This is my project catalog for the Eclipse Installer.
Add it to your Installer by adding this line to eclipse-inst.ini:
-Doomph.redirection.arlosProjectCatalog=index:/redirectable.projects.setup->https://arlol.github.io/eclipse-projects/eclipse-projects.setup
On macOS this does the trick:
echo "-Doomph.redirection.arlosProjectCatalog=index:/redirectable.projects.setup->https://arlol.github.io/eclipse-projects/eclipse-projects.setup" >> /Applications/Eclipse\ Installer.app/Contents/Eclipse/eclipse-inst.ini