[HACKS] How to directly use `py_proto_library` in Bazel.

README.md

Caution

This is a hack, there is absolutely no guaratee that this hack will work in later version of Bazel/Protobuf releases.

You have been warned.

Preperation

mkdir proto && mv proto.BUILD proto/BUILD && mv definition.proto proto

Run the test program

bazel run program

BUILD

# cc_binary(
#     name = "protoc",
#     srcs = ["@com_google_protobuf//src/google/protobuf/compiler/main.cc"],
#     linkopts = ["-lpthread", "-lm"],
#     visibility = ["//visibility:public"],
#     deps = ["@com_google_protobuf//:protoc_lib"],
# )

py_library(
    name = "protobuf_python",
    deps = ["@com_google_protobuf//:protobuf_python"],
    visibility = ["//visibility:public"],
)

py_binary(
    name = "program",
    srcs = ["program.py"],
    deps = ["//proto:py_pb_lib"],
)

definition.proto

syntax = "proto3";

message Request {
    string name = 1;
}

proto.BUILD

load("@com_google_protobuf//:protobuf.bzl", "py_proto_library")

proto_library(
    name = "pb_lib",
    srcs = ["definition.proto"],
)

py_proto_library(
    name = "py_pb_lib",
    srcs = ["definition.proto"],
    protoc = "@com_google_protobuf//:protoc",
    visibility = ["//visibility:public"],
)

six.BUILD

genrule(
  name = "copy_six",
  srcs = ["six-1.10.0/six.py"],
  outs = ["six.py"],
  cmd = "cp $< $(@)",
)

py_library(
  name = "six",
  srcs = ["six.py"],
  srcs_version = "PY2AND3",
  visibility = ["//visibility:public"],
)

WORKSPACE

http_archive(
    name = "com_google_protobuf",
    sha256 = "1f8b9b202e9a4e467ff0b0f25facb1642727cdf5e69092038f15b37c75b99e45",
    strip_prefix = "protobuf-3.5.1",
    urls = ["https://github.com/google/protobuf/archive/v3.5.1.zip"],
)

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "six_archive",
    build_file = "@//:six.BUILD",
    sha256 = "105f8d68616f8248e24bf0e9372ef04d3cc10104f1980f54d57b2ce73a5ad56a",
    urls = ["https://pypi.python.org/packages/source/s/six/six-1.10.0.tar.gz#md5=34eed507548117b2ab523ab14b2f8b55"],
)

bind(
  name = "six",
  actual = "@six_archive//:six",
)