Add release workflow for sgl-deep-gemm wheels (#24348)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/update_deepgemm_whl_index.py

@@ -0,0 +1,45 @@
+# Generates a PEP 503 simple index for sgl-deep-gemm wheels under
+# sgl-whl/cu<version>/sgl-deep-gemm/index.html. Mirrors the layout used by
+# update_kernel_whl_index.py so consumers can `pip install
+# sgl-deep-gemm --extra-index-url https://...whl/cu129`.
+
+import argparse
+import hashlib
+import pathlib
+import re
+
+SUPPORTED_CUDA_VERSIONS = ["129", "130"]
+
+
+def update_wheel_index(cuda_version, wheel_dir):
+    index_dir = pathlib.Path(f"sgl-whl/cu{cuda_version}/sgl-deep-gemm")
+    index_dir.mkdir(exist_ok=True, parents=True)
+    base_url = "https://github.com/sgl-project/whl/releases/download"
+
+    suffix = f"+cu{cuda_version}"
+    for path in sorted(pathlib.Path(wheel_dir).glob("*.whl")):
+        if suffix not in path.name:
+            continue
+        with open(path, "rb") as f:
+            sha256 = hashlib.sha256(f.read()).hexdigest()
+        match = re.match(r"sgl_deep_gemm-([0-9][^-+]*)(?:\+cu[0-9]+)?-", path.name)
+        if not match:
+            continue
+        ver = match.group(1)
+        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')
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--cuda", type=str, required=True, choices=SUPPORTED_CUDA_VERSIONS
+    )
+    parser.add_argument("--wheel-dir", type=str, default="dist")
+    args = parser.parse_args()
+    update_wheel_index(args.cuda, args.wheel_dir)
+
+
+if __name__ == "__main__":
+    main()