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(robertc) Update all users of compare_trees to use Tree.changes_from.

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import tempfile
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import time
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# compatability - plugins import compare_trees from diff!!!
 
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# deprecated as of 0.10
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from bzrlib.delta import compare_trees
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from bzrlib.errors import BzrError
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import bzrlib.errors as errors
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    else:
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        diff_file = internal_diff
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    delta = compare_trees(old_tree, new_tree, want_unchanged=False,
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                          specific_files=specific_files, 
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                          extra_trees=extra_trees, require_versioned=True)
 
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    delta = new_tree.changes_from(old_tree,
 
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        specific_files=specific_files,
 
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        extra_trees=extra_trees, require_versioned=True)
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    has_changes = 0
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    for path, file_id, kind in delta.removed: