When creating a provider, and

DryRun

is

true

, in this guide, https://www.pulumi.com/docs/iac/extending-pulumi/build-a-provider/ in the example code, it returns empty state in the

Update

function, and only

ID

defined in the

Create

function. But theres no more explanation around what to return when

DryRun

is

true

, only that you have to return early. Is there some more explanation somewhere on this?

DryRun means that it's currently running

pulumi preview

so you shouldn't do any actual resource operations. The example as given works, but its not optimal because it means all outputs will be unknown at preview time, even those that aren't being changed. Unfortunately I don't know if it's possible to support partial unknowns in the go provider SDK. Hopefully someone else can chime in on that.

I could also define the content in the return, as its given in the argument ? or only in create arguments, maybe not update arguments?

both I think, generally in Update you know the old outputs and so can just mark the ones that might change from the new input as unknown. But that's all using the raw grpc protocol, I don't know how the Go provider framework deals with those partial known/unknown cases.

That diff looks ok to me, as long as your early returning when DryRun is set