GuildWars 2 ArcDps Update Script

UpdateArcDps.cmd

REM <#
@echo off
copy UpdateArcDps.cmd UpdateArcDps.ps1 >NUL
PowerShell.exe -ExecutionPolicy Unrestricted -NoProfile -Command "&{Set-Alias REM Write-Host; .\UpdateArcDps.ps1}"
del UpdateArcDps.ps1
exit
REM #>

#MakeCDDVDAgain (so toxic!)
#T4 Purgatory, T1 Pop

<# ---- Command Line Arguments ----
Add any commandline arguments you need here separated by a comma and encloded in single quotes
List of arguments available at https://wiki.guildwars2.com/wiki/Command_line_arguments
E.g.: $arguments = '-clientport 80','-maploadinfo'
#>

$arguments = '-autologin','-maploadinfo'

<# ---- GuildWars 2 Path ----
Modify as required. Points to the default install location
You can use environment variables here or absolute paths, e.g. E:\gw2
#>

$GW2Path = "$env:ProgramFiles\Guild Wars 2\"

<# ---- GuildWars 2 Executable Name
#This is the default executable name. Adjust as required. Do not include the .exe extension
#>

$gw = 'Gw2-64'

#Don't change these paths unless arc does
$md5Uri = 'https://www.deltaconnected.com/arcdps/x64/d3d9.dll.md5sum'
$d3d9Uri = 'https://www.deltaconnected.com/arcdps/x64/d3d9.dll'

function Start-GW2
{
    Write-Verbose 'Starting GuildWars 2...'

    if($arguments.Length -lt 1)
    {
         Start-Process -FilePath "$($GW2Path)\$($gw).exe"
    }
    else
    {
         Start-Process -FilePath "$($GW2Path)\$($gw).exe" -ArgumentList $arguments
    }
}

function Get-ArcDps
{
    Write-Verbose 'Downloading ArcDps'

    $d3d9Response = Invoke-WebRequest -Uri $d3d9Uri
    Set-Content -Path "$($GW2Path)\bin64\d3d9.dll" -Encoding Byte -Value $d3d9Response.Content

    Write-Verbose 'Completed ArcDps install'

    Start-GW2
}

function Invoke-ArcDpsCheck
{
    if((Get-Process $gw -ErrorAction 0).Count -gt 0)
    {
        Exit
    }

    $fileExists = Test-Path "$($GW2Path)\bin64\d3d9.dll"

    if($fileExists)
    {
        $currD3d9 = Get-FileHash "$($GW2Path)\bin64\d3d9.dll" -Algorithm MD5
		
		try
		{
			$md5response = Invoke-WebRequest -Uri $md5Uri
		}
        catch {
		    Write-Verbose 'Failed to download MD5 sum'
            Start-GW2
            Exit
		}

        if(!$currD3d9.Hash.Equals(($md5response.ToString().Split(" ",[System.StringSplitOptions]::RemoveEmptyEntries)[0]), 
			[System.StringComparison]::InvariantCultureIgnoreCase))
        {
            Write-Verbose 'ArcDps is out of date'
            
            Copy-Item "$($GW2Path)\bin64\d3d9.dll" -Destination "$($GW2Path)\bin64\d3d9_old.bak" -Force
            
            Get-ArcDps
        }
        else
        {
            Write-Verbose 'ArcDps is up to date'
            Start-GW2
        }
    }
    else
    {
        Get-ArcDps
    }
}

Invoke-ArcDpsCheck

Using Write-Host is bad practice in automation scripts which is why I'm using Write-Verbose. This script typically runs so quickly that Write-Host wouldn't be of much value regardless and using Start-Sleep just delays execution of an unattended script for no useful reason. Exit is a keyword of PoSh; using Stop-Process is just typing extra characters :-)

Updated with d3d9_arcdps_extras.dll.

Removed buildtemplates/extras dlls since they're no longer published.