How do I set environment variables for artillery scenarios.flowFunction?

Question

I am trying to set artillery scenarios.flowFunction via an environment variable.

Here is my artillery execution cli statement:

"artillery": "export ARRIVAL_RATE=$arrivalRate && export DURATION=$duration && export MAX_USERS=$maxUsers && export LOB=$lob && export FUNCTION=$function && artillery run ./artillery/$lob.yml"

And here is my artillery.yml:

config:
 target: https://url
 phases:
 - duration: "{{$processEnvironment.DURATION}}"
 arrivalRate: "{{$processEnvironment.ARRIVAL_RATE}}"
 maxVusers: "{{$processEnvironment.MAX_USERS}}"
 engines:
 playwright:
 launchOptions:
 headless: true
 contextOptions:
 storageState: './storage.json'
 processor: '../playwright/{{$processEnvironment.LOB}}.ts'
 variables:
 function: "{{$processEnvironment.FUNCTION}}"
before:
 engine: playwright
 flowFunction: loginUserAndSaveStorage
scenarios:
 - engine: playwright
 flowFunction: "{{ function }}"

I keep getting undefined for my flowFunction, but not my other env vars. I have tried explicitly setting FUNCTION on my cli cmd, but still undefined.

I have also tried without the config.variable configuration, and referencing {{$processEnvironment.FUNCTION}} directly in flowFunctions, but same result, undefined.

• Bouke: Note that using $processEnvironment is deprecated, better to use $env instead, as mentioned in artillery.io/docs/reference/test-script.
• Bouke: Also happens when using a variable for the engine property or when using testFunction instead of flowFunction (alias). Seems like variables are not supported for all property values.