Create an unversioned copy of a tree.

        usage:
            1. export [-r REV] URL [PATH]
            2. export [-r REV] PATH1 [PATH2]
        
        1. Exports a clean directory tree from the repository specified by
           URL, at revision REV if it is given, otherwise at HEAD, into
           PATH. If PATH is omitted, the last component of the URL is used
           for the local directory name.
        
        2. Exports a clean directory tree from the working copy specified by
           PATH1, at revision REV if it is given, otherwise at WORKING, into
           PATH2.  If PATH2 is omitted, the last component of the PATH1 is used
           for the local directory name. If REV is not specified, all local
           changes will be preserved, but files not under version control will
           not be copied.

        ${cmd_option_list}

def do_export(self, subcmd, opts, *args):
        """Create an unversioned copy of a tree.

        usage:
            1. export [-r REV] URL [PATH]
            2. export [-r REV] PATH1 [PATH2]
        
        1. Exports a clean directory tree from the repository specified by
           URL, at revision REV if it is given, otherwise at HEAD, into
           PATH. If PATH is omitted, the last component of the URL is used
           for the local directory name.
        
        2. Exports a clean directory tree from the working copy specified by
           PATH1, at revision REV if it is given, otherwise at WORKING, into
           PATH2.  If PATH2 is omitted, the last component of the PATH1 is used
           for the local directory name. If REV is not specified, all local
           changes will be preserved, but files not under version control will
           not be copied.

        ${cmd_option_list}
        """
        print "'svn %s' opts: %s" % (subcmd, opts)
        print "'svn %s' args: %s" % (subcmd, args)