Currently getting this error building the latest version - as in the
Debian git package.

Possibly this is because we depend on a package that needs updating -
mostly likely mkdocs or jinja2 - but wonder which one?  Maybe we should
just update both anyway.

# Build the HTML documentation.
mkdir /<<PKGBUILDDIR>>/docs.debian
LC_ALL=C.UTF-8 PYTHONPATH=/usr/share/mkdocs/themes mkdocs build && mv site 
docs.debian/html
INFO    -  Building documentation to directory: /<<PKGBUILDDIR>>/site 
Traceback (most recent call last):
  File "/usr/bin/mkdocs", line 9, in <module>
    load_entry_point('mkdocs==0.15.3', 'console_scripts', 'mkdocs')()
  File "/usr/lib/python3/dist-packages/click/core.py", line 716, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/click/core.py", line 696, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3/dist-packages/click/core.py", line 1060, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/lib/python3/dist-packages/click/core.py", line 889, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3/dist-packages/click/core.py", line 534, in invoke
    return callback(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/mkdocs/__main__.py", line 137, in 
build_command
    ), clean_site_dir=clean)
  File "/usr/lib/python3/dist-packages/mkdocs/commands/build.py", line 290, in 
build
    build_pages(config)
  File "/usr/lib/python3/dist-packages/mkdocs/commands/build.py", line 234, in 
build_pages
    build_template('404.html', env, config, site_navigation)
  File "/usr/lib/python3/dist-packages/mkdocs/commands/build.py", line 149, in 
build_template
    output_content = template.render(context)
  File "/usr/lib/python3/dist-packages/jinja2/environment.py", line 1008, in 
render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/lib/python3/dist-packages/jinja2/environment.py", line 780, in 
handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/lib/python3/dist-packages/jinja2/_compat.py", line 37, in reraise
    raise value.with_traceback(tb)
  File "/<<PKGBUILDDIR>>/docs_theme/404.html", line 1, in top-level template 
code
    {% extends "main.html" %}
  File "/<<PKGBUILDDIR>>/docs_theme/main.html", line 7, in top-level template 
code
    <title>{% if page.title %}{{ page.title }} - {% endif %}{{ config.site_name 
}}</title>
  File "/usr/lib/python3/dist-packages/jinja2/environment.py", line 430, in 
getattr
    return getattr(obj, attribute)
jinja2.exceptions.UndefinedError: 'page' is undefined

-- 
Brian May <b...@debian.org>

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