Use sh_binary rule instead of py_binary

tests/protoc.bzl

@@ -14,12 +14,12 @@ def _protoc_wrapper_impl(ctx):
  ctx.actions.write(
  output = protoc_wrapper_file,
  content = """\
-import os, subprocess, sys
+#!/usr/bin/env bash
 
-path = os.environ.get("PATH", "")
-path = os.pathsep.join([path, os.path.realpath(os.path.dirname({compiler_exe}))])
-os.environ["PATH"] = path
-subprocess.check_call([{protoc}] + sys.argv[1:])
+set -eo pipefail
+
+PATH=$PATH:$(cd "$(dirname ${compiler_exe})" && pwd )
+exec {protoc} "$@"
 """.format(protoc = repr(ctx.executable._protoc.path), compiler_exe = repr(compiler)),
  is_executable = True,
  )
@@ -32,16 +32,14 @@ _protoc_wrapper = rule(
  executable = True,
  implementation = _protoc_wrapper_impl,
  attrs = {
- "_protoc": attr.label(executable = True, cfg="exec", default = "@com_google_protobuf//:protoc"),
+ "_protoc": attr.label(executable = True, cfg = "exec", default = "@com_google_protobuf//:protoc"),
  },
  toolchains = ["@rules_cc//cc:toolchain_type"],
 )
 
 def protoc_wrapper(name):
- _protoc_wrapper(name = name + ".py")
- py_binary(
+ _protoc_wrapper(name = name + ".sh")
+ native.sh_binary(
  name = name,
- srcs = [name + ".py"],
- srcs_version = "PY3",
- python_version = "PY3",
+ srcs = [name + ".sh"],
  )