I have a plone instance containing several plone sites. Whenever I upgrade plone (ex. from 4.2.1 to 4.2.3) there are some addons which need to be updated as well. My own local products need to be updated from time to time as well.
I usually go into the zmi quickinstaller folder reinstall them one by one. However having 18 plone sites in this particular plone instance means that now I have to update the addons for every site manually.
Is there a product or script which would automate the update of products/addons?