Add xsystem35-sdl2 and system3-sdl2 as submodules

.github/workflows/build.yml

@@ -1,14 +1,36 @@
 name: Build
 on: push
 
+env:
+  EM_VERSION: 3.1.61
+  EM_CACHE_FOLDER: 'emsdk-cache'
+
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
 
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Setup cache
+      id: cache-system-libraries
+      uses: actions/cache@v4
+      with:
+        path: ${{env.EM_CACHE_FOLDER}}
+        key: ${{env.EM_VERSION}}-${{ runner.os }}
+
+    - name: Setup Emscripten toolchain
+      uses: mymindstorm/setup-emsdk@v14
+      with:
+        version: ${{env.EM_VERSION}}
+        actions-cache-folder: ${{env.EM_CACHE_FOLDER}}
+
+    - name: Build Wasm
+      run: ./build-wasm.sh
 
-    - name: Build
+    - name: Build Shell
       run: |
         npm install
         npm run type

.gitignore

@@ -1,4 +1,6 @@
 node_modules/
+dist/system3.*
+dist/xsystem35.*
 dist/shell.js*
 dist/archiveworker.js*
 dist/fdimage.js*

.gitmodules

@@ -0,0 +1,6 @@
+[submodule "xsystem35-sdl2"]
+	path = xsystem35-sdl2
+	url = https://github.com/kichikuou/xsystem35-sdl2.git
+[submodule "system3-sdl2"]
+	path = system3-sdl2
+	url = https://github.com/kichikuou/system3-sdl2.git

build-wasm.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+set -e
+
+if [ ! -f "xsystem35-sdl2/CMakeLists.txt" ] || [ ! -f "system3-sdl2/CMakeLists.txt" ]; then
+    git submodule update --init --recursive
+fi
+
+if [ ! -d "xsystem35-sdl2/out" ]; then
+    emcmake cmake -DCMAKE_BUILD_TYPE=MinSizeRel -DCMAKE_COMPILE_WARNING_AS_ERROR=YES -S xsystem35-sdl2 -B xsystem35-sdl2/out
+fi
+cmake --build xsystem35-sdl2/out && cp xsystem35-sdl2/out/src/xsystem35.* dist/
+
+if [ ! -d "system3-sdl2/out" ]; then
+    emcmake cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_COMPILE_WARNING_AS_ERROR=YES -S system3-sdl2 -B system3-sdl2/out
+fi
+cmake --build system3-sdl2/out && cp system3-sdl2/out/system3.* dist/