Azure pipeline yml - Change value in task and execute based on if else condition - azure

Question

In the below task, based on the branch, how do I specify a different value for assembleQaDebug. If the branch is qa it has to be assembleQaDebug; if develop, it has to be assembleDevelopDebug . And if prod branch, it has to be assembleProdRelease. What is the best approach doing this, if there is one. Any help is much appreciated.
- task: Gradle#3
displayName: 'Build Task'
continueOnError: false
inputs:
tasks: assembleQaDebug -PversionCode=$(Build.BuildId) -PdisablePreDex --no-daemon
publishJUnitResults: false

Answer 1

Not sure if it's the best way to do this, but I love using variables for those kind of use cases, so check this one :
...
variables:
- name: assembleDebug
${{ if eq(variables['Build.SourceBranch'], 'refs/heads/prod') }}:
value: assembleProdRelease
${{ elseif eq(variables['Build.SourceBranch'], 'refs/heads/qa') }}:
value: assembleQaDebug
${{ elseif eq(variables['Build.SourceBranch'], 'refs/heads/develop') }}:
value: assembleDevelopDebug
...
- task: Gradle#3
displayName: 'Build Task'
continueOnError: false
inputs:
tasks: $(assembleDebug) -PversionCode=$(Build.BuildId) -PdisablePreDex --no-daemon
publishJUnitResults: false

Answer 2

The values has to be specified in 'variables' section:
variables:
- name: tf_version
value: latest
- name: variablegroupname
${{ if eq(variables['Build.SourceBranchName'], 'develop') }}:
value: assembleDevelopDebug
${{ if eq(variables['Build.SourceBranchName'], 'qa') }}:
value: assembleQaDebug
- name: env
${{ if eq(variables['Build.SourceBranchName'], 'main') }}:
value: prod
${{ if eq(variables['Build.SourceBranchName'], 'dev') }}:
value: develop
Like this you can add your variables and depending on your stage you can replace the values.