Add support for sphinx dirhtml builder

Author: sitic

src/sphinx_codeautolink/extension/__init__.py

@@ -89,7 +89,7 @@ def __init__(self) -> None:
     @print_exceptions()
     def build_inited(self, app) -> None:
         """Handle initial setup."""
-        if app.builder.name != "html":
+        if app.builder.name not in ("html", "dirhtml"):
             self.do_nothing = True
             return
 
@@ -289,6 +289,7 @@ def apply_links(self, app, exception) -> None:
                 self.inventory,
                 self.custom_blocks,
                 self.search_css_classes,
+                builder_name=app.builder.name,
             )
 
         self.cache.write()

src/sphinx_codeautolink/extension/block.py

@@ -375,9 +375,14 @@ def link_html(
     inventory: dict,
     custom_blocks: dict,
     search_css_classes: list,
+    builder_name: str = "html",
 ) -> None:
     """Inject links to code blocks on disk."""
-    html_file = Path(out_dir) / (document + ".html")
+    if builder_name == "dirhtml" and Path(document).name != "index":
+        html_file = Path(out_dir) / document / "index.html"
+    else:
+        html_file = Path(out_dir) / (document + ".html")
+
     text = html_file.read_text("utf-8")
     soup = BeautifulSoup(text, "html.parser")