Remove-DuplicateFiles

Remove-DuplicateFiles.ps1

#
# =============================================================================
#  This script can be used to clean a folder that has 2 copies of each file.
#  There should be an original version, ie "fileA.txt" and a copy,
#  ie "fileA - Copy.txt".  You need to review / change the values of the
#  constants below.
#
#  https://gist.github.com/scottmwyant/981bdffbae8898a22a558e0c75b6cbcf
# =============================================================================
#

# Specify the target folder
$TARGET_FOLDER = "C:\Users\username\Downloads\test"

# Set the following values to either $true or $false
$DELETE_COPIES = $true
$DELETE_ORIGINALS = $false
$DRY_RUN = $true



# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
#  Define Functions
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

function Get-Name([System.IO.FileSystemInfo]$file) {
    $nameLength = $file.Name.Length - $file.Extension.Length
    return $file.Name.Substring(0, $nameLength)
}

function Remove-Files([System.IO.FileInfo[]] $files) {
    $params = @{ Force = $true; WhatIf = $DRY_RUN; }
    $files | Remove-Item @params
}

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
#  Main script
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

# Get all files from within this folder, seperate into arrays of originals and copies
$allFiles = Get-ChildItem $TARGET_FOLDER
$originals = $allFiles | Where-Object { (Get-Name $_) -NotMatch " - Copy$"}
$copies = $allFiles | Where-Object { (Get-Name $_) -Match " - Copy$"}

# Show the files that were found to be "originals"
Write-Host
Write-Host "=== ORIGINALS ($($originals.Length)) ==="
Write-Host ($originals -join "`n`r")
Write-Host

# Show the files that were found to be "copies"
Write-Host "=== COPIES ($($copies.Length)) ==="
Write-Host ($copies -join "`n`r")
Write-Host

if($DELETE_ORIGINALS){
    Write-Host "Deleting ORINGALS (Dry-Run = $DRY_RUN)"
    Write-Host
    Remove-Files $originals
}
if($DELETE_COPIES){
    Write-Host "Deleting COPIES (Dry-Run = $DRY_RUN)"
    Write-Host
    Remove-Files $copies
}

Write-Host "=== Done ==="
Write-Host