如何在Azure DevOps YAML流水线中设置步骤定时执行？

一、为步骤设置工作日EST中午的调度 #

要让发布步骤等待到工作日美国东部时间（EST）中午执行，可通过PowerShell脚本计算等待时长并实现延迟，完全匹配0 12 * * 1-5的cron规则，无需依赖额外插件：

PowerShell实现示例 #

steps:
- powershell: |
    # 切换到EST时区
    $estTimeZone = [System.TimeZoneInfo]::FindSystemTimeZoneById("Eastern Standard Time")
    $currentEstTime = [System.TimeZoneInfo]::ConvertTimeFromUtc((Get-Date).ToUniversalTime(), $estTimeZone)
    
    # 判断当前是否为工作日且未到12点
    if ($currentEstTime.DayOfWeek -ge 1 -and $currentEstTime.DayOfWeek -le 5) {
        if ($currentEstTime.Hour -lt 12) {
            $waitDuration = (New-TimeSpan -Start $currentEstTime -End (Get-Date $currentEstTime -Hour 12 -Minute 0 -Second 0)).TotalSeconds
            Write-Host "等待 $([math]::Round($waitDuration)) 秒，直到EST中午12点执行"
            Start-Sleep -Seconds $waitDuration
        }
    } else {
        # 非工作日，计算到下周一EST12点的等待时间
        $daysToMonday = 1 - [int]$currentEstTime.DayOfWeek + 7
        $nextMonday12 = (Get-Date $currentEstTime).AddDays($daysToMonday) | Get-Date -Hour 12 -Minute 0 -Second 0
        $waitDuration = (New-TimeSpan -Start $currentEstTime -End $nextMonday12).TotalSeconds
        Write-Host "当前为非工作日，等待 $([math]::Round($waitDuration)) 秒，直到下周一EST中午12点执行"
        Start-Sleep -Seconds $waitDuration
    }
  displayName: '等待至工作日EST中午'

- script: echo "执行核心发布步骤"
  displayName: '发布步骤'

二、为每个步骤单独设置调度 #

完全可以为每个步骤配置独立的调度逻辑，只需在目标步骤前添加专属的等待脚本任务即可。比如让步骤1等待当天工作日中午，步骤2等待下一工作日中午：

steps:
# 步骤1：等待当天工作日EST中午
- powershell: |
    $estTimeZone = [System.TimeZoneInfo]::FindSystemTimeZoneById("Eastern Standard Time")
    $currentEstTime = [System.TimeZoneInfo]::ConvertTimeFromUtc((Get-Date).ToUniversalTime(), $estTimeZone)
    
    if ($currentEstTime.DayOfWeek -ge 1 -and $currentEstTime.DayOfWeek -le 5) {
        if ($currentEstTime.Hour -lt 12) {
            $waitDuration = (New-TimeSpan -Start $currentEstTime -End (Get-Date $currentEstTime -Hour 12 -Minute 0 -Second 0)).TotalSeconds
            Start-Sleep -Seconds $waitDuration
        }
    } else {
        $daysToMonday = 1 - [int]$currentEstTime.DayOfWeek + 7
        $nextMonday12 = (Get-Date $currentEstTime).AddDays($daysToMonday) | Get-Date -Hour 12 -Minute 0 -Second 0
        $waitDuration = (New-TimeSpan -Start $currentEstTime -End $nextMonday12).TotalSeconds
        Start-Sleep -Seconds $waitDuration
    }
  displayName: '步骤1：等待至当天工作日EST中午'
- script: echo "执行发布步骤1"
  displayName: '发布步骤1'

# 步骤2：等待下一工作日EST中午
- powershell: |
    $estTimeZone = [System.TimeZoneInfo]::FindSystemTimeZoneById("Eastern Standard Time")
    $currentEstTime = [System.TimeZoneInfo]::ConvertTimeFromUtc((Get-Date).ToUniversalTime(), $estTimeZone)
    
    # 判断是否需要等待到下一个工作日
    $nextWorkday = $currentEstTime
    if ($currentEstTime.DayOfWeek -eq 5) { # 周五，跳转到周一
        $nextWorkday = $currentEstTime.AddDays(3)
    } elseif ($currentEstTime.DayOfWeek -eq 6) { # 周六，跳转到周一
        $nextWorkday = $currentEstTime.AddDays(2)
    } elseif ($currentEstTime.DayOfWeek -eq 0) { # 周日，跳转到周一
        $nextWorkday = $currentEstTime.AddDays(1)
    } elseif ($currentEstTime.Hour -ge 12) { # 工作日已过12点，跳转到次日
        $nextWorkday = $currentEstTime.AddDays(1)
    }
    
    $nextWorkday12 = Get-Date $nextWorkday -Hour 12 -Minute 0 -Second 0
    $waitDuration = (New-TimeSpan -Start $currentEstTime -End $nextWorkday12).TotalSeconds
    Write-Host "等待 $([math]::Round($waitDuration)) 秒，直到下一工作日EST中午12点执行"
    Start-Sleep -Seconds $waitDuration
  displayName: '步骤2：等待至下一工作日EST中午'
- script: echo "执行发布步骤2"
  displayName: '发布步骤2'

三、跳过调度实现快速部署 #

通过添加流水线变量可以快速切换调度模式，实现一键跳过等待逻辑：

1. 在流水线定义中添加布尔变量SkipSchedule，默认值设为false
2. 修改等待脚本，优先检查该变量：

steps:
- powershell: |
    # 检查是否启用快速部署
    if ($env:SkipSchedule -eq "true") {
        Write-Host "已触发快速部署，跳过调度等待"
        exit 0
    }
    
    # 以下为原等待逻辑
    $estTimeZone = [System.TimeZoneInfo]::FindSystemTimeZoneById("Eastern Standard Time")
    $currentEstTime = [System.TimeZoneInfo]::ConvertTimeFromUtc((Get-Date).ToUniversalTime(), $estTimeZone)
    
    if ($currentEstTime.DayOfWeek -ge 1 -and $currentEstTime.DayOfWeek -le 5) {
        if ($currentEstTime.Hour -lt 12) {
            $waitDuration = (New-TimeSpan -Start $currentEstTime -End (Get-Date $currentEstTime -Hour 12 -Minute 0 -Second 0)).TotalSeconds
            Start-Sleep -Seconds $waitDuration
        }
    } else {
        $daysToMonday = 1 - [int]$currentEstTime.DayOfWeek + 7
        $nextMonday12 = (Get-Date $currentEstTime).AddDays($daysToMonday) | Get-Date -Hour 12 -Minute 0 -Second 0
        $waitDuration = (New-TimeSpan -Start $currentEstTime -End $nextMonday12).TotalSeconds
        Start-Sleep -Seconds $waitDuration
    }
  displayName: '等待至工作日EST中午'
  env:
    SkipSchedule: $(SkipSchedule)

- script: echo "执行发布步骤"
  displayName: '发布步骤'

触发流水线时，只需将SkipSchedule变量设置为true，即可直接跳过等待逻辑执行发布。

内容的提问来源于stack exchange，提问作者FoxDeploy