Add step to update sgl-kernel whl index (#3110)

scripts/update_kernel_whl_index.py

@@ -0,0 +1,16 @@
+# Reference: https://github.com/flashinfer-ai/flashinfer/blob/v0.2.0/scripts/update_whl_index.py
+
+import hashlib
+import pathlib
+import re
+
+for path in sorted(pathlib.Path("sgl-kernel/dist").glob("*.whl")):
+    with open(path, "rb") as f:
+        sha256 = hashlib.sha256(f.read()).hexdigest()
+    ver = re.findall(r"sgl_kernel-([0-9.]+(?:\.post[0-9]+)?)-", path.name)[0]
+    index_dir = pathlib.Path(f"sgl-whl/cu118")
+    index_dir.mkdir(exist_ok=True)
+    base_url = "https://github.com/sgl-project/whl/releases/download"
+    full_url = f"{base_url}/v{ver}/{path.name}#sha256={sha256}"
+    with (index_dir / "index.html").open("a") as f:
+        f.write(f'<a href="{full_url}">{path.name}</a><br>\n')