Is there anyway during pulumi preview to get the generic typ

Question

Is there anyway during pulumi preview to get the generic type T of the pulumi Output object ie if something is defined as being a `pulumi Output str ` is there anyway to check the type at runtime of ` lt pulumi output Output object at 0x7d5389558400 gt `

polite-mechanic-60124 · Answer

The reason why I need this is because we use pulumi to pass variables to Nomad and unfortunately ` lt pulumi output Output object at 0x7d5389558400 gt ` is not a str and we get runtime type errors during pulumi preview

polite-mechanic-60124 · Answer

The potential workarounds are 1 skip pulumi preview and forget about the safety guarantees 2 Write a hcl2 parser and use reflection to mock out the actual types during pulumi preview 3 Split the pulumi projects and chain them This requires making changes into a 2 PR process

billowy-army-68599 · Answer

< polite mechanic 60124> you need to it inside an apply

billowy-army-68599 · Answer

polite-mechanic-60124 · Answer

Even in a pulumi preview

polite-mechanic-60124 · Answer

From <https www pulumi com docs intro concepts inputs outputs > ```During some program executions apply doesn t run For example it won t run during a preview when resource output values may be unknown Therefore you should avoid side effects within the callbacks For this reason you should not allocate new resources inside of your callbacks either as it could lead to pulumi preview being wrong ``` Unless something has changed apply doesn t run during pulumi preview so its not applicable

billowy-army-68599 · Answer

Sorry I was focusing more on your need to interpolate the type T not the preview par You can t get the raw type T outside an apply

polite-mechanic-60124 · Answer

Ok thank you I thought it was a long shot

billowy-army-68599 · Answer

It s definitely possible to do what you re trying to do though if you could explain why the ultimate goal is I can help with that