[RFC][Merge] repository support

[Robert Collins]

This is the data level support for repositories:
  * finding a repository from a branch
  * using a repository when making a branch if desired
(bzrdir.BzrDir.create_branch_convenience(URL, force_new_repo=False,
force_new_tree=None))


It does not have any UI yet, I've moved onto 'upgrade' support as part
of bzrdir phase 3. If this gets a +1 I'll merge it and hopefully someone
can do a UI :). Or I'll come back and do a minimal UI to get us going. 

If you want to make a repository and play:
import bzrlib.bzrdir
repo = bzrdir.BzrDir.create_repository('.', shared=True)
shared_branch = bzrdir.BzrDir.create_branch_convenience('subdir')

To toggle the creation of new trees inside a repo (i.e. for repos that
you are publishing):
repo.set_make_new_trees(True|False)

To copy an existing branch into a repo so that it uses the shared
storage:
dir = bzrdir.BzrDir.open('old_branch')
dir.clone('path/in/repo')

After that ui commands should just work.

As you can see below, this is primarily corner case testing of new code
paths. I'm asking for a review on this so that we dont get another
mega-branch accumulating :)

robertc at lifelesslap:~/source/baz/repository$ diffstat < repository.patch
 BRANCH.TODO                                                |    1 
 bzrlib/branch.py                                           |   14 
 bzrlib/bzrdir.py                                           |  187
+++++-
 bzrlib/repository.py                                       |  151 +++--
 bzrlib/tests/__init__.py                                   |    4 
 bzrlib/tests/branch_implementations/test_branch.py         |   22 
 bzrlib/tests/bzrdir_implementations/test_bzrdir.py         |  378
++++++++++++-
 bzrlib/tests/repository_implementations/test_repository.py |   39 +
 bzrlib/tests/test_bzrdir.py                                |  161 +++++
 bzrlib/tests/test_repository.py                            |   50 +
 10 files changed, 919 insertions(+), 88 deletions(-)
robertc at lifelesslap:~/source/baz/repository$ wc -l repository.patch
1473 repository.patch


Rob


-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
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