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#general
Title
# general
m

melodic-kilobyte-42348

02/11/2024, 3:25 AM
How can my python callback function know if it's pulumi up or it's pulumi destroy? I found there is
is_dry_run
. I want to my callback
xxx..id.apply(callback)
to handle the up and destroy differently but can't figure it out
c

cuddly-computer-18851

02/11/2024, 3:52 AM
As a workaround you could pass in an environment variable with the operation.
m

melodic-kilobyte-42348

02/11/2024, 2:59 PM
thanks but dont think that's a good idea... I dig into the SDK can see I can get project stack but can't know if that's the destroy or up
e

echoing-dinner-19531

02/12/2024, 8:38 AM
your program doesn't currently run at all during destroy. We're looking at adding this feature this year so that you can run real functions on create/update/destroy.
For now the recommendation is generally to make use of the command provider to hook up a dependent command resource that gets destroyed at the same time and run a command via that
m

melodic-kilobyte-42348

02/12/2024, 1:27 PM
@echoing-dinner-19531 do you mind you be more specific on command provider to hook up a dependent command resource? as far as I know pulumi doesn't support the dependence like terraform. that's why I use
xxx..id.apply(callback)
e

echoing-dinner-19531

02/12/2024, 1:41 PM
Command provider: https://www.pulumi.com/registry/packages/command/api-docs/ And you can make any resource depend on another one with the depends on property: https://www.pulumi.com/docs/concepts/options/dependson/ Then just delete the main resource and the command resource in the same deployment and you'll get the commands destroy function run at the right time. And as I said, we are looking at making this more first class and well supported.
m

melodic-kilobyte-42348

02/12/2024, 3:57 PM
thanks. it doesn't help in my case based on my understanding. I need to run commands when the resource is created( lets say
hello world create the resource
) but a little different commands when resource is destroyed(
hello world destroy the resource
) I will need to know if this is pulumi up or destroy no matter I use
xxx..id.apply(callback)
or
depends_on
e

echoing-dinner-19531

02/12/2024, 4:02 PM
Command resource can run different commands on Create vs Delete. So if you make that resource side-by-side with your other resource then you can get create and delete triggers at the right time. Wrap it all up in a component resource or function and its even pretty re-usable.
m

melodic-kilobyte-42348

02/12/2024, 4:05 PM
thanks and finally got it... I hope you can add this feature soon. so I don't have write command wrapper to call another python script or bash command on create/delete