[AppVeyor] Initial commit.

appveyor.yml

@@ -0,0 +1,32 @@
+# AppVeyor CI configuration
+
+environment:
+  matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      PREMAKE_ACTION: vs2019
+
+configuration:
+  - Debug
+  - Release
+
+platform: Win32
+
+install:
+  - ps: |
+      Write-Host "Updating version information..." -ForegroundColor Cyan
+
+      Update-AppveyorBuild -Version $(& tools/premake5.exe version | select -Last 1)
+  - git submodule update --init --recursive
+  - ps: |
+      Write-Host "Generating project files with premake..." -ForegroundColor Cyan
+      & "./tools/premake5.exe" $env:PREMAKE_ACTION
+      Write-Host "Generated" -ForegroundColor Green
+
+build:
+  project: build/iw4x.sln
+  parallel: true
+  verbosity: minimal
+
+artifacts:
+  - path: build/bin/**/*.dll
+  - path: build/bin/**/*.pdb