The Blueprint Merge Tool was added in 4.7. Since then, there appears to be no further documentation on the tool of any kind. I can find bug reports, and that’s it. Is this thing orphaned right now or something? I’ve spent a couple of hours trying to use it but the only thing it has managed to do is create blueprints that crash my editor and force me to revert back to what’s in source control. Even the UI looks completely unfinished. I’m prompted to select three blueprints and given ZERO indication about what those three are. Is it blueprintA + blueprintB = NewBP? That seems likely since you cannot start to merge any of them set to none. It refers to a source and target, but, does not ever indicate which is which. There is a previous and next button, and a previous conflict and next conflict button that seem to have identical functionality. However, there appears to be no functionality for settling this conflicts. There appears to be two buttons dedicated to cancelling, Accept Target and Cancel, and two buttons that lead to stomping out one of your BPs in favor of the other, Accept Source and Finish Merge.
Am I missing something? I really hope I am, because, this tool would be incredibly valuable and some documentation would be even more appreciated.
edit: it occurs to me this tool may not be what I think it is. I assumed it would be a way to merge together two duplicates of a BP, but, I’m now under the assumption it’s just a feature related to Git. Again, some documentation would have cleared up that confusion if that’s the case.