This note is primarily for those that build against the Eclipse Platform's composite repository at .../eclipse/updates/4.3milestones after the Platform milestone is delivered. While that's not a recommend practice, I get the impression lots of people do it. For everyone else, you will just find this information very interesting, I'm sure, but it will not effect you directly.
Traditionally, we leave each milestone "connected" to the composite. This allows rolling back an installation. But, there has been so many changes since M5, due to the build technology used and other changes since Juno SR2, that we plan to provide only M6 at that composite site, for M6. This will help "force" issues to appear, if there are any, rather than waiting until the end of the release and then everyone being surprised. Many details are in bug 395030 [1] Bug 395030 - Disconnect old milestone repos for M6 But, I'll summarize here: There are 6 or 12 changes related to things we intentionally removed, that would be a factor regardless of the build technology used (such as the "org.junit4" change many of you already discovered). There are 6 or 12 known issues related to things missing from the new build that we plan to correct by M7 (mostly missing *.source bundles). But, there are several hundred changes related to the "low level" p2 IUs (tooling* and *_root IUs) that are involved in building products or RCP apps for specific platforms or Operating Systems. We are assuming that the exact names of these IUs don't really matter to anyone, and that everything needed really is there and working, just named differently ... but ... that's the reason we plan on forcing the issue by providing only M6 at that composite repo. More details are in the bug so you can read ahead of time, but let us know, in that bug or a new one, if there are issues encountered. We will of course leave the older repos (M1 to M5a) around in case an "emergency work around" is needed for the milestone, but we'll cross that bridge if or when we get to it. We expect things to go smoothly, we just want to make sure. Thanks, [1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=395030
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