vrchat-dev-install.ps1

# VRChat Development Environment Installer

# If you're seeing this and you're not sure why, you might have missed the instructions.
# Here they are: https://www.github.com/Pyroglyph/vrc-dev-install

param
(
    # When this flag is set, we have already tried (and failed) to get admin rights.
    [switch] $notAdmin
)

# The self-elevator will relaunch the script with the notAdmin flag if it fails to gain admin rights.
If ($notAdmin)
{
    Write-Error "Error: Failed to acquire administrator rights.`n`nYou must be logged in as an administrator to install the VRChat Development Environment!`n"
}


# Start the script!

# This bit self-elevates the script because we need admin access to install things.
If (-NOT ([Security.Principal.WindowsPrincipal]`
    [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole(`
    [Security.Principal.WindowsBuiltInRole] "Administrator"))
{
    Write-Warning "Script launched without admin rights. Attempting to self-elevate..."
    $arguments = "& '" + $MyInvocation.MyCommand.Definition + " -notAdmin'"
    Start-Process powershell -Verb runAs -ArgumentList $arguments
    Break
}
Else
{
    # We have the right permissions: full speed ahead!


    # First, set up a custom function

    # https://blogs.msdn.microsoft.com/jasonn/2008/06/13/downloading-files-from-the-internet-in-powershell-with-progress/
    function Get-RemoteFile($url, $targetFile)
    {
        $uri = New-Object "System.Uri" "$url"
        $request = [System.Net.HttpWebRequest]::Create($uri)
        $request.set_Timeout(15000) # 15 second timeout
        $response = $request.GetResponse()
        $totalLength = [System.Math]::Floor($response.get_ContentLength() / 1024 / 1024)
        $responseStream = $response.GetResponseStream()
        $targetStream = New-Object -TypeName System.IO.FileStream -ArgumentList $targetFile, Create
        $buffer = new-object byte[] 10KB
        $count = $responseStream.Read($buffer, 0, $buffer.length)
        $downloadedBytes = $count

        while ($count -gt 0)
        {
            $targetStream.Write($buffer, 0, $count)
            $count = $responseStream.Read($buffer, 0, $buffer.length)
            $downloadedBytes = $downloadedBytes + $count
            Write-Progress -activity "Downloading file '$($url.split('/') | Select-Object -Last 1)'" -status "Downloaded ($([System.Math]::Floor($downloadedBytes/1024/1024))MB of $($totalLength)MB): " -PercentComplete ((([System.Math]::Floor($downloadedBytes / 1024 / 1024)) / $totalLength) * 100)
        }
        Write-Progress -activity "Finished downloading file '$($url.split('/') | Select-Object -Last 1)'"

        $targetStream.Flush()
        $targetStream.Close()
        $targetStream.Dispose()
        $responseStream.Dispose()
    }

    function Write-Title($text)
    {
        Write-Output("`n`n======================`n= " + $text + " =`n======================`n")
    }



    # Install Chocolatey (if it isn't already)
    If (-NOT (Get-Command choco -errorAction SilentlyContinue))
    {
        Invoke-Expression ((New-Object System.Net.WebClient).DownloadString("https://chocolatey.org/install.ps1"))
    }


    # Install Blender
    Write-Title "Installing Blender"
    $key = "Registry::HKEY_CURRENT_USER\SOFTWARE\Blender Foundation\Blender"
    if ((Get-ItemPropertyValue -Path $key -Name "installed") -eq 1)
    {
        # Blender is already installed, so we can skip this part!
        Write-Output "Blender installation already found! Skipping install..."
    }
    else
    {
        Write-Warning "`n `
There is currently no way to reliably check whether Blender is installed.`n `
You may already have it, but the script couldn't find it so it will be installed into the default location."
        choco install -y blender
    }


    # Install Unity
    # (I would have used Chocolatey again but they don't have the right version of Unity)
    Write-Title " Installing Unity "
    # Check if Unity is already installed...
    $key = "Registry::HKEY_CURRENT_USER\SOFTWARE\Unity Technologies\Installer\Unity"
    if ((Get-ItemPropertyValue -Path $key -Name "Version") -eq "5.6.3p1")
    {
        # Unity is already installed, so we can skip this part!
        Write-Output "Unity installation already found! Skipping install..."
    }
    else
    {
        Write-Output "Downloading Unity... (this might take a while)"
        Get-RemoteFile "https://beta.unity3d.com/download/9c92e827232b/Windows64EditorInstaller/UnitySetup64-5.6.3p1.exe" "$env:TEMP/UnitySetup64-5.6.3p1.exe"
        Write-Output "Installing..."
        & "$env:TEMP/UnitySetup64-5.6.3p1.exe" /S
        Remove-Item "$env:TEMP/UnitySetup64-5.6.3p1.exe"
    }


    # Download and install the latest VRCSDK
    # (most of this is just testing for and removing old files)
    Write-Title "Downloading VRCSDK"
    $UnityProjectsPath = [Environment]::GetFolderPath("MyDocuments") + "/Unity Projects"

    If (Test-Path -Path "$env:TEMP/VRCSDK.unityPackage")
    {
        Remove-Item -Path "$env:TEMP/VRCSDK.unityPackage"
    }
    
    Write-Output "Downloading..."
    Get-RemoteFile "https://www.vrchat.net/download/sdk" "$env:TEMP/VRCSDK.unityPackage"

    If (-NOT (Test-Path -Path $UnityProjectsPath))
    {
        New-Item -Path $UnityProjectsPath -ItemType Directory
    }

    If (Test-Path -Path "$UnityProjectsPath/VRCSDK.unityPackage")
    {
        Remove-Item -Path "$UnityProjectsPath/VRCSDK.unityPackage"
    }

    Move-Item -Path "$env:TEMP/VRCSDK.unityPackage" -Destination "$UnityProjectsPath/VRCSDK.unityPackage"


    # We're done!
    Write-Output "`n`nFinished successfully!"
}