I was looking for a function to get the script directory in a PowerShell script and I didn’t found exaclty found what I was looking for.
I found some scripts on the net that works on PowerShell 1.0 or 2.0 and with Powershell host or PrimalScript 2009 Host (yes I’m using PrimalScript everyday).
So I tooked some code form others and added some of my stuff and here what I came up with :
function get-scriptdirectory {
# .SYNOPSIS
# Return the current script directory path, compatible with PrimalScript 2009
# Equivalent to VBscript fso.GetParentFolderName(WScript.ScriptFullName)
# Requires PowerShell 2.0
#
# .DESCRIPTION
# Author : Jean-Pierre.Paradis@fsa.ulaval.ca
# Date : March 31, 2010
# Version : 1.01
#
# .LINK
# http://blog.sapien.com/index.php/2009/09/02/powershell-hosting-and-myinvocation/
if (Test-Path variable:\hostinvocation)
{$FullPath=$hostinvocation.MyCommand.Path}
Else {
$FullPath=(get-variable myinvocation -scope script).value.Mycommand.Definition }
if (Test-Path $FullPath) {
return (Split-Path $FullPath)
}
Else {
$FullPath=(Get-Location).path
Write-Warning ("Get-ScriptDirectory: Powershell Host <" + $Host.name + "> may not be compatible with this function, the current directory <" + $FullPath + "> will be used.")
return $FullPath
}
}
My function will work on PowerShell command line, PowerShell ISE or PrimalScript 2009. You will, however need PowerShell 2.0.
It is also compatible with a ‘Set-StrictMode -Version 2.0’ (you the thing most best practices guide told you to use).
Update (march 31, 2010) :
Looks like there is currently no way to get the script directory from PowerGUIScriptEditorHost, so I’ve modified my script to return the current directory (and a warning) instead of throwing an error.