Heuristics for merges

Hi,

I'm given a working copy and a merge from URL.

Is there any easy heuristics I can implement using the SVN 1.7 APIs to guide my user whether a sync-merge or a reintegrate merge is appropriate? I want to display a warning message when the merge will most likely fail.

I know that SVN 1.8 does similar calculations internally to implement "symmetric merge", but I'm just looking for a simple, fast heuristic using the public APIs, covering the basic use cases (we don't allow subtree merges or switches of subtrees, for example).

Best regards

Markus Schaber

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