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We we simplify the dependency graph, we try to remove so-called mandatory dependencies from each package, and for each mandatory that was thus removed, reattach it to the root-package of the graph. This was made so that mandatory dependencies (which are dependencies of all packages, or at least of a lot of packages) do not clutter the dependency graph, but that they are still shown in the graph, as dependencies of the root package. However, these mandatory dependencies are only _direct_ dependencies. As such, it does not make sense to reattach a mandatory dependency when doing a reverse graph. Worse, it can actually be incorrect. For example, 'skeleton' is a mandatory dependency, and as such is removed from all packages. But when doing a reverse graph, skeleton is now in the dependency chain of, e.g. skeleton-init-none; it should then not be removed. In short: the notion of mandatory dependencies does not make sense in the case of a reverse graph. Consequently, skip over the mandatory dependency removal when doing a reverse graph. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>