fdk/scripts directory not being included in wheel package

Description:

The fn/scripts directory is not being copied into the wheel package when building the project from source distribution. It seems that such directory is being ignored because it is not a valid python package. This issue causes the mian fdk script to fail with the following error: ModuleNotFoundError: No module named 'fdk.scripts'. Such error is raised because the script has the following import statement: from fdk.scripts.fdk import main.

The issue can be easily fixed by adding an empty __init__.py file to fdk/scripts.

The setup.py corroborates my theory:

setuptools.setup(setup_requires=['pbr>=2.0.0'],
                 pbr=True,
                 packages=setuptools.find_packages(
                     exclude=["internal", "internal.*"])
                 )

Steps to reproduce the issue:

• Download any source distribution file from releases
• Build wheel package from root directory:

python3 setup.py bdist_wheel
or
python3 -m build 

Describe the results you received:

running bdist_wheel
running build
running build_py
creating build
creating build/lib
creating build/lib/fdk
copying fdk/__init__.py -> build/lib/fdk
copying fdk/constants.py -> build/lib/fdk
copying fdk/context.py -> build/lib/fdk
copying fdk/customer_code.py -> build/lib/fdk
copying fdk/errors.py -> build/lib/fdk
copying fdk/event_handler.py -> build/lib/fdk
copying fdk/fixtures.py -> build/lib/fdk
copying fdk/headers.py -> build/lib/fdk
copying fdk/log.py -> build/lib/fdk
copying fdk/response.py -> build/lib/fdk
copying fdk/runner.py -> build/lib/fdk
copying fdk/version.py -> build/lib/fdk
creating build/lib/fdk/async_http
copying fdk/async_http/__init__.py -> build/lib/fdk/async_http
copying fdk/async_http/app.py -> build/lib/fdk/async_http
copying fdk/async_http/error_handler.py -> build/lib/fdk/async_http
copying fdk/async_http/exceptions.py -> build/lib/fdk/async_http
copying fdk/async_http/protocol.py -> build/lib/fdk/async_http
copying fdk/async_http/request.py -> build/lib/fdk/async_http
copying fdk/async_http/response.py -> build/lib/fdk/async_http
copying fdk/async_http/router.py -> build/lib/fdk/async_http
copying fdk/async_http/server.py -> build/lib/fdk/async_http
creating build/lib/fdk/tests
copying fdk/tests/__init__.py -> build/lib/fdk/tests
copying fdk/tests/funcs.py -> build/lib/fdk/tests
copying fdk/tests/tcp_debug.py -> build/lib/fdk/tests
copying fdk/tests/test_delayed_loader.py -> build/lib/fdk/tests
copying fdk/tests/test_headers.py -> build/lib/fdk/tests
copying fdk/tests/test_http_stream.py -> build/lib/fdk/tests
copying fdk/tests/test_protocol.py -> build/lib/fdk/tests
copying fdk/tests/test_tracing.py -> build/lib/fdk/tests
running egg_info
writing fdk.egg-info/PKG-INFO
writing dependency_links to fdk.egg-info/dependency_links.txt
writing entry points to fdk.egg-info/entry_points.txt
writing requirements to fdk.egg-info/requires.txt
writing top-level names to fdk.egg-info/top_level.txt
[pbr] Reusing existing SOURCES.txt
creating build/lib/fdk/scripts
copying fdk/scripts/fdk.py -> build/lib/fdk/scripts
copying fdk/scripts/fdk_tcp_debug.py -> build/lib/fdk/scripts
/usr/local/lib/python3.6/site-packages/setuptools/command/install.py:37: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
  setuptools.SetuptoolsDeprecationWarning,
installing to build/bdist.linux-x86_64/wheel
running install
[pbr] Generating AUTHORS
[pbr] AUTHORS complete (0.0s)
running install_lib
creating build/bdist.linux-x86_64
creating build/bdist.linux-x86_64/wheel
creating build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/__init__.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/constants.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/context.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/customer_code.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/errors.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/event_handler.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/fixtures.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/headers.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/log.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/response.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/runner.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/version.py -> build/bdist.linux-x86_64/wheel/fdk
