Hi folks, new to Pulumi and getting our team account set up with some basic testing to see how things work. I have yet another question about

.apply

which I think I'm just getting syntax wrong. Code in my first reply, but the general gist of what I'm attempting: • Given two projects, we'll call them

bucket

and

iam

• Export an s3 bucket from the

bucket

project • Get the string value of that bucket's ARN in the

iam

project

You cannot get a string from an output if you haven't figured that out yet

@bored-oyster-3147 hmm, I guess https://www.pulumi.com/docs/intro/concepts/inputs-outputs/#outputs-and-strings is then really confusing me

That code does not create a string. It creates an output, that eventually will contain a string.

^ Sorry been busy working. Like he said. Outputs work like promises. All you are doing within an apply is transforming the eventual result. But the result is still eventual

However, in your use case, it doesn't matter. You don't need a string ARN to create a role that allows access to the bucket. You can use the ARN output (stack reference) directly. Pulumi knows that it is an output wrapping a string, and it will get the string correctly when it needs it.

“”_!”

@bored-oyster-3147@little-cartoon-10569 thank you both very much, that was all really helpful. If you happen to notice anything wrong in what I wrote below let me know so I can update it for others. For anyone finding this in the future I'll add some details below; this is relevant to Pulumi's Node TypeScript package. A resource that was really helpful was https://www.pulumi.com/docs/reference/pkg/nodejs/pulumi/pulumi/ particularly the section on StackReference. TypeScript - Exporting / Importing S3 Bucket, Using String Value e.g. ARN To set up a minimal example, let's say you have an s3 bucket in project1, and you need to reference its ARN in project2. Both projects have a stack named 'prod'. Note: when exporting from project1, you must export the bucket's ARN. As far as I can tell you cannot export the entire bucket and try to reference

bucket.arn

in project2, which is a bit unfortunate. So this works: project1

// export the bucket's ARN
export const bucketArn = bucket.arn;

project2

// import project1
const project1 = new pulumi.StackReference('myorganization/project1/prod');

// using the bucket ARN. after this, you can use the arn var as you'd expect
const arn = project1.requireOutputValue('bucketArn');

project2 - inside a string value

// if you need to use the bucket ARN to create an actual string, which is pretty common, you can do the following. this happens to be part of an aws.iam.PolicyDocument where we need to list the bucket resource with an /* appended to it:

{
	Action: [
	  's3:GetObject',
	],
	Effect: 'Allow',
	Resource: [pulumi.interpolate`${project1.outputs.bucketArn}/*`],
}