diff options
| -rw-r--r-- | guix/derivations.scm | 14 | ||||
| -rw-r--r-- | tests/derivations.scm | 6 |
2 files changed, 20 insertions, 0 deletions
diff --git a/guix/derivations.scm b/guix/derivations.scm index ae9d2f46c7..5a8cc2c57a 100644 --- a/guix/derivations.scm +++ b/guix/derivations.scm @@ -57,6 +57,8 @@ derivation-input-output-paths fixed-output-derivation? + offloadable-derivation? + substitutable-derivation? derivation-hash read-derivation @@ -156,6 +158,18 @@ download with a fixed hash (aka. `fetchurl')." read-derivation)) inputs))))) +(define (offloadable-derivation? drv) + "Return true if DRV can be offloaded, false otherwise." + (match (assoc "preferLocalBuild" + (derivation-builder-environment-vars drv)) + (("preferLocalBuild" . "1") #f) + (_ #t))) + +(define substitutable-derivation? + ;; Return #t if the derivation can be substituted. Currently the two are + ;; synonymous, see <http://bugs.gnu.org/18747>. + offloadable-derivation?) + (define* (derivation-prerequisites-to-build store drv #:key (outputs diff --git a/tests/derivations.scm b/tests/derivations.scm index e774fed4c3..698640b548 100644 --- a/tests/derivations.scm +++ b/tests/derivations.scm @@ -173,6 +173,12 @@ (= (stat:ino (lstat file1)) (stat:ino (lstat file2)))))))) +(test-assert "offloadable-derivation?" + (and (offloadable-derivation? (derivation %store "foo" %bash '())) + (not (offloadable-derivation? + (derivation %store "foo" %bash '() + #:local-build? #t))))) + (test-assert "fixed-output-derivation?" (let* ((builder (add-text-to-store %store "my-fixed-builder.sh" "echo -n hello > $out" '())) |