creating build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/__init__.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/app.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/error_handler.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/exceptions.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/protocol.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/request.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/response.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/router.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/server.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
creating build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/__init__.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/funcs.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/tcp_debug.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_delayed_loader.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_headers.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_http_stream.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_protocol.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_tracing.py -> build/bdist.linux-x86_64/wheel/fdk/tests
creating build/bdist.linux-x86_64/wheel/fdk/scripts
copying build/lib/fdk/scripts/fdk.py -> build/bdist.linux-x86_64/wheel/fdk/scripts
copying build/lib/fdk/scripts/fdk_tcp_debug.py -> build/bdist.linux-x86_64/wheel/fdk/scripts
running install_egg_info
Copying fdk.egg-info to build/bdist.linux-x86_64/wheel/fdk-0.1.44-py3.6.egg-info
running install_scripts
/usr/local/lib/python3.6/site-packages/pbr/packaging.py:459: EasyInstallDeprecationWarning: Use get_header
  header = easy_install.get_script_header("", executable, is_wininst)
adding license file "AUTHORS" (matched pattern "AUTHORS")
adding license file "LICENSE" (matched pattern "LICENSE")
adding license file "NOTICE.txt" (matched pattern "NOTICE.txt")
adding license file "THIRD_PARTY_LICENSES.txt" (matched pattern "THIRD_PARTY_LICENSES.txt")
creating build/bdist.linux-x86_64/wheel/fdk-0.1.44.dist-info/WHEEL
creating 'dist/fdk-0.1.44-py3-none-any.whl' and adding 'build/bdist.linux-x86_64/wheel' to it
adding 'fdk/__init__.py'
adding 'fdk/constants.py'
adding 'fdk/context.py'
adding 'fdk/customer_code.py'
adding 'fdk/errors.py'
adding 'fdk/event_handler.py'
adding 'fdk/fixtures.py'
adding 'fdk/headers.py'
adding 'fdk/log.py'
adding 'fdk/response.py'
adding 'fdk/runner.py'
adding 'fdk/version.py'
adding 'fdk/async_http/__init__.py'
adding 'fdk/async_http/app.py'
adding 'fdk/async_http/error_handler.py'
adding 'fdk/async_http/exceptions.py'
adding 'fdk/async_http/protocol.py'
adding 'fdk/async_http/request.py'
adding 'fdk/async_http/response.py'
adding 'fdk/async_http/router.py'
adding 'fdk/async_http/server.py'
adding 'fdk/scripts/fdk.py'
adding 'fdk/scripts/fdk_tcp_debug.py'
adding 'fdk/tests/__init__.py'
adding 'fdk/tests/funcs.py'
adding 'fdk/tests/tcp_debug.py'
adding 'fdk/tests/test_delayed_loader.py'
adding 'fdk/tests/test_headers.py'
adding 'fdk/tests/test_http_stream.py'
adding 'fdk/tests/test_protocol.py'
adding 'fdk/tests/test_tracing.py'
adding 'fdk-0.1.44.dist-info/AUTHORS'
adding 'fdk-0.1.44.dist-info/LICENSE'
adding 'fdk-0.1.44.dist-info/METADATA'
adding 'fdk-0.1.44.dist-info/NOTICE.txt'
adding 'fdk-0.1.44.dist-info/THIRD_PARTY_LICENSES.txt'
adding 'fdk-0.1.44.dist-info/WHEEL'
adding 'fdk-0.1.44.dist-info/entry_points.txt'
adding 'fdk-0.1.44.dist-info/pbr.json'
adding 'fdk-0.1.44.dist-info/top_level.txt'
adding 'fdk-0.1.44.dist-info/RECORD'
removing build/bdist.linux-x86_64/wheel

