Azure DevOps Pipeline - Add latest git tag to Build.BuildNumber

Is it possible to include the latest git tag in the Build.BuildNumber variable? You can read the latest git tag with git describe --abbrev=0 and assign it to a new variable. But can I use it in the build numbe's definiton then?

Solution

Your command to get latest tag failed for me. I believe it is because in cases when you do not have a tag assigned on the latest commit you get an error.

You can use instead to get the latest tag.

$tags =  git tag | sort -V

Given that you have the latest tag, you can then update build number with the following power shell.

- task: PowerShell@2
  displayName: update build number
  inputs:
    targetType: 'inline'
    script: |
      $tags =  git tag | sort -V
      Write-Host latest tag is:$tags[0]
      Write-Host "Updating buildnumber..."
      $buildnumber = -join($tags[0],"_","$(Build.BuildNumber)")
      Write-Host "##vso[build.updatebuildnumber]$buildnumber"

Result: