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packages: Add support for system-dependent inputs. 

* guix/packages.scm (package-derivation)[intern]: New procedure.  Pass
  #t as the `recursive?' argument, instead of #f.
  [expand-input]: New procedure, with code formerly in the body.
  Support inputs where the input is a procedure returning a file name or
  an <origin>.
  Use `expand-input' in the body.

* tests/packages.scm ("trivial with system-dependent input"): New test.
This commit is contained in:
Ludovic Courtès 2012-10-21 16:57:50 +02:00
parent 095c7a2683
commit 592ef6c88f
2 changed files with 65 additions and 25 deletions
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71
guix/packages.scm
View File

@ -227,6 +227,51 @@ recursively."
(define* (package-derivation store package
#:optional (system (%current-system)))
"Return the derivation of PACKAGE for SYSTEM."
(define (intern file)
;; Add FILE to the store. Set the `recursive?' bit to #t, so that
;; file permissions are preserved.
(add-to-store store (basename file)
#t #t "sha256" file))
(define expand-input
;; Expand the given input tuple such that it contains only
;; references to derivation paths or store paths.
(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 (intern file)))
(((? string? name) (? origin? source))
(list name (package-source-derivation store source)))
((and i ((? string? name) (? procedure? proc) sub-drv ...))
;; This form allows PROC to make a SYSTEM-dependent choice.
;; XXX: Currently PROC must return a .drv, a store path, a local
;; file name, or an <origin>. If it were allowed to return a
;; package, then `transitive-inputs' and co. would need to be
;; adjusted.
(let ((input (proc system)))
(if (or (string? input) (origin? input))
(expand-input (cons* name input sub-drv))
(raise (condition (&package-input-error
(package package)
(input i)))))))
(x
(raise (condition (&package-input-error
(package package)
(input x)))))))
(or (cached-derivation package system)
;; Compute the derivation and cache the result. Caching is
@ -241,31 +286,7 @@ recursively."
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))))))
(let ((inputs (map expand-input
(package-transitive-inputs package))))
(apply builder

19
tests/packages.scm
View File

@ -95,6 +95,25 @@
(equal? '(hello guix)
(call-with-input-file (string-append p "/test") read))))))
(test-assert "trivial with system-dependent input"
(let* ((p (package (inherit (dummy-package "trivial-system-dependent-input"))
(build-system trivial-build-system)
(source #f)
(arguments
`(#:guile ,%bootstrap-guile
#:builder
(let ((out (assoc-ref %outputs "out"))
(bash (assoc-ref %build-inputs "bash")))
(zero? (system* bash "-c"
(format #f "echo hello > ~a" out))))))
(inputs `(("bash" ,(lambda (system)
(search-bootstrap-binary "bash"
system)))))))
(d (package-derivation %store p)))
(and (build-derivations %store (list d))
(let ((p (pk 'drv d (derivation-path->output-path d))))
(eq? 'hello (call-with-input-file p read))))))
(test-assert "GNU Hello"
(let ((hello (package-with-explicit-inputs hello %bootstrap-inputs
#:guile %bootstrap-guile)))