I want to apply a transformation to all children of a specific CustomComponent resource, to import existing resources into the stack on the first run. But I couldn't find a way how to do that transparently: The stack transformation

ctx.RegisterStackTransformation(...

applies to all resources in order, without taking into account child/parent relationship. And it doesn't seem to be a way to check if "is it a parent of XX?". I tried to add a transformation to the CustomComponent resource in the stack transformation but it didn't work (the nested one never runs). In other words, I wanted to add another transformation in the stack transformation. Seems to be a limitation? I'm using Go, if that matters. Does anyone have an idea how to achieve this? I could add that resource-specific transformation when instantiating the CustomResource, but that would require doing that everywhere including tests.

In my mind, that's not really something that happens inside the normal flow of a Pulumi program. That's sufficiently exceptional that a separate flow is justified. I'd consider writing a wrapper script for

pulumi stack init

which also calls

pulumi import

a pile of times (and discards the generated code).