Move from .bat to .ps1 for build script, improve Qt finding

appveyor.yml

@@ -1,10 +1,7 @@
 image: Visual Studio 2022
 
-on_finish:
-  - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
-
 build_script:
-  - cmd: .\build_script.bat
+  - pwsh: .\build_script.ps1
 
 after_build:
   - ps: py .\zip_script.py

build_script.ps1

@@ -0,0 +1,61 @@
+function SetupMSVC {
+    param (
+        [PSDefaultValue(Help = "x64")]
+        [string]$Arch = "x64",
+        [PSDefaultValue(Help = "false")]
+        [switch]$Pre
+    )
+
+    $moduleAlreadyLoaded = Get-Module Microsoft.VisualStudio.DevShell
+    if ($moduleAlreadyLoaded) {
+        Write-Error "Module with the same name already loaded, cannot load another one because there will be assemblies conflicts"
+        return
+    }
+    $assemblyPresent = [System.AppDomain]::CurrentDomain.GetAssemblies() | Where-Object { $_.FullName -like '*Microsoft.VisualStudio.DevShell*' }
+    if ($assemblyPresent) {
+        Write-Error "Assembly with the same name already loaded, cannot load another one because there will be assemblies conflicts"
+        return
+    }
+
+    if ($Pre) {
+        $vsPath = &"${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe" -prerelease -latest -products * -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 -property installationpath
+    }
+    else {
+        $vsPath = &"${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe" -latest -products * -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 -property installationpath
+    }
+    $commonLocation = "$vsPath\Common7\Tools\Microsoft.VisualStudio.DevShell.dll"
+    if (Test-Path $commonLocation) {
+        $dllPath = $commonLocation
+    }
+    else {
+        $dllPath = (Get-ChildItem $vsPath -Recurse -File -Filter Microsoft.VisualStudio.DevShell.dll).FullName
+    }
+    Import-Module -Force $dllPath
+    Enter-VsDevShell -VsInstallPath $vsPath -SkipAutomaticLocation -DevCmdArguments "-arch=$Arch"
+}
+
+function FindQt6 {
+    $versions = Get-ChildItem -Path "C:\Qt" -Directory -Filter "6.*" -Attributes !ReparsePoint | Select-Object -ExpandProperty Name | Sort-Object -Descending
+    if ($versions.Length -eq 0) {
+        Write-Error "No Qt6 installation found"
+        return
+    }
+    $qtPath = "C:\Qt\$($versions[0])\msvc2019_64"
+    if (Test-Path $qtPath) {
+        return $qtPath
+    }
+    else {
+        Write-Error "No Qt6 installation found"
+        return
+    }
+}
+
+SetupMSVC
+$qtPath = FindQt6
+if (!$qtPath) {
+    return
+}
+Write-Output "Using Qt6 from $qtPath"
+cmake.exe -S . -B build -GNinja -DCMAKE_BUILD_TYPE:String=Release -DCMAKE_PREFIX_PATH:STRING=$qtPath -DCMAKE_C_COMPILER:STRING=cl.exe -DCMAKE_CXX_COMPILER:STRING=cl.exe
+Set-Location build
+cmake.exe --build . --target all