yml pipeline: publish artifact with code from multiple repositories

Question

I am attempting to build code from multiple repositories and publish it as a single build artifact.

When I checkout another repository it clears the ArtifactStagingDirectory.

Is there a way to save code between jobs?

resources:
  repositories:
  - repository: A
    type: git
    name: Engineering/A
    ref: master
  - repository: B
    type: git
    name: Engineering/B
    ref: pipeline_publish

jobs:
- job: jobA
  steps:
  - checkout: A
  - template: Pipelines/BuildTemplate.yml@A
  - template: Pipelines/CopyPluginsTemplate.yml@A
    parameters:
      destinationFolder: A

- job: jobB
  steps:
  - checkout: B
  - template: Pipelines/BuildTemplate.yml@A
  - template: Pipelines/CopyPluginsTemplate.yml@A
    parameters:
      destinationFolder: B

- job: jobPublishArtifact
  dependsOn:
  - jobA
  - jobB
  steps:
  - task: PublishBuildArtifacts@1
    displayName: Publish Files to be used by the Release build
    inputs:
      PathtoPublish: '$(Build.BinariesDirectory)'
      ArtifactName: 'HMI'
      publishLocation: 'Container'

Answer 1

As a simple answer, No. However, if you want to "play" with artifacts, you can download the build results of the previous agent run. As example:

Stage 1:

pool:
  name: Azure Pipelines

steps:
- script: 'echo "Write your commands here" >> $(Build.ArtifactStagingDirectory)/fl1.txt'
  displayName: 'Command Line Script'

- task: PublishPipelineArtifact@1
  displayName: 'Publish Pipeline Artifact'
  inputs:
    targetPath: '$(Build.ArtifactStagingDirectory)'
    artifact: drop

Stage 2:

pool:
  name: Azure Pipelines

steps:
- script: |
   echo "Hello world"  >> $(Build.ArtifactStagingDirectory)/fl2.txt
  displayName: 'Command Line Script'

- task: DownloadPipelineArtifact@2
  displayName: 'Download Pipeline Artifact'
  inputs:
    artifactName: drop
    targetPath: '$(Build.ArtifactStagingDirectory)'

- task: PublishPipelineArtifact@1
  displayName: 'Publish Pipeline Artifact'
  inputs:
    targetPath: '$(Build.ArtifactStagingDirectory)'
    artifact: drop1

The build results: