Recursively find the packages.config files and generate a unique list of all the Nuget packages in use.

ListNugetPackages.ps1

[CmdletBinding()]
param(
    [Parameter(Mandatory = $true)]
    $Path
)

$packages = @()

ls -Path $Path -Include packages.config -Recurse -File | % {
    $xml = [xml](Get-Content $_)

    $xml.packages.package | % {
        $url = "https://www.nuget.org/packages/{0}" -f $_.id
        $downloadUrl = "https://www.nuget.org/api/v2/package/{0}/{1}" -f $_.id, $_.version
        
        Add-Member -NotePropertyName Url -NotePropertyValue $url -InputObject $_
        Add-Member -NotePropertyName DownloadUrl -NotePropertyValue $downloadUrl -InputObject $_

        if (-not $packages.Contains($downloadUrl)) {
            $packages += $downloadUrl
            Write-Output $_
        }
    }
}