Sitecore PowerShell Extensions report to find all script and script library items containing either a ShowRule or EnableRule.

FindItemsWithRules.ps1

<#
    .SYNOPSIS
        Report all the PowerShell Script (Library) items which contain a ShowRule or EnableRule
        
    .NOTES
        Michael West
#>

$items = Get-ChildItem -Path "master:" -ID "{A3572733-5062-43E9-A447-54698BC1C637}" -Recurse | Where-Object { ($_.ShowRule -and $_.ShowRule -ne "<ruleset />") -or ($_.EnableRule -and $_.EnableRule -ne "<ruleset />") }

function Render-Rule {
    param(
        [string]$rule
    )
    
    $output = New-Object System.Web.UI.HtmlTextWriter (New-Object System.IO.StringWriter)
    $renderer = New-Object Sitecore.Shell.Applications.Rules.RulesRenderer ($rule)
    $renderer.Render($output)
    $output.InnerWriter.ToString()
}

$items | Show-ListView -Property Name, ItemPath, @{Name="ShowRule";Expression={Render-Rule -Rule $_.ShowRule}}, @{Name="EnableRule";Expression={Render-Rule -Rule $_.EnableRule}}