[BUG]: Debug output has TrigerringPipeline [sic] set to true but trigerringBuild set to 0 when triggered by upstream pipeline

[vanastassiou]

What happened?

When a pipeline is triggered by another pipeline's stage completion, the debug output is as follows when downloading the pipeline artifact:

##[debug]BuildResult: Succeeded
##[debug]Run: Specific
##[debug]ProjectId: 0f57f56b-9789-486b-a9a4-a35cf09ff7fa
##[debug]TrigerringPipeline: true
##[debug]Environment: Build
##[debug]PipelineId from trigerringBuild: 0
##[debug]PipelineVersionToDownload: latest
##[debug]PipelineId from non-trigerringBuild: 209139

Versions

==============================================================================
Task         : Download Pipeline Artifacts
Description  : Download build and pipeline artifacts
Version      : 2.198.0
Author       : Microsoft Corporation
Help         : https://docs.microsoft.com/azure/devops/pipelines/tasks/utility/download-pipeline-artifact
==============================================================================

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

No response

Operation system

No response

Version controll system

No response

Relevant log output

No response

[vanastassiou]

Some attributes of the triggered (downstream) pipeline that will be handy for implementing a fix:

# az pipelines runs show --id $triggering_pipeline_execution_id --output json
{
  "triggerInfo": {
    "alias": "Triggering_Pipeline",
    "artifactType": "Pipeline",
    "pipelineId": "[ID number of upstream triggering pipeline execution]",
    "pipelineTriggerType": "PipelineCompletion",
    "projectId": "[REDACTED]",
    "source": "[Friendly name of upstream triggering pipeline definition as seen in ADO Pipelines GUI]",
    "version": "[$date.number of upstream triggering pipeline execution as seen in ADO Pipelines GUI]"
  },
  "triggeredByBuild": null,
}

[vanastassiou]

The logic to look at is in src/Agent.Plugins/PipelineArtifact/PipelineArtifactPluginV2.cs