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guix download: Gracefully handle missing arguments.

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Fixes <http://bugs.gnu.org/21991>.
Reported by Jan Synáček <jan.synacek@gmail.com>.

* guix/scripts/download.scm (guix-download): Call 'leave' when OPTS does
not contain an 'argument' key.
This commit is contained in:
Ludovic Courtès 2015-11-23 17:32:02 +01:00
parent bbee7bd765
commit 71ae18ee52
1 changed files with 3 additions and 2 deletions
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5
guix/scripts/download.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2012, 2013, 2015 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -102,7 +102,8 @@ (define (parse-options)
(with-error-handling
(let* ((opts (parse-options))
(store (open-connection))
(arg (assq-ref opts 'argument))
(arg (or (assq-ref opts 'argument)
(leave (_ "no download URI was specified~%"))))
(uri (or (string->uri arg)
(leave (_ "~a: failed to parse URI~%")
arg)))