old_contents: 
  def _lower_underscore_to_upper_camel(str):
    humps = []
    for hump in str.split('_'):
      humps += [hump[0].upper() + hump[1:]]
    return "".join(humps)
  
  def objc_grpc_library(name, srcs, visibility=None):
    basename = srcs[0].split('/')[-1]
    filename = basename[:-6] # remove .proto suffix
    filename = _lower_underscore_to_upper_camel(filename)
  
    protoc_command = "protoc -I . "
    srcs_params = ""
    for src in srcs:
      srcs_params += " $(location %s)" % (src)
  
    # Messages
    protoc_messages_flags = "--objc_out=$(GENDIR)"
    native.genrule(
      name = name + "_mesages_codegen",
      srcs = srcs,
      outs = [
        filename + ".pbobjc.h",
        filename + ".pbobjc.m",
      ],
      cmd = protoc_command + protoc_messages_flags + srcs_params,
    )
    native.objc_library(
      name = name + "_messages",
      hdrs = [
        ":" + filename + ".pbobjc.h",
      ],
      includes = ["."],
      non_arc_srcs = [
        ":" + filename + ".pbobjc.m",
      ],
      deps = [
        "//external:protobuf_objc",
      ],
    )
  
    # Services
    protoc_services_flags = "--grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(location //external:grpc_protoc_plugin_objc)"
    native.genrule(
      name = name + "_codegen",
      srcs = srcs + ["//external:grpc_protoc_plugin_objc"],
      outs = [
        filename + ".pbrpc.h",
        filename + ".pbrpc.m",
      ],
      cmd = protoc_command + protoc_services_flags + srcs_params,
    )
    native.objc_library(
      name = name,
      hdrs = [
        ":" + filename + ".pbrpc.h",
      ],
      includes = ["."],
      srcs = [
        ":" + filename + ".pbrpc.m",
      ],
      deps = [
        ":" + name + "_messages",
        "//external:proto_objc_rpc",
      ],
      visibility = visibility,
    )
  
new_contents: 
  def _lower_underscore_to_upper_camel(str):
    humps = []
    for hump in str.split('_'):
      humps += [hump[0].upper() + hump[1:]]
    return "".join(humps)
  
  def objc_grpc_library(name, srcs, visibility=None):
    src_path_elements = srcs[0].split('/')
    src_dir = '/'.join(src_path_elements[:-1])
    basename = src_path_elements[-1]
    filename = basename[:-6] # remove .proto suffix
    filename = _lower_underscore_to_upper_camel(filename)
  
    protoc_command = "protoc -I . "
    srcs_params = ""
    for src in srcs:
      srcs_params += " $(location %s)" % (src)
  
    # Messages
    protoc_messages_flags = "--objc_out=$(GENDIR)"
    message_header = src_dir + '/' + filename + ".pbobjc.h"
    message_implementation = src_dir + '/' + filename + ".pbobjc.m"
    native.genrule(
      name = name + "_mesages_codegen",
      srcs = srcs,
      outs = [message_header, message_implementation],
      cmd = protoc_command + protoc_messages_flags + srcs_params,
    )
    native.objc_library(
      name = name + "_messages",
      hdrs = [message_header],
      includes = ["."],
      non_arc_srcs = [message_implementation],
      deps = [
        "//external:protobuf_objc",
      ],
    )
  
    # Services
    protoc_services_flags = "--grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(location //external:grpc_protoc_plugin_objc)"
    service_header = src_dir + '/' + filename + ".pbrpc.h"
    service_implementation = src_dir + '/' + filename + ".pbrpc.m"
    native.genrule(
      name = name + "_codegen",
      srcs = srcs + ["//external:grpc_protoc_plugin_objc"],
      outs = [service_header, service_implementation],
      cmd = protoc_command + protoc_services_flags + srcs_params,
    )
    native.objc_library(
      name = name,
      hdrs = [service_header],
      includes = ["."],
      srcs = [service_implementation],
      deps = [
        ":" + name + "_messages",
        "//external:proto_objc_rpc",
      ],
      visibility = visibility,
    )
  
subject: Support sources in nested dirs