extension
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home-run-on-change-service-type
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regenerate-font-cache-gexp)
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(service-extension
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home-profile-service-type
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(const (list fontconfig)))))
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(compose concatenate)
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(extend append)
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(default-value '("~/.guix-home/profile/share/fonts"))
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(description
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"Provides configuration file for fontconfig and make
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fc-* utilities aware of font packages installed in Guix Home's profile.")))
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