@@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2015-2022 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2015-2023 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Chris Marusich <cmmarusich@gmail.com>
;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2020, 2021 Ricardo Wurmus <rekado@elephly.net>
@@ -86,6 +86,10 @@ (define-module (gnu services)
instantiate-missing-services
fold-services
+ remove-service-extensions
+ for-home
+ for-home?
+
service-error?
missing-value-service-error?
missing-value-service-error-type
@@ -1225,4 +1229,23 @@ (define* (fold-services services
(G_ "more than one target service of type '~a'")
(service-type-name target-type)))))))))
+(define (remove-service-extensions type lst)
+ "Return TYPE, a service type, without any of the service extensions
+targeting one of the types in LST."
+ (service-type
+ (inherit type)
+ (extensions (remove (lambda (extension)
+ (memq (service-extension-target extension) lst))
+ (service-type-extensions type)))))
+
+(define-syntax-parameter for-home?
+ ;; Whether the configuration being defined is for a Home service.
+ (identifier-syntax #f))
+
+(define-syntax-rule (for-home exp ...)
+ "Mark EXP, which typically defines a service configuration, as targeting a
+Home service rather than a System service."
+ (syntax-parameterize ((for-home? (identifier-syntax #t)))
+ exp ...))
+
;;; services.scm ends here.