Added a CVE role for Sphinx.

docs/_ext/cve_role.py

@@ -0,0 +1,27 @@
+"""
+An interpreted text role to link docs to CVE issues. To use: :cve:`XXXXX`
+"""
+from docutils import nodes, utils
+from docutils.parsers.rst import roles
+
+
+def cve_role(name, rawtext, text, lineno, inliner, options=None, content=None):
+    if options is None:
+        options = {}
+
+    url_pattern = inliner.document.settings.env.app.config.cve_url
+    if url_pattern is None:
+        msg = inliner.reporter.warning("cve not configured: please configure cve_url in conf.py")
+        prb = inliner.problematic(rawtext, rawtext, msg)
+        return [prb], [msg]
+
+    url = url_pattern % text
+    roles.set_classes(options)
+    node = nodes.reference(rawtext, utils.unescape('CVE-%s' % text), refuri=url, **options)
+    return [node], []
+
+
+def setup(app):
+    app.add_config_value('cve_url', None, 'env')
+    app.add_role('cve', cve_role)
+    return {'parallel_read_safe': True}