[Svnmerge] svnmerge.py and tags

[JL]

Hi all,

We have two groups doing development and each works on their own 
long-lived codeline (branch).  At the end of each week I merge the new 
code from each group's codeline into the trunk.  Each group then syncs 
their codeline with the trunk the following monday. 

The issue I have is how can I make this work with each group 'tagging' 
their branch to indicate exactly what they wish to have integrated.  For 
example, one group may have more code on their branch than they actually 
want integrated.  To indicate what is to be integrated, they tag their 
codeline.   It is this tag that I wish to integrate into the trunk.  I'm 
having a couple of issues with how to work in this situation with svnmerge

1) How do I initialise the tag/trunk so that it can be integrated using 
svnmerge.py?  The tag is a copy of a branch, not the trunk.

2) If I successfully merge the tag into the trunk, when the development 
groups resyncs their branch with trunk, I'm assuming their will be 
issues since the merge has come via the tag, not the branch.  So the 
--bidirectional support will not work correctly.

At the moment, what I'm doing is manually examining the tag to see what 
was included on it, but then actually doing the merge from the branch 
rather than the tag.

Any help on these would be appreciated.

Regards,
Jeremy