Landtrain!!!!

tools/patch-game-basevehicle.ps1

@@ -0,0 +1,80 @@
+param(
+    [string]$GameRoot = "D:\SteamLibrary\steamapps\common\ProjectZomboid"
+)
+
+$ErrorActionPreference = "Stop"
+
+$repoRoot = Split-Path -Parent $PSScriptRoot
+$toolsDir = Join-Path $repoRoot ".tools"
+$classPatchDir = Join-Path $toolsDir "classpatch"
+$buildDir = Join-Path $toolsDir "patcher-build"
+
+New-Item -ItemType Directory -Force -Path $toolsDir | Out-Null
+New-Item -ItemType Directory -Force -Path $classPatchDir | Out-Null
+New-Item -ItemType Directory -Force -Path $buildDir | Out-Null
+
+$javaExe = Join-Path $GameRoot "jre64\bin\java.exe"
+$gameJar = Join-Path $GameRoot "projectzomboid.jar"
+if (-not (Test-Path $javaExe)) { throw "java.exe not found at $javaExe" }
+if (-not (Test-Path $gameJar)) { throw "projectzomboid.jar not found at $gameJar" }
+
+$ecjJar = Join-Path $toolsDir "ecj.jar"
+$asmJar = Join-Path $toolsDir "asm.jar"
+$asmTreeJar = Join-Path $toolsDir "asm-tree.jar"
+
+if (-not (Test-Path $ecjJar)) {
+    Invoke-WebRequest -Uri "https://repo1.maven.org/maven2/org/eclipse/jdt/ecj/3.38.0/ecj-3.38.0.jar" -OutFile $ecjJar
+}
+if (-not (Test-Path $asmJar)) {
+    Invoke-WebRequest -Uri "https://repo1.maven.org/maven2/org/ow2/asm/asm/9.9/asm-9.9.jar" -OutFile $asmJar
+}
+if (-not (Test-Path $asmTreeJar)) {
+    Invoke-WebRequest -Uri "https://repo1.maven.org/maven2/org/ow2/asm/asm-tree/9.9/asm-tree-9.9.jar" -OutFile $asmTreeJar
+}
+
+$patcherSource = Join-Path $PSScriptRoot "java\BaseVehicleConstraintPatch.java"
+if (-not (Test-Path $patcherSource)) { throw "Missing patcher source: $patcherSource" }
+
+& $javaExe -jar $ecjJar -17 -cp "$asmJar;$asmTreeJar" -d $buildDir $patcherSource
+if ($LASTEXITCODE -ne 0) { throw "Failed to compile BaseVehicleConstraintPatch.java" }
+
+$inputClass = Join-Path $classPatchDir "BaseVehicle.original.class"
+$patchedClass = Join-Path $classPatchDir "BaseVehicle.patched.class"
+
+Add-Type -AssemblyName System.IO.Compression.FileSystem
+$zip = [System.IO.Compression.ZipFile]::OpenRead($gameJar)
+try {
+    $entry = $zip.GetEntry("zombie/vehicles/BaseVehicle.class")
+    if ($null -eq $entry) { throw "zombie/vehicles/BaseVehicle.class not found in $gameJar" }
+
+    $entryStream = $entry.Open()
+    $fileStream = [System.IO.File]::Create($inputClass)
+    try {
+        $entryStream.CopyTo($fileStream)
+    } finally {
+        $fileStream.Close()
+        $entryStream.Close()
+    }
+} finally {
+    $zip.Dispose()
+}
+
+& $javaExe -cp "$buildDir;$asmJar;$asmTreeJar" BaseVehicleConstraintPatch $inputClass $patchedClass
+if ($LASTEXITCODE -ne 0) { throw "BaseVehicle class patch failed" }
+
+$targetDir = Join-Path $GameRoot "zombie\vehicles"
+$targetClass = Join-Path $targetDir "BaseVehicle.class"
+$backupClass = "$targetClass.landtrain.original"
+
+New-Item -ItemType Directory -Force -Path $targetDir | Out-Null
+if (-not (Test-Path $backupClass)) {
+    if (Test-Path $targetClass) {
+        Copy-Item $targetClass $backupClass -Force
+    } else {
+        Copy-Item $inputClass $backupClass -Force
+    }
+}
+
+Copy-Item $patchedClass $targetClass -Force
+Write-Output "Patched BaseVehicle.class deployed to $targetClass"
+Write-Output "Backup stored at $backupClass"