derivations: Add properties.

* guix/derivations.scm (derivation): Add #:properties parameter.
[user+system-env-vars]: Honor it.
(derivation-properties): New procedure.
(build-expression->derivation): Add #:properties and pass it to
'derivation'.
* guix/gexp.scm (gexp->derivation): Likewise.
* tests/derivations.scm ("derivation-properties"): New test.
* tests/gexp.scm ("gexp->derivation properties"): New test.
* doc/guix.texi (Derivations, G-Expressions): Adjust accordingly.

2 files changed, 19 insertions, 1 deletions

diff --git a/tests/derivations.scm b/tests/derivations.scm
index 159a6971b39..5f294c18278 100644
--- a/tests/derivations.scm
+++ b/tests/derivations.scm
@@ -1132,6 +1132,16 @@
                                     ((p2 . _)
                                      (string<? p1 p2)))))))))))))
 
+(test-equal "derivation-properties"
+  (list '() '((type . test)))
+  (let ((drv1 (build-expression->derivation %store "bar"
+                                            '(mkdir %output)))
+        (drv2 (build-expression->derivation %store "foo"
+                                           '(mkdir %output)
+                                           #:properties '((type . test)))))
+    (list (derivation-properties drv1)
+          (derivation-properties drv2))))
+
 (test-equal "map-derivation"
   "hello"
   (let* ((joke (package-derivation %store guile-1.8))
diff --git a/tests/gexp.scm b/tests/gexp.scm
index ab60bdab682..7ae9201c81e 100644
--- a/tests/gexp.scm
+++ b/tests/gexp.scm
@@ -476,7 +476,15 @@
     (return (and (string=? (readlink (string-append out "/foo")) guile)
                  (string=? (readlink out2) file)
                  (equal? refs (list (dirname (dirname guile))))
-                 (equal? refs2 (list file))))))
+                 (equal? refs2 (list file))
+                 (null? (derivation-properties drv))))))
+
+(test-assertm "gexp->derivation properties"
+  (mlet %store-monad ((drv (gexp->derivation "foo"
+                                             #~(mkdir #$output)
+                                             #:properties '((type . test)))))
+    (return (equal? '((type . test))
+                    (derivation-properties drv)))))
 
 (test-assertm "gexp->derivation vs. grafts"
   (mlet* %store-monad ((graft?  (set-grafting #f))