Add patch for gRPC Python support

modules/grpc/1.56.3/MODULE.bazel

@@ -34,3 +34,19 @@ use_repo(
 grpc_extra_deps_ext = use_extension("//bazel:grpc_extra_deps.bzl", "grpc_extra_deps_ext")
 
 use_repo(grpc_extra_deps_ext, "com_google_googleapis_imports")
+
+bazel_dep(name = "rules_python", version = "0.28.0")
+python = use_extension("@rules_python//python/extensions:python.bzl", "python")
+python.toolchain(
+    python_version = "3.8",
+)
+use_repo(python, local_config_python = "python_3_8")
+pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
+pip.parse(
+    hub_name = "grpc_python_dependencies",
+    python_version = "3.8",
+    requirements_lock = "//:requirements.bazel.txt",
+)
+use_repo(pip, "grpc_python_dependencies")
+grpc_python_deps_ext = use_extension("//bazel:grpc_python_deps.bzl", "grpc_python_deps_ext")
+use_repo(grpc_python_deps_ext, "cython")

modules/grpc/1.56.3/patches/python.patch

@@ -0,0 +1,102 @@
+diff --git a/MODULE.bazel b/MODULE.bazel
+index caf4f829d4..bc2548f366 100644
+--- a/MODULE.bazel
++++ b/MODULE.bazel
+@@ -34,3 +34,19 @@ use_repo(
+ grpc_extra_deps_ext = use_extension("//bazel:grpc_extra_deps.bzl", "grpc_extra_deps_ext")
+
+ use_repo(grpc_extra_deps_ext, "com_google_googleapis_imports")
++
++bazel_dep(name = "rules_python", version = "0.28.0")
++python = use_extension("@rules_python//python/extensions:python.bzl", "python")
++python.toolchain(
++    python_version = "3.8",
++)
++use_repo(python, local_config_python = "python_3_8")
++pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
++pip.parse(
++    hub_name = "grpc_python_dependencies",
++    python_version = "3.8",
++    requirements_lock = "//:requirements.bazel.txt",
++)
++use_repo(pip, "grpc_python_dependencies")
++grpc_python_deps_ext = use_extension("//bazel:grpc_python_deps.bzl", "grpc_python_deps_ext")
++use_repo(grpc_python_deps_ext, "cython")
+diff --git a/bazel/grpc_python_deps.bzl b/bazel/grpc_python_deps.bzl
+index 39893eef6e..172933e062 100644
+--- a/bazel/grpc_python_deps.bzl
++++ b/bazel/grpc_python_deps.bzl
+@@ -16,6 +16,18 @@
+ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+ load("@com_github_grpc_grpc//third_party/py:python_configure.bzl", "python_configure")
+
++# buildifier: disable=unnamed-macro
++def cython():
++    http_archive(
++        name = "cython",
++        build_file = "@com_github_grpc_grpc//third_party:cython.BUILD",
++        sha256 = "a2da56cc22be823acf49741b9aa3aa116d4f07fa8e8b35a3cb08b8447b37c607",
++        strip_prefix = "cython-0.29.35",
++        urls = [
++            "https://github.com/cython/cython/archive/0.29.35.tar.gz",
++        ],
++    )
++
+ # buildifier: disable=unnamed-macro
+ def grpc_python_deps():
+     """Loads dependencies for gRPC Python."""
+@@ -36,12 +48,6 @@ def grpc_python_deps():
+     )
+
+     if "cython" not in native.existing_rules():
+-        http_archive(
+-            name = "cython",
+-            build_file = "@com_github_grpc_grpc//third_party:cython.BUILD",
+-            sha256 = "a2da56cc22be823acf49741b9aa3aa116d4f07fa8e8b35a3cb08b8447b37c607",
+-            strip_prefix = "cython-0.29.35",
+-            urls = [
+-                "https://github.com/cython/cython/archive/0.29.35.tar.gz",
+-            ],
+-        )
++        cython()
++
++grpc_python_deps_ext = module_extension(implementation = lambda ctx: cython())
+diff --git a/requirements.bazel.txt b/requirements.bazel.txt
+index f2dbfd7af8..ea81395c14 100644
+--- a/requirements.bazel.txt
++++ b/requirements.bazel.txt
+@@ -1,17 +1,25 @@
+ # GRPC Python setup requirements
++cachetools==4.2.4
++certifi==2017.4.17
++chardet==3.0.4
+ coverage==4.5.4
+ cython==0.29.21
+-protobuf>=3.5.0.post1, < 4.0dev
+-wheel==0.36.2
++gevent==22.8.0
+ google-auth==1.24.0
++googleapis-common-protos==1.5.5
++greenlet==1.1.3.post0
++grpcio==1.56.2
++idna==2.7
+ oauth2client==4.1.0
++protobuf>=3.5.0.post1, < 4.0dev
++pyasn1==0.5.1
++pyasn1-modules==0.3.0
+ requests==2.25.1
++rsa==4.9
++setuptools==69.0.3
++six==1.16.0
+ urllib3==1.26.5
+-chardet==3.0.4
+-certifi==2017.4.17
+-idna==2.7
+-googleapis-common-protos==1.5.5
+-gevent==22.08.0
+-zope.event==4.5.0
+-setuptools==44.1.1
++wheel==0.36.2
+ xds-protos==0.0.11
++zope-event==4.5.0
++zope-interface==6.1

modules/grpc/1.56.3/source.json

@@ -3,7 +3,8 @@
     "integrity": "sha256-hOMadwF5EbLxZH7K2wFyZx2WBJ6prVEJ8CtHF8DwNwI=",
     "strip_prefix": "grpc-1.56.3",
     "patches": {
-        "adopt_bzlmod.patch": "sha256-6z89v9iwJ0/OtRo53mne5MWTwCO0s00TJ8onoMtVwwU="
+        "adopt_bzlmod.patch": "sha256-6z89v9iwJ0/OtRo53mne5MWTwCO0s00TJ8onoMtVwwU=",
+        "python.patch": "sha256-IrZoAR9wQVJ2yDCIxYc5ffD76kjqTrsYHqUST8s3TLg="
     },
     "patch_strip": 1
 }