PowerShell script that recursively scans a given directory and prints a list of all file extenions

findFileExtensions.ps1

# This PowerShell Script will recursively scan all files in the given $scanDir
# and print a list of all file extensions it finds
#
# get current directory
$curPath = Split-Path -Parent $MyInvocation.MyCommand.Path
$curDir =  Split-Path -Leaf -Path $curPath 
$scanDir = "BuildingSystems"
$scanPath = $curPath + "\" + $scanDir
$outFile = $scanPath + "\fileExtensions.txt"
# print the list of file extensions
Get-ChildItem $scanPath -recurse | Select-Object Extension | Sort-Object Extension | Get-Unique -asString | Out-File $outFile
#Read-Host "Press Enter to close"