PowerShell 并行处理文件 - 错误

Question

我对下面的代码有疑问，并且无法弄清楚为什么我丢失了一些东西。有人可以帮我吗？我还包含了该错误，我正在使用 PowerShell v7。

谢谢

错误：

Line |
 109 |      $results = $files | ForEach-Object -Parallel {
     |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Parameter set cannot be resolved using the specified named parameters. One or more parameters issued cannot be
     | used together or an insufficient number of parameters were provided.

代码：

$allResults = @()

foreach ($searchPath in $searchPaths) {
    if (!(Test-Path -Path $searchPath)) {
        Write-Output "Path does not exist: $searchPath"
        continue
    }
    
    Write-Output "Searching in path: $searchPath"

    # Get all files in the search path with specified types
    $files = Get-ChildItem -Path $searchPath -Recurse -Force -ErrorAction SilentlyContinue | Where-Object {
        $fileTypes -contains $_.Extension.ToLower()
    }

    # Ensure that we have files to process
    if ($files.Count -eq 0) {
        Write-Output "No files found in path: $searchPath"
        continue
    }

    # Process files in parallel
    $results = $files | ForEach-Object -Parallel {
        param (
            [string]$FilePath,
            [hashtable]$Patterns
        )
        
        try {
            # Call the search function and return results
            return Search-PIIInFile -filePath $FilePath -patterns $Patterns
        } catch {
            Write-Output "Error processing file ${FilePath}: $_"
        }
    } -ArgumentList $_.FullName, $patterns -ThrottleLimit 10

    # Aggregate results from parallel processing
    $allResults += $results
}

Answer 1

-ArgumentList

仅在

PropertyAndMethodSet

参数集中可用：

(Get-Command ForEach-Object).Parameters['ArgumentList'].ParameterSets

# Key                  Value
# ---                  -----
# PropertyAndMethodSet System.Management.Automation.ParameterSetMetadata

并且

-Parallel

仅在

ParallelParameterSet

参数集中可用：

(Get-Command ForEach-Object).Parameters['Parallel'].ParameterSets

# Key                  Value
# ---                  -----
# ParallelParameterSet System.Management.Automation.ParameterSetMetadata

这就是您收到此错误的原因，

-Parallel

和

-ArgumentList

由于不在同一参数集中而无法一起使用。

您可以通过使用

$using:

范围修饰符获取局部变量并删除

-ArgumentList

来修复代码：

$results = $files | ForEach-Object -Parallel {
    $FilePath = $using:_.FullName
    $Patterns = $using:patterns # <= unclear where is `$Patterns` defined outside this context

    try {
        # Call the search function and return results
        return Search-PIIInFile -filePath $FilePath -patterns $Patterns
    }
    catch {
        Write-Output "Error processing file ${FilePath}: $_"
    }
}