def _get_meta_var(name, data, callback_handler=None):

    import re

    matches = re.compile(r'(?:%s)\s*=\s*(.*)' % name).search(data)

    if matches:

        if not callable(callback_handler):

            callback_handler = lambda v: v

        return callback_handler(eval(matches.groups()[0]))

_meta = open(os.path.join(here, 'kallithea', '__init__.py'), 'r')

_metadata = _meta.read()

_meta.close()

callback = lambda V: ('.'.join(map(str, V[:3])) + '.'.join(V[3:]))

__version__ = _get_meta_var('VERSION', _metadata, callback)

__license__ = _get_meta_var('__license__', _metadata)

__author__ = _get_meta_var('__author__', _metadata)

__url__ = _get_meta_var('__url__', _metadata)

# defines current platform

__platform__ = platform.system()

is_windows = __platform__ in ['Windows']

requirements = [

    "gearbox >= 0.1.0, < 1",

    "waitress >= 0.8.8, < 1.4",

    "WebOb >= 1.8, < 1.9",

    "backlash >= 0.1.2, < 1",

    "TurboGears2 >= 2.4, < 2.5",

    "tgext.routes >= 0.2.0, < 1",

    "Beaker >= 1.10.1, < 2",

    "WebHelpers2 >= 2.0, < 2.1",

    "FormEncode >= 1.3.1, < 1.4",

    "SQLAlchemy >= 1.1, < 1.4",

    "Mako >= 0.9.1, < 1.1",

    "Pygments >= 2.2.0, < 2.5",

    "Whoosh >= 2.7.1, < 2.8",

    "celery >= 3.1, < 4.0", # TODO: celery 4 doesn't work

    "Babel >= 1.3, < 2.8",

    "python-dateutil >= 2.1.0, < 2.9",

    "Markdown >= 2.2.1, < 3.2",

    "docutils >= 0.11, < 0.15",

    "URLObject >= 2.3.4, < 2.5",

    "Routes >= 2.0, < 2.5",

    "dulwich >= 0.19.0, < 0.20",

    "mercurial >= 5.1, < 5.3",

    "decorator >= 4.2.1, < 4.5",

    "Paste >= 2.0.3, < 3.1",