使用Windows PowerShell计算压缩文件中的行数。

Question

有一个文件夹，里面有超过1000个压缩文件，每个压缩文件包含12个其他压缩文件，每个文件包含一个CSV文件。每个压缩文件包含12个其他压缩文件，每个文件包含一个CSV文件。我需要计算所有文件的总行数。

可以用windows powershell来完成，但是为了节省磁盘空间，解压文件，计算行数，然后再压缩，我遇到了麻烦。

$folderPath="C:\_Unzip_Folder";

Get-ChildItem $folderPath -recurse | %{ 

    if($_.Name -match "^*.`.zip$")
    {
        $parent="$(Split-Path $_.FullName -Parent)";    
        write-host "Extracting $($_.FullName) to $parent"

        $arguments=@("e", "`"$($_.FullName)`"", "-o`"$($parent)`"");
        $ex = start-process -FilePath "`"C:\Program Files\7-Zip\7z.exe`"" -ArgumentList $arguments -wait -PassThru;

        if( $ex.ExitCode -eq 0)
        {
            write-host "Extraction successful, deleting $($_.FullName)"
            rmdir -Path $_.FullName -Force
        }
    }
}

Get-ChildItem $folderPath -recurse -Filter *.csv | %{ 
    Get-Content $($_.FullName)  | Measure-Object -Line
}

cmd /c pause | out-null

现在，它是计算行数，但是，它可以更容易，如果它SUM他们给我。

有人能帮助我完成这个任务吗？

谢谢大家。

Answer 1

你也可以把所有的文件都保存在内存中，像这样。

Set-StrictMode -Version "Latest"
$ErrorActionPreference = "Stop"
$InformationPreference = "Continue"

Add-Type -Assembly "System.IO.Compression.FileSystem"

$folderPath = "C:\_Unzip_Folder\*.zip"
$files      = Get-ChildItem $folderPath -Recurse
$csvCount   = 0
$lineCount  = 0
$bufferSize = 1MB
$buffer     = [byte[]]::new($bufferSize)

foreach ($file in $files)
{
    Write-Information "Getting information from '$($file.FullName)'"

    $zip  = [System.IO.Compression.ZipFile]::OpenRead($file.FullName)
    $csvs = $zip.Entries | Where-Object { [System.IO.Path]::GetExtension($_.Name) -eq ".csv" }
    foreach ($csv in $csvs)
    {
        $csvCount++
        Write-Information "Counting lines in '$($csv.FullName)'"

        $stream = $csv.Open()
        try
        {
            $byteCount = $stream.Read($buffer, 0, $bufferSize)
            while ($byteCount)
            {
                for ($i = 0; $i -lt $byteCount; $i++)
                {
                    # assume line feed (LF = 10) is the end-of-line marker
                    # you could also use carriage return (CR = 13)
                    if ($buffer[$i] -eq 10) { $lineCount++ }
                }
                $byteCount = $stream.Read($buffer, 0, $bufferSize)
            }
        }
        finally
        {
            $stream.Close()
        }
    }
}

Write-Information "Counted a total of $lineCount line(s) in $csvCount CSV-file(s)"