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Bug 175880 - Yelp fails to open any docbook files, with error "An unknown error occured There is no default action associated with this location."
Summary: Yelp fails to open any docbook files, with error "An unknown error occured T...
Alias: None
Product: Fedora
Classification: Fedora
Component: yelp
Version: rawhide
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Dave Malcolm
QA Contact:
Depends On:
Blocks: FC5Target
TreeView+ depends on / blocked
Reported: 2005-12-15 22:08 UTC by Dave Malcolm
Modified: 2007-11-30 22:11 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2005-12-20 04:51:50 UTC

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
GNOME Bugzilla 324926 None None None Never

Description Dave Malcolm 2005-12-15 22:08:30 UTC
Description of problem:
Yelp seems to be totally broken; any attempt to open an xml help file fails

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.  Click on Desktop/System menu -> Help, or run "yelp" from terminal
2.  See "Help Topics", click on e.g. Desktop
3.  Mouseover "User Guide", then click it.
Actual results:
mouseover shows a local URL of an xml file, of the form
Clicking on it brings up an error dialog:
bold text "An unknown error occured"
extra text: "There is no default action associated with this location."

Expected results:
It should open the help file.

Comment 1 Dave Malcolm 2005-12-15 22:10:38 UTC
Confirmed on another machine, with yelp-2.13.1-1

Comment 2 Dave Malcolm 2005-12-15 23:51:48 UTC
It's doing a gnome_url_show on the URL, which internally calls
gnome_vfs_url_show_with_env, which appears to be returning

Comment 3 Dave Malcolm 2005-12-15 23:59:24 UTC
Looking in Nautilus at a typical file:

It's reported as having mimetype:

Open With tab gives no applications selected for handling files of type DocBook

Comment 4 Dave Malcolm 2005-12-16 00:11:47 UTC
Looks like Yelp should be registered as a handler for DocBook files. (from upstream tarball) doesn't include any mime types, and
neither does the generated yelp.desktop (in the resulting rpm) 

for related packaging notes for the specfile.

Comment 5 Dave Malcolm 2005-12-16 16:46:02 UTC
That doesn't fix it, and running 
yelp /usr/share/gnome/help/user-guide/C/user-guide.xml
also fails (yelp tries to spawn an external progam, and if it's registered to
handle docbook, spawns itself in a loop)

Looks like get_doc_type doesn't recognize the new mimetype for DocBook, and is
returning YELP_DOC_TYPE_EXTERNAL; I'll patch this for our packages and send it

Comment 6 Dave Malcolm 2005-12-16 17:08:56 UTC
Hmmm.. nautilus is reporting it as "application/docbook+xml", but inside yelp,
gnome_vfs_get_mime_type is reporting it as "application/xml".  (slow vs fast
mime sniffing?)  I'll patch it so that yelp can survive either...

Comment 7 Dave Malcolm 2005-12-16 17:24:45 UTC
Grrr... at least it can start loading the user guide now, but gives an error
dialog generating the HTML:

Could not process document

The document â/usr/share/gnome/help/user-guide/C/user-guide.xmlâ could not be
processed. The file â/usr/share/yelp/xslt/db2html.xslâ is either missing, or it
is not a valid XSLT stylesheet.

On starting from a terminal we get some extra debug output:
I/O warning : failed to load external entity "/usr/share/xml/gnome/xslt/d
compilation error: file /usr/share/xml/gnome/xslt/docbook/html/db2html.xsl line
45 element include
xsl:include : unable to load

Comment 8 Dave Malcolm 2005-12-16 17:26:24 UTC
Seems to affect all documentation, not just the user guide...

Comment 9 Dave Malcolm 2005-12-16 19:28:59 UTC
This was with gnome-doc-utils-0.5.1-1; db2html-bibliography.xsl is indeed
referenced but not installed (the various other stylesheets are) 

Comment 10 Dave Malcolm 2005-12-16 19:34:13 UTC
Looks like this was fixed 2 weeks ago in the upstream and we need a
new upstream tarball of gnome-doc-utils:

Comment 11 Dave Malcolm 2005-12-16 19:48:37 UTC
I've filed the gnome-doc-utils problem here:

Building with the fix for the mimetype problem into rawhide as yelp-2.13.2-2 

Comment 12 Dave Malcolm 2005-12-16 20:15:47 UTC
Sent upstream (with patch) here:

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