VSTS - 有没有办法只在特定任务失败时才运行任务？

Question

我需要在我的构建定义中运行一个发布任务，但前提是它之前的某个任务失败了。如果其他任务通过，我希望它被忽略而不运行。

有没有办法做到这一点？

我希望我可以根据任务成功设置输出变量，然后在自定义条件下使用该变量在任务失败时运行任务。

如果任务失败，我看不到如何设置输出变量。这可能吗？

Answer 1

• 在任务设置中展开“控制选项”
• 在“运行此任务”中选择 - Only when a previous task has failed。

如果您只想在最后一个/特定任务失败时运行该任务：

假设您的特定任务（您检查的关于其状态的任务）称为A。目标是仅在 A 失败的情况下调用另一个构建任务（比如说B）。

• 定义一个custom build variable，称它为task.A.status并设置为success
• 创建另一个构建任务，例如C 并安排在 A 之后；将其设置为仅在 A 失败时运行 - 有一个标准条件
• 任务 C 应该只做一件事 - 将 task.A.status 构建变量设置为“失败”（就像这样，如果我们使用 PowerShell：Write-Host "##vso[task.setvariable variable=task.A.status]failure"）
• 最后，任务B被安排在C和is conditioned之后的某个时间运行，以防task.A.status等于failure，就像这样：eq(variables['task.A.status'], 'failure')

Answer 2

您可以使用构建 REST API 通过 PowerShell 检查以前的任务，例如检查 taskA（显示名称）并在 taskA 失败时运行 taskB：

1. 检查阶段中的Allow scripts to access the OAuth token 选项
2. 添加 PowerShell 任务（运行此任务：Only when a previous task has failed；参数：-targetTaskName "taskA" -collectionURL $(Build.Repository.Uri) -projectName $(System.TeamProject) -buildId $(Build.BuildId) -token $(System.AccessToken)）

代码：

param(
    [string]$token,
        [string]$targetTaskName,
        [string]$collectionURL,
        [string]$projectName,
        [string]$buildId
    )
    $buildTimelineREST="$collectionURL$projectName/_apis/build/builds/$buildId/Timeline?api-version=4.1"
    $base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f "test",$token)))
    $result= Invoke-RestMethod -Method GET -Uri $buildTimelineREST -ContentType "application/json" -Headers @{Authorization=("Basic {0}" -f $base64AuthInfo)}
    $targetTask=$result.records | where { $_.Name -eq $targetTaskName }
    Write-Host $targetTask.result
    if($targetTask.result -eq "failed"){
        Write-Host "##vso[task.setvariable variable=isTaskAFailed;]true"
    }

1. taskB（运行此任务：Custom conditions；自定义条件：eq(variables['isTaskAFailed'],'true'）

Answer 3

除了starian chen-MSFT 的代码，它适用于构建管道，下面是我为发布管道收集的代码（以防它对任何人有用）。这将输出一个管道变量“deploymentStatus”，它等于任务的状态（由 Azure DevOps 定义：https://docs.microsoft.com/en-us/rest/api/azure/devops/release/releases/get%20release?view=azure-devops-rest-5.1#taskstatus）：

$targetTaskName = "Some Task Name"
$token = $env:System_AccessToken
$releaseURL = $env:System_TeamFoundationServerUri
$projectName = $env:System_TeamProject
$releaseId= $env:Release_ReleaseId
$environmentId = $env:Release_EnvironmentId
$releaseAttemptNumber = $env:Release_AttemptNumber

$releaseREST="$releaseURL$projectName/_apis/release/releases/$releaseId/environments/$environmentId/?api-version=5.1-preview.6"
Write-Host "GET request to Azure Pipelines with URL: $releaseREST"
$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f "test",$token)))
$result= Invoke-RestMethod -Method GET -Uri $releaseREST -ContentType "application/json" -Headers @{Authorization=("Basic {0}" -f $base64AuthInfo)}

$targetReleaseAttempt = $result.deploySteps | where { $_.attempt -eq $releaseAttemptNumber}
$targetTask = $targetReleaseAttempt.releaseDeployPhases.deploymentJobs.tasks | where { $_.name -eq $targetTaskName }
$targetTask

$targetTaskStatus = $targetTask.status
Write-Host "Setting variable deploymentStatus to $targetTaskStatus"
Write-Host "##vso[task.setvariable variable=deploymentStatus;]$targetTaskStatus"

Answer 4

根据@Merivale 的回答，这是对我有用的代码；

$targetTaskName = "SomeTaskName"

$pat = ":$(System.AccessToken)"
$b  = [System.Text.Encoding]::ASCII.GetBytes($pat)
$token = [System.Convert]::ToBase64String($b)

$releaseURL="$(System.TeamFoundationServerUri)"
$releaseId= $(Release.ReleaseId)
$environmentId = $(Release.EnvironmentId)
$releaseAttemptNumber = $(Release.AttemptNumber)

$releaseREST_p1="$releaseURL"
$releaseREST=$releaseREST_p1+"$(System.TeamProject)/_apis/release/releases/$releaseId/environments/$environmentId/?api-version=5.1-preview.6"
Write-Host "GET request to Azure Pipelines with URL: $releaseREST"

$result= Invoke-RestMethod -Method GET -Uri $releaseREST -ContentType "application/json" -Headers @{'Authorization' = "Basic $token"}

$targetReleaseAttempt = $result.deploySteps | where { $_.attempt -eq $releaseAttemptNumber}
$targetTask = $targetReleaseAttempt.releaseDeployPhases.deploymentJobs.tasks | where { $_.name -eq $targetTaskName }
$targetTask

$targetTaskStatus = $targetTask.status
Write-Host "Setting variable releaseStatus to $targetTaskStatus"
Write-Host "##vso[task.setvariable variable=releaseStatus;]$targetTaskStatus"