From c70cf1a724fb15e108dc842413db15a0b9f4bc10 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Sun, 29 Mar 2020 01:21:32 +0100 Subject: store: Add 'references/cached'. * guix/store.scm (references/cached): New procedure. --- guix/store.scm | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/guix/store.scm b/guix/store.scm index b3641ef95d..ca8c0e5ef8 100644 --- a/guix/store.scm +++ b/guix/store.scm @@ -135,6 +135,7 @@ (define-module (guix store) built-in-builders references + references/cached references/substitutes references* query-path-info* @@ -1393,6 +1394,13 @@ (define %reference-cache ;; would use a cache associated with the daemon connection instead (XXX). (make-hash-table 100)) +(define (references/cached store item) + "Like 'references', but cache results." + (or (hash-ref %reference-cache item) + (let ((references (references store item))) + (hash-set! %reference-cache item references) + references))) + (define (references/substitutes store items) "Return the list of list of references of ITEMS; the result has the same length as ITEMS. Query substitute information for any item missing from the -- cgit v1.2.3