C#: Check if a component was created with [RequireComponen (typeof (Type))]

Unity Engine
1

I am looping through, and evaluating all the components on GameObjects and I need to check to see if a component was added or dependent on [RequireComponen (typeof (Type))] from another component. I assume I will be needing to use some reflection to get at the attribute.

There is 2 ways I see this happening. Check if the current component I am evaluating is required by another, or (less preferable, but understandably the more likely answer) check if the current component I am evaluating is requiring another component, and building a dependency list.

2

Why not just create a simple ComponentManager that keeps track of all your created components and what happens to them?

3

Because they are not Components within my control. Either from other team members, or even some Unity made components use the require.

4

Sadly, I had to settle for the latter, but here is the code to check for required scripts

  void CheckRequired(Type myType) {
      Attribute[] attributes = Attribute.GetCustomAttributes(myType);
      foreach (Attribute attribute in attributes)
      {
          if (attribute is RequireComponent)
          {
              RequireComponent req = (RequireComponent)attribute;
              Debug.Log(req.m_Type0+" is required by "+myType);
              RegisterRequired(myType, req.m_Type0);
          }
      }
  }
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