Fix py_proto generation for submodules

databuild/BUILD.bazel

@@ -169,10 +169,15 @@ genrule(
         "py_proto_out/message_pool.py",
     ],
     cmd = """
-mkdir -p $(GENDIR)/databuild/py_proto_out
+mkdir -p $(@D)
 export PATH=$$PATH:$$(dirname $(location :protoc-gen-python_betterproto2))
 export PATH=$$PATH:$$(dirname $(location //:ruff_binary))
-$(location @com_google_protobuf//:protoc) --python_betterproto2_out=$(GENDIR)/databuild/py_proto_out $(location databuild.proto)
+$(location @com_google_protobuf//:protoc) --python_betterproto2_out=$(@D) $(location databuild.proto)
+mkdir -p $(@D)/py_proto_out/databuild/v1
+cp $(@D)/databuild/__init__.py $(@D)/py_proto_out/__init__.py
+cp $(@D)/databuild/__init__.py $(@D)/py_proto_out/databuild/__init__.py
+cp $(@D)/databuild/v1/__init__.py $(@D)/py_proto_out/databuild/v1/__init__.py
+cp $(@D)/message_pool.py $(@D)/py_proto_out/message_pool.py
 """,
     tools = [
         ":protoc-gen-python_betterproto2",

examples/podcast_reviews/MODULE.bazel

@@ -14,13 +14,13 @@ bazel_dep(name = "rules_python", version = "1.3.0")
 
 python = use_extension("@rules_python//python/extensions:python.bzl", "python")
 python.toolchain(
-    python_version = "3.13",
+    python_version = "3.12",
 )
 
 pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
 pip.parse(
     hub_name = "pypi",
-    python_version = "3.13",
+    python_version = "3.12",
     requirements_lock = "//:requirements_lock.txt",
 )
 use_repo(pip, "pypi")

examples/podcast_reviews/requirements_lock.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.13
+# This file is autogenerated by pip-compile with Python 3.12
 # by the following command:
 #
 #    bazel run //:py_requirements.update