NODES table - conditional compilation for op_depth

Philip and I have started implementing op_depth in the NODES table, but
we soon found there is more to do than simply calculating a value here
and there.

("Implementing op_depth" means enabling multiply nested
copies/replacements/adds/deletes etc., with the ability to revert at
each level.)

In the meantime, some tests were breaking, so we have made the full
op_depth support conditional on SVN_WC__OP_DEPTH.

Why? The interim 0/1/2 op_depth values have been working OK in the
limited context of the amount of nesting that BASE+WORKING supports. We
might want to make a transition from BASE_NODE/WORKING_NODE to NODES
first, before enabling the full op_depth support. That is probably the
main reason why this further conditional is useful. The alternative
would be to complete op_depth support before switching the default build
over to NODES.

Any concerns about working within SVN_WC__OP_DEPTH?

- Julian
Received on 2010-09-27 16:00:54 CEST