Switch py_proto_library from using src to deps to conform with google3

bazel/python_rules.bzl

@@ -61,22 +61,22 @@ _generate_pb2_src = rule(
 
 def py_proto_library(
         name,
-        srcs,
+        deps,
         **kwargs):
     """Generate python code for a protobuf.
 
     Args:
       name: The name of the target.
-      srcs: A list of proto_library dependencies. Must contain a single element.
+      deps: A list of proto_library dependencies. Must contain a single element.
     """
     codegen_target = "_{}_codegen".format(name)
-    if len(srcs) != 1:
+    if len(deps) != 1:
         fail("Can only compile a single proto at a time.")
 
 
     _generate_pb2_src(
         name = codegen_target,
-        deps = srcs,
+        deps = deps,
         **kwargs
     )
 

bazel/test/python_test_repo/BUILD

@@ -29,7 +29,7 @@ proto_library(
 
 py_proto_library(
     name = "helloworld_py_pb2",
-    srcs = [":helloworld_proto"],
+    deps = [":helloworld_proto"],
 )
 
 py_grpc_library(
@@ -40,12 +40,12 @@ py_grpc_library(
 
 py_proto_library(
     name = "duration_py_pb2",
-    srcs = ["@com_google_protobuf//:duration_proto"],
+    deps = ["@com_google_protobuf//:duration_proto"],
 )
 
 py_proto_library(
     name = "timestamp_py_pb2",
-    srcs = ["@com_google_protobuf//:timestamp_proto"],
+    deps = ["@com_google_protobuf//:timestamp_proto"],
 )
 
 py_test(

src/proto/grpc/testing/BUILD

@@ -75,7 +75,7 @@ proto_library(
 
 py_proto_library(
     name = "empty_py_pb2",
-    srcs = [":empty_proto_descriptor"],
+    deps = [":empty_proto_descriptor"],
 )
 
 py_grpc_library(
@@ -97,7 +97,7 @@ proto_library(
 
 py_proto_library(
     name = "py_messages_proto",
-    srcs = [":messages_proto_descriptor"],
+    deps = [":messages_proto_descriptor"],
 )
 
 py_grpc_library(
@@ -206,7 +206,7 @@ proto_library(
 
 py_proto_library(
     name = "py_test_proto",
-    srcs = [":test_proto_descriptor"],
+    deps = [":test_proto_descriptor"],
 )
 
 py_grpc_library(

src/proto/grpc/testing/proto2/BUILD.bazel

@@ -10,7 +10,7 @@ proto_library(
 
 py_proto_library(
     name = "empty2_proto",
-    srcs = [":empty2_proto_descriptor"],
+    deps = [":empty2_proto_descriptor"],
 )
 
 proto_library(
@@ -23,6 +23,6 @@ proto_library(
 
 py_proto_library(
     name = "empty2_extensions_proto",
-    srcs = [":empty2_extensions_proto_descriptor"],
+    deps = [":empty2_extensions_proto_descriptor"],
 )
 

src/python/grpcio_channelz/grpc_channelz/v1/BUILD.bazel

@@ -3,7 +3,7 @@ package(default_visibility = ["//visibility:public"])
 
 py_proto_library(
     name = "channelz_py_pb2",
-    srcs = ["//src/proto/grpc/channelz:channelz_proto_descriptors"],
+    deps = ["//src/proto/grpc/channelz:channelz_proto_descriptors"],
 )
 
 py_grpc_library(

src/python/grpcio_health_checking/grpc_health/v1/BUILD.bazel

@@ -3,7 +3,7 @@ package(default_visibility = ["//visibility:public"])
 
 py_proto_library(
     name = "health_py_pb2",
-    srcs = ["//src/proto/grpc/health/v1:health_proto_descriptor",],
+    deps = ["//src/proto/grpc/health/v1:health_proto_descriptor",],
 )
 
 py_grpc_library(

src/python/grpcio_reflection/grpc_reflection/v1alpha/BUILD.bazel

@@ -5,7 +5,7 @@ package(default_visibility = ["//visibility:public"])
 
 py_proto_library(
     name = "reflection_py_pb2",
-    srcs = ["//src/proto/grpc/reflection/v1alpha:reflection_proto_descriptor",],
+    deps = ["//src/proto/grpc/reflection/v1alpha:reflection_proto_descriptor",],
 )
 
 py_grpc_library(