[CI] Build a CPU-only wheel under name xgboost-cpu (#10603)

dev/release-artifacts.py

@@ -2,6 +2,7 @@
 
 tqdm, sh are required to run this script.
 """
+
 import argparse
 import os
 import shutil
@@ -106,6 +107,15 @@ def make_pysrc_wheel(
     if not os.path.exists(dist):
         os.mkdir(dist)
 
+    # Apply patch to remove NCCL dependency
+    # Save the original content of pyproject.toml so that we can restore it later
+    with DirectoryExcursion(ROOT):
+        with open("python-package/pyproject.toml", "r") as f:
+            orig_pyproj_lines = f.read()
+        with open("tests/buildkite/remove_nccl_dep.patch", "r") as f:
+            patch_lines = f.read()
+        subprocess.run(["patch", "-p0"], input=patch_lines, text=True)
+
     with DirectoryExcursion(os.path.join(ROOT, "python-package")):
         subprocess.check_call(["python", "-m", "build", "--sdist"])
         if rc is not None:
@@ -117,6 +127,10 @@ def make_pysrc_wheel(
         target = os.path.join(dist, name)
         shutil.move(src, target)
 
+    with DirectoryExcursion(ROOT):
+        with open("python-package/pyproject.toml", "w") as f:
+            print(orig_pyproj_lines, file=f, end="")
+
 
 def download_py_packages(
     branch: str, major: int, minor: int, commit_hash: str, outdir: str