Describe the results you expected:

running bdist_wheel
running build
running build_py
copying fdk/scripts/__init__.py -> build/lib/fdk/scripts
running egg_info
writing fdk.egg-info/PKG-INFO
writing dependency_links to fdk.egg-info/dependency_links.txt
writing entry points to fdk.egg-info/entry_points.txt
writing requirements to fdk.egg-info/requires.txt
writing top-level names to fdk.egg-info/top_level.txt
[pbr] Reusing existing SOURCES.txt
/usr/local/lib/python3.6/site-packages/setuptools/command/install.py:37: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
  setuptools.SetuptoolsDeprecationWarning,
installing to build/bdist.linux-x86_64/wheel
running install
[pbr] Generating AUTHORS
[pbr] AUTHORS complete (0.0s)
running install_lib
creating build/bdist.linux-x86_64/wheel
creating build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/__init__.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/constants.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/context.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/customer_code.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/errors.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/event_handler.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/fixtures.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/headers.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/log.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/response.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/runner.py -> build/bdist.linux-x86_64/wheel/fdk
copying build/lib/fdk/version.py -> build/bdist.linux-x86_64/wheel/fdk
creating build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/__init__.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/app.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/error_handler.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/exceptions.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/protocol.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/request.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/response.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/router.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
copying build/lib/fdk/async_http/server.py -> build/bdist.linux-x86_64/wheel/fdk/async_http
creating build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/__init__.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/funcs.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/tcp_debug.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_delayed_loader.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_headers.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_http_stream.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_protocol.py -> build/bdist.linux-x86_64/wheel/fdk/tests
copying build/lib/fdk/tests/test_tracing.py -> build/bdist.linux-x86_64/wheel/fdk/tests
creating build/bdist.linux-x86_64/wheel/fdk/scripts
copying build/lib/fdk/scripts/fdk.py -> build/bdist.linux-x86_64/wheel/fdk/scripts
copying build/lib/fdk/scripts/fdk_tcp_debug.py -> build/bdist.linux-x86_64/wheel/fdk/scripts
copying build/lib/fdk/scripts/__init__.py -> build/bdist.linux-x86_64/wheel/fdk/scripts
running install_egg_info
Copying fdk.egg-info to build/bdist.linux-x86_64/wheel/fdk-0.1.44-py3.6.egg-info
running install_scripts
/usr/local/lib/python3.6/site-packages/pbr/packaging.py:459: EasyInstallDeprecationWarning: Use get_header
  header = easy_install.get_script_header("", executable, is_wininst)
adding license file "AUTHORS" (matched pattern "AUTHORS")
adding license file "LICENSE" (matched pattern "LICENSE")
adding license file "NOTICE.txt" (matched pattern "NOTICE.txt")
adding license file "THIRD_PARTY_LICENSES.txt" (matched pattern "THIRD_PARTY_LICENSES.txt")
creating build/bdist.linux-x86_64/wheel/fdk-0.1.44.dist-info/WHEEL
creating 'dist/fdk-0.1.44-py3-none-any.whl' and adding 'build/bdist.linux-x86_64/wheel' to it
adding 'fdk/__init__.py'
adding 'fdk/constants.py'
adding 'fdk/context.py'
adding 'fdk/customer_code.py'
adding 'fdk/errors.py'
adding 'fdk/event_handler.py'
adding 'fdk/fixtures.py'
adding 'fdk/headers.py'
adding 'fdk/log.py'
adding 'fdk/response.py'
adding 'fdk/runner.py'
adding 'fdk/version.py'
adding 'fdk/async_http/__init__.py'
adding 'fdk/async_http/app.py'
adding 'fdk/async_http/error_handler.py'
adding 'fdk/async_http/exceptions.py'
adding 'fdk/async_http/protocol.py'
adding 'fdk/async_http/request.py'
adding 'fdk/async_http/response.py'
adding 'fdk/async_http/router.py'
adding 'fdk/async_http/server.py'
adding 'fdk/scripts/__init__.py'
adding 'fdk/scripts/fdk.py'
adding 'fdk/scripts/fdk_tcp_debug.py'
adding 'fdk/tests/__init__.py'
adding 'fdk/tests/funcs.py'
adding 'fdk/tests/tcp_debug.py'
adding 'fdk/tests/test_delayed_loader.py'
adding 'fdk/tests/test_headers.py'
adding 'fdk/tests/test_http_stream.py'
adding 'fdk/tests/test_protocol.py'
adding 'fdk/tests/test_tracing.py'
adding 'fdk-0.1.44.dist-info/AUTHORS'
adding 'fdk-0.1.44.dist-info/LICENSE'
adding 'fdk-0.1.44.dist-info/METADATA'
adding 'fdk-0.1.44.dist-info/NOTICE.txt'
adding 'fdk-0.1.44.dist-info/THIRD_PARTY_LICENSES.txt'
adding 'fdk-0.1.44.dist-info/WHEEL'
adding 'fdk-0.1.44.dist-info/entry_points.txt'
adding 'fdk-0.1.44.dist-info/pbr.json'
adding 'fdk-0.1.44.dist-info/top_level.txt'
adding 'fdk-0.1.44.dist-info/RECORD'
removing build/bdist.linux-x86_64/wheel

Additional information you deem important (e.g. issue happens only occasionally):
The issue happens when building any version of source distribution files.

Additional environment details (python version, code sample, etc.):
Python 3.6.8