Get value of pipeline "name" into PowerShell command in Azure pipeline - azure-devops

Question

My azure-pipeline.yml sets a special magical variable called name that causes the pipeline name to be set.
I want to use this value inside a PowerShell script to put this value into a text file as a setting.
variables:
System.Debug: true
versionNumber: '0.0.0'
namePrefix: 'yml_$(versionNumber).'
buildConfiguration: 'Release'
tag: '-yml-$(versionNumber)'
publishBuildArtifactsSubfolder: 'yml\$(Build.Repository.Name)_yml_$(versionNumber).'
name: ${{ variables['namePrefix']}}$(Build.BuildId)
steps:
# Find and replace in files. PowerShell because bash isn't available.
- task: PowerShell#2
displayName: Set version number in environment.*.ts
inputs:
targetType: 'inline'
script: |
Write-Host "Build.DefinitionName is $(Build.DefinitionName)"
Write-Host "env-name is $($env:name)"
Write-Host "name is $($name)"
#Get-ChildItem 'environment.*.ts' -Recurse | ForEach {
# (Get-Content $_ | ForEach { $_ -replace '[[name]]', '${Build.DefinitionName}' }) | Set-Content $_
#}
Is it possible to get the value of name inside the PowerShell script? How? (Is this documented anywhere?)
Workaround
It appears to be impossible to get the special name thing, therefore set a variable with the same value.
variables:
System.Debug: true
versionNumber: '0.0.0'
namePrefix: 'yml_$(versionNumber).'
buildConfiguration: 'Release'
tag: '-yml-$(versionNumber)'
publishBuildArtifactsSubfolder: 'yml\$(Build.Repository.Name)_yml_$(versionNumber).'
name: ${{ variables['namePrefix']}}$(Build.BuildId)
steps:
- task: PowerShell#2
inputs:
targetType: 'inline'
script: |
Write-Host "name is $($name)"

Answer 1

Yes, the name it's a pre-defined variable Build.BuildNumber, so just use $(Build.BuildNumber).