Question

我正在尝试使用powershell创建一个唯一的文件夹名称。这导致无限循环。 else部分中的代码永远不会执行，它试图使文件夹名称唯一。

$dirname = "\\" + $ServerName + "\d$\inetpub\Staging\Cms-" + $today.ToString("yyyyMMdd")

    $found = 0
$counter = 1
$newDirName = $dirname
Do
{   
   $LogMessage = "Checking directory: " + $newDirName
   write-host "##teamcity[message text='$LogMessage']"

    if(!(Test-Path $newDirName))
    {
        $dirname = $newDirName
        $found = 1
    }
    else
    {
        $newDirName = $dirname + "-v" + $counter
        $LogMessage = "Checking NEW directory: " + $newDirName
        write-host "##teamcity[message text='$LogMessage']"
        $counter++
    }
}
Until($found -lt 1)

MD $dirname | Out-Null
    $LogMessage = "Created directory: " + $dirname
    write-host "##teamcity[message text='$LogMessage']"

以下作品如下：

if(!(Test-Path $dirname))
    {
        MD $dirname | Out-Null
        $LogMessage = "Created directory: " + $dirname
        write-host "##teamcity[message text='$LogMessage']"

    }
    else
    {
        $dirname = $dirname + "v2"
        if(!(Test-Path $dirname))
        {
            MD $dirname | Out-Null
            $LogMessage = "Created directory: " + $dirname
            write-host "##teamcity[message text='$LogMessage']"
        }
        else
        {
            $LogMessage = "Unable to deploy, the directory: " + $ServerName + " is already in use."
            write-host "##teamcity[message text='$LogMessage']"
            exit 1
        }
    }

你看到我在这里做错了吗？

感谢。

Answer 1

我建议您使用ISE并使用断点调试脚本。答案很快就变得明显了。你的do while循环运行直到$ found小于1.但它在do循环中从不设置为1以外的任何东西，所以它永远不会爆发。我认为这可以做你想要的。

$dirname = "\\" + $ServerName + "\d$\inetpub\Staging\Cms-" + $today.ToString("yyyyMMdd")
$newDirName = $dirname
#Variable to hold a boolean for whether the directory was created or not
$dirCreated = $false
do{
    #If directory does not exist
    if(!(Test-Path $newDirName)){
        #create it
        md $newDirName | out-null
        #set variable that we are testing for to true
        $dirCreated = $true
    }
    else
    {
        #directory exists so adjust the name and try again
        $newDirName = $dirname + "-v" + $counter
        $counter++
    }
}
while(!$dirCreated)
#loops until a directory is created

Powershell循环问题

1 个答案: