Branches without working trees

[Aaron Bentley]

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John A Meinel wrote:
> This means I moved "WorkingTree.pull()" back into Branch.

Thanks.

> I also allow for a separate .bzr/x-push-target location. For some
> working models, you might have a default upstream, with a different
> default push location.

I think we should start using a single per-tree consiguration file for this.

> We could also do something like --friends, which contains a list of the
> recent push/pull locations. Then it would look like:
> 
> bzr merge --friends=1
> bzr push --friends=2
> bzr missing # The primary friend is the parent

I have found this style useful.  In Fai, merge will try each friend
until it finds one with changes, and merges it.

> This is getting pretty close to having branch aliases, which might be a
> better solution.

Aliases are nice, but I find that default locations are nicer.

Wildcard support in merge could be good.  It would use the friends list
or a list of 'seen branches' in ~/.bazaar
$ cd bzr.ab
$ bzr merge *integration
using people.ubuntu.com/~robertc/baz2.0/integration
0 conflicts encountered.

Aaron
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