store: Add 'log-file' procedure.

* guix/store.scm (log-file): New procedure.
* tests/store.scm ("log-file, derivation", "log-file, output file
  name"): New tests.

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/store.scm b/tests/store.scm
index b5e0cb0eab..430027c33b 100644
--- a/tests/store.scm
+++ b/tests/store.scm
@@ -140,6 +140,33 @@
          (equal? (valid-derivers %store o)
                  (list (derivation-file-name d))))))
 
+(test-assert "log-file, derivation"
+  (let* ((b (add-text-to-store %store "build" "echo $foo > $out" '()))
+         (s (add-to-store %store "bash" #t "sha256"
+                          (search-bootstrap-binary "bash"
+                                                   (%current-system))))
+         (d (derivation %store "the-thing"
+                        s `("-e" ,b)
+                        #:env-vars `(("foo" . ,(random-text)))
+                        #:inputs `((,b) (,s)))))
+    (and (build-derivations %store (list d))
+         (file-exists? (pk (log-file %store (derivation-file-name d)))))))
+
+(test-assert "log-file, output file name"
+  (let* ((b (add-text-to-store %store "build" "echo $foo > $out" '()))
+         (s (add-to-store %store "bash" #t "sha256"
+                          (search-bootstrap-binary "bash"
+                                                   (%current-system))))
+         (d (derivation %store "the-thing"
+                        s `("-e" ,b)
+                        #:env-vars `(("foo" . ,(random-text)))
+                        #:inputs `((,b) (,s))))
+         (o (derivation->output-path d)))
+    (and (build-derivations %store (list d))
+         (file-exists? (pk (log-file %store o)))
+         (string=? (log-file %store (derivation-file-name d))
+                   (log-file %store o)))))
+
 (test-assert "no substitutes"
   (let* ((s  (open-connection))
          (d1 (package-derivation s %bootstrap-guile (%current-system)))