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merge bzr.dev

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bzrlib/uncommit.py
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        branch.lock_write()
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        unlockable.append(branch)
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        pending_merges = []
 
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        master = branch.get_master_branch()
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        if master is not None:
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            master.lock_write()
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        files_to_remove = []
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        for r in range(revno-1, len(rh)):
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            rev_id = rh.pop()
 
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            rev = branch.repository.get_revision(rev_id)
 
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            # When we finish popping off the pending merges, we want
 
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            # them to stay in the order that they used to be.
 
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            # but we pop from the end, so reverse the order, and
 
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            # then get the order right at the end
 
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            pending_merges.extend(reversed(rev.parent_ids[1:]))
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            if verbose:
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                print 'Removing revno %d: %s' % (len(rh)+1, rev_id)
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            branch.set_revision_history(rh)
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            if tree is not None:
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                tree.set_last_revision(branch.last_revision())
 
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                pending_merges.reverse()
 
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                tree.set_pending_merges(pending_merges)
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    finally:
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        for item in reversed(unlockable):
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            item.unlock()