making checkouts, branches and repositories on disk - and the whole naming debate

[Aaron Bentley]

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Robert Collins wrote:
> Say we have a function like status that needs either a branch or a tree.
> 
> If it uses Branch.open_containing, should that skip up past a working
> tree to a  branch ? I.e. if ~ is versioned and ~/source/foo is a
> checkout of something else.
> 
> I thing Branch.open_containing should just skip past working trees
> without branches.

I think the only commands that should do open_containing are those that
operate on a tree or a branch.  They should stop at the first .bzr they
see, and when they need a branch, they should open the one associated
with that .bzr, whether or not it's at the same location.

Aaron
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