Run p4a commands. Args must come after --, or
        use --alias to make an alias

def cmd_p4a(self, *args):
        '''
        Run p4a commands. Args must come after --, or
        use --alias to make an alias
        '''
        self.check_requirements()
        self.install_platform()
        args = args[0]
        if args and args[0] == '--alias':
            print('To set up p4a in this shell session, execute:')
            print('    alias p4a=$(buildozer {} p4a --alias 2>&1 >/dev/null)'
                  .format(self.targetname))
            sys.stderr.write('PYTHONPATH={} {}\n'.format(self.pa_dir, self._p4a_cmd))
        else:
            self._p4a(' '.join(args) if args else '')