How do I find in which (sub)sites a WebPart/Feature is used?

Question

I need to find out on which (sub)sites a certain webpart is used. In a data sharing environment with many subsites and pages, I want to check if and where certain (third party) webparts are used. Is there a way to get a list of the locations where it is on the page?

Or more general: How do I find out where a feature is used? (For instance a site-template, when is it safe to uninstall it)

Answer 1

The best way to do get a quick view of what is being used where in a given content database is with the stsadm command enumallwebs using the addtional parameters supplied with the October 2009 Cumulative Update:

stsadm -o enumallwebs -includefeatures -includewebparts -includeeventreceivers -includesetupfiles -includecustomlistview

There's also a useful MVP article which is worth reading.

Answer 2

You could do this through PowerShell. I used this script as a basis and created the following script to list all webparts of all pages in all webs in a site collection. Take a look:

# Basis: http://www.glynblogs.com/2011/07/listing-all-web-parts-in-a-site-collection-with-powershell.html
# Modified by http://sharepoint.stackexchange.com/users/2509/tarjeieo
function EnumAllWebPartsOfSiteCollection($Url) {
    $site = new-object Microsoft.SharePoint.SPSite $Url 
    $allFiles = @()
    foreach($web in $site.AllWebs) {
        Write-Host "Processing Web:" $web.Url -NoNewLine
        if ([Microsoft.SharePoint.Publishing.PublishingWeb]::IsPublishingWeb($web)) {
            $pWeb = [Microsoft.SharePoint.Publishing.PublishingWeb]::GetPublishingWeb($web)
            $pages = $pWeb.PagesList

            foreach ($item in $pages.Items) {
                $allFiles += $item.File
            }
        }
        $pages = $null
        $pages = $web.Lists["Site Pages"]
        if ($pages) {
            foreach ($item in $pages.Items) {
                $allFiles += $item.File
            }
        }
        foreach ($file in $web.Files) {
            $allFiles += $file
        }
        $web.Dispose()
        Write-Host " - completed"
    }
    foreach ($file in $allFiles) {
        $fileUrl = $Url + $file.ServerRelativeUrl
        $manager = $file.GetLimitedWebPartManager([System.Web.UI.WebControls.Webparts.PersonalizationScope]::Shared);
        $wps = $manager.webparts
        $manager.Dispose()
        $wps | select-object @{Expression={$file.Web.Url};Label="Web URL"},@{Expression={$fileUrl};Label="Page URL"}, DisplayTitle, IsVisible, @{Expression={$_.GetType().ToString()};Label="Type"}
    }
    $site.Dispose()
}

$row = EnumAllWebPartsOfSiteCollection('http://test:1337')
$row | Out-GridView

Answer 3

For 2010, the Get-SPFeature cmdlet "Returns the SharePoint Features based on a given scope." But you still can use that enumallwebs command because PowerShell won't do all it does yet.