Say a module assigned and left out of its machine's composition as a condition (issue 380)

A push leaves out a module whose settings do not compose and sends the rest,
which is right, but only plan said so: nfs-server ran nowhere for days while
the operator believed it ran. The self-check now raises needs-operator for a
setting nobody gave, naming the setting and the command, and left-out for any
other cause; both warnings, cleared once the module composes or is unassigned.
status and node show list the same modules as assigned, not applied.

cmd/mesh-controller/nodes.go

@@ -44,7 +44,7 @@ func nodeCommand(ctx context.Context, args []string) error {
 		if len(args) != 2 {
 			return errors.New("node show <name>")
 		}
-		return showNode(ctx, inv, args[1])
+		return showNode(ctx, open, args[1])
 	case "add":
 		return addNode(ctx, inv, args[1:])
 
@@ -787,7 +787,8 @@ func roughly(d time.Duration) string {
 //
 // It is also where "what should it be configured as" is read. The same line that gates an
 // assignment carries `card1-DP-1`, and a person composing settings for that machine needs it.
-func showNode(ctx context.Context, inv *inventory.Inventory, name string) error {
+func showNode(ctx context.Context, stored *stores, name string) error {
+	inv := stored.inventory
 	node, err := inv.NodeByName(ctx, name)
 	if err != nil {
 		return err
@@ -889,6 +890,17 @@ func showNode(ctx context.Context, inv *inventory.Inventory, name string) error
 	if len(assigned) > 0 {
 		fmt.Printf("\n  assigned: %s\n", strings.Join(assigned, ", "))
 	}
+	// And which of them a push leaves out, and why (novox/hq issue 380): judged as the push judges it, the same
+	// reason its condition says. Not computable is said, never read as "all applied".
+	plan, settings, err := planFor(ctx, stored, name)
+	switch {
+	case err != nil:
+		fmt.Printf("\n  whether a push leaves any assigned module out is NOT known: %s\n", oneLine(err.Error()))
+	default:
+		for _, line := range notAppliedLines(name, leftOutOf(plan, settings, node.Adopted)) {
+			fmt.Println(line)
+		}
+	}
 	return nil
 }