Azure Pipeline: Update variables according to parameter - azure

Question

I have some very simple variables, which I would like to change according to the environment.
I have written the code below in very different ways (including indentation) but none was fruitful. Alternatives I see are
Use variable groups (trying to avoid to have too many of them)
Write a bash script which updates the variables (will work but I
think its not a super neat solution)
variables:
- group : secrets
- name: hello
value: world
${{ if eq(parameters.environment, 'dev') }}:
- name: RabbitMQ_replicaCount
value: 3
${{ if eq(parameters.environment, 'test') }}:
RabbitMQ_replicaCount: '1'
Any other ideas will be appriciated :)

Answer 1

I would rather go by a PS script/Bash script for this task. Why ? The logic part of build where manipulation is needed like setting or overriding var based on branch or env can be done in a better way in script rather than the build yaml itself. Also this part un-necessary elongates the yaml.
Step 1 : Define a var in the build pipe with default env name
and may be another var whose value you want to set based on condition
Step 2 : Add a yml file(lets name it BuildEnv.yml) in your repo which actually contains your PowerShell/Bash code:
steps:
- powershell: |
if($BuildEnv -ne "Test"){
Write-Host "##vso[task.setvariable variable=BuildEnv]Dev"
Write-Host "##vso[task.setvariable variable=RabbitMQ_replicaCount]11"
}
displayName: 'Override Build Env'
# MORE CODE HERE
Step 3: Plug your yml in the build pipe as a template-
trigger:
branches:
include:
- master
name: $(date:yyyy-MM-dd_HH.mm)_$(rev:.r)
stages:
- stage: Build_Stage
displayName: Build_Stage
jobs:
- job: Build_Job
pool:
name: ABC
steps:
- template: ..\BuildEnv.yml
#REST CODE
That's it. You are done.
Reference : Template usage in Azure DevOps build - https://learn.microsoft.com/en-us/azure/devops/pipelines/process/templates?view=azure-devops