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import: cpan: Change %corelist into a promise.

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Fixes compilation failures in 'guix pull'.

* guix/import/cpan.scm (%corelist): Change it to a promise by wrapping it with
  'delay'.
  (cpan-module->sexp): Adapt uses of %corelist by wrapping with 'force'.
This commit is contained in:
Mark H Weaver 2015-02-20 16:20:38 -05:00
parent 2f4646b6f6
commit 431b28d9dc
1 changed files with 10 additions and 8 deletions
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18
guix/import/cpan.scm
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@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -98,12 +99,13 @@ or #f on failure. MODULE should be e.g. \"Test::Script\""
(string-append "http://search.cpan.org/dist/" name))
(define %corelist
(let* ((perl (with-store store
(derivation->output-path
(package-derivation store perl))))
(core (string-append perl "/bin/corelist")))
(and (access? core X_OK)
core)))
(delay
(let* ((perl (with-store store
(derivation->output-path
(package-derivation store perl))))
(core (string-append perl "/bin/corelist")))
(and (access? core X_OK)
core))))
(define (cpan-module->sexp meta)
"Return the `package' s-expression for a CPAN module from the metadata in
@ -120,9 +122,9 @@ META."
(assoc-ref meta "version"))
(define (core-module? name)
(and %corelist
(and (force %corelist)
(parameterize ((current-error-port (%make-void-port "w")))
(let* ((corelist (open-pipe* OPEN_READ %corelist name)))
(let* ((corelist (open-pipe* OPEN_READ (force %corelist) name)))
(let loop ((line (read-line corelist)))
(if (eof-object? line)
(begin (close-pipe corelist) #f)