#!/usr/bin/env python
"""SciPy: Scientific Library for Python

SciPy (pronounced "Sigh Pie") is open-source software for mathematics,
science, and engineering. The SciPy library
depends on NumPy, which provides convenient and fast N-dimensional
array manipulation. The SciPy library is built to work with NumPy
arrays, and provides many user-friendly and efficient numerical
routines such as routines for numerical integration and optimization.
Together, they run on all popular operating systems, are quick to
install, and are free of charge.  NumPy and SciPy are easy to use,
but powerful enough to be depended upon by some of the world's
leading scientists and engineers. If you need to manipulate
numbers on a computer and display or publish the results,
give SciPy a try!

"""

DOCLINES = __doc__.split("\n")

import os
import sys
import subprocess


if sys.version_info[:2] < (2, 6) or (3, 0) <= sys.version_info[0:2] < (3, 2):
    raise RuntimeError("Python version 2.6, 2.7 or >= 3.2 required.")

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

CLASSIFIERS = """\
Development Status :: 4 - Beta
Intended Audience :: Science/Research
Intended Audience :: Developers
License :: OSI Approved
Programming Language :: C
Programming Language :: Python
Programming Language :: Python :: 3
Topic :: Software Development
Topic :: Scientific/Engineering
Operating System :: Microsoft :: Windows
Operating System :: POSIX
Operating System :: Unix
Operating System :: MacOS

"""

MAJOR = 0
MINOR = 15
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']:
            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 distutils, remove MANIFEST. distutils doesn't properly
# update it when the contents of directories change.
if os.path.exists('MANIFEST'):
    os.remove('MANIFEST')

# This is a bit hackish: we are setting a global variable so that the main
# scipy __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.__SCIPY_SETUP__ = True

def get_version_info():
    # Adding the git rev number needs to be done inside
    # write_version_py(), otherwise the import of scipy.version messes
    # up the build under Python 3.
    FULLVERSION = VERSION
    if os.path.exists('.git'):
        GIT_REVISION = git_version()
    elif os.path.exists('scipy/version.py'):
        # must be a source distribution, use existing version file
        # load it as a separate module to not load scipy/__init__.py
        import imp
        version = imp.load_source('scipy.version', 'scipy/version.py')
        GIT_REVISION = version.git_revision
    else:
        GIT_REVISION = "Unknown"

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

    return FULLVERSION, GIT_REVISION


def write_version_py(filename='scipy/version.py'):
    cnt = """
# THIS FILE IS GENERATED FROM SCIPY SETUP.PY
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()

try:
    from sphinx.setup_command import BuildDoc
    HAVE_SPHINX = True
except:
    HAVE_SPHINX = False

if HAVE_SPHINX:
    class ScipyBuildDoc(BuildDoc):
        """Run in-place build before Sphinx doc build"""
        def run(self):
            ret = subprocess.call([sys.executable, sys.argv[0], 'build_ext', '-i'])
            if ret != 0:
                raise RuntimeError("Building Scipy failed!")
            BuildDoc.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'),
                          'scipy'],
                         cwd=cwd)
    if p != 0:
        raise RuntimeError("Running cythonize failed!")


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('scipy')
    config.add_data_files(('scipy','*.txt'))

    config.get_version('scipy/version.py')

    return config

def setup_package():

    # Rewrite the version file every time
    write_version_py()

    if HAVE_SPHINX:
        cmdclass = {'build_sphinx': ScipyBuildDoc}
    else:
        cmdclass = {}

    # Figure out whether to add ``*_requires = ['numpy']``.
    # We don't want to do that unconditionally, because we risk updating
    # an installed numpy which fails too often.  Just if it's not installed, we
    # may give it a try.  See gh-3379.
    build_requires = []
    try:
        import numpy
    except:
        build_requires = ['numpy>=1.5.1']

    metadata = dict(
        name = 'scipy',
        maintainer = "SciPy Developers",
        maintainer_email = "scipy-dev@scipy.org",
        description = DOCLINES[0],
        long_description = "\n".join(DOCLINES[2:]),
        url = "http://www.scipy.org",
        download_url = "http://sourceforge.net/projects/scipy/files/scipy/",
        license = 'BSD',
        cmdclass=cmdclass,
        classifiers=[_f for _f in CLASSIFIERS.split('\n') if _f],
        platforms = ["Windows", "Linux", "Solaris", "Mac OS-X", "Unix"],
        test_suite='nose.collector',
        setup_requires = build_requires,
        install_requires = build_requires,
    )

    if len(sys.argv) >= 2 and ('--help' in sys.argv[1:] or
            sys.argv[1] in ('--help-commands', 'egg_info', '--version',
                            'clean')):
        # For these actions, NumPy is not required.
        #
        # They are required to succeed without Numpy for example when
        # pip is used to install Scipy when Numpy is not yet present in
        # the system.
        try:
            from setuptools import setup
        except ImportError:
            from distutils.core import setup

        FULLVERSION, GIT_REVISION = get_version_info()
        metadata['version'] = FULLVERSION
    else:
        if len(sys.argv) >= 2 and sys.argv[1] == 'bdist_wheel':
            # bdist_wheel needs setuptools
            import setuptools

        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

    setup(**metadata)

if __name__ == '__main__':
    setup_package()
