I’m seeing some behavior I don’t understand with

local.Command

. Here is my entire Pulumi program:

package main

import (
	"<http://github.com/pulumi/pulumi-command/sdk/go/command/local|github.com/pulumi/pulumi-command/sdk/go/command/local>"
	"<http://github.com/pulumi/pulumi/sdk/v3/go/pulumi|github.com/pulumi/pulumi/sdk/v3/go/pulumi>"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {

		_, err := local.NewCommand(ctx, "test", &local.CommandArgs{
			Create: pulumi.String("./create.sh hello"),
			Delete: pulumi.String("./destroy.sh goodbye"),
			Environment: pulumi.StringMap{
				"foo":  pulumi.String("bar"),
			},
		})
		if err != nil {
			return err
		}

		return nil
	})
}

Here is `create.sh`:

#!/bin/bash

echo "hello: $1" >> /tmp/pulumi_log.txt

and `destroy.sh`:

#!/bin/bash

echo "goodbye: $1" >> /tmp/pulumi_log.txt

When I run

pulumi up

the first time, I get the

hello: …

in the log file. If I run

pulumi destroy

, I get the

goodbye: ...

in the log file. However, if I were to change the

environment

, nothing happens, the script does not seem to execute at all (nothing gets added to the log file. Is this expected? Am I doing something wrong?

What constitutes a replace in this case? It seems like just updates to inputs (e.g. environment or other dependencies) won’t have any impact, so it won’t get replaced?

As defined by default just changing the name etc. would trigger a replace I believe. You could trigger the replace by adding a

replaceOnChanges: ["environment"]

option on the resource

I see. Definitely not what I expected, probably worth a quick doc note in the README 🙂

That is my understanding. Perhaps we need an update hook as well? Feel free to open a feature request on the repo to start that conversation if you feel like you have a good use case.

FWIW, I opened an issue on my first thing, which I’ll update with the discussion here.