Environment: Azure DevOps Server 2022.0 with Windows-agents

We have several big Windows projects in different Git-repos. They should be built by a single YAML-pipeline, using project-specific templates. I created a YAML repo for anything pipeline.

I would like the triggering repo to set a variable that I can use further down the line as part of a template name, and in the build id. Not only that, I would like to be able to specify, for a manual run, which project to use, and use that information in the same way.

Azure-pipelines.yml:

resources:
  repositories:
    - repository: AAA
      type: git
      name: AAA
      ref: main
      trigger:
        branches:
          include:
            - main

    - repository: BBB
      type: git
      name: BBB
      ref: main
      trigger:
        branches:
          include:
            - main

    - repository: YAML
      type: git
      name: YAML-Automation
      ref: main
      trigger:
        - none

parameters:
- name: projectToBuild
  displayName: "Project to build:"
  type: string
  default: AAA
  values:
  - AAA
  - BBB
  - CCC

variables:
  productName: $(Build.Repository.Name)
  productVersion: 5.0.1

name: $(Build.Repository.Name)_$(productVersion)_$(Date:yyMMdd)$(Rev:rr)

I guess because a trigger from a repo happens after the YAML code has been compiled, the information is not available when “name” is set. But when I output the variable, it shows the correct information:

When repo BBB triggers,

echo Build.Repository.Name =  $(Build.Repository.Name) 

shows BBB, but the build has the name
#YAML-Automation_5.0.1_24070505

The checkout should be only for the YAML-repo and for the triggering one, so I need the name of the triggering repo again, which is empty.

Further down the line, I would like to use, for example, a template jobStuff-$(productname).yml, but productName is empty, and it doesn’t work.

Finally, for a manual run, I would like to use the value of the manual project selection, projectToBuild, as input for productName, guess that would just require an “if manual”, as in $[eq(variables[‘Build.Reason’], ‘Manual’)].

Should my general approach work?
What could I do to get the name of the triggering into a usable variable?