How to get Git Tag in Azure Pipelines

Question

In Azure Pipelines, I have enabled git tags to trigger pipelines like so:

trigger:
  branches:
    include:
    - \'*\'
  tags:
    include:
    - \'*\'
<         


        

Answer 1

git describe can provide you with the (closest) tag name for a given git hash and Azure can give you the current hash with $(Build.SourceVersion).

Use the --exact-match to limit git describe to only use a tag from the specific commit:

git describe --exact-match $(Build.SourceVersion)

If there is a tag, it'll be returned on stdout:

$ git describe --exact-match d9df242
v1.0.0

If there is no tag, git describe --exact-match exits with exit code 128:

$ git describe --exact-match cc1f9d2
fatal: no tag exactly matches 'cc1f9d23854c37dec000485c6c4009634516a148'
$ echo $?
128

so you can use this in a test or simply fail the task in pipelines that trigger on more than just tagged revisions.