Rest API call to TFS to get the changeset details from the build

Getting the changeset details from VSTS

Enable the setting "Allow script to access OAuth token" in the VSTS team system and run the following powershell commands

$buildId = $env:BUILD_BUILDID

$headers = @{Authorization=("Bearer {0}" -f $env:SYSTEM_ACCESSTOKEN)}

$buildInfoUri = "$($env:SYSTEM_TEAMFOUNDATIONCOLLECTIONURI)$env:SYSTEM_TEAMPROJECTID/_apis/build/builds/$($buildId)?api-version=2.0"

$buildInfo = Invoke-RestMethod -Method Get -Uri $buildInfoUri -Headers $headers 

$sourceVersion = $buildInfo.sourceVersion

$changesetUrl = "$($env:SYSTEM_TEAMFOUNDATIONCOLLECTIONURI)/_apis/tfvc/changesets/$($sourceVersion)/changes?api-version=2.0"

$changeset = Invoke-RestMethod -Method Get -Uri $changesetUrl -Headers $headers