PowerShell: Script to check feature status (enabled/disabled) before activating

Question

I am developing a script to refresh my custom features. Earlier i was just looping through the features and calling Disable-SPFeature and Enable-SPFeature on each items.

The issue is when the feature is not activated. I would like to check if feature is already activated on the scope and taking appropriate action based on the feature status.

any help, pointers

Sudhir

Answer 1

To check the state of a feature use

(Get-SPFeature -Identity <FEATURE> -ErrorAction SilentlyContinue -Farm/-WebApplication/ -Site/-Web ) -ne $null

The extra -Scope parameter will check if the feature is active at that scope.

See MSDN Get-SPFeature

If you want to activate the feature then a try/catch trap block can be used

try
{
    Enable-SPFeature -Identity <FEATURE> -Url <SCOPE> -ErrorAction Stop
}
catch [System.Management.Automation.ActionPreferenceStopException]
{
    if( !($_.Exception -is [System.Data.DuplicateNameException]) )
    {
        #Its not a "feature is already activated at scope" exception
        throw    
    }
    else
    {
        #Handle the "feature is already activated at scope" exception
    }
}

But as you can see it's not pretty.

Answer 2

You can use SharePoint object model from PowerShell to achieve this:

PS C:\Users\omlin> $featureGuid = "PUT-GUID-HERE"
PS C:\Users\omlin> $web = Get-SPWeb http://localhost
PS C:\Users\omlin> $feature = $web.Features[$featureGuid]
PS C:\Users\omlin> if ($feature -eq $null) { "does not activated" } else { "activated" }
does not activated
PS C:\Users\omlin>

Answer 3

function Check-SPFeatureActivated
{
    param([string]$Id=$(throw "-Id parameter is required!"),
            [Microsoft.SharePoint.SPFeatureScope]$Scope=$(throw "-Scope parameter is required!"),
            [string]$Url)  
    if($Scope -ne "Farm" -and [string]::IsNullOrEmpty($Url))
    {
        throw "-Url parameter is required for scopes WebApplication,Site and Web"
    }
    $feature=$null

    switch($Scope)
    {
        "Farm" { $feature=Get-SPFeature $Id -Farm }
        "WebApplication" { $feature=Get-SPFeature $Id -WebApplication $Url }
        "Site" { $feature=Get-SPFeature $Id -Site $Url }
        "Web" { $feature=Get-SPFeature $Id -Web $Url }
    }
    #return if feature found or not (activated at scope) in the pipeline
    $feature -ne $null
}

Check-SPFeatureActivated -Id 00bfea71-1e1d-4562-b56a-f05371bb0115 -Scope "Web" -Url "http://mysharepointsite/"

Answer 4

http://soreddymanjunath.blogspot.in/2014/06/powershell-script-to-check-for-feature.html

Here is the simple script to check whether feature is activated or not in all the sitecollections in a Webapplication, if the feature is not active go and enable the feature. Here we are using feature id to check for feature.

clear

Add-PSSnapin "Microsoft.SharePoint.Powershell" 

try
{
$web=Get-SPWebApplication "http://SP2013LocalDev/" | Get-spsite -Limit All | get-spweb -Limit All | % {

$bool=Get-SPFeature -Web $_ | where {$_.Id -eq "54944497-1d5b-443d-aba9-d20991ed18bb"}

                if(!$bool)
                {
                Enable-SPFeature -Identity "54944497-1d5b-443d-aba9-d20991ed18bb" -Url $_.Url
                Write-Host  "Feature Activated"
                }
      else
      {
      Write-Host "Feature is Active at" $_.Url
      }

   }

}
catch{
         $ErrorMessage = $_.Exception.Message
         Write-Host $web.Title  $ErrorMessage
    }