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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH 5/6] gnu: Enable gnome-doc-utils tests
Date: Tue, 15 Jul 2014 22:59:17 +0200
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In-Reply-To: <1405449096-29230-5-git-send-email-jmd@gnu.org> (John
	Darrington's message of "Tue, 15 Jul 2014 20:31:35 +0200")
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To: John Darrington <jmd@gnu.org>
Cc: guix-devel@gnu.org

John Darrington <jmd@gnu.org> skribis:

> * gnu/packages/gnome (gnome-doc-utils): Set the XML_CATALOG_FILES variabl=
e and
>   enable the tests.

OK to push for now, but:

> +    (arguments
> +     `(#:phases
> +       (alist-cons-before
> +        'check 'pre-check
> +        (lambda* (#:key inputs #:allow-other-keys #:rest args)
> +          ;; This is needed, because without it, xmlint etc tries
> +          ;; to download docbookx.dtd from the net
> +          (setenv "XML_CATALOG_FILES"=20
> +                  (string-append (assoc-ref inputs "docbook-xml")=20
> +                                 "/xml/dtd/docbook/catalog.xml")))
> +        %standard-phases)))
>      (native-inputs
>       `(("intltool" ,intltool)
> +       ("docbook-xml" ,docbook-xml-4.4)

We can=E2=80=99t copy that around forever.

The problem is that =E2=80=98search-path-specification=E2=80=99 is meant fo=
r $PATH-like
variables that list directories, not files.

So I see two solutions:

  1. Patch libxml2 so that it honors a new variable, say
     $XML_CATALOG_DIRECTORIES, which would allow us to use
     =E2=80=98search-path-specification=E2=80=99.

  2. Augment support for search paths to allow file-based search paths.

(2) may be best in the long run, but it has ramifications in different
places.

Thoughts?

Ludo=E2=80=99.