add build.bat for windows

README.md

@@ -25,6 +25,8 @@ ssim = core.ssimulacra2.SSIMULACRA2(ref, dist)
 ```
 
 ## Building
-``zig build -Doptimize=ReleaseFast``
+[Download](https://ziglang.org/download/) the latest zig-dev and run ``zig build -Doptimize=ReleaseFast``
 
-[Download](https://ziglang.org/download/) the latest zig-dev, or run the ``build.sh`` file if you're on Linux.
+Or run the script that downloads it for you:
+- Windows: [build.bat](/build.bat)
+- Linux: [build.sh](/build.sh)

build.bat

@@ -0,0 +1,14 @@
+@echo OFF
+:: This batch file exists to run RunWithBAT.ps1 without hassle
+
+:: Check if pwsh is in the system's PATH
+where pwsh >nul 2>nul
+if %errorlevel% equ 0 (
+    :: pwsh is in PATH, so run the script using Windows Powershell
+    pwsh -NoProfile -NoLogo -ExecutionPolicy Bypass -File powershell\RunWithBAT.ps1
+) else (
+    :: pwsh is not in PATH, run the script using PowerShell Core
+    powershell -NoProfile -NoLogo -ExecutionPolicy Bypass -File powershell\RunWithBAT.ps1
+)
+
+pause

powershell/RunWithBAT.ps1

@@ -0,0 +1,32 @@
+$jsonUrl = "https://raw.githubusercontent.com/ziglang/www.ziglang.org/master/data/releases.json"
+$jsonContent = Invoke-RestMethod -Uri $jsonUrl -Method Get
+$version = $jsonContent.master.version
+$zipUrl = $jsonContent.master.'x86_64-windows'.tarball
+
+$parentFolder = Split-Path -Path $PSScriptRoot -Parent
+$zipFilePath = Join-Path $PSScriptRoot "zig-windows-x86_64-$version.zip"
+$zigPath = Join-Path $PSScriptRoot "\zig-windows-x86_64-$version\zig.exe"
+$dllFilePath = Join-Path $parentFolder "\zig-out\lib\invert_example.dll"
+$destinationFileFolder = Join-Path $env:APPDATA "\VapourSynth\plugins64"
+New-Item -ItemType Directory -Force -Path $destinationFileFolder | Out-Null
+$destinationFilePath = Join-Path $destinationFileFolder "\invert_example.dll"
+
+if (-not (Test-Path $zipFilePath)){
+    Write-Host "Downloading zig-windows-x86_64-$version.zip..." -ForegroundColor Green
+    Invoke-WebRequest -Uri $zipUrl -OutFile $zipFilePath
+}
+
+if (-not (Test-Path $zigPath)){
+    Write-Host "Extracting zig-windows-x86_64-$version.zip..." -ForegroundColor Green
+    Expand-Archive -Path $zipFilePath -DestinationPath $PSScriptRoot -Force
+}
+
+Write-Host "Building invert_example.dll..." -ForegroundColor Green
+& $zigPath build -Doptimize=ReleaseFast
+
+if (Test-Path $dllFilePath){
+    Write-Host "Installing 'invert_example.dll' to '$destinationFilePath'" -ForegroundColor Blue
+    Copy-Item -Path $dllFilePath -Destination $destinationFilePath -Force
+} else {
+    Write-Host "No '\zig-out\lib\invert_example.dll' file, build error." -ForegroundColor Red
+}