diff options
Diffstat (limited to 'guix/derivations.scm')
| -rw-r--r-- | guix/derivations.scm | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/guix/derivations.scm b/guix/derivations.scm index 8daad4b81d..7737e39b2d 100644 --- a/guix/derivations.scm +++ b/guix/derivations.scm @@ -249,6 +249,17 @@ substituter many times." (define valid? (cut valid-path? store <>)) + (define valid-input? + (cut valid-derivation-input? store <>)) + + (define (dependencies drv) + ;; Skip prerequisite sub-trees of DRV whose root is valid. This allows us + ;; to ask the substituter for just as much as needed, instead of asking it + ;; for the whole world, which can be significantly faster when substitute + ;; info is not already in cache. + (append-map derivation-input-output-paths + (derivation-prerequisites drv valid-input?))) + (let* ((paths (delete-duplicates (fold (lambda (drv result) (let ((self (match (derivation->output-paths drv) @@ -256,11 +267,8 @@ substituter many times." paths)))) (if (every valid? self) result - (let ((deps - (append-map derivation-input-output-paths - (derivation-prerequisites drv)))) - (append (remove valid? (append self deps)) - result))))) + (append (append self (dependencies drv)) + result)))) '() drv))) (subst (list->set (substitutable-paths store paths)))) |