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if self.branch_path != "":
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# TODO: Set NULL_REVISION in SVN_PROP_BZR_BRANCHING_SCHEME
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repos.transport.mkdir(self.branch_path.strip("/"))
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# Bail out if there are already revisions in this repository
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raise AlreadyBranchError(self.root_transport.base)
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branch = SvnBranch(self.root_transport.base, repos, self.branch_path)