Trigger another build exist in project in Azure Devops

Question

I have a repo name called A with its build pipeline as azure-pipelines.yml Then I have another repo called B with its build pipeline as

Answer 1

I noticed the the flow for repo A is build => release (stages ops and dev). I wonder if the build is the build pipeline as azure-pipelines.yml, and release (stages ops and dev) is the classic release pipeline in azure devops Releases hub? You should know that pipeline resources triggers doesnot work for classic release pipeline.

build => release (stages ops and dev) for repo A should be in the same pipeline (ie. azure-pipelines.yml). So the pipeline resources trigger you defined in pipeline B only works when the pipeline A looks like below:

name: ..
trigger:
  - none
resources:
 containers:
    ..
variables:
  ..

stages:
- stage: build  # build the project in build stage
  jobs:
  - job 
    ..

- stage: ops    #stage ops
  jobs:
  - job:
    ...

- stage: dev    #stage dev
  jobs:
  - job:
    ...

The source in Pipeline B is the name of the pipeline A as julie-ng mentioned. See below example:

resources:
  pipelines:
  - pipeline: {Can be Any String} #identifier for the resource (used in pipeline resource variables)
    source: {Name of the pipeline A what you see in the UI}  #name of the pipeline that produces an artifact

Name of the pipeline A:

Resource trigger in Pipeline B:

resources:
 pipelines:
   - pipeline: AnyString
     source: pipelineA
     branch: DATA-1234

If the release pipeline for repo A is the classic release pipeline. You can add this external task Trigger Build in stage dev to trigger pipeline B in stage dev:

- task: benjhuser.tfs-extensions-build-tasks.trigger-build-task.TriggerBuild@3
  displayName: 'Trigger a new build of 48'
  inputs:
    buildDefinition: {ID of pipeline B}
    buildParameters: 'variableName: variableValue'  
    password: '$(System.AccessToken)'

If you want to pass some variables from Pipeline A to pipeline B. you can use the buildParameters field.

In pipelien B, Click the Variables button to define a Variable to the hold the variable value. (Note: Check this option Let users override this value when running this pipeline, so that it can be overrode from A pipeline )

You can always use the Rest api to trigger the pipeline. Please see below threads for more inforamtion

this thread

send multiple parameter to Azure-Devops pipeline job via Powershell

Can you pass a file to an azure pipeline?

Update:

You can use Builds - Queue rest api To trigger a pipeline.

POST https://dev.azure.com/{organization}/{project}/_apis/build/builds?api-version=6.1-preview.6

See below example:

curl -X POST --silent \
-H "Authorization:Bearer $(System.AccessToken)"  \  
-H "Content-Type:application/json" \ 
        $(System.TeamFoundationCollectionUri)$(System.TeamProject)/_apis/build/builds?api-version=6.1-preview.6 \

-d '{  
     "definition":{ "id": id-of-pipelineB}, 
     "sourceBranch":"refs/heads/DATA-1234"
    }'