docs: generate table for document loaders (#22871)

Co-authored-by: Bagatur <baskaryan@gmail.com>

docs/Makefile

@@ -38,6 +38,8 @@ generate-files:
 
 	$(PYTHON) scripts/model_feat_table.py $(INTERMEDIATE_DIR)
 
+	$(PYTHON) scripts/document_loader_feat_table.py $(INTERMEDIATE_DIR)
+
 	$(PYTHON) scripts/copy_templates.py $(INTERMEDIATE_DIR)
 
 	wget -q https://raw.githubusercontent.com/langchain-ai/langserve/main/README.md -O $(INTERMEDIATE_DIR)/langserve.md

docs/scripts/document_loader_feat_table.py

@@ -0,0 +1,77 @@
+import sys
+from pathlib import Path
+
+from langchain_community import document_loaders
+from langchain_core.document_loaders.base import BaseLoader
+
+DOCUMENT_LOADER_TEMPLATE = """\
+---
+sidebar_position: 0
+sidebar_class_name: hidden
+keywords: [compatibility]
+custom_edit_url:
+hide_table_of_contents: true
+---
+
+# Document loaders
+
+## Features
+
+The following table shows the feature support for all document loaders.
+
+{table}
+
+"""
+
+
+def get_document_loader_table() -> str:
+    """Get the table of document loaders."""
+
+    doc_loaders_feat_table = {}
+    for cm in document_loaders.__all__:
+        doc_loaders_feat_table[cm] = {}
+        cls = getattr(document_loaders, cm)
+        if issubclass(cls, BaseLoader):
+            for feat in ("aload", "alazy_load", ("lazy_load", "lazy_loading")):
+                if isinstance(feat, tuple):
+                    feat, name = feat
+                else:
+                    feat, name = feat, feat
+                doc_loaders_feat_table[cm][name] = getattr(cls, feat) != getattr(
+                    BaseLoader, feat
+                )
+            native_async = (
+                doc_loaders_feat_table[cm]["aload"]
+                or doc_loaders_feat_table[cm]["alazy_load"]
+            )
+            del doc_loaders_feat_table[cm]["aload"]
+            del doc_loaders_feat_table[cm]["alazy_load"]
+            doc_loaders_feat_table[cm]["native_async"] = native_async
+            doc_loaders_feat_table[cm]["description"] = (cls.__doc__ or "").split("\n")[
+                0
+            ]
+
+    header = ["loader", "description", "lazy_loading", "native_async"]
+    title = ["Document Loader", "Description", "Lazy loading", "Native async support"]
+    rows = [title, [":-"] + [":-:"] * (len(title) - 1)]
+    for loader, feats in sorted(doc_loaders_feat_table.items()):
+        if not feats:
+            continue
+        rows += [
+            [loader, feats["description"]]
+            + ["✅" if feats.get(h) else "❌" for h in header[2:]]
+        ]
+    return "\n".join(["|".join(row) for row in rows])
+
+
+if __name__ == "__main__":
+    output_dir = Path(sys.argv[1])
+    output_integrations_dir = output_dir / "integrations"
+    output_integrations_dir_doc_loaders = output_integrations_dir / "document_loaders"
+    output_integrations_dir_doc_loaders.mkdir(parents=True, exist_ok=True)
+
+    document_loader_page = DOCUMENT_LOADER_TEMPLATE.format(
+        table=get_document_loader_table()
+    )
+    with open(output_integrations_dir / "document_loaders" / "index.mdx", "w") as f:
+        f.write(document_loader_page)

docs/sidebars.js

@@ -184,8 +184,8 @@ module.exports = {
             },
           ],
           link: {
-            type: "generated-index",
-            slug: "integrations/document_loaders",
+            type: "doc",
+            id: "integrations/document_loaders/index",
           },
         },
         {