add back powershell scripts

Install-and-Run-on-NVidia-GPUs.md

@@ -15,6 +15,159 @@ https://user-images.githubusercontent.com/98228077/223032534-c5dd5b13-a4b6-47a7-
 
 </details>
 
+<details><summary>Alternative Powershell launch scripts:</summary>
+
+**webui.ps1**
+
+```
+if ($env:PYTHON -eq "" -or $env:PYTHON -eq $null) {
+    $PYTHON = "Python.exe"
+} else {
+    $PYTHON = $env:PYTHON
+}
+
+if ($env:VENV_DIR -eq "" -or $env:VENV_DIR -eq $null) {
+    $VENV_DIR = "$PSScriptRoot\venv"
+} else {
+    $VENV_DIR = $env:VENV_DIR
+}
+
+if ($env:LAUNCH_SCRIPT -eq "" -or $env:LAUNCH_SCRIPT -eq $null) {
+    $LAUNCH_SCRIPT = "$PSScriptRoot\launch.py"
+} else {
+    $LAUNCH_SCRIPT = $env:LAUNCH_SCRIPT
+}
+
+$ERROR_REPORTING = $false
+
+mkdir tmp 2>$null
+
+function Start-Venv {
+    if ($VENV_DIR -eq '-') {
+        Skip-Venv
+    }
+
+    if (Test-Path -Path "$VENV_DIR\Scripts\$python") {
+        Activate-Venv
+    } else {
+        $PYTHON_FULLNAME = & $PYTHON -c "import sys; print(sys.executable)"
+        Write-Output "Creating venv in directory $VENV_DIR using python $PYTHON_FULLNAME"
+        Invoke-Expression "$PYTHON_FULLNAME -m venv $VENV_DIR > tmp/stdout.txt 2> tmp/stderr.txt"
+        if ($LASTEXITCODE -eq 0) {
+            Activate-Venv
+        } else {
+            Write-Output "Unable to create venv in directory $VENV_DIR"
+        }
+    }
+}
+
+function Activate-Venv {
+    $PYTHON = "$VENV_DIR\Scripts\Python.exe"
+    $ACTIVATE = "$VENV_DIR\Scripts\activate.bat"
+    Invoke-Expression "cmd.exe /c $ACTIVATE"
+    Write-Output "Venv set to $VENV_DIR."
+    if ($ACCELERATE -eq 'True') {
+        Check-Accelerate
+    } else {
+        Launch-App
+    }
+}
+
+function Skip-Venv {
+    Write-Output "Venv set to $VENV_DIR."
+    if ($ACCELERATE -eq 'True') {
+        Check-Accelerate
+    } else {
+        Launch-App
+    }
+}
+
+function Check-Accelerate {
+    Write-Output 'Checking for accelerate'
+    $ACCELERATE = "$VENV_DIR\Scripts\accelerate.exe"
+    if (Test-Path -Path $ACCELERATE) {
+        Accelerate-Launch
+    } else {
+        Launch-App
+    }
+}
+
+function Launch-App {
+    Write-Output "Launching with python"
+    Invoke-Expression "$PYTHON $LAUNCH_SCRIPT"
+    #pause
+    exit
+}
+
+function Accelerate-Launch {
+    Write-Output 'Accelerating'
+    Invoke-Expression "$ACCELERATE launch --num_cpu_threads_per_process=6 $LAUNCH_SCRIPT"
+    #pause
+    exit
+}
+
+
+try {
+    if(Get-Command $PYTHON){
+        Start-Venv
+    }
+} Catch {
+    Write-Output "Couldn't launch python."
+}
+```
+
+
+**webui-user.ps1**
+
+```
+[Environment]::SetEnvironmentVariable("PYTHON", "")
+[Environment]::SetEnvironmentVariable("GIT", "")
+[Environment]::SetEnvironmentVariable("VENV_DIR","")
+
+# Commandline arguments for webui.py, for example: [Environment]::SetEnvironmentVariable("COMMANDLINE_ARGS", "--medvram --opt-split-attention")
+[Environment]::SetEnvironmentVariable("COMMANDLINE_ARGS", "")
+
+# script to launch to start the app
+# [Environment]::SetEnvironmentVariable("LAUNCH_SCRIPT", "launch.py")
+
+# install command for torch
+# [Environment]::SetEnvironmentVariable("TORCH_COMMAND", "pip install torch==1.12.1+cu113 torchvision==0.13.1+cu113 --extra-index-url https://download.pytorch.org/whl/cu113")
+
+# Requirements file to use for stable-diffusion-webui
+# [Environment]::SetEnvironmentVariable("REQS_FILE", "requirements_versions.txt")
+
+# [Environment]::SetEnvironmentVariable("GFPGAN_PACKAGE", "")
+# [Environment]::SetEnvironmentVariable("CLIP_PACKAGE", "")
+# [Environment]::SetEnvironmentVariable("OPENCLIP_PACKAGE", "")
+
+# URL to a WHL if you wish to override default xformers windows
+# [Environment]::SetEnvironmentVariable("XFORMERS_WINDOWS_PACKAGE", "")
+
+# Uncomment and set to enable an alternate repository URL
+# [Environment]::SetEnvironmentVariable("STABLE_DIFFUSION_REPO", "")
+# [Environment]::SetEnvironmentVariable("TAMING_TRANSFORMERS_REPO", "")
+# [Environment]::SetEnvironmentVariable("K_DIFFUSION_REPO", "")
+# [Environment]::SetEnvironmentVariable("CODEFORMER_REPO", "")
+# [Environment]::SetEnvironmentVariable("BLIP_REPO", "")
+
+# Uncomment and set to enable a specific revision of a repository
+# [Environment]::SetEnvironmentVariable("STABLE_DIFFUSION_COMMIT_HASH", "")
+# [Environment]::SetEnvironmentVariable("TAMING_TRANSFORMERS_COMMIT_HASH", "")
+# [Environment]::SetEnvironmentVariable("K_DIFFUSION_COMMIT_HASH", "")
+# [Environment]::SetEnvironmentVariable("CODEFORMER_COMMIT_HASH", "")
+# [Environment]::SetEnvironmentVariable("BLIP_COMMIT_HASH", "")
+
+
+# Uncomment to enable accelerated launch
+# [Environment]::SetEnvironmentVariable("ACCELERATE", "True")
+
+$SCRIPT = "$PSScriptRoot\webui.ps1"
+Invoke-Expression "$SCRIPT"
+```
+
+</details>
+
+