system: Add 'operating-system-with-gc-roots'.

* gnu/tests/install.scm (operating-system-with-gc-roots): Move to...
* gnu/system.scm (operating-system-with-gc-roots): ... here.  New
procedure.

2 files changed, 12 insertions, 11 deletions

diff --git a/gnu/system.scm b/gnu/system.scm
index 2c4ca55ffcb..01be1243fea 100644
--- a/gnu/system.scm
+++ b/gnu/system.scm
@@ -109,6 +109,7 @@
             operating-system-boot-script
 
             system-linux-image-file-name
+            operating-system-with-gc-roots
 
             boot-parameters
             boot-parameters?
@@ -519,6 +520,17 @@ bookkeeping."
    (append (operating-system-user-services os)
            (operating-system-essential-services os))))
 
+(define (operating-system-with-gc-roots os roots)
+  "Return a variant of OS where ROOTS are registered as GC roots."
+  (operating-system
+    (inherit os)
+
+    ;; We use this procedure for the installation OS, which already defines GC
+    ;; roots.  Add ROOTS to those.
+    (services (cons (simple-service 'extra-root
+                                    gc-root-service-type roots)
+                    (operating-system-user-services os)))))
+
 
 ;;;
 ;;; /etc.
diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index 430a1023785..7b5ee18505e 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -123,17 +123,6 @@
                                     (inherit config)
                                     (guix (current-guix))))))))
 
-(define (operating-system-with-gc-roots os roots)
-  "Return a variant of OS where ROOTS are registered as GC roots."
-  (operating-system
-    (inherit os)
-
-    ;; We use this procedure for the installation OS, which already defines GC
-    ;; roots.  Add ROOTS to those.
-    (services (cons (simple-service 'extra-root
-                                    gc-root-service-type roots)
-                    (operating-system-user-services os)))))
-
 
 (define MiB (expt 2 20))