diff options
Diffstat (limited to 'gnu/services/herd.scm')
| -rw-r--r-- | gnu/services/herd.scm | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gnu/services/herd.scm b/gnu/services/herd.scm index 8c96b70731..8ff817759d 100644 --- a/gnu/services/herd.scm +++ b/gnu/services/herd.scm @@ -50,6 +50,7 @@ unload-services unload-service load-services + load-services/safe start-service stop-service)) @@ -232,6 +233,25 @@ returns a shepherd <service> object." `(primitive-load ,file)) files)))) +(define (load-services/safe files) + "This is like 'load-services', but make sure only the subset of FILES that +can be safely reloaded is actually reloaded. + +This is done to accommodate the Shepherd < 0.15.0 where services lacked the +'replacement' slot, and where 'register-services' would throw an exception +when passed a service with an already-registered name." + (eval-there `(let* ((services (map primitive-load ',files)) + (slots (map slot-definition-name + (class-slots <service>))) + (can-replace? (memq 'replacement slots))) + (define (registered? service) + (not (null? (lookup-services (canonical-name service))))) + + (apply register-services + (if can-replace? + services + (remove registered? services)))))) + (define (start-service name) (with-shepherd-action name ('start) result result)) |