import codecs
import os
import re
import sys

from setuptools import setup, find_packages
from setuptools.command.test import test as TestCommand


NAME = "attrs"
META_PATH = os.path.join("attr", "__init__.py")

###############################################################################

HERE = os.path.abspath(os.path.dirname(__file__))


def read(*parts):
    """
    Build an absolute path from *parts* and and return the contents of the
    resulting file.  Assume UTF-8 encoding.
    """
    with codecs.open(os.path.join(HERE, *parts), "rb", "utf-8") as f:
        return f.read()


META_FILE = read(META_PATH)


def find_meta(meta):
    """
    Extract __*meta*__ from META_FILE.
    """
    meta_match = re.search(
        r"^__{meta}__ = ['\"]([^'\"]*)['\"]".format(meta=meta),
        META_FILE, re.M
    )
    if meta_match:
        return meta_match.group(1)
    raise RuntimeError("Unable to find __{meta}__ string.".format(meta=meta))


class PyTest(TestCommand):
    user_options = [("pytest-args=", "a", "Arguments to pass to py.test")]

    def initialize_options(self):
        TestCommand.initialize_options(self)
        self.pytest_args = None

    def finalize_options(self):
        TestCommand.finalize_options(self)
        self.test_args = []
        self.test_suite = True

    def run_tests(self):
        # import here, cause outside the eggs aren't loaded
        import pytest
        errno = pytest.main(self.pytest_args or [] +
                            ["tests"])
        sys.exit(errno)


if __name__ == "__main__":
    setup(
        name=NAME,
        description=find_meta("description"),
        license=find_meta("license"),
        url=find_meta("uri"),
        version=find_meta("version"),
        author=find_meta("author"),
        author_email=find_meta("email"),
        maintainer=find_meta("author"),
        maintainer_email=find_meta("email"),
        keywords=find_meta("keywords"),
        long_description=(
            read("README.rst") + "\n\n" +
            read("AUTHORS.rst")
        ),
        packages=find_packages(exclude=["tests*"]),
        zip_safe=False,
        classifiers=[
            "Development Status :: 3 - Alpha",
            "Intended Audience :: Developers",
            "Natural Language :: English",
            "License :: OSI Approved :: MIT License",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.6",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.3",
            "Programming Language :: Python :: 3.4",
            "Programming Language :: Python :: Implementation :: CPython",
            "Programming Language :: Python :: Implementation :: PyPy",
            "Topic :: Software Development :: Libraries :: Python Modules",
        ],
        install_requires=[
        ],
        tests_require=[
            "pytest",
            "zope.interface",
        ],
        cmdclass={
            "test": PyTest,
        },
    )