如何让IntelliJ IDEA识别出bazel生成的python protobufs？

Question

我很难让IntelliJ IDEA在python中识别生成的protobuf源。

我有一个proto文件，一个python文件和BUILD文件：

$ find -type f
./WORKSPACE
./src/proto/BUILD
./src/proto/mymessage.proto
./src/python/foo/BUILD
./src/python/foo/foo.py

我的python脚本为protobuf导入生成的python类：

$ cat src/python/foo/foo.py 
from src.proto import mymessage_pb2

message = mymessage_pb2.MyMessage()
message.my_field = "Hello world!"

print(message.my_field)

proto的Python类以这种方式生成：

$ cat src/proto/BUILD 
package(default_visibility = ["//visibility:public"])

genrule(
    name = "gen_mymessage_py_proto",
    srcs = ["mymessage.proto"],
    outs = ["mymessage_pb2.py"],
    cmd = "protoc $(location mymessage.proto) --python_out=$(GENDIR) ",
)

py_library(
    name = "mymessage_py_proto",
    srcs = [":gen_mymessage_py_proto"],
)

Bazel按预期运行一切：

$ bazel run src/python/foo:foo 
INFO: Analysed target //src/python/foo:foo (16 packages loaded).
INFO: Found 1 target...
Target //src/python/foo:foo up-to-date:
  bazel-bin/src/python/foo/foo
INFO: Elapsed time: 0.525s, Critical Path: 0.05s
INFO: Build completed successfully, 5 total actions

INFO: Running command line: bazel-bin/src/python/foo/foo
Hello world!

但是IntelliJ无法识别导入：

如何让IntelliJ识别此导入？

Answer 1

Bazel不支持解析genfile导入。这被修复为issues/144的一部分。该修复程序应于11月3日发布。