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authorLudovic Courtès <ludo@gnu.org>2018-03-15 11:34:57 +0100
committerLudovic Courtès <ludo@gnu.org>2018-03-15 11:34:57 +0100
commit88cd7bbd3dc8ecb6b02435338eff1524ad7154ed (patch)
tree0fc4040720238c371cddf46ed5b5d35c9ec02eb6 /gnu
parent61b1dbbdcd87f6b37d6b87715a9a4da4e63485ab (diff)
downloadpatches-88cd7bbd3dc8ecb6b02435338eff1524ad7154ed.tar
patches-88cd7bbd3dc8ecb6b02435338eff1524ad7154ed.tar.gz
services: 'shepherd-service-type' now accepts a default value.
* gnu/services/shepherd.scm (shepherd-service-type): Add a second form with an additional 'default' parameter.
Diffstat (limited to 'gnu')
-rw-r--r--gnu/services/shepherd.scm26
1 files changed, 18 insertions, 8 deletions
diff --git a/gnu/services/shepherd.scm b/gnu/services/shepherd.scm
index f7c6983cb0..000e85eb86 100644
--- a/gnu/services/shepherd.scm
+++ b/gnu/services/shepherd.scm
@@ -104,14 +104,24 @@
;; <shepherd-service> objects.
(service shepherd-root-service-type '()))
-(define-syntax-rule (shepherd-service-type service-name proc)
- "Return a <service-type> denoting a simple shepherd service--i.e., the type
-for a service that extends SHEPHERD-ROOT-SERVICE-TYPE and nothing else."
- (service-type
- (name service-name)
- (extensions
- (list (service-extension shepherd-root-service-type
- (compose list proc))))))
+(define-syntax shepherd-service-type
+ (syntax-rules ()
+ "Return a <service-type> denoting a simple shepherd service--i.e., the type
+for a service that extends SHEPHERD-ROOT-SERVICE-TYPE and nothing else. When
+DEFAULT is given, use it as the service's default value."
+ ((_ service-name proc default)
+ (service-type
+ (name service-name)
+ (extensions
+ (list (service-extension shepherd-root-service-type
+ (compose list proc))))
+ (default-value default)))
+ ((_ service-name proc)
+ (service-type
+ (name service-name)
+ (extensions
+ (list (service-extension shepherd-root-service-type
+ (compose list proc))))))))
(define %default-imported-modules
;; Default set of modules imported for a service's consumption.