A module depends on the node seats that apply its resources (hq ADR 0207)

Seed node-package-manager and node-container-runtime. Derive each module's
dependencies from its declared service, package and container resources;
judge them over the node's whole set, exempting the foundation. Refuse at
assign (several modules may go on as one act) and at unassign of the last
holder; report at composition in status, behind one switch.

cmd/mesh-controller/modules.go

@@ -334,8 +334,10 @@ func moduleCommand(ctx context.Context, args []string) error {
 }
 
 func assignCommand(ctx context.Context, verb string, args []string) error {
-	if len(args) != 2 {
-		return fmt.Errorf("%s <node> <module>", verb)
+	// Several modules in one act (novox/hq ADR 0207): holders that depend on each other — the
+	// service manager and the package manager — can only go on, or come off, together.
+	if len(args) < 2 {
+		return fmt.Errorf("%s <node> <module> [<module>…]", verb)
 	}
 	open, err := openStores(ctx)
 	if err != nil {
@@ -349,7 +351,7 @@ func assignCommand(ctx context.Context, verb string, args []string) error {
 	if verb == "unassign" {
 		act = unassign
 	}
-	said, err := act(ctx, open, args[0], args[1])
+	said, err := act(ctx, open, args[0], args[1:]...)
 	if said != "" {
 		fmt.Println(said)
 	}