Nuspec & Nupkg versioning

UnzipNugetPackages.ps1

Param(
    [Parameter(mandatory=$true)]
    [string]$packagesDirectory
)

$expandZipFile = 
{
    param($zipFile, $zipDestinationPath)
    Expand-Archive -path "$zipFile" -DestinationPath $zipDestinationPath -Force
}

Write-Output "Searching for .nupkg files in $packagesDirectory"

$files = gci "$packagesDirectory" -recurse | ?{ $_.Extension -eq ".nupkg" } | foreach { gci -Path $_.FullName -Recurse -include *.nupkg }

if($files) 
{
    foreach ($nugetPackageFile in $files) 
    {
		$zipFilename = $nugetPackageFile.Name -replace ".nupkg", ".zip"
        $packageName = [io.path]::GetFileNameWithoutExtension($nugetPackageFile)
        $zipDestinationDirectory = Join-Path -Path $nugetPackageFile.Directory -ChildPath $packageName
        $zipFilepath = Join-Path -Path $nugetPackageFile.Directory -ChildPath $zipFilename
        
		# Rename the nuget package from a .nupkg to .zip extension and extract the archive
		Write-Output "Renaming $($nugetPackageFile.Name) to $zipFilename" 
        Rename-Item -Path $nugetPackageFile.FullName -NewName $zipFilename
		
		if(!$(Test-Path $packagesDirectory)) { Write-Error "Could not find the packages directory at $packagesDirectory" }
        if(!$(Test-Path $zipFilepath)) { Write-Error "Could not find a zip file at $zipFilepath" }
        
        $zipFile = Get-ChildItem $zipFilepath        

		Write-Output "Starting extraction of $zipFile"
        $job = Start-Job -ScriptBlock $expandZipFile -ArgumentList $zipFile, $zipDestinationDirectory | Wait-Job

        if($job.State -ne "Completed") 
        {
            $errorReason = $job.ChildJobs[0].JobStateInfo.Reason.Message
            Write-Error "There was an issues unzipping the file at $zipFile because: $errorReason"    
        }
        else 
        {
            Write-Output "Successfully extracted the zip file to $zipDestinationDirectory"
        }
    }
}
else
{
	Write-Warning "Found no *.nupkg files."
}