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authorLudovic Courtès <ludo@gnu.org>2019-03-28 15:46:18 +0100
committerLudovic Courtès <ludo@gnu.org>2019-03-28 23:06:58 +0100
commitf2bf0407de70e7ae29518400d66ef968134f5169 (patch)
tree06f5ce0773696542e751c29ff7d7c986825e9048 /gnu/packages.scm
parente8cfce439afed945e352ad28f73f0a5f7840f503 (diff)
packages: Reintroduce 'find-newest-available-packages'.
This is a followup to e2a903c807ccacec5925f197ce26f626060e1953. * gnu/packages.scm (find-newest-available-packages): New procedure.
Diffstat (limited to 'gnu/packages.scm')
-rw-r--r--gnu/packages.scm25
1 files changed, 25 insertions, 0 deletions
diff --git a/gnu/packages.scm b/gnu/packages.scm
index 9f211ae23c..48390575ba 100644
--- a/gnu/packages.scm
+++ b/gnu/packages.scm
@@ -32,6 +32,7 @@
mkdir-p))
#:autoload (guix profiles) (packages->manifest)
#:use-module (guix describe)
+ #:use-module (guix deprecation)
#:use-module (ice-9 vlist)
#:use-module (ice-9 match)
#:autoload (ice-9 binary-ports) (put-bytevector)
@@ -55,6 +56,7 @@
fold-packages
fold-available-packages
+ find-newest-available-packages
find-packages-by-name
find-package-locations
find-best-packages-by-name
@@ -186,6 +188,29 @@ flags."
directory))
%load-path)))
+;; This procedure is used by Emacs-Guix up to 0.5.1.1, so keep it for now.
+;; See <https://github.com/alezost/guix.el/issues/30>.
+(define-deprecated find-newest-available-packages
+ find-packages-by-name
+ (mlambda ()
+ "Return a vhash keyed by package names, and with
+associated values of the form
+
+ (newest-version newest-package ...)
+
+where the preferred package is listed first."
+ (fold-packages (lambda (p r)
+ (let ((name (package-name p))
+ (version (package-version p)))
+ (match (vhash-assoc name r)
+ ((_ newest-so-far . pkgs)
+ (case (version-compare version newest-so-far)
+ ((>) (vhash-cons name `(,version ,p) r))
+ ((=) (vhash-cons name `(,version ,p ,@pkgs) r))
+ ((<) r)))
+ (#f (vhash-cons name `(,version ,p) r)))))
+ vlist-null)))
+
(define (fold-available-packages proc init)
"Fold PROC over the list of available packages. For each available package,
PROC is called along these lines: