#!/usr/bin/env python
"""NumPy: array processing for numbers, strings, records, and objects.

NumPy is a general-purpose array-processing package designed to
efficiently manipulate large multi-dimensional arrays of arbitrary
records without sacrificing too much speed for small multi-dimensional
arrays.  NumPy is built on the Numeric code base and adds features
introduced by numarray as well as an extended C-API and the ability to
create arrays of arbitrary type which also makes NumPy suitable for
interfacing with general-purpose data-base applications.

There are also basic facilities for discrete fourier transform,
basic linear algebra and random number generation.

All numpy wheels distributed from pypi are BSD licensed.

Windows wheels are linked against the ATLAS BLAS / LAPACK library, restricted
to SSE2 instructions, so may not give optimal linear algebra performance for
your machine. See http://docs.scipy.org/doc/numpy/user/install.html for
alternatives.

"""
from __future__ import division, print_function

DOCLINES = (__doc__ or '').split("\n")

import os
import sys
import subprocess
import textwrap


if sys.version_info[:2] < (2, 7) or (3, 0) <= sys.version_info[:2] < (3, 4):
    raise RuntimeError("Python version 2.7 or >= 3.4 required.")

if sys.version_info[0] >= 3:
    import builtins
else:
    import __builtin__ as builtins


CLASSIFIERS = """\
Development Status :: 5 - Production/Stable
Intended Audience :: Science/Research
Intended Audience :: Developers
License :: OSI Approved
Programming Language :: C
Programming Language :: Python
Programming Language :: Python :: 2
Programming Language :: Python :: 2.7
Programming Language :: Python :: 3
Programming Language :: Python :: 3.4
Programming Language :: Python :: 3.5
Programming Language :: Python :: 3.6
Programming Language :: Python :: Implementation :: CPython
Topic :: Software Development
Topic :: Scientific/Engineering
Operating System :: Microsoft :: Windows
Operating System :: POSIX
Operating System :: Unix
Operating System :: MacOS
"""

MAJOR               = 1
MINOR               = 13
MICRO               = 0
ISRELEASED          = True
VERSION             = '%d.%d.%d' % (MAJOR, MINOR, MICRO)


# Return the git revision as a string
def git_version():
    def _minimal_ext_cmd(cmd):
        # construct minimal environment
        env = {}
        for k in ['SYSTEMROOT', 'PATH', 'HOME']:
            v = os.environ.get(k)
            if v is not None:
                env[k] = v
        # LANGUAGE is used on win32
        env['LANGUAGE'] = 'C'
        env['LANG'] = 'C'
        env['LC_ALL'] = 'C'
        out = subprocess.Popen(cmd, stdout = subprocess.PIPE, env=env).communicate()[0]
        return out

    try:
        out = _minimal_ext_cmd(['git', 'rev-parse', 'HEAD'])
        GIT_REVISION = out.strip().decode('ascii')
    except OSError:
        GIT_REVISION = "Unknown"

    return GIT_REVISION

# BEFORE importing setuptools, remove MANIFEST. Otherwise it may not be
# properly updated when the contents of directories change (true for distutils,
# not sure about setuptools).
if os.path.exists('MANIFEST'):
    os.remove('MANIFEST')

# This is a bit hackish: we are setting a global variable so that the main
# numpy __init__ can detect if it is being loaded by the setup routine, to
# avoid attempting to load components that aren't built yet.  While ugly, it's
# a lot more robust than what was previously being used.
builtins.__NUMPY_SETUP__ = True


def get_version_info():
    # Adding the git rev number needs to be done inside write_version_py(),
    # otherwise the import of numpy.version messes up the build under Python 3.
    FULLVERSION = VERSION
    if os.path.exists('.git'):
        GIT_REVISION = git_version()
    elif os.path.exists('numpy/version.py'):
        # must be a source distribution, use existing version file
        try:
            from numpy.version import git_revision as GIT_REVISION
        except ImportError:
            raise ImportError("Unable to import git_revision. Try removing " \
                              "numpy/version.py and the build directory " \
                              "before building.")
    else:
        GIT_REVISION = "Unknown"

    if not ISRELEASED:
        FULLVERSION += '.dev0+' + GIT_REVISION[:7]

    return FULLVERSION, GIT_REVISION


def write_version_py(filename='numpy/version.py'):
    cnt = """
# THIS FILE IS GENERATED FROM NUMPY SETUP.PY
#
# To compare versions robustly, use `numpy.lib.NumpyVersion`
short_version = '%(version)s'
version = '%(version)s'
full_version = '%(full_version)s'
git_revision = '%(git_revision)s'
release = %(isrelease)s

if not release:
    version = full_version
"""
    FULLVERSION, GIT_REVISION = get_version_info()

    a = open(filename, 'w')
    try:
        a.write(cnt % {'version': VERSION,
                       'full_version' : FULLVERSION,
                       'git_revision' : GIT_REVISION,
                       'isrelease': str(ISRELEASED)})
    finally:
        a.close()


def configuration(parent_package='',top_path=None):
    from numpy.distutils.misc_util import Configuration

    config = Configuration(None, parent_package, top_path)
    config.set_options(ignore_setup_xxx_py=True,
                       assume_default_configuration=True,
                       delegate_options_to_subpackages=True,
                       quiet=True)

    config.add_subpackage('numpy')

    config.get_version('numpy/version.py') # sets config.version

    return config


def check_submodules():
    """ verify that the submodules are checked out and clean
        use `git submodule update --init`; on failure
    """
    if not os.path.exists('.git'):
        return
    with open('.gitmodules') as f:
        for l in f:
            if 'path' in l:
                p = l.split('=')[-1].strip()
                if not os.path.exists(p):
                    raise ValueError('Submodule %s missing' % p)


    proc = subprocess.Popen(['git', 'submodule', 'status'],
                            stdout=subprocess.PIPE)
    status, _ = proc.communicate()
    status = status.decode("ascii", "replace")
    for line in status.splitlines():
        if line.startswith('-') or line.startswith('+'):
            raise ValueError('Submodule not clean: %s' % line)


from distutils.command.sdist import sdist
class sdist_checked(sdist):
    """ check submodules on sdist to prevent incomplete tarballs """
    def run(self):
        check_submodules()
        sdist.run(self)


def generate_cython():
    cwd = os.path.abspath(os.path.dirname(__file__))
    print("Cythonizing sources")
    p = subprocess.call([sys.executable,
                          os.path.join(cwd, 'tools', 'cythonize.py'),
                          'numpy/random'],
                         cwd=cwd)
    if p != 0:
        raise RuntimeError("Running cythonize failed!")


def parse_setuppy_commands():
    """Check the commands and respond appropriately.  Disable broken commands.

    Return a boolean value for whether or not to run the build or not (avoid
    parsing Cython and template files if False).
    """
    if len(sys.argv) < 2:
        # User forgot to give an argument probably, let setuptools handle that.
        return True

    info_commands = ['--help-commands', '--name', '--version', '-V',
                     '--fullname', '--author', '--author-email',
                     '--maintainer', '--maintainer-email', '--contact',
                     '--contact-email', '--url', '--license', '--description',
                     '--long-description', '--platforms', '--classifiers',
                     '--keywords', '--provides', '--requires', '--obsoletes']
    # Add commands that do more than print info, but also don't need Cython and
    # template parsing.
    info_commands.extend(['egg_info', 'install_egg_info', 'rotate'])

    for command in info_commands:
        if command in sys.argv[1:]:
            return False

    # Note that 'alias', 'saveopts' and 'setopt' commands also seem to work
    # fine as they are, but are usually used together with one of the commands
    # below and not standalone.  Hence they're not added to good_commands.
    good_commands = ('develop', 'sdist', 'build', 'build_ext', 'build_py',
                     'build_clib', 'build_scripts', 'bdist_wheel', 'bdist_rpm',
                     'bdist_wininst', 'bdist_msi', 'bdist_mpkg')

    for command in good_commands:
        if command in sys.argv[1:]:
            return True

    # The following commands are supported, but we need to show more
    # useful messages to the user
    if 'install' in sys.argv[1:]:
        print(textwrap.dedent("""
            Note: if you need reliable uninstall behavior, then install
            with pip instead of using `setup.py install`:

              - `pip install .`       (from a git repo or downloaded source
                                       release)
              - `pip install numpy`   (last NumPy release on PyPi)

            """))
        return True

    if '--help' in sys.argv[1:] or '-h' in sys.argv[1]:
        print(textwrap.dedent("""
            NumPy-specific help
            -------------------

            To install NumPy from here with reliable uninstall, we recommend
            that you use `pip install .`. To install the latest NumPy release
            from PyPi, use `pip install numpy`.

            For help with build/installation issues, please ask on the
            numpy-discussion mailing list.  If you are sure that you have run
            into a bug, please report it at https://github.com/numpy/numpy/issues.

            Setuptools commands help
            ------------------------
            """))
        return False

    # The following commands aren't supported.  They can only be executed when
    # the user explicitly adds a --force command-line argument.
    bad_commands = dict(
        test="""
            `setup.py test` is not supported.  Use one of the following
            instead:

              - `python runtests.py`              (to build and test)
              - `python runtests.py --no-build`   (to test installed numpy)
              - `>>> numpy.test()`           (run tests for installed numpy
                                              from within an interpreter)
            """,
        upload="""
            `setup.py upload` is not supported, because it's insecure.
            Instead, build what you want to upload and upload those files
            with `twine upload -s <filenames>` instead.
            """,
        upload_docs="`setup.py upload_docs` is not supported",
        easy_install="`setup.py easy_install` is not supported",
        clean="""
            `setup.py clean` is not supported, use one of the following instead:

              - `git clean -xdf` (cleans all files)
              - `git clean -Xdf` (cleans all versioned files, doesn't touch
                                  files that aren't checked into the git repo)
            """,
        check="`setup.py check` is not supported",
        register="`setup.py register` is not supported",
        bdist_dumb="`setup.py bdist_dumb` is not supported",
        bdist="`setup.py bdist` is not supported",
        build_sphinx="""
            `setup.py build_sphinx` is not supported, use the
            Makefile under doc/""",
        flake8="`setup.py flake8` is not supported, use flake8 standalone",
        )
    bad_commands['nosetests'] = bad_commands['test']
    for command in ('upload_docs', 'easy_install', 'bdist', 'bdist_dumb',
                     'register', 'check', 'install_data', 'install_headers',
                     'install_lib', 'install_scripts', ):
        bad_commands[command] = "`setup.py %s` is not supported" % command

    for command in bad_commands.keys():
        if command in sys.argv[1:]:
            print(textwrap.dedent(bad_commands[command]) +
                  "\nAdd `--force` to your command to use it anyway if you "
                  "must (unsupported).\n")
            sys.exit(1)

    # If we got here, we didn't detect what setup.py command was given
    import warnings
    warnings.warn("Unrecognized setuptools command, proceeding with "
                  "generating Cython sources and expanding templates", stacklevel=2)
    return True


def setup_package():
    src_path = os.path.dirname(os.path.abspath(sys.argv[0]))
    old_path = os.getcwd()
    os.chdir(src_path)
    sys.path.insert(0, src_path)

    # Rewrite the version file everytime
    write_version_py()

    metadata = dict(
        name = 'numpy',
        maintainer = "NumPy Developers",
        maintainer_email = "numpy-discussion@python.org",
        description = DOCLINES[0],
        long_description = "\n".join(DOCLINES[2:]),
        url = "http://www.numpy.org",
        author = "Travis E. Oliphant et al.",
        download_url = "http://sourceforge.net/projects/numpy/files/NumPy/",
        license = 'BSD',
        classifiers=[_f for _f in CLASSIFIERS.split('\n') if _f],
        platforms = ["Windows", "Linux", "Solaris", "Mac OS-X", "Unix"],
        test_suite='nose.collector',
        cmdclass={"sdist": sdist_checked},
        python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*',
    )

    if "--force" in sys.argv:
        run_build = True
    else:
        # Raise errors for unsupported commands, improve help output, etc.
        run_build = parse_setuppy_commands()

    from setuptools import setup
    if run_build:
        from numpy.distutils.core import setup
        cwd = os.path.abspath(os.path.dirname(__file__))
        if not os.path.exists(os.path.join(cwd, 'PKG-INFO')):
            # Generate Cython sources, unless building from source release
            generate_cython()

        metadata['configuration'] = configuration
    else:
        # Version number is added to metadata inside configuration() if build
        # is run.
        metadata['version'] = get_version_info()[0]

    try:
        setup(**metadata)
    finally:
        del sys.path[0]
        os.chdir(old_path)
    return


if __name__ == '__main__':
    setup_package()
    # This may avoid problems where numpy is installed via ``*_requires`` by
    # setuptools, the global namespace isn't reset properly, and then numpy is
    # imported later (which will then fail to load numpy extension modules).
    # See gh-7956 for details
    del builtins.__NUMPY_SETUP__
