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guix refresh: Keep only the newest versions of packages as upgrade candidates. 

* guix/scripts/refresh.scm (guix-refresh)[keep-newest]: New procedure.
  Use it to keep only once copy of each package.
This commit is contained in:
Ludovic Courtès 2013-07-11 19:56:30 +02:00
parent d04434c067
commit 560d4787f4
1 changed files with 15 additions and 2 deletions
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17
guix/scripts/refresh.scm
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@ -159,6 +159,20 @@ downloaded and authenticated; not updating")
(alist-cons 'argument arg result))
%default-options))
(define (keep-newest package lst)
;; If a newer version of PACKAGE is already in LST, return LST; otherwise
;; return LST minus the other version of PACKAGE in it, plus PACKAGE.
(let ((name (package-name package)))
(match (find (lambda (p)
(string=? (package-name p) name))
lst)
((? package? other)
(if (version>? (package-version other) (package-version package))
lst
(cons package (delq other lst))))
(_
(cons package lst)))))
(define core-package?
(let* ((input->package (match-lambda
((name (? package? package) _ ...) package)
@ -198,10 +212,9 @@ update would trigger a complete rebuild."
('core core-package?)
('non-core (negate core-package?))
(_ (const #t)))))
;; TODO: Keep only the newest of each package.
(fold-packages (lambda (package result)
(if (select? package)
(cons package result)
(keep-newest package result)
result))
'())))
(some ; user-specified packages