Azure release pipeline get build number of build pipeline

Question

I have a release pipeline for an asp.net 6 app which publishes the site to an IIS server. This release pipeline uses the artifacts published from the build pipeline. I link build pipeline to the release one

resources:
 pipelines:
     - pipeline: 'buildPipeline'
       project: 'My Asp Net App'
       source: 'Build pipeline'
       branch: 'main'

What Im trying to achieve is to get the version of the build pipeline into the release pipeline. I used the following powershell task to check the version

- task: PowerShell@2
  displayName: Version output
  inputs:
    targetType: "inline"
    script: |                     
     Write-Error "Build version is $(Build.BuildNumber)" 

and is outputting the version of the release pipeline instead of the build. How can I get it without using any external sources.

Answer 1

To get the Build version of the Pipeline resource, you can use the variable: resources.pipeline.<Alias>.runName.

The variable: resources.pipeline.<Alias>.runName will pass the variable: $(Build.BuildNumber) of build pipeline to release pipeline via pipeline resources.

For example:

- task: PowerShell@2
  displayName: Version output
  inputs:
    targetType: "inline"
    script: |                     
     Write-Error "Build version is $(resources.pipeline.buildPipeline.runName)" 

Refer to this doc: Pipeline resource variables