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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: Wed, 16 Jul 2014 11:23:12 +0200
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In-Reply-To: <20140715214338.GB16482@jocasta.intra> (John Darrington's message
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To: John Darrington <john@darrington.wattle.id.au>
Cc: guix-devel@gnu.org, John Darrington <jmd@gnu.org>

John Darrington <john@darrington.wattle.id.au> skribis:

> On Tue, Jul 15, 2014 at 10:59:17PM +0200, Ludovic Court??s wrote:

[...]

>      The problem is that ???search-path-specification??? is meant for $PA=
TH-like
>      variables that list directories, not files.
>
> That occurred to me too.  But what problems does it actually cause?

That we can=E2=80=99t use it for $XML_CATALOG_FILES.

>      So I see two solutions:
>=20=20=20=20=20=20
>        1. Patch libxml2 so that it honors a new variable, say
>           $XML_CATALOG_DIRECTORIES, which would allow us to use
>           ???search-path-specification???.
>=20=20=20=20=20=20
>        2. Augment support for search paths to allow file-based search pat=
hs.
>=20=20=20=20=20=20
>      (2) may be best in the long run, but it has ramifications in differe=
nt
>      places.
>=20=20=20=20=20=20
>
> (1) seems like a good idea only if upstream can be persuaded to adopt it.

Which is unlikely, given that it=E2=80=99s redundant with $XML_CATALOG_FILE=
S.

> What are the ramifications of (2) ?

There are changes in the build tools, for instance =E2=80=98search-path-as-=
list=E2=80=99
(used by =E2=80=98set-path-environment-variable=E2=80=99, used in gnu-build=
-system.scm)
expects directories, not files.  And all this calls things
=E2=80=98directories=E2=80=99.

This is a change we could schedule for the next core-updates.

WDYT?

Ludo=E2=80=99.