Sets up the argument parser and returns it

    :returns: the parser
    :rtype: :class:`optparse.OptionParser`
    :raises: None

def setup_parser():
    """Sets up the argument parser and returns it

    :returns: the parser
    :rtype: :class:`optparse.OptionParser`
    :raises: None
    """
    parser = optparse.OptionParser(
        usage="""\
usage: %prog [options] -o <output_path> <module_path> [exclude_path, ...]

Look recursively in <module_path> for Python modules and packages and create
one reST file with automodule directives per package in the <output_path>.

The <exclude_path>s can be files and/or directories that will be excluded
from generation.

Note: By default this script will not overwrite already created files.""")

    parser.add_option('-o', '--output-dir', action='store', dest='destdir',
                      help='Directory to place all output', default='')
    parser.add_option('-d', '--maxdepth', action='store', dest='maxdepth',
                      help='Maximum depth of submodules to show in the TOC '
                      '(default: 4)', type='int', default=4)
    parser.add_option('-f', '--force', action='store_true', dest='force',
                      help='Overwrite existing files')
    parser.add_option('-l', '--follow-links', action='store_true',
                      dest='followlinks', default=False,
                      help='Follow symbolic links. Powerful when combined '
                      'with collective.recipe.omelette.')
    parser.add_option('-n', '--dry-run', action='store_true', dest='dryrun',
                      help='Run the script without creating files')
    parser.add_option('-e', '--separate', action='store_true',
                      dest='separatemodules',
                      help='Put documentation for each module on its own page')
    parser.add_option('-P', '--private', action='store_true',
                      dest='includeprivate',
                      help='Include "_private" modules')
    parser.add_option('-T', '--no-toc', action='store_true', dest='notoc',
                      help='Don\'t create a table of contents file')
    parser.add_option('-E', '--no-headings', action='store_true',
                      dest='noheadings',
                      help='Don\'t create headings for the module/package '
                           'packages (e.g. when the docstrings already contain '
                           'them)')
    parser.add_option('-s', '--suffix', action='store', dest='suffix',
                      help='file suffix (default: rst)', default='rst')
    parser.add_option('-F', '--full', action='store_true', dest='full',
                      help='Generate a full project with sphinx-quickstart')
    parser.add_option('-H', '--doc-project', action='store', dest='header',
                      help='Project name (default: root module name)')
    parser.add_option('-A', '--doc-author', action='store', dest='author',
                      type='str',
                      help='Project author(s), used when --full is given')
    parser.add_option('-V', '--doc-version', action='store', dest='version',
                      help='Project version, used when --full is given')
    parser.add_option('-R', '--doc-release', action='store', dest='release',
                      help='Project release, used when --full is given, '
                      'defaults to --doc-version')
    return parser