feat: add sphinx-sitemap dependency and configuration for sitemap generation

docs/pyproject.toml

@@ -10,4 +10,5 @@ dependencies = [
   "maturin>=1.14.1,<2",
   "jinja2>=3.1.6,<4",
   "setuptools>=84.0.0,<85",
+  "sphinx-sitemap>=2.9.0,<3",
 ]

docs/source/conf.py

@@ -55,6 +55,7 @@
     "myst_parser",
     "sphinx_reredirects",
     "rustdoc_trim",
+    "sphinx_sitemap",
 ]
 
 source_suffix = {
@@ -89,8 +90,8 @@
 
 html_theme_options = {
      "logo": {
-        "image_light": "_static/images/original.svg", 
-        "image_dark": "_static/images/original_dark.svg", 
+        "image_light": "_static/images/original.svg",
+        "image_dark": "_static/images/original_dark.svg",
     },
     "use_edit_page_button": True,
     "navbar_center": [],
@@ -113,6 +114,18 @@
 # resolve at the conventional URL `https://datafusion.apache.org/llms.txt`.
 html_extra_path = ["llms.txt"]
 
+# Base URL of the published site. Required by sphinx-sitemap to build
+# absolute <loc> entries in the generated sitemap.xml.
+html_baseurl = "https://datafusion.apache.org/"
+
+# The site is published as a single flat, single-language tree (see
+# .github/workflows/docs.yaml, which rsyncs docs/build/html/ straight to the
+# site root) — there is no /en/ or version path segment. Override
+# sphinx-sitemap's default "{lang}{version}{link}" scheme, which assumes a
+# Read the Docs-style multi-language/multi-version layout, so <loc> entries
+# match the real URLs instead of a nonexistent /en/... prefix.
+sitemap_url_scheme = "{link}"
+
 html_logo = "_static/images/2x_bgwhite_original.png"
 
 html_css_files = ["theme_overrides.css"]