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Return the current branch, or None if HEAD isn't at a branch
(e.g. detached HEAD).
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Return (sha_or_none, is_branch), where sha_or_none is a commit hash
if the revision names a remote branch or tag, otherwise None.
Args:
dest: the repository directory.
rev: the revision name.
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Resolve a revision to a new RevOptions object with the SHA1 of the
branch, tag, or ref if found.
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rev_options: a RevOptions object.
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Return whether the current commit hash equals the given name.
Args:
dest: the repository directory.
name: a string name.
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Return URL of the first remote encountered.
Raises RemoteNotFoundError if the repository does not have a remote
url configured.
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Return the path to setup.py, relative to the repo root.
Return None if setup.py is in the repo root.
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Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
That's required because although they use SSH they sometimes don't
work with a ssh:// scheme (e.g. GitHub). But we need a scheme for
parsing. Hence we remove it again afterwards and return it as a stub.
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