azure-devops - 在 Azure devops YAML 中循环动态模板参数

Question

我想对作为参数传递的字符串数组执行一些操作(发布)。问题是，这个参数是动态的:

# pipeline.yml

- job: MyJob
    pool:
      [...]
    steps:
      - pwsh: |
          $affected = ['app-one', 'app-two'] # Here I hardcoded the array but in my real code this is set dynamically
          Write-Host "##vso[task.setvariable variable=affected;isOutput=true]$affected"
        name: setAffected
        displayName: 'Settings affected'

- template: ./build.yml
  parameters:
    affected: $[ dependencies.Affected.outputs['setAffected.affected'] ] # Here I pass the array of string to the template

# build.yml

parameters:
  affected: ''

jobs:
  - job: Build
    condition: succeeded('Affected')
    dependsOn: Affected
    pool:
      [...]
    variables:
      affected: ${{ parameters.affected }}
    steps:
      - ${{each app in $(affected)}}:
          - pwsh: |
              Write-Host "${{app}}"
      - ${{each app in parameters.affected}}:
          - pwsh: |
              Write-Host "${{app}}"

${{each app in $(affected)}} 或 ${{each app in parameters.affected}} 都不起作用...我如何设法对我的每个数组项执行一些操作？

谢谢

Answer 1

Within a template expression, you have access to the parameters context that contains the values of parameters passed in. Additionally, you have access to the variables context that contains all the variables specified in the YAML file plus the system variables. Importantly, it doesn't have runtime variables such as those stored on the pipeline or given when you start a run. Template expansion happens very early in the run, so those variables aren't available.

https://learn.microsoft.com/en-us/azure/devops/pipelines/process/templates?view=azure-devops