pkg_tar does not include bazel-created __init__.py files

[ashuels]

Description of the bug:

When using pkg_tar on a py_binary and specifying include_runfiles=True, the bazel-created __init__.py files are not included in the tar.

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

py_binary(
    name = "foo",
    srcs = ["foo.py"]
)

pkg_tar(
    name = "foo-pkg",
    srcs = [":foo"],
    extension = "tar.gz",
    include_runfiles = True,
    package_dir = "foo.runfiles/__main__",
    strip_prefix = ".",
)

Which operating system are you running Bazel on?

Ubuntu 18.04

What is the output of bazel info release?

release 3.4.1

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

No response

What's the output of git remote get-url origin; git rev-parse master; git rev-parse HEAD ?

No response

Have you found anything relevant by searching the web?

No response

Any other information, logs, or outputs that you want to share?

No response