Unable to use variables from pipeline UI in main.yaml

[tblackshaw-kinly]

As stated in the title, I'm trying to use variables from the pipeline UI within our main.yaml file.

We're using the $(variable-name) notation as specified in the instructions, but when trying to use this throughout the yaml it uses the variable name ($(variable-name)) and not the variable value..

Essentially, we want to be able to use the pipeline UI variables to conditionally generate variables to use in the stage names, environment variables and bicep deployment.

trigger: none

pool:
  vmImage: windows-latest

variables:

# Fixed Variables (Do Not Modify)
  DeploymentPath: "$(Build.SourcesDirectory)/deployment"
  ScriptPath: "$(Build.SourcesDirectory)/scripts"
  ParameterPath: "$(Build.SourcesDirectory)/config"
  HubSubscriptionID: 'some-sub-id'

# Deployment Variables
  location: $(location) # westeurope, uksouth, [norwayeast, eastus]
  customer: $(customer)
  application: $(application)
  environment: $(environment)
  appSubnet: $(appSubnet)
  svcConnection: $(svcConnection)

# Dynamic Variables
  ${{ if eq( variables['location'], 'westeurope' ) }}:
    LocationSC: 'weu'
    NetworkPrefix: '10.200'
    HubRGName: 'some-hub-rg-name-weu'
    VHubName: 'some-vhub-name'
  ${{ if eq( variables['location'], 'uksouth' ) }}:
    LocationSC: 'uks'
    NetworkPrefix: '10.202'
    HubRGName: 'some-hub-rg-name-uks'
    VHubName: 'some-vhub-name'
  ${{ if eq( variables['location'], 'norwayeast' ) }}:
    LocationSC: 'nwe'
    NetworkPrefix: '10.204'
    HubRGName: 'some-hub-rg-name-nwe'
    VHubName: 'some-vhub-name'
  ${{ if eq( variables['location'], 'eastus' ) }}:
    LocationSC: 'eus'    
    NetworkPrefix: '10.206'
    HubRGName: 'some-hub-rg-name-eus'
    VHubName: 'some-vhub-name'

stages:
  - stage: "deploy_${{variables.application}}_${{variables.environment}}_networking"
    jobs:
      - job: BaseNetworking
        steps:
          - task: AzureCLI@2
            displayName: 'Deploy Base Networking'
            env:
              envApplication: ${{variables.application}}
              envEnvironment: ${{variables.environment}}
              envLocationSC: ${{variables.LocationSC}}
              envHubSubID: ${{variables.HubSubscriptionID}}
              envHubRGName: ${{variables.HubRGName}}
              envVHubName: ${{variables.VHubName}}
              envNetworkPrefix: ${{variables.NetworkPrefix}}
              envAppSubnet: ${{variables.appSubnet}}
              envCustomer: ${{variables.customer}}
            inputs:
              azureSubscription: ${{variables.svcConnection}}
              scriptType: 'ps'
              scriptLocation: 'inlineScript'
              inlineScript: 'az deployment sub create `
                --location ${{variables.location}} `
                --name kly-${{variables.application}}-${{variables.environment}}-networking `
                --template-file ${{variables.DeploymentPath}}/base-networking.bicep `
                --parameters ${{variables.ParameterPath}}/base-networking.bicepparam'

  - stage: "deploy_${{variables.application}}_${{variables.environment}}_management"
    jobs:
      - job: BaseManagement
        steps:
          - task: AzureCLI@2
            displayName: 'Deploy Base Management'            
            env:
              envApplication: ${{variables.application}}
              envEnvironment: ${{variables.environment}}
              envLocationSC: ${{variables.LocationSC}}
              envCustomer: ${{variables.customer}}
            inputs:
              azureSubscription: ${{variables.svcConnection}}
              scriptType: 'ps'
              scriptLocation: 'inlineScript'
              inlineScript: 'az deployment sub create `
                --location ${{variables.location}} `
                --name kly-${{variables.application}}-${{variables.environment}}-management `
                --template-file ${{variables.DeploymentPath}}/base-mgt.bicep `
                --parameters ${{variables.ParameterPath}}/base-mgt.bicepparam'