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# typescript

sparse-intern-71089

01/27/2021, 4:36 PM

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prehistoric-kite-30979

01/27/2021, 4:37 PM

I have diverged slightly from the example...

Copy code

export function registerAutoTags(tags?: Record<string, string>): void {
    const metadata = new pulumi.Config("tetrate:metadata")
    pulumi.runtime.registerStackTransformation((args) => {
        if (isTaggable(args.type)) {
            args.props["tags"] = { ...args.props["tags"], ...tags, ...{
                "pulumi:project": pulumi.getProject(),
                "pulumi:stack": pulumi.getStack(),
                "tetrate:owner": metadata.require("owner"),
                "tetrate:source": metadata.require("source"),
            } }
            return { props: args.props, opts: args.opts }
        }
        return undefined
    })
}

prehistoric-kite-30979

01/27/2021, 4:37 PM

(this function is called immediately after the imports)

prehistoric-kite-30979

01/27/2021, 4:37 PM

Is there something else I should be doing?

brave-planet-10645

01/27/2021, 4:45 PM

Firstly, good for you trying to get your head around transformations. If we had exams, this would be on the advanced exams

brave-planet-10645

01/27/2021, 4:46 PM

I've not done stack transformations, but I've done resource transformations so let me hunt out some code and see if I can help

brave-planet-10645

01/27/2021, 4:57 PM

So I think it's because you've got the

metadata.require

in there. I would pass in the metadata to the parameters of the

registerAutoTags

method

prehistoric-kite-30979

01/27/2021, 7:06 PM

gave that a go but no luck

prehistoric-kite-30979

01/27/2021, 7:07 PM

I also tried the following and I get the same error

Copy code

export function registerAutoTags(tags?: Record<string, string>): void {
    pulumi.runtime.registerStackTransformation((args) => {
        if (isTaggable(args.type)) {
            args.props["tags"] = { ...args.props["tags"], ...tags, ...{
                "test": "test",
            } }
            return { props: args.props, opts: args.opts }
        }
        return undefined
    })
}

prehistoric-kite-30979

01/27/2021, 7:15 PM

Copy code

export function registerAutoTags(tags?: Record<string, string>): void {
    pulumi.runtime.registerStackTransformation((args) => {
        return undefined
    })
}

same error here ^^

little-cartoon-10569

01/27/2021, 7:56 PM

Are you exporting the function from index.ts or another module? I don't know if you can export it from index.ts...

prehistoric-kite-30979

01/27/2021, 9:32 PM

I am, will try something else

prehistoric-kite-30979

01/27/2021, 9:32 PM

changed to non-index.ts but no luck

little-cartoon-10569

01/27/2021, 9:41 PM

Just don't export it.

little-cartoon-10569

01/27/2021, 9:41 PM

You only need to export it if it's in one module and used in a different one.

little-cartoon-10569

01/27/2021, 9:42 PM

If the code is in index.ts, and used there, then just define the function locally.

prehistoric-kite-30979

01/27/2021, 9:50 PM

ah, I see what you mean

prehistoric-kite-30979

01/27/2021, 9:50 PM

yes that appears to work

👍 1

prehistoric-kite-30979

01/27/2021, 9:52 PM

thanks for the help!

👍 1

prehistoric-kite-30979

01/27/2021, 10:07 PM

hm actually it appears to never get called

prehistoric-kite-30979

01/27/2021, 10:08 PM

Copy code

pulumi.runtime.registerStackTransformation((args) => {
    console.log("TEST")
        args.props["tags"] = { ...args.props["tags"], ...{
            "pulumi:project": pulumi.getProject(),
            "pulumi:stack": pulumi.getStack(),
        } }
        return { props: args.props, opts: args.opts }
})

little-cartoon-10569

01/27/2021, 10:08 PM

Are you creating resources?

prehistoric-kite-30979

01/27/2021, 10:09 PM

yes

prehistoric-kite-30979

01/27/2021, 10:09 PM

vpc via awsx

little-cartoon-10569

01/27/2021, 10:10 PM

Console logs appear within the Pulumi output as a message, they don't go to the usual console.

prehistoric-kite-30979

01/27/2021, 10:10 PM

yeah I dont see the logs or the tags though

little-cartoon-10569

01/27/2021, 10:13 PM

Hmm... not sure.. I don't suppose there'd be a problem due to tagging untaggable resources. It's TypeScript, the spurious properties would just be ignored...

little-cartoon-10569

01/27/2021, 10:15 PM

My equivalent function is this:

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function autoTagger(autoTags: any): ResourceTransformation {
  return function (args: ResourceTransformationArgs) {
    if (isTaggable(args.type) && (args.opts as any)["import"] == undefined) {
      args.props.tags = {
        Name: `${args.name}`, ...autoTags, ...args.props.tags,
      };
      return { props: args.props, opts: args.opts };
    }
    return undefined;
  }
}

prehistoric-kite-30979

01/27/2021, 10:16 PM

will copy and report back

little-cartoon-10569

01/27/2021, 10:17 PM

That function gets passed to pulumi.runtime.registerStackTransformation(). It sets a default Name tag, then the tags passed into it, then the tags explicitly set on the resource being transformed. So it's not quite the same as yours. But the syntax is slightly different, so maybe you'll see something that helps.

little-cartoon-10569

01/27/2021, 10:18 PM

The "import" bit is to skip transformation on any resource that has the "import" opt. That won't apply to you.

prehistoric-kite-30979

01/28/2021, 1:39 PM

Couldn't get it to work so have raised an issue here https://github.com/pulumi/pulumi/issues/6214

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