下面所示的天蓝色管道中的变量“组件”没有得到更新？

Question

尽管 ("$(Resources.TriggeringAlias)" -eq "CCM_LV_Pipeline") 的结果为 true 下面所示的天蓝色管道中的变量“组件”没有更新？

variables:
  newrel: "0.4.7"
  component: ""
trigger: none
pr: none
pool:
  name: CC-DEV
resources:
  pipelines:
    - pipeline: CCM_LV_Pipeline
      source: HYBM_CCM_LV
      project: CC-Wolf
      trigger:
        branches:
          include:
            - '*'
jobs:
  - job: DetermineComponentDirectory
    displayName: "Determine Component Directory"
    steps:
      - checkout: none
      - powershell: |
          if ("$(Resources.TriggeringAlias)" -eq "CCM_LV_Pipeline") {
              Write-Host "CCM_LV_Pipeline in CC-Wolf succeeded"
              Write-Output "##vso[task.setvariable variable=component;isOutput=true]$(Build.SourcesDirectory)\assets\ccm-lv"
          }
          else {
              Write-Host "No successful pipeline found in CC-Wolf. Using default component directory."
              Write-Output "##vso[task.setvariable variable=component;isOutput=true]$(Build.SourcesDirectory)\assets\default"
          }
          Write-Host "Component directory set to: $(component)"
        displayName: "Set Component Directory"
    ```

Answer 1

正如您在另一种情况中所澄清的那样，以下命令行是创建一个与现有通用变量不同的输出变量，即使它们具有相同的名称（组件）。他们有不同的表达方式来获取他们的价值观。

Write-Output "##vso[task.setvariable variable=component;isOutput=true]xxxx"

此外，在调用“

setvariable

”命令设置/更新变量的PowerShell任务上，新值不适用于当前PowerShell任务。新值仅适用于后续任务。

---

如果您只想更新现有通用变量（component）的值并且只想在当前作业中使用新值（DetermineComponentDirectory），您应该使用如下命令。

variables:
  newrel: "0.4.7"
  component: "$(Build.SourcesDirectory)/assets/default"  # The default component directory.

resources:
  pipelines:
  . . .

jobs:
- job: DetermineComponentDirectory
  displayName: "Determine Component Directory"
  steps:
  - task: PowerShell@2
    displayName: "Set Component Directory"
    inputs:
      targetType: inline
      script: |
        if("$(Resources.TriggeringAlias)" -eq "CCM_LV_Pipeline") {
          Write-Host "CCM_LV_Pipeline in CC-Wolf succeeded"
          Write-Output "##vso[task.setvariable variable=component;]$(Build.SourcesDirectory)/assets/ccm-lv"
        }
        else {
          Write-Host "No successful pipeline found in CC-Wolf. Using the default component directory."
        }
  
  - task: PowerShell@2
    displayName: 'Print component directory'
    inputs:
      targetType: inline
      script: Write-Host "Component directory set to $(component)"

---

如果您还想将更新后的值传递给同一管道中的后续作业或阶段，您可以坚持将其设置为输出变量。关于输出变量，可以看到“使用任务中的输出变量”。

variables:
  newrel: "0.4.7"

resources:
  pipelines:
  . . .

stages:
- stage: A
  jobs:
  - job: DetermineComponentDirectory
    displayName: "Determine Component Directory"
    steps:
    - task: PowerShell@2
      displayName: 'Set Component Directory'
      name: setCompDir
      inputs:
        targetType: inline
        script: |
          if("$(Resources.TriggeringAlias)" -eq "CCM_LV_Pipeline") {
            Write-Host "CCM_LV_Pipeline in CC-Wolf succeeded"
            Write-Output "##vso[task.setvariable variable=component;isOutput=true]$(Build.SourcesDirectory)/assets/ccm-lv"
          }
          else {
            Write-Host "No successful pipeline found in CC-Wolf. Using the default component directory."
            Write-Output "##vso[task.setvariable variable=component;isOutput=true]$(Build.SourcesDirectory)/assets/default"
          }
    
    - task: PowerShell@2
      displayName: 'Print component directory'
      inputs:
        targetType: inline
        script: Write-Host "Component directory set to $(setCompDir.component)"
  
  # Pass the output variable to another job within the same stage.
  - job: A2
    dependsOn: DetermineComponentDirectory  # Must dependsOn the previous job which generates the output variable.
    variables:
      ComponentDirectory: $[ dependencies.DetermineComponentDirectory.outputs['setCompDir.component'] ]
    steps:
    - task: PowerShell@2
      displayName: 'Print component directory'
      inputs:
        targetType: inline
        script: Write-Host "The Component directory is $(ComponentDirectory)"

# Pass the output variable to another stage within the same pipeline.
- stage: B
  dependsOn: A  # Must dependsOn the previous stage which generates the output variable.
  variables:
    ComponentDirectory: stageDependencies.A.DetermineComponentDirectory.outputs['setCompDir.component']
  jobs:
  - job: B1
    steps:
    - task: PowerShell@2
      displayName: 'Print component directory'
      inputs:
        targetType: inline
        script: Write-Host "The Component directory is $(ComponentDirectory)"

---