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authorLudovic Courtès <ludo@gnu.org>2023-08-06 18:23:54 +0200
committerLudovic Courtès <ludo@gnu.org>2023-08-20 22:48:47 +0200
commitdff7d2468ffe9d01b25662544af380e1794ac55a (patch)
tree2d4e5807009ffe7808175314eed8495402e1dbc2
parentc6c8106c65bc1edcbb67e4ccfdc81c01aa4afd5f (diff)
services: Define 'for-home'.
* gnu/services.scm (remove-service-extensions): New procedure. (for-home?): New syntax parameter. (for-home): New macro.
-rw-r--r--gnu/services.scm25
1 files changed, 24 insertions, 1 deletions
diff --git a/gnu/services.scm b/gnu/services.scm
index 109e050a23..eb9258977e 100644
--- a/gnu/services.scm
+++ b/gnu/services.scm
@@ -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 @@
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 @@ TARGET-TYPE; return the root service adjusted accordingly."
(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.