Hi folks new to Pulumi and getting our team account set up w

Question

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

acoustic-plumber-13001 · Answer

bucket project ```export const bucket = new aws s3 Bucket ``` This works as expected in the Pulumi cloud console I can see the exported value ``` arn arn aws s3 my awesome bucket ``` iam project ``` this works correctly const bucketProject = new pulumi StackReference mycompany bucketproject testing now need to get the bucket arn as a string i ve tried about a dozen variations of this all either resulting in undefined or Output lt T gt const arnAsString = bucketProject outputs apply bucket = gt bucket arn ``` Thanks for any help

acoustic-plumber-13001 · Answer

Ah after searching more I found <https pulumi community slack com archives CJ909TL6P p1652759592057809> which I think explains the problem for anyone else searching through here in future Going to work on trying it

bored-oyster-3147 · Answer

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

acoustic-plumber-13001 · Answer

< bored oyster 3147> hmm I guess is then really confusing me

acoustic-plumber-13001 · Answer

``` Would like to produce a string equivalent to http $ hostname $ port let url = pulumi all hostname port apply hostname port = gt `http $ hostname $ port ` ``` Creates a string What I m missing I think is that example isn t using an output from another stack

little-cartoon-10569 · Answer

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

bored-oyster-3147 · Answer

^ 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

little-cartoon-10569 · Answer

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

little-cartoon-10569 · Answer

So long as you don t try to put the output into a string variable you ll be fine So don t try this ```const arn string = stack require bucketARN ``` Just do this and it will work ```const arn = stack require bucketARN ```

little-cartoon-10569 · Answer

You can use that variable as a property of an args object that you re passing to a Pulumi resource constructor Pulumi will handle the rest

acoustic-plumber-13001 · Answer

< 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 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 ` ```

acoustic-plumber-13001 · Answer

My only question now is how to handle things in a simple scenario where we have a `dev` and `prod` stack in each project but I ll save that for another day slightly smiling face