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-rw-r--r--tests/grafts.scm62
1 files changed, 62 insertions, 0 deletions
diff --git a/tests/grafts.scm b/tests/grafts.scm
index f2ff839fd8..4eff06b4b3 100644
--- a/tests/grafts.scm
+++ b/tests/grafts.scm
@@ -218,4 +218,66 @@
(let ((out (derivation->output-path grafted)))
(file-is-directory? (string-append out "/" repl))))))
+(test-assert "graft-derivation, grafts are not shadowed"
+ ;; We build a DAG as below, where dotted arrows represent replacements and
+ ;; solid arrows represent dependencies:
+ ;;
+ ;; P1 ·············> P1R
+ ;; |\__________________.
+ ;; v v
+ ;; P2 ·············> P2R
+ ;; |
+ ;; v
+ ;; P3
+ ;;
+ ;; We want to make sure that the two grafts we want to apply to P3 are
+ ;; honored and not shadowed by other computed grafts.
+ (let* ((p1 (build-expression->derivation
+ %store "p1"
+ '(mkdir (assoc-ref %outputs "out"))))
+ (p1r (build-expression->derivation
+ %store "P1"
+ '(let ((out (assoc-ref %outputs "out")))
+ (mkdir out)
+ (call-with-output-file (string-append out "/replacement")
+ (const #t)))))
+ (p2 (build-expression->derivation
+ %store "p2"
+ `(let ((out (assoc-ref %outputs "out")))
+ (mkdir out)
+ (chdir out)
+ (symlink (assoc-ref %build-inputs "p1") "p1"))
+ #:inputs `(("p1" ,p1))))
+ (p2r (build-expression->derivation
+ %store "P2"
+ `(let ((out (assoc-ref %outputs "out")))
+ (mkdir out)
+ (chdir out)
+ (symlink (assoc-ref %build-inputs "p1") "p1")
+ (call-with-output-file (string-append out "/replacement")
+ (const #t)))
+ #:inputs `(("p1" ,p1))))
+ (p3 (build-expression->derivation
+ %store "p3"
+ `(let ((out (assoc-ref %outputs "out")))
+ (mkdir out)
+ (chdir out)
+ (symlink (assoc-ref %build-inputs "p2") "p2"))
+ #:inputs `(("p2" ,p2))))
+ (p1g (graft
+ (origin p1)
+ (replacement p1r)))
+ (p2g (graft
+ (origin p2)
+ (replacement (graft-derivation %store p2r (list p1g)))))
+ (p3d (graft-derivation %store p3 (list p1g p2g))))
+ (and (build-derivations %store (list p3d))
+ (let ((out (derivation->output-path (pk p3d))))
+ ;; Make sure OUT refers to the replacement of P2, which in turn
+ ;; refers to the replacement of P1, as specified by P1G and P2G.
+ ;; It used to be the case that P2G would be shadowed by a simple
+ ;; P2->P2R graft, which is not what we want.
+ (and (file-exists? (string-append out "/p2/replacement"))
+ (file-exists? (string-append out "/p2/p1/replacement")))))))
+
(test-end)