diff options
Diffstat (limited to 'gnu/packages.scm')
| -rw-r--r-- | gnu/packages.scm | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/gnu/packages.scm b/gnu/packages.scm index 5629061788..b4ac6661ca 100644 --- a/gnu/packages.scm +++ b/gnu/packages.scm @@ -140,17 +140,19 @@ for system '~a'") directory)) %load-path))) -(define (fold-packages proc init) - "Call (PROC PACKAGE RESULT) for each available package, using INIT as -the initial value of RESULT. It is guaranteed to never traverse the -same package twice." +(define* (fold-packages proc init + #:optional + (modules (all-modules (%package-module-path)))) + "Call (PROC PACKAGE RESULT) for each available package defined in one of +MODULES, using INIT as the initial value of RESULT. It is guaranteed to never +traverse the same package twice." (fold-module-public-variables (lambda (object result) (if (and (package? object) (not (hidden-package? object))) (proc object result) result)) init - (all-modules (%package-module-path)))) + modules)) (define find-packages-by-name (let ((packages (delay |