gh-84232: Fix pydoc docs.python.org link generation

.gitattributes

@@ -83,6 +83,8 @@ Include/opcode_ids.h                                generated
 Include/token.h                                     generated
 Lib/_opcode_metadata.py                             generated
 Lib/keyword.py                                      generated
+Lib/pydoc_data/topics.py                            generated
+Lib/pydoc_data/module_docs.py                       generated
 Lib/test/certdata/*.pem                             generated
 Lib/test/certdata/*.0                               generated
 Lib/test/levenshtein_examples.json                  generated

Doc/Makefile

@@ -140,7 +140,8 @@ doctest:
 pydoc-topics: BUILDER = pydoc-topics
 pydoc-topics: build
 	@echo "Building finished; now run this:" \
-	      "cp build/pydoc-topics/topics.py ../Lib/pydoc_data/topics.py"
+	      "cp build/pydoc-topics/topics.py ../Lib/pydoc_data/topics.py" \
+	      "&& cp build/pydoc-topics/module_docs.py ../Lib/pydoc_data/module_docs.py"
 
 .PHONY: gettext
 gettext: BUILDER = gettext

Doc/tools/extensions/pydoc_topics.py

@@ -109,6 +109,7 @@ class PydocTopicsBuilder(TextBuilder):
     def init(self) -> None:
         super().init()
         self.topics: dict[str, str] = {}
+        self.module_docs: dict[str, str] = {}
 
     def get_outdated_docs(self) -> str:
         # Return a string describing what an update build will build.
@@ -130,6 +131,15 @@ def write_documents(self, _docnames: Set[str]) -> None:
                 continue
             doc_labels.setdefault(docname, []).append((topic_label, label_id))
 
+        py_domain = env.domains['py']
+        for module_name, module_info in py_domain.data['modules'].items():
+            docname = module_info[0]
+            if docname.startswith('library/'):
+                doc_file = docname.replace('library/', '')
+                self.module_docs[module_name] = (
+                    doc_file + f"#module-{module_name}"
+                )
+
         for docname, label_ids in status_iterator(
             doc_labels.items(),
             "building topics... ",
@@ -161,6 +171,22 @@ def finish(self) -> None:
 """
         self.outdir.joinpath("topics.py").write_text(topics, encoding="utf-8")
 
+        module_docs_repr = "\n".join(
+            f"    '{module}': '{doc_file}',"
+            for module, doc_file in sorted(self.module_docs.items())
+        )
+        module_docs = f"""\
+# Autogenerated by Sphinx on {asctime()}
+# as part of the release process.
+
+module_docs = {{
+{module_docs_repr}
+}}
+"""
+        self.outdir.joinpath("module_docs.py").write_text(
+            module_docs, encoding="utf-8"
+        )
+
 
 def _display_labels(item: tuple[str, Sequence[tuple[str, str]]]) -> str:
     _docname, label_ids = item

Lib/pydoc.py

@@ -579,10 +579,20 @@ def getdocloc(self, object, basedir=sysconfig.get_path('stdlib')):
              (file.startswith(basedir) and
               not file.startswith(os.path.join(basedir, 'site-packages')))) and
             object.__name__ not in ('xml.etree', 'test.test_pydoc.pydoc_mod')):
-            if docloc.startswith(("http://", "https://")):
-                docloc = "{}/{}.html".format(docloc.rstrip("/"), object.__name__.lower())
+
+            try:
+                from pydoc_data import module_docs
+            except ImportError:
+                module_docs = None
+
+            if object.__name__ in module_docs.module_docs:
+                doc_name = module_docs.module_docs[object.__name__]
+                if docloc.startswith(("http://", "https://")):
+                    docloc = "{}/{}".format(docloc.rstrip("/"), doc_name)
+                else:
+                    docloc = os.path.join(docloc, doc_name)
             else:
-                docloc = os.path.join(docloc, object.__name__.lower() + ".html")
+                docloc = None
         else:
             docloc = None
         return docloc