Apply a Sphinx transform to make the core module docs look better

Author: ciscorn

conf.py

@@ -17,14 +17,16 @@
 #
 # SPDX-License-Identifier: MIT
 
-import json
 import logging
 import os
 import subprocess
 import sys
 import urllib.parse
 
 import recommonmark
+from sphinx.transforms import SphinxTransform
+from docutils import nodes
+from sphinx import addnodes
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -84,6 +86,7 @@
 autoapi_add_toctree_entry = False
 autoapi_options = ['members', 'undoc-members', 'private-members', 'show-inheritance', 'special-members', 'show-module-summary']
 autoapi_template_dir = 'docs/autoapi/templates'
+autoapi_python_class_content = "both"
 autoapi_python_use_implicit_namespaces = True
 autoapi_root = "shared-bindings"
 
@@ -423,7 +426,38 @@ def generate_redirects(app):
             with open(redirected_filename, 'w') as f:
                 f.write(TEMPLATE % urllib.parse.quote(to_path, '#/'))
 
+
+class CoreModuleTransform(SphinxTransform):
+    default_priority = 870
+
+    def _convert_first_paragraph_into_title(self):
+        title = self.document.next_node(nodes.title)
+        paragraph = self.document.next_node(nodes.paragraph)
+        if not title or not paragraph:
+            return
+        if isinstance(paragraph[0], nodes.paragraph):
+            paragraph = paragraph[0]
+        if all(isinstance(child, nodes.Text) for child in paragraph.children):
+            for child in paragraph.children:
+                title.append(nodes.Text(" \u2013 "))
+                title.append(child)
+            paragraph.parent.remove(paragraph)
+
+    def _enable_linking_to_nonclass_targets(self):
+        for desc in self.document.traverse(addnodes.desc):
+            for xref in desc.traverse(addnodes.pending_xref):
+                if xref.attributes.get("reftype") == "class":
+                    xref.attributes.pop("refspecific", None)
+
+    def apply(self, **kwargs):
+        docname = self.env.docname
+        if docname.startswith(autoapi_root) and docname.endswith("/index"):
+            self._convert_first_paragraph_into_title()
+            self._enable_linking_to_nonclass_targets()
+
+
 def setup(app):
     app.add_css_file("customstyle.css")
     app.add_config_value('redirects_file', 'redirects', 'env')
     app.connect('builder-inited', generate_redirects)
+    app.add_transform(CoreModuleTransform)

docs/requirements.txt

@@ -1,4 +1,4 @@
-sphinx<3
+sphinx<4
 recommonmark==0.6.0
 sphinxcontrib-svg2pdfconverter==0.1.0
 astroid

shared-bindings/help.rst

@@ -22,7 +22,7 @@
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.
 
-:func:`help` - Built-in method to provide helpful information
+:func:`help` -- Built-in method to provide helpful information
 ==============================================================
 
 .. function:: help(object=None)