Rewriting the svn:author revprop at commit time

Hi, I wonder if anyone could help me answer a question about rewriting the
svn:author revision property?

I have a large number of users who authenticate with sensible logins like
'bert.jones', and who leave nice readable audit trails in the svn log.

For reasons that I can't do much about, I have a small number of users who
authenticate with annoying alphanumeric logins like 'xyzzy42'. These users
leave audit trails that are not so easy to read.

I would _like_ to rewrite the svn:author revision property at commit time,
to convert the annoying names into sensible ones.

Can this be done safely from a post-commit hook? That is, I would use
'svnlook propget repo -r XXX --revprop svn:author' to examine the
svn:author property, then do an 'svn ps -r XXX --revprop svn:author NEWNAME'
to rewrite it if it is one of the annoying ones.

regards,

--
Jon Ashley
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