Cleanup Nuget Cache

CleanupNugetCache.ps1

# cleanups up the .nuget\packages directory
# * Keeps anything added within 120 days
# * Keeps the most recently used of every package

$maxAge = (Get-Date).AddDays(-120);
$deleted = 0;
$deletedMb = 0;
Get-ChildItem -Directory -Path ([IO.Path]::Combine($HOME, ".nuget", "packages")) | ForEach-Object { 
    Get-ChildItem -Directory -Path $_.Fullname | Sort-Object -Property LastWriteTime -Descending | ForEach-Object {$i=0} {
        $sizeMb = [Math]::Round((Get-ChildItem -Path $_.FullName -Recurse | Measure-Object -Sum Length).Sum / 1MB, 2)
        if ($i++ -eq 0) {
            Write-Host -ForegroundColor DarkGreen "$($_.FullName) skipped (first) $sizeMb MB"; 
        } elseif ($_.LastWriteTime -gt $maxAge) { 
            Write-Host -ForegroundColor DarkCyan "$($_.FullName) skipped (last write $($_.LastWriteTime)) $sizeMb MB";
        } else {
            Write-Host -ForegroundColor DarkRed "$($_.FullName) deleted (last write $($_.LastWriteTime)) $sizeMb MB" ;
            Remove-Item $_.FullName -Recurse
            $deletedMb += $sizeMb;
            $deleted += 1;
        }
    }
}
Write-Host -ForegroundColor Red "Deleted $deleted package versions, $deletedMb MB";