GGSTModPorter.ps1

#Requires -PSEdition Core
<## "seriously though, someone should like
    make a program or something to expedite slot porting
    particle headers and folder names and all that" ##>
if (!$args) {
    exit
}
$InputPath = Get-Item $args[0]
$ModName = $InputPath.BaseName
<## "I'm sure it'd be really simple if you knew how to use the tools, it's just
    edit a couple files with an incremental adjustment
    drop them into another program
    grab the result file, rename it, put it in folder
    repeat" ##>
$ResponseFile = New-Item -Name 'filelist.txt' -Value @"
"$InputPath\*.*" "..\..\..\*.*"
"@ -Force
$OutputDir = New-Item -ItemType Directory -Path "$ModName Paks" -Force
$Range = 11..1
# Iterate through numbers 1 to 11 and pak the mod for that slot
foreach($i in $Range) {
    $Num = '{0:D2}' -f $i
    $Colour = "Color$Num"
    ## "considering the standardised format (color01/02/03 etc), I don't think it should take too much manual direction"
    Rename-Item -Path "$ModName\RED\Content\Chara\*\Costume01\Material\Color*" -NewName $Colour
    # Stuff for editing uasset headers in hex
    $CBytes = [System.Text.Encoding]::UTF8.GetBytes('Color')
    $CHex = [Convert]::ToHexString($CBytes)
    $Target = $CHex + "(3[0-9]){2}" # Regex to match "Color" followed by two digits (in hex)
    $ColourBytes = [System.Text.Encoding]::UTF8.GetBytes($Colour)
    $ColourHex = [Convert]::ToHexString($ColourBytes) # Target colour/number (in hex)
    ## "just tell it to look in the area, grab any uasset file and change any instance of that by +1"
    $UAssets = Get-ChildItem "$ModName\RED\Content\Chara\*\Costume01\Material\$Colour" -Filter *.uasset
    foreach($UAsset in $UAssets) { # Iterate through all the uasset files and change the Color headers
        # Read uasset binary and convert it to hex
        $ByteStream = Get-Content -Path $UAsset.FullName -AsByteStream -ReadCount 0
        $UAssetHex = [Convert]::ToHexString($ByteStream)
        # Run regex on the data and convert it back to binary
        $NewAssetHex = $UAssetHex -replace $Target, $ColourHex
        $NewStream = [Convert]::FromHexString($NewAssetHex)
        # Write the updated binary back to the file
        Set-Content -Path $UAsset.FullName -Value $NewStream -AsByteStream
    }
    .\UnrealPak.exe "$InputPath.pak" "-create=$ResponseFile" -compress
    Move-Item -Path "$InputPath.pak" -Destination "$OutputDir\$ModName $Num.pak" -Force
}
Remove-Item -Path $ResponseFile
## "[...] you will eventually figure it out yourself and achieve enlightenment" -CatScrem