这是不可能通过管道资源定义来配置的

pipelines:
- pipeline: string # Required as first property. ID of the pipeline resource.
  project: string # Project for the source; defaults to current project.
  source: string # Name of the pipeline that produces the artifact.
  version: string # The pipeline run number to pick the artifact, defaults to latest pipeline successful across all stages; used only for manual or scheduled triggers.
  branch: string # Branch to pick the artifact. Optional; defaults to all branches, used only for manual or scheduled triggers.
  tags: [ string ] # List of tags required on the pipeline to pickup default artifacts. Optional; used only for manual or scheduled triggers.
  trigger:  # Specify none to disable, true to include all branches, or use the full syntax as described in the following examples.
    enabled: boolean # Whether the trigger is enabled; defaults to true.
    branches: branches # Branches to include or exclude for triggering a run.
    stages: [ string ] # List of stages that when matched will trigger the pipeline.
    tags: [ string ] # List of tags that when matched will trigger the pipeline.

字符串
并且在管道资源元数据中也不可用

resources.pipeline.<Alias>.projectName
resources.pipeline.<Alias>.projectID
resources.pipeline.<Alias>.pipelineName
resources.pipeline.<Alias>.pipelineID
resources.pipeline.<Alias>.runName
resources.pipeline.<Alias>.runID
resources.pipeline.<Alias>.runURI
resources.pipeline.<Alias>.sourceBranch
resources.pipeline.<Alias>.sourceCommit
resources.pipeline.<Alias>.sourceProvider
resources.pipeline.<Alias>.requestedFor
resources.pipeline.<Alias>.requestedForID

型
看来你的选择是：

• 运行ID resources.pipeline.<Alias>.runID
• 调用REST API

另一种方法可以是仅当原因是scheduled（Build.Reasonhere）时检查流水线A和trigger pipeline b via REST API中的原因。