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guix package: Clarify upgrade code.

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* guix/scripts/package.scm (upgradeable?): Rename to...
(upgraded-manifest-entry): ... this.  Change to take a <manifest-entry>
and to return a <manifest-entry>.
(options->installable)[to-upgrade]: Adjust accordingly.
This commit is contained in:
Ludovic Courtès 2016-09-06 19:27:27 +02:00
parent 6fabb196e3
commit dd72173455
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GPG Key ID: 090B11993D9AEBB5
1 changed files with 22 additions and 23 deletions
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45
guix/scripts/package.scm
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@ -261,19 +261,25 @@ synopsis or description matches all of REGEXPS."
((<) #t)
(else #f)))))
(define (upgradeable? name current-version current-path)
"Return #t if there's a version of package NAME newer than CURRENT-VERSION,
or if the newest available version is equal to CURRENT-VERSION but would have
an output path different than CURRENT-PATH."
(match (vhash-assoc name (find-newest-available-packages))
((_ candidate-version pkg . rest)
(case (version-compare candidate-version current-version)
((>) #t)
((<) #f)
((=) (let ((candidate-path (derivation->output-path
(package-derivation (%store) pkg))))
(not (string=? current-path candidate-path))))))
(#f #f)))
(define (upgraded-manifest-entry entry)
"Return either a <manifest-entry> corresponding to an upgrade of ENTRY, or
#f if no upgrade was found."
(match entry
(($ <manifest-entry> name version output (? string? path))
(match (vhash-assoc name (find-newest-available-packages))
((_ candidate-version pkg . rest)
(case (version-compare candidate-version version)
((>)
(package->manifest-entry pkg output))
((<)
#f)
((=)
(let ((candidate-path (derivation->output-path
(package-derivation (%store) pkg))))
(and (not (string=? path candidate-path))
(package->manifest-entry pkg output))))))
(#f
#f)))))
;;;
@ -560,16 +566,9 @@ return the new list of manifest entries."
(options->upgrade-predicate opts))
(define to-upgrade
(filter-map (match-lambda
(($ <manifest-entry> name version output path _)
(and (upgrade? name)
(upgradeable? name version path)
(let ((output (or output "out")))
(call-with-values
(lambda ()
(specification->package+output name output))
package->manifest-entry))))
(_ #f))
(filter-map (lambda (entry)
(and (upgrade? (manifest-entry-name entry))
(upgraded-manifest-entry entry)))
(manifest-entries manifest)))
(define to-install