Parsing a powershell script using the AST

Find Commands in a script using AST.ps1

using namespace System.Management.Automation
using namespace System.Management.Automation.Language

$Tokens = $null
$AstErrors = $Null
$doc = [Parser]::ParseFile(
    <# fileName: #> $file,
    <# tokens  : #> [ref] $tokens,
    <# errors  : #> [ref] $AstErrors )

$query = $doc.FindAll({ 
   param( [Ast]$Ast )
   $Ast -is [CommandAst]
}, <# recurse #> $true  ) 

$query | Select * | Out-GridView