Dealing with vendor branches
----------------------------

$SVNROOT is the full URL, e.g. svn://svn.pspdev.org/psp

Initial import and copy to main branch:
    tar xvzf foo-1.0.tgz
    svn import foo-1.0 $SVNROOT/vendor/foo/current               -m 'initial import'
    svn copy $SVNROOT/vendor/foo/current $SVNROOT/vendor/foo/1.0 -m 'tag foo 1.0'
    svn copy $SVNROOT/vendor/foo/1.0 $SVNROOT/trunk/foo          -m 'copy foo 1.0 to trunk'

Vendor releases foo-1.1, so update the /vendor directory:
    tar xvzf foo-1.1.tgz
    svn_load_dirs -t 1.1 $SVNROOT/vendor/foo current foo-1.1

Then merge foo-1.1 into main branch:
    cd working-copy/trunk/foo
    svn merge $SVNROOT/vendor/foo/1.0 $SVNROOT/vendor/foo/1.1 foo
    svn commit -m 'merge foo 1.1 into trunk'

Noting the version in the log message for the merge is useful for later merges.