Pin llvmpipe version, expand test matrix with a single enableGPU target

.github/workflows/build-tests-windows.yml

@@ -26,6 +26,12 @@ jobs:
           - StandaloneWindows64 # Build a Windows 64-bit standalone.
           - WSAPlayer # Build a UWP App
           - tvOS # Build an Apple TV XCode project
+        include:
+          # Additionally test enableGPU build for a standalone windows target
+          - projectPath: test-project
+            unityVersion: 2023.2.2f1
+            targetPlatform: StandaloneWindows64
+            enableGPU: true
 
     steps:
       ###########################

dist/platforms/windows/entrypoint.ps1

@@ -13,8 +13,10 @@ Get-Process -Name regsvr32 | ForEach-Object { Stop-Process -Id $_.Id -Force }
 # Setup Git Credentials
 . "c:\steps\set_gitcredential.ps1"
 
-# Install LLVMpipe software graphics driver
-. "c:\steps\install_llvmpipe.ps1"
+if ($env:ENABLE_GPU -ne "true") {
+  # Install LLVMpipe software graphics driver
+  . "c:\steps\install_llvmpipe.ps1"
+}
 
 # Activate Unity
 if ($env:SKIP_ACTIVATION -ne "true") {

dist/platforms/windows/install_llvmpipe.ps1

@@ -6,8 +6,8 @@ $Private:destinationPath = "$Env:UNITY_PATH\Editor\"
 $LLVMPIPE_INSTALLED = "false"
 
 try {
-    # Get the latest release info from GitHub API
-    $releaseUrl = "https://api.github.com/repos/$repo/releases/latest"
+    # Get the 25.1.0 release info from GitHub API (version fixed to decrease probability of breakage)
+    $releaseUrl = "https://api.github.com/repos/$repo/releases/25.1.0"
     $release = Invoke-RestMethod -Uri $releaseUrl -Headers @{ "User-Agent" = "PowerShell" }
 
     # Get the download URL for the zip asset