SharePoint Workflows Inventory Report using PowerShell

In continuation with my another post: Workflows Inventory Report for SharePoint , which was done using C# object model code, This is a PowerShell version to find all workflows deployed in the SharePoint environment to generate the workflows Inventory report.

Basically, this script iterates through all site collections-sites-List objects to fetch workflow data such as: Workflow Name, Running instances, etc.

#For SharePoint 2007 Compatibility
[void][System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")

Function global:Get-SPWebApplication($WebAppURL)
{
 return [Microsoft.SharePoint.Administration.SPWebApplication]::Lookup($WebAppURL)
}

#Function to Get the workflow inventory for the entire web application
function Get-WorkflowInventory([string] $WebAppURL)
{
    #Get the Web Application URL
    $WebApp = Get-SPWebApplication $WebAppURL  
 
    #Iterate through each site collection
    foreach ($Site in $WebApp.Sites)
          {                              
                #Loop through each site     
                foreach ($Web in $Site.AllWebs)
                   {
                    #Loop through each list
                    foreach ($List in $Web.Lists)
                      {
                         # Leave hidden Lists and Libraries
                         if($List.Hidden -eq $false)
                         {
                            foreach ($WorkflowAssociation in $List.WorkflowAssociations)
                            {
                                #Leave the "Previous Versions"
                                if($WorkflowAssociation.Name.Contains("Previous Version") -eq $false)
                                    {
                                       $data = @{
                                        "Site" = $Site.Rootweb.Title
                                        "Web" = $Web.Title
                                        "Web URL" = $Web.Url
                                        "List Name" = $List.Title
                                        "List URL" =  $Web.Url+"/"+$List.RootFolder.Url
                                        "Workflow Name" = $WorkflowAssociation.Name
                                        "Running Instances" = $WorkflowAssociation.RunningInstances
                                        }
                                        
                                        #Create a object
                                        New-Object PSObject -Property $data
                                    }
                              }
                          }                    
                    }
                     $Web.Dispose()                  
                }
                $Site.Dispose()                   
    }
} 

#call the function
Get-WorkflowInventory "http://sharepoint.crescent.com" | Export-Csv -NoTypeInformation -Path D:\Reports\WorkflowInventory.csv

write-host "Workflows Inventory report has been generated successfully!"

Tail: How to find all SharePoint designer workflows?
While the above workflow gives workflow data on all workflows, its possible to find only SharePoint designer made workflows by checking the below condition:

if( ($WorkflowAssociation -eq $null) -and ($WorkflowAssociation.InternalName.Contains("Xoml")))
              {
                  #This is a SharePoint Designer Workflow
              }