Update a local Nuget repo from a remote repo

Update-LocalNugetRepository.ps1

Set-StrictMode -Version Latest
# Inspired by: https://weblogs.asp.net/jongalloway/downloading-a-local-nuget-repository-with-powershell

function Update-LocalNugetRepository {
    <# .SYNOPSIS
    Update a local Nuget repo from a remote repo #>
    Param(
        # Remote repository feed URL
        [Uri]$FeedURLBase = 'https://aka.ms/sme-extension-feed',
        # Local repository directory
        [IO.DirectoryInfo]$Destination = [IO.Path]::Join([Environment]::GetFolderPath('MyDocuments'), 'NuGetLocal'),
        # Overwrite local file if it exists
        [switch]$Overwrite,
        # Number of times to retry a download
        [int]$Retries = 2
    )

    function _DownloadEntries {
        Param([Uri]$feedURL)
        [xml]$feed = [Net.WebClient]::new().DownloadString($feedUrl)
        $entries = $feed.feed.entry.where{ $_.properties.IsLatestVersion.'#text' -eq 'true' }

        [int]$progress = 0
        foreach ($entry in $entries) {
            $fileName = $entry.properties.id + '.' + $entry.properties.version + '.nupkg'
            [IO.FileInfo]$filePath = [IO.Path]::Join($Destination, $fileName)
            [int]$pagePercent = (++$progress) / $entries.Count * 100
            if (!$Overwrite -and $filePath.Exists) {
                Write-Progress -Activity ('{0} already downloaded' -f $fileName) `
                    -Status ('{0}% of current page complete' -f $pagePercent) `
                    -PercentComplete $pagePercent
                continue
            }
            Write-Progress -Activity ('Downloading {0}' -f $fileName) `
                -Status ('{0}% of current page complete' -f $pagePercent) `
                -PercentComplete $pagePercent

            [int]$tries = 0
            while ($tries -le $Retries) {
                try {
                    $tries++
                    [Net.WebClient]::new().DownloadFile($entry.content.src, $filePath)
                    break
                } catch [System.Net.WebException] {
                    Write-Host ("Problem downloading URL: {0}`tTry: {1}`n`tException: {2}" -f
                        $entry.content.src, $tries, $_.Exception.Message)
                }
            }
        }

        $nextLink = ([object[]]$feed.feed.link).Where{ $_.rel.startsWith('next') }
        if ($nextLink) { return [Uri]$nextLink.href }
    }

    $downloadURL = ([xml][Net.WebClient]::new().DownloadString($FeedURLBase)).service.GetAttribute('xml:base') + '/Packages'
    if (!$Destination.Exists) { [void]$Destination.Create() }
    while ($downloadURL) { $downloadURL = _DownloadEntries -feedURL $downloadURL }
}

Updated version available in my HelperFunctions module.