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SYNOPSIS

 $0 [--repo /my/repo || mayi@127.0.0.1::pkg/foo] [--link /my/link] [--version release-x.x.x]

    [--path /my/path ( default $repo/data ) ]
    [--keep 10 (default 10)]
    [--taropt '-m']
    [--rsyncopt '-v']
    [--stage]

    Version 'release-x.x.x' and 'rollback:release-x.x.x' are the same
    Version 'comeback:release-x.x.x' rollback to before release-x.x.x
    Version backup refers to the $link.backup
    Version backup\d* refers to the $link.backup\d*