Pass array as inputs to Azure DevOps YAML task

Question

I'm trying to configure a CI that will produce NuGet packages as artifacts on Azure DevOps (that will be later pushed to my NuGet server).

For this, I'm using Builds Pipelines on Azure DevOps, the YAML version.

I have 3 projects that should build packages. I'm using NuGetCommand@2 to accomplish this task :

- task: NuGetCommand@2
  inputs:
    command: pack
    packagesToPack: $(Build.SourcesDirectory)/src/HTS_MessageEngine.Communication/HTS_MessageEngine.Communication.csproj
    majorVersion: $(majorVersion)
    minorVersion: $(minorVersion)
    patchVersion: $(patchVersion)
    versioningScheme: byPrereleaseNumber

However, I have to duplicate this block 3 times, for each project. Is there a way to specify an array of projects in the packagesToPack parameter? So far, the version is the same for each package, so I don't need three different blocks...

Note: these 3 projects are all 3 NetStandard and properties for package building are stored in csproj directly

Answer 1

For above code I got this exception running a build:

my-template.yml (Line: 1, Col: 12): Unexpected value ''

but this works for me:

# my-template.yml
parameters:
- name: projects
  type: object
  default: {}
steps:
- ${{ each project in parameters.projects }}:
  - task: PublishBuildArtifacts@1
    displayName: 'Publish ${{ project }}
    inputs:
      PathtoPublish: '$(Build.ArtifactStagingDirectory)/${{ project }}.zip'

and then:

# ci.yml
steps:
- template: my-template.yml
  parameters:
    projects:
    - test1
    - test2

Answer 2

you can use each function (if its available at all at this point in time):

# my-template.yml
parameters:
steps:
- ${{ each project in parameters.projects }}:
  - task: PublishBuildArtifacts@1
    displayName: Publish ${{ project }}
    inputs:
      PathtoPublish: '$(Build.ArtifactStagingDirectory)/${{ project }}.zip'

# ci.yml
steps:
- template: my-template.yml
  parameters:
    projects:
    - test1
    - test2

Github PR for this functionality: https://github.com/Microsoft/azure-pipelines-yaml/pull/2#issuecomment-452748467