Bug 37197 Basepath for relative pathes in JAR-exporter
The basepath for the JAR-exporter is the eclipse-install-directory. I prefer it to be the root of the project (the description is saved in), so that relative pathes end inside the project. Now: <jardesc> <jar path="workspace/projectdir/jar.jar"/> Desired: <jardesc> <jar path="jar.jar"/> Reason: To make the jardesc-files portable for shared projects
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarFileExportOperation.java
Object element= fJarPackage.getElements()[i];
			IResource resource= null;
			if (element instanceof IJavaElement) {
				IJavaElement je= (IJavaElement)element;
				try {
					resource= je.getUnderlyingResource();
				} catch (JavaModelException ex) {
					continue;
				}
			}
			else
				resource= (IResource)element;
			if (resource.getType() == IResource.FILE)
				count++;
			else
				count += getTotalChildCount((IContainer)resource);
		}
		return count;
	}
	
	private int getTotalChildCount(IContainer container) {
		IResource[] members;
		try {
			members= container.members();
		} catch (CoreException ex) {
			return 0;
		}
		int count= 0;
		for (int i= 0; i < members.length; i++) {
			if (members[i].getType() == IResource.FILE)