setup.py

#! /usr/bin/env python
#  -*- coding: utf-8 -*-
#
# This file is part of ofunctions package


__intname__ = "ofunctions.setup"
__author__ = "Orsiris de Jong"
__copyright__ = "Copyright (C) 2021 Orsiris de Jong"
__licence__ = "BSD 3 Clause"
__build__ = "2021031601"

"""
Namespace packaging here

# Make sure we declare an __init__.py file as namespace holder in the package root containing the following

try:
    __import__('pkg_resources').declare_namespace(__name__)
except ImportError:
    from pkgutil import extend_path
    __path__ = extend_path(__path__, __name__)
"""

import sys
import os
import shutil

import pkg_resources
import setuptools


def _read_file(filename):
    here = os.path.abspath(os.path.dirname(__file__))
    if sys.version_info[0] > 2:
        with open(os.path.join(here, filename), "r", encoding="utf-8") as file_handle:
            return file_handle.read()
    else:
        # With python 2.7, open has no encoding parameter, resulting in TypeError
        # Fix with io.open (slow but works)
        from io import open as io_open

        with io_open(
            os.path.join(here, filename), "r", encoding="utf-8"
        ) as file_handle:
            return file_handle.read()


def get_metadata(package_file):
    """
    Read metadata from package file
    """

    _metadata = {}

    for line in _read_file(package_file).splitlines():
        if line.startswith("__version__") or line.startswith("__description__"):
            delim = "="
            _metadata[line.split(delim)[0].strip().strip("__")] = (
                line.split(delim)[1].strip().strip("'\"")
            )
    return _metadata


def parse_requirements(filename):
    """
    There is a parse_requirements function in pip but it keeps changing import path
    Let's build a simple one
    """
    try:
        requirements_txt = _read_file(filename)
        install_requires = [
            str(requirement)
            for requirement in pkg_resources.parse_requirements(requirements_txt)
        ]
        return install_requires
    except OSError:
        print(
            'WARNING: No requirements.txt file found as "{}". Please check path or create an empty one'.format(
                filename
            )
        )


def clear_package_build_path(package_rel_path):
    """
    We need to clean build path, but setuptools will wait for build/lib/package_name so we need to create that
    """
    build_path = os.path.abspath(os.path.join("build", "lib", package_rel_path))
    try:
        # We need to use shutil.rmtree() instead of os.remove() since the latter implementation
        # produces "WindowsError: [Error 5] Access is denied"
        shutil.rmtree("build")
    except FileNotFoundError:
        print("build path: {} does not exist".format(build_path))
    # Now we need to create the 'build/lib/package/subpackage' path so setuptools won't fail
    os.makedirs(build_path)


#  ######### ACTUAL SCRIPT ENTRY POINT

NAMESPACE_PACKAGE_NAME = "ofunctions"
namespace_package_path = os.path.abspath(NAMESPACE_PACKAGE_NAME)
namespace_package_file = os.path.join(namespace_package_path, "__init__.py")
metadata = get_metadata(namespace_package_file)
requirements = parse_requirements(
    os.path.join(namespace_package_path, "requirements.txt")
)
long_description = _read_file("README.md")

# First lets make sure build path is clean (avoiding namespace package pollution in subpackages)
# Clean build dir before every run so we don't make cumulative wheel files
clear_package_build_path(NAMESPACE_PACKAGE_NAME)

# Generic namespace package
setuptools.setup(
    name=NAMESPACE_PACKAGE_NAME,
    namespace_packages=[NAMESPACE_PACKAGE_NAME],
    packages=setuptools.find_namespace_packages(include=["ofunctions.*"]),
    version=metadata["version"],
    install_requires=requirements,
    classifiers=[
        "Development Status :: 5 - Production/Stable",
        "Intended Audience :: Developers",
        "Topic :: Software Development",
        "Topic :: System",
        "Topic :: System :: Operating System",
        "Topic :: System :: Shells",
        "Programming Language :: Python",
        "Programming Language :: Python :: 3",
        "Programming Language :: Python :: Implementation :: CPython",
        "Programming Language :: Python :: Implementation :: PyPy",
        "Operating System :: POSIX :: Linux",
        "Operating System :: POSIX :: BSD :: FreeBSD",
        "Operating System :: POSIX :: BSD :: NetBSD",
        "Operating System :: POSIX :: BSD :: OpenBSD",
        "Operating System :: Microsoft",
        "Operating System :: Microsoft :: Windows",
        "License :: OSI Approved :: BSD License",
    ],
    description=metadata["description"],
    author="NetInvent - Orsiris de Jong",
    author_email="contact@netinvent.fr",
    url="https://github.com/netinvent/ofunctions",
    keywords=["network", "bisection", "logging"],
    long_description=long_description,
    long_description_content_type="text/markdown",
    python_requires=">=3.5",
    # namespace packages don't work well with zipped eggs
    # ref https://packaging.python.org/guides/packaging-namespace-packages/
    zip_safe=False,
)


for package in setuptools.find_namespace_packages(include=["ofunctions.*"]):
    rel_package_path = package.replace(".", os.sep)
    package_path = os.path.abspath(rel_package_path)
    package_file = os.path.join(package_path, "__init__.py")
    metadata = get_metadata(package_file)
    requirements = parse_requirements(os.path.join(package_path, "requirements.txt"))
    print(package_path)
    print(package_file)
    print(metadata)
    print(requirements)

    # Again, we need to clean build paths between runs
    clear_package_build_path(rel_package_path)

    setuptools.setup(
        name=package,
        namespace_packages=[NAMESPACE_PACKAGE_NAME],
        packages=[package],
        package_data={package: ["__init__.py"]},
        version=metadata["version"],
        install_requires=requirements,
        classifiers=[
            "Development Status :: 5 - Production/Stable",
            "Intended Audience :: Developers",
            "Topic :: Software Development",
            "Topic :: System",
            "Topic :: System :: Operating System",
            "Topic :: System :: Shells",
            "Programming Language :: Python",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: Implementation :: CPython",
            "Programming Language :: Python :: Implementation :: PyPy",
            "Operating System :: POSIX :: Linux",
            "Operating System :: POSIX :: BSD :: FreeBSD",
            "Operating System :: POSIX :: BSD :: NetBSD",
            "Operating System :: POSIX :: BSD :: OpenBSD",
            "Operating System :: Microsoft",
            "Operating System :: Microsoft :: Windows",
            "License :: OSI Approved :: BSD License",
        ],
        description=metadata["description"],
        author="NetInvent - Orsiris de Jong",
        author_email="contact@netinvent.fr",
        url="https://github.com/netinvent/ofunctions",
        keywords=["network", "bisection", "logging"],
        long_description=long_description,
        long_description_content_type="text/markdown",
        python_requires=">=3.5",
        # namespace packages don't work well with zipped eggs
        # ref https://packaging.python.org/guides/packaging-namespace-packages/
        zip_safe=False,
    )