inferior: Add 'inferior-eval-with-store'.

* guix/inferior.scm (inferior-eval-with-store): New procedure, with code
formerly in 'inferior-package-derivation'.
(inferior-package-derivation): Rewrite in terms of
'inferior-eval-with-store'.
* tests/inferior.scm ("inferior-eval-with-store"): New test.

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/inferior.scm b/tests/inferior.scm
index d1d5c00a77..d5a894ca8f 100644
--- a/tests/inferior.scm
+++ b/tests/inferior.scm
@@ -157,6 +157,15 @@
     (close-inferior inferior)
     result))
 
+(test-equal "inferior-eval-with-store"
+  (add-text-to-store %store "foo" "Hello, world!")
+  (let* ((inferior (open-inferior %top-builddir
+                                  #:command "scripts/guix")))
+    (inferior-eval-with-store inferior %store
+                              '(lambda (store)
+                                 (add-text-to-store store "foo"
+                                                    "Hello, world!")))))
+
 (test-equal "inferior-package-derivation"
   (map derivation-file-name
        (list (package-derivation %store %bootstrap-guile "x86_64-linux")