Process the command line.

def get_options(self):
        """Process the command line.
        """
        args = self.parse_options(self.args)

        if args:
            self.directory = args[0]

        if self.develop:
            self.skiptag = True
        if not self.develop:
            self.develop = self.defaults.develop
        if not self.develop:
            self.infoflags = self.setuptools.infoflags

        if not self.formats:
            self.formats = self.defaults.formats

        for format in self.formats:
            if format == 'zip':
                self.distributions.append(('sdist', ['--formats="zip"']))
            elif format == 'gztar':
                self.distributions.append(('sdist', ['--formats="gztar"']))
            elif format == 'egg':
                self.distributions.append(('bdist', ['--formats="egg"']))
            elif format == 'wheel':
                self.distributions.append(('bdist_wheel', []))

        if not self.distributions:
            self.distributions.append(('sdist', ['--formats="zip"']))

        if self.list:
            self.list_locations()

        if not self.locations:
            self.locations.extend(self.locations.get_default_location())

        if not (self.skipregister and self.skipupload):
            if not (self.get_skipregister() and self.get_skipupload()):
                self.locations.check_empty_locations()
            self.locations.check_valid_locations()

        if len(args) > 1:
            if self.urlparser.is_url(self.directory):
                self.branch = args[1]
            elif self.urlparser.is_ssh_url(self.directory):
                self.branch = args[1]
            else:
                err_exit('mkrelease: invalid arguments\n%s' % USAGE)

        if len(args) > 2:
            err_exit('mkrelease: too many arguments\n%s' % USAGE)