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snix: Gracefully handle `null' in Nix build inputs.

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* guix/snix.scm (snix-derivation->guix-package)[convert-inputs]:
  Gracefully handle `null' as an input.
This commit is contained in:
Ludovic Courtès 2013-01-07 22:23:50 +01:00
parent 708d0ceb50
commit ab8ed44fce
1 changed files with 13 additions and 10 deletions
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23
guix/snix.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2010, 2011, 2012 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2010, 2011, 2012, 2013 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -366,15 +366,18 @@ location of DERIVATION."
attribute-value)
(#f
'())
((('derivation _ _ (attributes ...)) ...)
(map (lambda (attrs)
(let* ((full-name (attribute-value
(find-attribute-by-name "name" attrs)))
(name (package-name->name+version full-name)))
(list name
(list 'unquote
(string->symbol name)))))
attributes))))
((inputs ...)
;; Inputs can be either derivations or the null value.
(filter-map (match-lambda
(('derivation _ _ (attributes ...))
(let* ((full-name
(attribute-value
(find-attribute-by-name "name" attributes)))
(name (package-name->name+version full-name)))
(list name
(list 'unquote (string->symbol name)))))
('null #f))
inputs))))
(define (maybe-inputs guix-name inputs)
(match inputs