How can i include folders from other repos when running a pipeline in Azure Devops

Question

I have a repo called REPO A and have created a YAML pipeline in here but I also have some code in REPO B which I need to use in this pipeline

In YAML how can tell the pipeline in REPO A to use files/folders from REPO B?

Im a newbie to this so can you please keep it simple?

    resources:
  repositories:
    - repository: automation
      type: git
      name: MYORG/ automation
      ref: develop
      endpoint: YourEndpoint

  steps:
    - checkout: self
      path: "s/Source" :  ***>>>>>> what should this be??***
    - checkout: automation

Answer 1

You should check out multiple repositories on your YAML pipeline. You can define a new resource repository and checkout this repository along with your source (the one that triggers the pipeline).

resources:
  repositories:
    - repository: devops_sf
      type: github
      name: Organization/Repository
      ref: master
      endpoint: YourEndpoint

  steps:
    - checkout: self
      path: "s/Source"
    - checkout: devops_sf

Then you will be able to access your repositories under

$(Pipeline.Workspace)/s/Repository
$(Pipeline.Workspace)/s/Source

Multi repo checkout for Azure DevOps:

https://docs.microsoft.com/en-us/azure/devops/pipelines/repos/multi-repo-checkout?view=azure-devops

Answer 2

ok simply put at the top of the yaml i added

> resources:

    >       repositories:
    >       - repository: automation
    >         type: git
    >         name: name of yourpoject/name of repo you want to use 
    >         ref: whatever branch of that repo(under repository above) you want to use

THEN!! under steps in the YAML (if you havent one you need to add it!)

>    steps:
>         - checkout: self 
>         - checkout: your repository you want to use as above

Also if you use npm to run a task you need to add the below as well to not get any file not found errors! a common error if you dont add the below code is : npm WARN saveError ENOENT: no such file or directory, open '/home/vsts/work/package.json

The below code is put in the -Task section

>     >    npm install
>     >       displayName: 'a task using npm'
>     >       workingDirectory: '$(Build.SourcesDirectory)/your repository you  want to use as above

ALSO be aware of indentation when inserting code in YAML it's annoying and a pain if you havent got the indentation right it gives you errors just tab until they go away