As part of Tycho's eclipserun plugin, you need to specify a repository for
Tycho (and p2) to fetch components from. Tycho starts off with a minimal
set, and then you can add more IUs for constructing a minimal "eclipse
runtime" that is needed for your task.
In M2, we introduced a bug that
Compiled 2015-10-14T12:07
build.eclipse.org
-> Usage exceeding 1GB for: Hudson master jobs and workspace (2015-10-14T10:00)
2.8G papyrus-trunk-nightly
1.7G papyrus-trunk-extra-nightly
1.5G emf-cdo-integration
-> Usage exceeding 1GB for: /shared (1000G capacity)