From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Thompson <dthompson2@worcester.edu>
Subject: Re: Invalid nar signature
Date: Mon, 15 Dec 2014 17:49:53 -0500
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: guix-devel <guix-devel@gnu.org>

Ludovic Court=C3=A8s <ludo@gnu.org> writes:

> To produce that, use =E2=80=98write-file=E2=80=99 from (guix serializatio=
n):
>
> --8<---------------cut here---------------start------------->8---
> $ ./pre-inst-env guile -c '(use-modules (guix serialization)) (write-file=
 "/gnu/store/wy70n5zk8qinxjz0wdk9q2hh1zjfb32j-miscfiles-1.5" (current-outpu=
t-port))' > t.nar
> $ ./pre-inst-env guile -c '(use-modules (guix serialization)) (call-with-=
input-file "t.nar" (lambda (port) (restore-file port "restored")))'
> $ ls restored/
> share
> --8<---------------cut here---------------end--------------->8---

The above snippet works.  However, 'guix substitute-binary' throws the
following error:

  guix substitute-binary: error: invalid nar end-of-file marker

Here's my nar rendering code:

  (define (render-nar store-item)
    "Render archive of the store path corresponding to STORE-ITEM."
    (let ((store-path (string-append %store-directory "/" store-item)))
      (values '((content-type . (text/x-nix-archive)))
              (lambda (port)
                (write-file store-path port)))))

Thoughts?

--=20
David Thompson
Web Developer - Free Software Foundation - http://fsf.org
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