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Date:   Sat,  6 Jul 2019 13:28:42 -0300
From:   Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
To:     Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc:     Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...radead.org>,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>
Subject: [PATCH] docs: automarkup.py: ignore exceptions when seeking for xrefs

When using the automarkup extension with:
	make pdfdocs

without passing an specific book, the code will raise an exception:

	  File "/devel/v4l/docs/Documentation/sphinx/automarkup.py", line 86, in auto_markup
	    node.parent.replace(node, markup_funcs(name, app, node))
	  File "/devel/v4l/docs/Documentation/sphinx/automarkup.py", line 59, in markup_funcs
	    'function', target, pxref, lit_text)
	  File "/devel/v4l/docs/sphinx_2.0/lib/python3.7/site-packages/sphinx/domains/c.py", line 308, in resolve_xref
	    contnode, target)
	  File "/devel/v4l/docs/sphinx_2.0/lib/python3.7/site-packages/sphinx/util/nodes.py", line 450, in make_refnode
	    '#' + targetid)
	  File "/devel/v4l/docs/sphinx_2.0/lib/python3.7/site-packages/sphinx/builders/latex/__init__.py", line 159, in get_relative_uri
	    return self.get_target_uri(to, typ)
	  File "/devel/v4l/docs/sphinx_2.0/lib/python3.7/site-packages/sphinx/builders/latex/__init__.py", line 152, in get_target_uri
	    raise NoUri
	sphinx.environment.NoUri

This happens because not all references will belong to a single
PDF/LaTeX document.

Better to just ignore those than breaking Sphinx build.

Fixes: d74b0d31ddde ("Docs: An initial automarkup extension for sphinx")
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
---
 Documentation/sphinx/automarkup.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Documentation/sphinx/automarkup.py b/Documentation/sphinx/automarkup.py
index b300cf129869..dba14374f269 100644
--- a/Documentation/sphinx/automarkup.py
+++ b/Documentation/sphinx/automarkup.py
@@ -55,8 +55,13 @@ def markup_funcs(docname, app, node):
                                           reftype = 'function',
                                           reftarget = target, modname = None,
                                           classname = None)
-            xref = cdom.resolve_xref(app.env, docname, app.builder,
-                                     'function', target, pxref, lit_text)
+
+            # When building pdf documents, this may raise a NoUri exception
+            try:
+                xref = cdom.resolve_xref(app.env, docname, app.builder,
+                                         'function', target, pxref, lit_text)
+            except:
+                xref = None
         #
         # Toss the xref into the list if we got it; otherwise just put
         # the function text.
-- 
2.21.0

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