Generator stream gitignore filter python

gitignore-filter.py

def gitignore2list(directory):
    """Get a list of gitignore entries from a file."""
    try:
        with open('{}/.gitignore'.format(directory), 'r+') as ignorefile:
            yield (x.rstrip() for x in ignorefile.read().split('\n')
                   if x and not x.startswith('#'))
    except OSError:
        yield None


def ignore(to_ignore):
    """Return a customized filtering generator that will filter based on a list of given names."""
    def _f(name):
        for item in to_ignore:
            # Filter star args (e.g *.pyc)
            if item.startswith('*.'):
                if name.endswith(item[1:]):
                    yield False
            if name.endswith(item):
                yield False
        yield True
    return _f


def gitignore(path):
    """Create a function to filter based on gitignore file entries.

    Note: wildcard/regexes are not supported.
    """
    return ignore(gitignore2list(path))