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elif globals.keep_chains is not None: action = "remove-all-but-n-full"
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else: command_line_error("Too few arguments")
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globals.backend = backend.get_backend(args[0])
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Examples of URL strings are "scp://user@host.net:1234/path" and
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elif len(args) == 2: # Figure out whether backup or restore
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backup, local_pathname = set_backend(args[0], args[1])