Removes specific Variable Sets or Script modules from all/some projects in Octopus. Octoposh Module is required

RemoveVariableSetAndModule.ps1

Import-Module Octoposh #You can get Octoposh from http://dalmirog.github.io/OctoPosh

$VariableSetName = "" #variable set NAME, not ID
$ScriptModuleName = "Test" #Script module NAME, not ID
$ProjectList = ""#leave empty if you want to check all the project in your Octopus instance. Else add names between double quotes separated by a comma

$VariableSet = Get-OctopusVariableSet -LibrarySetName $VariableSetName -ResourceOnly
$ScriptModule = Get-OctopusVariableSet -LibrarySetName $ScriptModuleName -ResourceOnly
$c = New-OctopusConnection

If([string]::IsNullOrEmpty($ProjectList)){
    $projects = Get-OctopusProject -ResourceOnly
}
else{
    $projects = Get-OctopusProject -ProjectName $ProjectList -ResourceOnly
}


Foreach($project in $projects){
    $update = $false
    Write-Output "Checking project: [$($project.name)]"
    If($project.IncludedLibraryVariableSetIds.Contains($VariableSet.OwnerId)){
        Write-Output "--Project [$($project.name)] contains Variable Set [$VariableSetName]. Removing it..."
        If($project.IncludedLibraryVariableSetIds.Remove($VariableSet.OwnerId)){
            $update = $true
        }
        
    }
    else{
        Write-Output "--Project [$($project.name)] does not contain Variable Set [$VariableSetName]."
    }
    
    if($project.IncludedLibraryVariableSetIds.Contains($ScriptModule.OwnerId)){
        Write-Output "--Project [$($project.name)] contains ScriptModule [$ScriptModuleName]. Removing it..."
        If($project.IncludedLibraryVariableSetIds.Remove($ScriptModule.OwnerId)){
            $update = $true
        }
    }
    else{
        Write-Output "--Project [$($project.name)] does not contain the Script Module [$ScriptModuleName]."
    }

    If ($update -eq $true){
        Write-Output "--Saving changes on Project [$($project.name)]"
        If(Update-OctopusResource -Resource $project -Force){
            Write-Output "--Changes on Project [$($project.name)] saved to the database"
        }
        else{
            write-output "--Something went wrong saving project [$($project.name)]. Please try to make the changes manually from the web UI"
        }
    }
}