QotD    "To be or not to be" – Shakespeare

Object class>>systemStartupDependsOnMe

"If it does, then override this method
     to notify yourself of at least one other class
     whose startup initialization you are certain you depend on.

 Something like

      self  startupDependsOn: aClassOrSomeClasses; 
            startupDependsOn: aClassOrSomeClasses2

"

^self startupDependsOn: #()

Some class>>systemStartupDependsOnMe

             self startupDependsOn: aClassOrSomeClasses

                     ; startupDependsOn: aClassOrSomeClasses2

                     ; ...


At startup, we send #systemStartupDependsOnMe

to all the classes which define it.


We then do a topological sort of the identified dependencies,

and send #initialize or whatever to each class in the resulting list.


If the ordering proves insufficient, we add dependency

corrections as and where they are discovered, and keep adding new ones

until we get a partial ordering that works.