diff options
| -rw-r--r-- | guix/derivations.scm | 16 | ||||
| -rw-r--r-- | tests/derivations.scm | 2 |
2 files changed, 13 insertions, 5 deletions
diff --git a/guix/derivations.scm b/guix/derivations.scm index 9aaab05ecb..5e457f1893 100644 --- a/guix/derivations.scm +++ b/guix/derivations.scm @@ -271,13 +271,14 @@ result is the set of prerequisites of DRV not already in valid." (define* (substitution-oracle store drv #:key (mode (build-mode normal))) "Return a one-argument procedure that, when passed a store file name, -returns #t if it's substitutable and #f otherwise. The returned procedure +returns a 'substitutable?' if it's substitutable and #f otherwise. +The returned procedure knows about all substitutes for all the derivations listed in DRV, *except* those that are already valid (that is, it won't bother checking whether an item is substitutable if it's already on disk); it also knows about their prerequisites, unless they are themselves substitutable. -Creating a single oracle (thus making a single 'substitutable-paths' call) and +Creating a single oracle (thus making a single 'substitutable-path-info' call) and reusing it is much more efficient than calling 'has-substitutes?' or similar repeatedly, because it avoids the costs associated with launching the substituter many times." @@ -318,8 +319,15 @@ substituter many times." (cons* self (dependencies drv) result))))) '() drv)))) - (subst (list->set (substitutable-paths store paths)))) - (cut set-contains? subst <>))) + (subst (fold (lambda (subst vhash) + (vhash-cons (substitutable-path subst) subst + vhash)) + vlist-null + (substitutable-path-info store paths)))) + (lambda (item) + (match (vhash-assoc item subst) + (#f #f) + ((key . value) value))))) (define* (derivation-prerequisites-to-build store drv #:key diff --git a/tests/derivations.scm b/tests/derivations.scm index cabbf7b951..d4e1a32bb6 100644 --- a/tests/derivations.scm +++ b/tests/derivations.scm @@ -919,7 +919,7 @@ (set! query paths) '()) - (mock ((guix store) substitutable-paths + (mock ((guix store) substitutable-path-info record-substitutable-path-query) (let ((pred (substitution-oracle store (list drv)))) |