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packages: Micro-optimize `package-derivation'. 

* guix/packages.scm (package-derivation): Move `cache' call before the
  traversal of PACKAGE's inputs.
This commit is contained in:
Ludovic Courtès 2012-10-08 21:57:14 +02:00
parent df7bbd3813
commit ead1f1086d
1 changed files with 47 additions and 45 deletions
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92
guix/packages.scm
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@ -221,52 +221,54 @@ recursively."
#:optional (system (%current-system)))
"Return the derivation of PACKAGE for SYSTEM."
(or (cached-derivation package system)
(match package
(($ <package> name version source (= build-system-builder builder)
args inputs propagated-inputs native-inputs self-native-input?
outputs)
;; TODO: For `search-paths', add a builder prologue that calls
;; `set-path-environment-variable'.
(let ((inputs (map (match-lambda
(((? string? name) (? package? package))
(list name (package-derivation store package)))
(((? string? name) (? package? package)
(? string? sub-drv))
(list name (package-derivation store package)
sub-drv))
(((? string? name)
(and (? string?) (? derivation-path?) drv))
(list name drv))
(((? string? name)
(and (? string?) (? file-exists? file)))
;; Add FILE to the store. When FILE is in the
;; sub-directory of a store path, it needs to be
;; added anyway, so it can be used as a source.
(list name
(add-to-store store (basename file)
#t #f "sha256" file)))
(((? string? name) (? origin? source))
(list name
(package-source-derivation store source)))
(x
(raise (condition (&package-input-error
(package package)
(input x))))))
(package-transitive-inputs package))))
;; Compute the derivation and cache the result. Caching is
;; important because some derivations, such as the implicit inputs
;; of the GNU build system, will be queried many, many times in a
;; row.
(cache package system
(apply builder
store (package-full-name package)
(and source (package-source-derivation store source))
inputs
#:outputs outputs #:system system
(if (procedure? args)
(args system)
args))))))))
;; Compute the derivation and cache the result. Caching is
;; important because some derivations, such as the implicit inputs
;; of the GNU build system, will be queried many, many times in a
;; row.
(cache
package system
(match package
(($ <package> name version source (= build-system-builder builder)
args inputs propagated-inputs native-inputs self-native-input?
outputs)
;; TODO: For `search-paths', add a builder prologue that calls
;; `set-path-environment-variable'.
(let ((inputs (map (match-lambda
(((? string? name) (? package? package))
(list name (package-derivation store package)))
(((? string? name) (? package? package)
(? string? sub-drv))
(list name (package-derivation store package)
sub-drv))
(((? string? name)
(and (? string?) (? derivation-path?) drv))
(list name drv))
(((? string? name)
(and (? string?) (? file-exists? file)))
;; Add FILE to the store. When FILE is in the
;; sub-directory of a store path, it needs to be
;; added anyway, so it can be used as a source.
(list name
(add-to-store store (basename file)
#t #f "sha256" file)))
(((? string? name) (? origin? source))
(list name
(package-source-derivation store source)))
(x
(raise (condition (&package-input-error
(package package)
(input x))))))
(package-transitive-inputs package))))
(apply builder
store (package-full-name package)
(and source (package-source-derivation store source))
inputs
#:outputs outputs #:system system
(if (procedure? args)
(args system)
args))))))))
(define* (package-cross-derivation store package)
;; TODO