parameters:
  updateBuild: false

steps:
  - pwsh: |
      $featurePrefix = "refs/heads/$env:FEATURE_NAME_PREFIX"
      if ($env:BUILD_SOURCEBRANCH.StartsWith($featurePrefix)) {
        $feature = $env:BUILD_SOURCEBRANCH.Substring($featurePrefix.Length)
        Write-Host "Feature name: $feature"
        Write-Host "##vso[task.setvariable variable=FEATURE_NAME]$feature"
      } else {
        Write-Host "No feature name."
      }
    displayName: Determine the feature name, if any
  - pwsh: |
      $pr = "pr." + $env:SYSTEM_PULLREQUEST_PULLREQUESTNUMBER
      Write-Host "Preview label: $pr"
      Write-Host "##vso[task.setvariable variable=PREVIEW_LABEL]$pr"
    displayName: Use a special preview label for PRs
    condition: eq(variables['Build.Reason'], 'PullRequest')
  - pwsh: |
      $label = ""
      if ($env:BUILD_REASON -ne "PullRequest") {
        $label = "+" + $env:BUILD_SOURCEBRANCHNAME
      }
      $label = "$env:SKIASHARP_VERSION-$env:PREVIEW_LABEL.$env:BUILD_NUMBER$label"
      Write-Host "Build label: $label"
      Write-Host "##vso[build.updatebuildnumber]$label"
    displayName: Update the build number with a more readable one
    condition: ${{ parameters.updateBuild }}