New vendor drops on vendor branch - but how?

Hi!

I'm experimenting with vendor branches and subversion, trying to
understand the documentation. I'm a bit confused on the procedure when
it comes to doing new vendor drops.

Quoting
http://svnbook.red-bean.com/nightly/en/svn.advanced.vendorbr.html:

>To perform this upgrade, we checkout a copy of our vendor branch, and
>replace the code in the current directory with the new libcomplex 1.1
>source code. We quite literally copy new files on top of existing
>files, perhaps exploding the libcomplex 1.1 release tarball atop our
>existing files and directories. The goal here is to make our current
>directory contain only the libcomplex 1.1 code, and to ensure that all
>that code is under version control. Oh, and we want to do this with as
>little version control history disturbance as possible.
>
>After replacing the 1.0 code with 1.1 code, svn status will show files
>with local modifications as well as, perhaps, some unversioned or
>missing files. If we did what we were supposed to do, the unversioned
>files are only those new files introduced in the 1.1 release of
>libcomplex\u2014we run svn add on those to get them under version
>control. The missing files are files that were in 1.0 but not in 1.1,
>and on those paths we run svn delete. Finally, once our current
>working copy contains only the libcomplex 1.1 code, we commit the
>changes we made to get it looking that way.

What I don't understand in this instruction is how this is going to
work for files that have been removed in the new release
libcomplex. If the file foo/bar.c exists in the svn working-copy and I
explode a tarball which _doesn't_ contain foo/bar.c on top of the
working-copy, there will still be a foo/bar.c in the working-copy, and
'svn status' won't show it as missing.

In order to get the desired behaviour, I'd need to clean the working
copy of all files and directories. But as far as I can see, there's no
good way to do that without confusing svn, or is there? If I do a 'rm
-r' in my working-copy, svn will have no idea about what files were
and weren't available in subdirectories, and it will also complain
about files being missing if I try to tell it to move a file from one
location to another.

I know about the svn_load_dirs.pl script, but I'd still like to know
how to do a vendor drop manually.

Any thoughts on this?

Thanks,
\EF

(Sorry if this message arrives twice - tried to post via gmane
yesterday, but the message didn't come through)

-- 
Erik Forsberg                OpenSource-based Thin Client Technology
Systems Analyst/Developer    Phone: +46-13-21 46 00    
Cendio AB    	             Web: http://www.cendio.com
		             
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