Non-unique tag names across projects that should not be merged during conversion to svn

Hi,

I have a repository where the tag names used across projects are not unique.
But during migration to svn using cvs2svn, I would like to have one tag in
svn for each tag in each project. From reading through the mailing list and
looking at documentation, I don't see any straight forward way to do this.

Let me give an example of the situation. I have two projects projA and projB
in CVS. There would be tags named Build-1, Build-2, etc. in projA, also tags
Build-1, Build-2, etc. in projB. When I run cvs2svn with -symbol-default at
'heuristic', the migration tool assumes that the tags used in projA and
projB which have the same name are the same, and merges them and creates one
tag each for Build-1, Build-2, etc. in svn.

What I need is something like ProjA-Build-1, ProjB-Build-1, ProjA-Build-2,
ProjB-Build-2, etc. in svn. 'heuristic' doesn't do that. Seems like the
other symbol-default options (strict, branch, tag) are not going to be
helpful here either.

After digging a bit into the code, I see that there are classes named
SymbolMapper, SubtreeSymbolMapper, which seem relevant. Especially
SubtreeSymbolMapper which seems very promising. Here is the documentation in
that class:

The user has to specify a CVS repository path (a filename or
  directory) and the original symbol name.  All symbols under that
  path will be renamed to the specified new name (which can be None if
  the symbol should be ignored).  The mappings can be set via a
  constructor argument or by calling __setitem__().  Only the most
  specific rule is applied."""
So, my question is, am I on the right track? If so, how do I use this class?
Is there something I need to add to the options file to make the migration
tool use this?

Thanks,
Vasanth

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