Best way to check if a directory is an brz branch

[John Arbash Meinel]

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> 
> I could change BranchEmailer to take a branch as an argument and not its
> path I suppose. This is not a change I want to do because I think it
> makes more sense how it is now.

Perhaps, though I think BranchEmailer is just going to open them up
later anyway.

However, for your initial issue, there is:

bzrlib.bzrdir.BzrDir.find_branches(transport)

I would guess that actually returns real Branch objects, but it does all
the walking for you.

> 
> But it's also easy to think of uses for such a function. Imagine a
> plugin that lists all branches below a directory recursively printing
> them to the terminal. It does not need to open any of these branches in
> order to do so. It just needs to print their paths.
> 
> Cheers,
> 
> Nick

'bzr branches' (from bzrtools) already does that.

To know if it is a real branch or not you pretty much need to do all the
work to open it. So why not open it?

John
=:->
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