Renames and moves PSN PKGs into folders

Organize-Content.ps1

#!/bin/pwsh
if ($PSVersionTable.PSVersion.Major -lt 6)
{
    Write-Host "This script requires PowerShell 6.0 or newer"
    Write-Host "Trying to restart..."
    &pwsh $PSCommandPath
}

$content_id_matcher = [regex]'(?<content_id>(?<service_id>(?<service_letters>\w\w)(?<service_number>\d{4}))-(?<product_id>(?<product_letters>\w{4})(?<product_number>\d{5}))_(?<part>\d\d)-(?<label>\w{16}))'
$pkgs = @(Get-ChildItem *.pkg)
foreach ($pkg in $pkgs)
{
    $header = Get-Content -LiteralPath $pkg.FullName -AsByteStream -TotalCount 84 -ReadCount 84
    $id = [System.Text.Encoding]::ASCII.GetString($header, 48, 36)
    $match = $content_id_matcher.Match($id)
    if (-not ($match.Success))
    {
        Write-Warning "Failed to organize $($pkg.Name) (invalid content id $id)"
        continue
    }

    $product_code = $match.Groups['product_id'].Value
    $full_path = $pkg.FullName
    if ($pkg.Name -notlike "*$product_code*")
    {
        $new_name = "$id.pkg"
        Write-Host "Renaming $($pkg.Name) to $new_name"
        Rename-Item -LiteralPath $pkg.FullName -NewName $new_name
        $full_path = Join-Path (Split-Path $pkg.FullName -Parent) $new_name
    }

    $folder_prefix = "[$product_code]"
    $folders = @(Get-ChildItem . -Directory -Filter "$folder_prefix*")
    $folder = $folder_prefix
    if ($folders.Length -eq 0)
    {
        Write-Host "Creating folder $folder_prefix"
        New-Item $folder_prefix -ItemType Directory | Out-Null
    }
    else
    {
        $folder = $folders[0].FullName
    }
    Write-Host "Moving $(Split-Path $full_path -Leaf) to $(Split-Path $folder -Leaf)"
    Move-Item -LiteralPath $full_path -Destination $folder
}