+#ifdef ENABLE_LINKED_PKGS
+/* Check if this is a linked pseudo package. As it is linked, we do not need an update/feature rule */
+static inline int
+is_linked_pseudo_package(Solver *solv, Solvable *s)
+{
+ Pool *pool = solv->pool;
+ if (solv->instbuddy && solv->instbuddy[s - pool->solvables - solv->installed->start])
+ {
+ const char *name = pool_id2str(pool, s->name);
+ if (strncmp(name, "pattern:", 8) == 0 || strncmp(name, "application:", 12) == 0)
+ return 1;
+ }
+ return 0;
+}
+#endif
+
+void
+solver_addfeaturerule(Solver *solv, Solvable *s)
+{
+ Pool *pool = solv->pool;
+ int i;
+ Id p;
+ Queue qs;
+ Id qsbuf[64];
+
+#ifdef ENABLE_LINKED_PKGS
+ if (is_linked_pseudo_package(solv, s))
+ {
+ solver_addrule(solv, 0, 0, 0); /* no feature rules for those */
+ return;
+ }
+#endif
+ queue_init_buffer(&qs, qsbuf, sizeof(qsbuf)/sizeof(*qsbuf));
+ p = s - pool->solvables;
+ policy_findupdatepackages(solv, s, &qs, 1);
+ if (solv->dupmap_all || (solv->dupinvolvedmap.size && MAPTST(&solv->dupinvolvedmap, p)))
+ {
+ if (!dup_maykeepinstalled(solv, s))
+ {
+ for (i = 0; i < qs.count; i++)
+ {
+ Solvable *ns = pool->solvables + qs.elements[i];
+ if (ns->repo != pool->installed || dup_maykeepinstalled(solv, ns))
+ break;
+ }
+ if (i == qs.count)
+ {
+ solver_addrule(solv, 0, 0, 0); /* this is an orphan */
+ queue_free(&qs);
+ return;
+ }
+ }
+ }
+ if (qs.count > 1)
+ {
+ Id d = pool_queuetowhatprovides(pool, &qs);
+ queue_free(&qs);
+ solver_addrule(solv, p, 0, d); /* allow update of s */
+ }
+ else
+ {
+ Id d = qs.count ? qs.elements[0] : 0;
+ queue_free(&qs);
+ solver_addrule(solv, p, d, 0); /* allow update of s */
+ }
+}
+