Finding PowerShell Functions

PowerShell 3.0 and later

To quickly scan your PowerShell script repository and find all files that have a given function in them, try this filter:

filter Find-Function
{
   $path = $_.FullName
   $lastwrite = $_.LastWriteTime
   $text = Get-Content -Path $path
   
   if ($text.Length -gt 0)
   {
      
      $token = $null
      $errors = $null
      $ast = [System.Management.Automation.Language.Parser]::ParseInput($text, [ref] $token, [ref] $errors)
      $ast.FindAll({ $args[0] -is [System.Management.Automation.Language.FunctionDefinitionAst] }, $true) |
      Select-Object -Property Name, Path, LastWriteTime |
      ForEach-Object {
         $_.Path = $path
         $_.LastWriteTime = $lastwrite
         $_
      }
   }
} 

And this is how you’d scan your user profile for all PowerShell scripts that define functions:

PS> dir $home -Filter *.ps1 -Recurse -Exclude *.ps1xml | Find-Function 
Name                       Path                       LastWriteTime            
----                       ----                       -------------            
Inject-LogonCredentials    C:\Users\Tobias\Desktop... 06.01.2014 02:43:00      
Test-Command               C:\Users\Tobias\Desktop... 06.03.2014 10:17:02      
Test                       C:\Users\Tobias\Desktop... 30.01.2014 09:32:20      
Get-WebPictureOriginal     C:\Users\Tobias\Desktop... 11.12.2013 11:37:53      
Get-ConnectionString       C:\Users\Tobias\Documen... 23.05.2014 10:49:09      
Convert-SID2User           C:\Users\Tobias\Documen... 23.05.2014 15:33:06      
Lock-Screen                C:\Users\Tobias\Documen... 19.03.2014 12:51:54      
Show-OpenFileDialog        C:\Users\Tobias\Documen... 16.05.2014 13:42:16      
Show-UniversalData         C:\Users\Tobias\Documen... 16.05.2014 13:23:20      
Start-TimebombMemory       C:\Users\Tobias\Documen... 23.05.2014 09:12:28      
Stop-TimebombMemory        C:\Users\Tobias\Documen... 23.05.2014 09:12:28      
(...)

Simply pipe the result to Out-GridView to get the full and uncut information.

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