How to prevent multiple runs of same pipeline due to multiple build completion check? - azure

Question

I am trying to run a pipeline based on build completion trigger. There are 4 build completion triggers enabled. Hence, the pipeline runs 4 times.
I have enabled "Batch changes while a build is in progress".
How do I make it run a single time once all build completion is complete?

Answer 1

Batch changes while a build is in progress only for CI builds. You can not apply it to build completion triggers. However, you can use PowerShell to run another pipeline: How to trigger a build from another build pipeline in azure devops
Just check active pipelines to skip many triggers. Here is example:
$user = ""
$token = $env:SYSTEM_ACCESSTOKEN
$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $user,$token)))
$orgUrl = "$env:SYSTEM_COLLECTIONURI"
$teamProject = "$env:SYSTEM_TEAMPROJECT"
$currentBuildDefId = "$env:SYSTEM_DEFINITIONID"
$buildBodyTemplate = "{`"definition`": {`"id`": <build_id>}}"
$restApiQueueBuild = "$orgUrl/$teamProject/_apis/build/builds?api-version=6.0"
$restApiGetBuilds = "$orgUrl/$teamProject/_apis/build/builds?definitions=$currentBuildDefId&statusFilter=inProgress,notStarted&api-version=6.0"
function InvokeGetRequest ($GetUrl)
{
return Invoke-RestMethod -Uri $GetUrl -Method Get -ContentType "application/json" -Headers #{Authorization=("Basic {0}" -f $base64AuthInfo)}
}
function InvokePostRequest ($PostUrl, $body)
{
return Invoke-RestMethod -Uri $PostUrl -Method Post -ContentType "application/json" -Headers #{Authorization=("Basic {0}" -f $base64AuthInfo)} -Body $body
}
function RunBuild($buildId)
{
$buildBody = $buildBodyTemplate.Replace("<build_id>", $buildId)
Write-Host $buildBody
$buildresponse = InvokePostRequest $restApiQueueBuild $buildBody
Write-Host $buildresponse
}
$resBuild = InvokeGetRequest $restApiGetBuilds
if ($resBuild.count -gt 1)
{
Write-Host $resBuild.count " builds in progress, skip the second build"
return
}
RunBuild SECOND_BUILD_DEF_ID