So far I was using the below pipeline which triggers the main pipeline. It tracks the pushed tags by developer to the master branch, and if so, starts running.

first_pipeline.yml

trigger:
  tags:
    include:
      - '*'
  paths:
    include:
      - master

variables:
  agent_pool: 'DEVAGENT'

pool:
  name: $(dev_pool)

The above pipeline triggers that one:

main_pipeline.yml

trigger: none
pr: none

resources:
  repositories:
    - repository: Grand
      type: git
      name: Automotive/Grand
      ref: master
      endpoint: Grand
    - repository: CICD
      type: git
      name: pipelines
      ref: master
  pipelines:
    - pipeline: Grand
      source: 'Grand'
      project: Automotive
      trigger: true

variables:
  - template: variables.yml

stages:
    - stage: DEV
      displayName: 'Development'
      variables:
        - name: environment
          value: ${{ variables.env_dev}}
      pool:
        name: ${{ variables.agent_dev }}
      jobs:
        - deployment: DEV
          displayName: 'Deploying to DEV'
      # Rest of the code   
  - stage: PRD
    displayName: 'Production Stage'
    variables:
      - name: environment
        value: ${{ variables.prd }}
    pool:
      name: ${{ variables.agent_prd }}
    jobs:
      - deployment: PRDDeploy
        displayName: 'Deploying to PRD'
    # Rest of the code

Above pipeline deploys changes to DEV stage, and than to PRD stage.

Now I’m trying to modify the pipeline to work in such a way that, for example:

• when a change comes from the dev or deploy branch, then only the DEV stage will be run
• when a change comes from feature or hotfix branches, it will go directly to PRD
• when it comes from master as it has been until now, then it will go
  to both DEV and PRD.

So far it works only with the last condition, my first attempt leads to errors, because I am not sure how to pass those branch names from the first to main pipelines and modify that second one.