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derivations: Distinguish direct store paths from files within a store path.

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* guix/derivations.scm (derivation)[direct-store-path?]: New procedure.
  Use it to determine which inputs must be added to the store.
This commit is contained in:
Ludovic Courtès 2012-12-10 00:44:17 +01:00
parent 3259877d35
commit 200dc93761
1 changed files with 11 additions and 2 deletions
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13
guix/derivations.scm
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@ -364,6 +364,15 @@ the derivation called NAME with hash HASH."
store path and <derivation> object. When HASH, HASH-ALGO, and HASH-MODE
are given, a fixed-output derivation is created---i.e., one whose result is
known in advance, such as a file download."
(define direct-store-path?
(let ((len (+ 1 (string-length (%store-prefix)))))
(lambda (p)
;; Return #t if P is a store path, and not a sub-directory of a
;; store path. This predicate is needed because files *under* a
;; store path are not valid inputs.
(and (store-path? p)
(not (string-index (substring p len) #\/))))))
(define (add-output-paths drv)
;; Return DRV with an actual store path for each of its output and the
;; corresponding environment variable.
@ -411,9 +420,9 @@ known in advance, such as a file download."
(make-derivation-output "" hash-algo hash)))
outputs))
(inputs (map (match-lambda
(((? store-path? input))
(((? direct-store-path? input))
(make-derivation-input input '("out")))
(((? store-path? input) sub-drvs ...)
(((? direct-store-path? input) sub-drvs ...)
(make-derivation-input input sub-drvs))
((input . _)
(let ((path (add-to-store store