Question

Your team uses an Azure Pipelines YAML pipeline stored in a repository hosted in Azure Repos Git. You want the pipeline to run automatically whenever a pull request targets the 'main' or 'release/*' branches, but the pipeline currently only runs on direct pushes. You add a 'pr' section to the YAML file specifying the branch filters, commit it, but the pipeline still does not trigger when developers open pull requests. What is the most likely cause?

Accepted Answer

PR triggers defined in YAML are not supported for Azure Repos Git; you must configure a build validation branch policy on the target branches instead.

Answer

The 'pr' section must be placed inside the 'trigger' section as a nested key for it to be recognized by Azure Pipelines.

Answer

PR triggers only work if the pipeline is stored in the same branch as the pull request source branch.

Answer

You must set 'pr: none' first and then re-enable it in the pipeline UI to activate PR validation.