I have multiple pipelines that all needs a specific pipeline as a resource, let’s consider the below as one of the pipeline that uses pipeline resource.

trigger: none

resources:
  pipelines:
    - pipeline: test
      project: Project
      source: test
      version: 1.2.3

stages:
  - stage: Validation
    jobs:
      - job: Validation
        steps:
          - script: echo "Validating"

When version of the resource pipeline(test) changes for example to 1.3.0, I need to update all the pipeline that uses this resource. So I was looking to create a resource template that can be used by all the pipelines and only the resource template needs to be updated for version change.

I came across this example Extend from a template with resources – I implemented it, but when I combine extends with stages I get this error:

Encountered error(s) while parsing pipeline YAML:
/Pipelines/test.yml (Line: 6, Col: 1): Unexpected value ‘stages’

My implementation looks like this,

#resource-template.yml
resources:
  pipelines:
    - pipeline: test
      project: Project
      source: test
      version: 1.3.0

#test.yml
trigger: none

extends:
  template: Templates/_Shared/resource-template.yml

stages:
  - stage: Validation
    jobs:
      - job: Validation
        steps:
          - script: echo "Validating"

If I remove stages my implementation works good, but I need to use the stages in the main pipeline. Is there any different approach to handle this case?