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services: sane: Support pluggable backends.

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* gnu/services/desktop.scm (sane-configuration): New record.
(sane-service-type): Add native search paths to environment.

Change-Id: Ia7b66b62cf027200dd94533f32c1e4bc0ed373d3
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Sergey Trofimov 2025-06-18 11:15:34 +02:00 • committed by Maxim Cournoyer
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56
doc/guix.texi
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@ -26957,23 +26957,46 @@ site} for more information.
@defvar sane-service-type
This service provides access to scanners @i{via}
@uref{http://www.sane-project.org, SANE} by installing the necessary
udev rules. It is included in @code{%desktop-services} (@pxref{Desktop
Services}) and relies by default on @code{sane-backends-minimal} package
(see below) for hardware support.
udev rules and pluggable backends. It is included in
@code{%desktop-services} (@pxref{Desktop Services}) and relies by
default on @code{sane-backends} package (see below) for hardware
support.
@end defvar
@defvar sane-backends-minimal
The default package which the @code{sane-service-type} installs. It
supports many recent scanners.
@end defvar
@deftp {Data Type} sane-configuration
Data type representing the configuration for SANE.
@defvar sane-backends
This package includes support for all scanners that
@code{sane-backends-minimal} supports, plus older Hewlett-Packard
scanners supported by @code{hplip} package. In order to use this on
a system which relies on @code{%desktop-services}, you may use
@code{modify-services} (@pxref{Service Reference,
@code{modify-services}}) as illustrated below:
@table @asis
@item @code{sane} (default: @code{sane})
Package containing SANE library.
@item @code{backends} (default: @code{(sane-backends)})
List of packages with pluggable SANE backends:
@itemize @bullet
@item
@code{sane-backends}: The default backend collection which supports many recent scanners,
@item
@code{sane-airscan}: A backend that enables network scanners supporting eSCL (Apple) or WSD,
(Microsoft) protocols
@item
@code{hplip}: A backend containing drivers for older Hewlett-Packard scanners,
@item
@code{utsushi}: A backend containing drivers for older Epson devices.
@end itemize
@end table
@end deftp
In order to use additional backends on a system which relies on
@code{%desktop-services}, you may use @code{modify-services}
(@pxref{Service Reference, @code{modify-services}}) as illustrated
below:
@lisp
(use-modules (gnu))
@ -26987,13 +27010,14 @@ a system which relies on @code{%desktop-services}, you may use
(define %my-desktop-services
;; List of desktop services that supports a broader range of scanners.
(modify-services %desktop-services
(sane-service-type _ => sane-backends)))
(sane-service-type _ =>
(sane-configuration
(backends (list sane-backends sane-airscan))))))
(operating-system
@dots{}
(services %my-desktop-services))
@end lisp
@end defvar
@deffn {Procedure} geoclue-application name [#:allowed? #t] [#:system? #f] [#:users '()]
Return a configuration allowing an application to access GeoClue