Bug 267173 [Linked Resources] Data loss when replacing one linked resource with another using drag and drop
Build ID: HEAD Steps To Reproduce: I've got a Group with some links to folders. If I drag and drop a linked folder from another workspace path, into the group, I get the dialog saying: "project/group/linked_folder" already exists. Do you wish to overwrite? Folder contents will be merged existing files will be overwritten. In my case I had selected a bunch of linked resources to drag into the group, (some of which are identical to the links already in the group). So I pressed "Yes To All". The result is an error: "Resource is out of sync with the filesystem: ..." The move operation has actually tried to replace a file with itself, and this fails (and the resulting file is empty...). I find this completely counter-intuitive. If I'm replacing a linked resource with another, I don't want a recursive merge. I want to replace the link, just like aliases in a filesystem...
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/WorkspaceUndoUtil.java
resourcesAtDestination.add(existing);
					} else {
						
						
						ResourceDescription[] deleted = delete(
								new IResource[] { existing },
								new SubProgressMonitor(monitor, 0), uiInfo,
								false);
						reverseDestinations.add(source.getFullPath());
						source.move(destinationPath, IResource.SHALLOW
								| IResource.KEEP_HISTORY,
								new SubProgressMonitor(monitor, 1));
						
						resourcesAtDestination.add(getWorkspace().getRoot()
								.findMember(destinationPath));
						for (int j = 0; j < deleted.length; j++) {
							overwrittenResources.add(deleted[j]);
						}
					}
				} else {
					
					
					reverseDestinations.add(source.getFullPath());
					
					IPath parentPath = destination;
					if (pathIncludesName) {
						parentPath = destination.removeLastSegments(1);
					}
					IContainer generatedParent = generateContainers(parentPath);
					source.move(destinationPath, IResource.SHALLOW