Should you need to regen a composite update site to include some list of its child folders, there’s a script for that.
https://github.com/jbosstools/jbosstools-build-ci/blob/master/util/cleanup/jbosstools-cleanup.sh#L47
Example usage:
cd /tmp
wget https://raw.githubusercontent.com/jbosstools/jbosstools-build-ci/master/util/cleanup/jbosstools-cleanup.sh
./jbosstools-cleanup.sh --regen-metadata-only --no-subdirs \
--link 5 -d updates/m2e-extensions/m2e-apt
Result: