On 06/07/2019 10:46 AM, Eduard Tibet wrote:
BTW, it is extremely rare that anyone ever will face this issue ever.
But anyway I'd like to post it here.
I suggest it is a hidden bug (or just such behavior) of XXE in the
field of custom configuration.
Initial conditions:
1. Imagine you write (or have) your own addon - configuration. And
this addon uses a default XXE addon (configuration), supplied by
default (there is a <requires> element within a custom .xxe_addon).
2. By default this addon is installed by XXE in a XXE installation directory.
3. Configuration uses include statement to include the default addon. I.e.
<include location="xxe-config:docbook51/docbook51.xxe" />
As shown above a setup uses xxe-config get a default configuration
docbook51.xxe within its default path.
But, if by some reasons someone:
- uninstalls the default installed addon (docbook51.xxe in that case)
and installs further it to a user preference directory (by changing
the appropriate settings in "Install addons" section in
"Options|Preferences")
or
- installs custom addon with a default addons in a user preference directory
as a result: a custom configuration will broke because of xxe-config settings.
Are there any workaround to get custom addon functioning (by including
"root" addon) irrespective the path, where "root" used addon is
installed (either in XXE directory, or in user preference directory)?
You are right in saying that this issue is quite unlikely to happen.
However the solution already exists and in fact, you should use it in
your own "DocBook fauthoring addon".
Please do not use:
<include location="xxe-config:docbook51/docbook51.xxe" />
Instead use:
<include location="docbook51-config:docbook51.xxe" />
This works because the directory containing the stock "DocBook v5.1+"
configuration also contains a "catalog.xml" file:
---
<?xml version="1.0" ?>
<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"
prefer="public">
<rewriteURI uriStartString="docbook51-config:" rewritePrefix="." />
</catalog>
---
Therefore the "docbook51-config:" prefix works wherever the stock
"DocBook v5.1+" configuration has been installed.
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