diff options
Diffstat (limited to 'guix/derivations.scm')
| -rw-r--r-- | guix/derivations.scm | 14 |
1 files changed, 14 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 |