[PATCH 4/6] services: 'fold-service-types' includes (gnu services).

["Ludovic Courtès" <ludo@gnu.org>]

* gnu/services.scm (all-service-modules): New procedure.
(fold-service-types): Use it for the default MODULES value.
---
 gnu/services.scm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gnu/services.scm b/gnu/services.scm
index 89c5d52c8..df1bedeb9 100644
--- a/gnu/services.scm
+++ b/gnu/services.scm
@@ -175,9 +175,14 @@
   (make-parameter `((,%distro-root-directory . "gnu/services")
                     (,%distro-root-directory . "gnu/system"))))
 
+(define (all-service-modules)
+  "Return the default set of service modules."
+  (cons (resolve-interface '(gnu services))
+        (all-modules (%service-type-path))))
+
 (define* (fold-service-types proc seed
                              #:optional
-                             (modules (all-modules (%service-type-path))))
+                             (modules (all-service-modules)))
   "For each service type exported by one of MODULES, call (PROC RESULT).  SEED
 is used as the initial value of RESULT."
   (fold-module-public-variables (lambda (object result)
-- 
2.15.0