Define Azure Pipeline For Multi-Repos

I have a project in Azure that has many repositories. All of the repositories need to run with the same pipeline, so I'm looking for a way to define the repository name as a variable.

Here's an example of what I'm trying to achieve:

trigger:
- master

pool:
  name: 'xxxx'

variables:
  repoName: 'repoA'

resources:
  repositories:
    - repository: repo
      type: git
      name: '50aa1c1f-21f0-4c61-8d85-d83218e705c9/$(repoName)'

steps:
- checkout: self
- checkout: repo

- script: echo Hello, world!
  displayName: 'Run a one-line script'

Does anyone have any idea how to get this to work?

I have a project in Azure that has many repositories. All of the repositories need to run with the same pipeline, so I'm looking for a way to define the repository name as a variable.

It's not supported to use variable as the repository name in Yaml resource. Please check the doc below:

If you would like to checkout multiple repo, and define reponame in variable, as an alternative, you can use checkout task.

- checkout: git://projectname/${{ variables.repoName}}@${{ variables.branchRef }}

It's mentioned in doc:

Please check similar ticket for the details.

Edit:

In my case there are dozens of repos, we won't be able to define and mange a pipeline for each repository.

You can use parameter to define the reponame and use each loop for checkout task.

parameters:
  - name: repoNames
    type: object
    default:
      - repo1
      - repo2
      - repo3

steps:
- checkout: self

- ${{ each repo in parameters.repoNames }}:
  - checkout: git://myproject/${{repo}}

It checks out all repos:

If you have different project name used with different repo name, you can use nested in parameters, my sample here.