How can I get the file system location of a PowerShell script?

PowerShell 3+

The path of a running scripts is:

$PSCommandPath

Its directory is:

$PSScriptRoot

PowerShell 2

The path of a running scripts is:

$MyInvocation.MyCommand.Path

Its directory is:

$PSScriptRoot = Split-Path $MyInvocation.MyCommand.Path -Parent

Roman Kuzmin answered the question imho. I'll just add that if you import a module (via Import-Module), you can access $PsScriptRoot automatic variable inside the module -- that will tell you where the module is located.

For what it's worth, I found that this works for me on PowerShell V5 in scripts and in PowerShell ISE:

try {    $scriptPath = $PSScriptRoot    if (!$scriptPath)    {        if ($psISE)        {            $scriptPath = Split-Path -Parent -Path $psISE.CurrentFile.FullPath        } else {            Write-Host -ForegroundColor Red "Cannot resolve script file's path"            exit 1        }    }} catch {    Write-Host -ForegroundColor Red "Caught Exception: $($Error[0].Exception.Message)"    exit 2}Write-Host "Path: $scriptPath"

HTH

P.S. Included full error handling. Adjust to your needs, accordingly.