check_features.ps1

function Read-Onet{
	param (
        [string] $path
    )
	asnp *sharepoint*
	
	 $file = "C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\" + "TEMPLATE\" + $path+"\xml\onet.xml";
	 write-host $file
	 if (Test-Path $file) {
		 [xml]$onet = Get-Content $($file)
		# write-host $onet
		$onet.Project.Configurations.Configuration.SiteFeatures|% {
            $feature = $_;  
			#write-host $feature.Feature.ID
			try{
				Get-SPFeature -Identity [string]$feature.Feature.ID
			}
			
			catch{
				Write-Error $_ -ErrorAction Continue 
			}
		}
		$onet.Project.Configurations.Configuration.WebFeatures|% {
            $feature = $_;  
			#write-host $feature.Feature.ID
			try{
				Get-SPFeature -Identity [string]$feature.Feature.ID
			}
			
			catch{
				Write-Error $_ -ErrorAction Continue 
			}
		}		
	 }
			
	
}
function Get-InstalledSiteDefinitions {  
    param (
        [int] $lang = 1045
    )

    if ($lang -eq $NULL) { $lang = 1045; }
	#C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\TEMPLATE\1045\XML
    $path = "C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\" + "TEMPLATE\" + $lang + "\XML\WEBTEMP*.xml";
    if (Test-Path $path) {
		write-host $path
        Select-String -Path $path -Pattern '(?:<Template[^>]+SetupPath="(?<SetupPath>[^"]+)"[^>]*>)' -AllMatches | ForEach-Object { Read-Onet -path $_.Matches[0].Groups[1].Value } | Sort-Object
    }
	
}

Get-InstalledSiteDefinitions $args[0]