Pipeline Yaml: BuildNumber is updated but the build description doesn't seem to interpret the variables

Question

I'm trying to change a build description text according to some parameters. The BuildNumber follows but the build description (the big name of the build) doesn't seem to interpret the variables.

Here's an extract of the yaml

variables:
- group: NumVersion
- name: upperversion
  ${{ if eq(parameters.VersionBuild,'ReleaseProd') }}:
    value: $(1-VersionMajeur).$(2-VersionMineure-ReleaseProd)
  ${{ if eq(parameters.VersionBuild,'Release') }}:
    value: $(1-VersionMajeur).$(2-VersionMineure-Release)
  ${{ if eq(parameters.VersionBuild,'Develop') }}:
    value: $(1-VersionMajeur).$(2-VersionMineure-Dev)

- name: lowerversion
  ${{ if eq(parameters.TypeBuild,'Feature') }}:
    value: 99.$(Build.BuildId)
  ${{ if eq(parameters.TypeBuild,'Validation') }}:
    value: 0.$(Build.BuildId)

name: $(upperversion).$(lowerversion)

steps:
  - script: |
       echo $(Build.BuildNumber)
       echo $(upperversion)
       echo $(lowerversion)
    displayName: Second variable pass

The output of the bash script

The name of the build

Did I forget something to set or should I use another way of calling the variables?

Thanks for your help!

Answer 1

The Buildnumber is set when the job is initialized, not in the order in which it's specified in the YAML file.

To fix your issue you must run one step to set the buildnumber as part of your workflow. You can do this in a separate job, or as part of the very first joḃ.

- script: |
       echo ##vso[build.updatebuildnumber]$(upperversion).$(lowerversion)

Or use my Azure Pipelines Variables tasks:

- task: VariableSetTask@2
  inputs:
    variableName: 'build.buildnumber'
    value: '$(upperversion).$(lowerversion)'