diff options
| -rw-r--r-- | guix/inferior.scm | 26 | ||||
| -rw-r--r-- | tests/inferior.scm | 22 |
2 files changed, 47 insertions, 1 deletions
diff --git a/guix/inferior.scm b/guix/inferior.scm index 6cfa146029..027418a98d 100644 --- a/guix/inferior.scm +++ b/guix/inferior.scm @@ -61,6 +61,7 @@ inferior-object? inferior-packages + inferior-available-packages lookup-inferior-packages inferior-package? @@ -256,6 +257,31 @@ equivalent. Return #f if the inferior could not be launched." vlist-null (inferior-packages inferior))) +(define (inferior-available-packages inferior) + "Return the list of name/version pairs corresponding to the set of packages +available in INFERIOR. + +This is faster and requires less resource-intensive than calling +'inferior-packages'." + (if (inferior-eval '(defined? 'fold-available-packages) + inferior) + (inferior-eval '(fold-available-packages + (lambda* (name version result + #:key supported? deprecated? + #:allow-other-keys) + (if (and supported? (not deprecated?)) + (acons name version result) + result)) + '()) + inferior) + + ;; As a last resort, if INFERIOR is old and lacks + ;; 'fold-available-packages', fall back to 'inferior-packages'. + (map (lambda (package) + (cons (inferior-package-name package) + (inferior-package-version package))) + (inferior-packages inferior)))) + (define* (lookup-inferior-packages inferior name #:optional version) "Return the sorted list of inferior packages matching NAME in INFERIOR, with highest version numbers first. If VERSION is true, return only packages with diff --git a/tests/inferior.scm b/tests/inferior.scm index d5a894ca8f..71ebf8f59b 100644 --- a/tests/inferior.scm +++ b/tests/inferior.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org> ;;; ;;; This file is part of GNU Guix. ;;; @@ -89,6 +89,26 @@ (close-inferior inferior) result)))) +(test-equal "inferior-available-packages" + (take (sort (fold-available-packages + (lambda* (name version result + #:key supported? deprecated? + #:allow-other-keys) + (if (and supported? (not deprecated?)) + (alist-cons name version result) + result)) + '()) + (lambda (x y) + (string<? (car x) (car y)))) + 10) + (let* ((inferior (open-inferior %top-builddir + #:command "scripts/guix")) + (packages (inferior-available-packages inferior))) + (close-inferior inferior) + (take (sort packages (lambda (x y) + (string<? (car x) (car y)))) + 10))) + (test-equal "lookup-inferior-packages" (let ((->list (lambda (package) (list (package-name package) |