powershell - 在PowerShell中验证编号的变量

Question

我正在编写一个脚本，用于根据用户提供的变量值生成文本文件。这些变量是通过另一个应用程序提供的，它们作为环境变量进入Windows。

所以我有以下内容:

[hashtable]$variables = @{InstallPath = $env:InstallPath; ADBaseOUValue1 = $env:ADBaseOUValue1; ADBaseOUValue2 = $env:ADBaseOUValue2; LDAPQueryValue1 = $env:LDAPQueryValue1; LDAPQueryValue2 = $env:LDAPQueryValue2}

该哈希表被截断，用户最多可以定义15个ADBaseOU和15个LDAP查询，还提供了其他变量，但是没有对它们进行编号。

现在，我需要验证数据。

我需要确保ADBaseOUValue1和LDAPQueryValue1不为空

我需要确保ADBaseOUValue1匹配正则表达式

我需要确保，如果LDAPQueryValue1具有与号(＆)不符的“＆”，我将其替换为

然后，我需要对用户提供的任何ADBaseOUValue＃和LDAPQueryValue＃进行检查2和3。

我正在对其他变量(例如$ env:InstallPath)进行数据验证，以确保它们不为null并具有预期的数据类型。

在变量$ env:ADBaseOUValue2到15和$ env:LDAPQueryValue2到15中，我将如何:

对其正则表达式

进行“如果”检查时，定义变量名称

在执行“＆”

的“替换”时定义变量名称

验证变量后，值将进入Here字符串，例如:

<setting name="ADBaseOU1" serializeAs="String">
    <value>$env:ADBaseOUValue1</value>
</setting>
<setting name="ADBaseOU2" serializeAs="String">
    <value>$env:ADBaseOUValue2</value>
</setting>

谢谢，这是我现在所拥有的(用于验证部分):

Switch ($variables.GetEnumerator()) {
    {($_.Name -eq "ADBaseOUValue1") -and ($_.Value -ne $null)} {
        If ($env:ADBaseOUValue1 -notmatch $ldapUrlRegex) {
            Write-Host ("{0}: The variable `"{1}`" was not a valid LDAP URL. Please re-run the script and provide a valid value for the variable." -f (Get-Date -Format s), $_.Name)

            $variableErrorCount++
        }
    }
    {($_.Name -eq "ADBaseOUValue1") -and ($_.Value -eq $null)} {
        If ($env:ADBaseOUValue1 -notmatch $ldapUrlRegex) {
            Write-Host ("{0}: The variable `"{1}`" was null. Please re-run the script and provide a value for the variable." -f (Get-Date -Format s), $_.Name)

            $variableErrorCount++
        }
    }
    {($_.Name -match "ADBaseOUValue(\d+)$") -and ($_.Name -ne "ADBaseOUValue1") -and ($_.Value -ne $null)} {
        If ($env:ADBaseOUValue1 -notmatch $ldapUrlRegex) {
            Write-Host ("{0}: The variable `"{1}`" was not a valid LDAP URL. Please re-run the script and provide a valid value for the variable." -f (Get-Date -Format s), $_.Name)

            $variableErrorCount++
        }
    }
    {($_.Name -eq "LDAPQueryValue1") -and ($_.Value -ne $null)} {
        If ($env:LDAPQueryValue1 -notmatch "&") {
            Write-Host ("{0}: Replacing `"&`" with `"&`" in {1}." -f (Get-Date -Format s), $_.Name)

            $env:LDAPQueryValue1 = $env:LDAPQueryValue1.Replace("&", "&")
        }
    }
    {($_.Name -eq "LDAPQueryValue1") -and ($_.Value -eq $null)} {
        If ($env:ADBaseOUValue1 -notmatch $ldapUrlRegex) {
            Write-Host ("{0}: The variable `"{1}`" was null. Please re-run the script and provide a value for the variable." -f (Get-Date -Format s), $_.Name)

            $variableErrorCount++
        }
    }
    {($_.Name -match "LDAPQueryValue(\d+)$") -and ($_.Name -ne "LDAPQueryValue1") -and ($_.Value -ne $null)} {
        If ($env:??? -notmatch "&") {
            Write-Host ("{0}: Replacing `"&`" with `"&`" in {1}." -f (Get-Date -Format s), $_.Name)

            $env:??? = $env:???.Replace("&", "&")
        }
    }
}

Answer 1

听起来您需要的是变量间接访问，即通过存储在变量中的名称间接访问环境变量；例如。:

$env:Foo = 'bar' # sample env. var.

$varName = 'Foo' # the name of that env. var to use for indirect access

# To GET the value, via PS drive Env:
(Get-Item Env:$varName).Value # same as: $env:Foo

# To SET the value:
Set-Item Env:$varName 'new value' # same as: $env:Foo = 'new value'

在您的命令上下文中:

# ...

{$_.Name -match "LDAPQueryValue(\d+)$") -and ($_.Name -ne "LDAPQueryValue1") -and ($_.Value -ne $null)} {
  $currVal = (Get-Item Env:$($_.Name)).Value
  If ($currVal -notmatch "&") {
      Write-Host ("{0}: Replacing `"&`" with `"&`" in {1}." -f (Get-Date -Format s), $_.Name)

      Set-Item Env:$($_.Name) $currVal.Replace("&", "&")
  }
}

# ...