Set Pull Request polices based on raising user(s) - azure-devops

Question

I want to assign required approvers based on who raises a PR and not what the PR is on.
I have a set of repos that is maintained by multiple teams. I want to have a team be automatically added as required reviewers based on the user making the PR.
Is this even possible?

Answer 1

Is this even possible?
It's possible. But the process would be very complex since Azure Devops doesn't have such out-of-box feature, so we have to use Build Validation/Rest API/PS to achieve what you want.
1.Create a Classic Build pipeline with PS task.
2.Add build validation in branch policy. So this pipeline will run first if anyone raises a PR.
3.If one pipeline is triggered by PR, we can access the variables like $(Build.Repository.ID),$(Build.RequestedFor)(the user making the PR),$(Build.RequestedForEmail)(the user's email). See predefined variables.
4.Use Teams-Get to get list of teams in current project. You now have the TeamIDs, you now know the corresponding TeamIDs the user belongs to.
5.Use powershell switch or if statement to dynamically define the team the user belongs to.
switch ("$(Build.RequestedFor)")
{
"User1" {$TeamID="xxxx"; Break}
"User2" {$TeamID="xxxx"; Break}
"User3" {$TeamID="xxxx"; Break}
Default {
"No matches"
}
}
6.Use Configurations-List to list the ConfigurationIDs in this project. (You may also need to determine the correct ConfigurationID by SourceRepo and SourceBranch)
7.Then use Configuration-Update to update the branch policy to define required approvers dynamically.
The request body would look like this:
{
"isEnabled": true,
"isBlocking": true,
"type": {
"id": "fd2167ab-b0be-447a-8ec8-39368250530e"
},
"settings": {
"requiredReviewerIds": [
"{replace it with corresponding TeamID}"
],
"filenamePatterns": [],
"addedFilesOnly": false,
"scope": [
{
"repositoryId": "{replace it with your repoID in step3}",
"refName": "refs/heads/master",
"matchKind": "exact"
}
]
}
}
You can do step5 and step7 in same PS task.