The ReferenceRole class is only available in Sphinx >= 2.0.0, which
makes building BIND 9 documentation impossible with older Sphinx
versions:
Running Sphinx v1.7.6
Configuration error:
There is a programable error in your configuration file:
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/sphinx/config.py", line 161, in __init__
execfile_(filename, config)
File "/usr/lib/python3.6/site-packages/sphinx/util/pycompat.py", line 150, in execfile_
exec_(code, _globals)
File "conf.py", line 21, in <module>
from sphinx.util.docutils import ReferenceRole
ImportError: cannot import name 'ReferenceRole'
Work around the problem by defining a stub version of the ReferenceRole
class if the latter cannot be imported. This allows documentation
(without GitLab hyperlinks in release notes) to be built with older
Sphinx versions.
8f8bbae3fc