;;; Package specification.
;;;
-(define (%find-package spec name version)
+(define* (%find-package spec name version #:key fallback?)
(match (find-best-packages-by-name name version)
((pkg . pkg*)
(unless (null? pkg*)
(warning (_ "choosing ~a from ~a~%")
(package-full-name pkg)
(location->string (package-location pkg))))
+ (when fallback?
+ (warning (_ "deprecated NAME-VERSION syntax.~%")))
pkg)
(_
(if version
(leave (_ "~A: package not found for version ~a~%") name version)
- (leave (_ "~A: unknown package~%") name)))))
+ (or fallback?
+ ;; XXX: Fallback to the older specification style with an hyphen
+ ;; between NAME and VERSION, for backward compatibility.
+ (let ((proc (@ (guix build utils) package-name->name+version)))
+ (call-with-values (proc name)
+ (cut %find-package spec <> <> #:fallback? #t)))
+ (leave (_ "~A: unknown package~%") name))))))
(define (specification->package spec)
"Return a package matching SPEC. SPEC may be a package name, or a package
-name followed by a hyphen and a version number. If the version number is not
+name followed by an at-sign and a version number. If the version number is not
present, return the preferred newest version."
(let-values (((name version) (package-name->name+version spec)))
(%find-package spec name version)))
optionally contain a version number and an output name, as in these examples:
guile
- guile-2.0.9
+ guile@2.0.9
guile:debug
- guile-2.0.9:debug
+ guile@2.0.9:debug
If SPEC does not specify a version number, return the preferred newest
version; if SPEC does not specify an output, return OUTPUT."