Emscripten CI (#1868)

* Refactor non working JS tests with feature-based checks.

* Add Emscripten testing to CI.

* Compile Emscripten tests as C++14.

* Update Emscripten generated files naming scheme.

* Disable Emscripten property generation.

* Emscripten testing fixes.

* Add CMake to CI.

Author: tritao

.github/workflows/main.yml

@@ -22,12 +22,24 @@ jobs:
       PLATFORM: ${{ matrix.config.platform }}
       DOTNET_NOLOGO: true
       DOTNET_CLI_TELEMETRY_OPTOUT: true
+      EMSCRIPTEN_VERSION: 3.1.65
 
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: '0'
 
+      - name: Setup emsdk
+        uses: mymindstorm/setup-emsdk@v11
+        with:
+          version: ${{ env.EMSCRIPTEN_VERSION }}
+          actions-cache-folder: emsdk-cache-${{ runner.os }}
+
+      - name: Setup cmake
+        uses: jwlawson/actions-setup-cmake@v2
+        with:
+          cmake-version: '3.30.x'
+
       - name: Install nbgv
         if: startsWith(matrix.config.os, 'macos')
         run: |
@@ -69,6 +81,11 @@ jobs:
         run: tests/quickjs/test.sh
         if: runner.os != 'Windows'
 
+      - name: Test (Emscripten)
+        shell: bash
+        run: tests/emscripten/test.sh
+        if: runner.os != 'Windows'
+
       - name: Pack
         shell: bash
         run: build/build.sh prepack -platform $PLATFORM

src/Generator/Generators/Emscripten/EmscriptenGenerator.cs

@@ -13,6 +13,16 @@ public class EmscriptenGenerator : CppGenerator
     {
         public EmscriptenGenerator(BindingContext context) : base(context)
         {
+            if (context.Options.GenerateName == null)
+            {
+                context.Options.GenerateName = (unit) =>
+                {
+                    if (unit.FileName == "premake5.lua")
+                        return unit.FileNameWithoutExtension;
+                    else
+                        return $"{unit.Module.LibraryName}_embind_{unit.FileNameWithoutExtension}";
+                };
+            }
         }
 
         public override List<GeneratorOutput> Generate()
@@ -59,7 +69,7 @@ public override GeneratorOutput GenerateModule(Module module)
             {
                 TranslationUnit = new TranslationUnit
                 {
-                    FilePath = $"{module.LibraryName}_embind_module.cpp",
+                    FilePath = $"__Module.cpp",
                     Module = module
                 },
                 Outputs = new List<CodeGenerator> { moduleGen }

src/Generator/Generators/Emscripten/EmscriptenSources.cs

@@ -117,6 +117,11 @@ public override void VisitClassConstructors(IEnumerable<Method> ctors)
             }
         }
 
+        public override bool VisitProperty(Property property)
+        {
+            return true;
+        }
+
         public override bool VisitMethodDecl(Method method)
         {
             Indent();

tests/emscripten/premake5.lua

@@ -4,6 +4,7 @@ workspace "emscripten"
     location "gen"
     symbols "On"
     optimize "Off"
+    cppdialect "C++14"
 
     project "test"
         kind "SharedLib"

tests/emscripten/test.mjs

@@ -1,20 +1,25 @@
 import wasmModule from "./gen/bin/debug/libtest.mjs";
 import { eq, ascii, floateq } from "./utils.mjs"
 
-const test = await wasmModule({
-    onRuntimeInitialized() {
+const test = await wasmModule({ onRuntimeInitialized() {} });
 
-    }
-});
+const features = {
+    // https://github.com/WebAssembly/proposals/issues/7
+    // https://github.com/emscripten-core/emscripten/issues/11140
+    supportsInt64: false,
+    supportsNull: false,
+}
 
 function builtins() {
     eq(test.ReturnsVoid(), undefined)
 
     eq(test.ReturnsBool(), true)
     eq(test.PassAndReturnsBool(false), false)
 
-    eq(test.ReturnsNullptr(), null)
-    eq(test.PassAndReturnsNullptr(null), null)
+    if (features.supportsNull) {
+        eq(test.ReturnsNullptr(), null)
+        eq(test.PassAndReturnsNullptr(null), null)
+    }
 
     eq(test.ReturnsChar(), ascii('a'));
     eq(test.ReturnsSChar(), ascii('a'));
@@ -41,11 +46,10 @@ function builtins() {
     eq(test.ReturnsInt32(), -5);
     eq(test.ReturnsUInt32(), 5);
 
-    // TODO: 
-    // https://github.com/WebAssembly/proposals/issues/7
-    // https://github.com/emscripten-core/emscripten/issues/11140
-    //eq(test.ReturnsInt64(), -5n);
-    //eq(test.ReturnsUInt64(), 5n);
+    if (features.supportsInt64) {
+        eq(test.ReturnsInt64(), -5n);
+        eq(test.ReturnsUInt64(), 5n);
+    }
 
     const int8 = { min: -(2 ** 7), max: (2 ** 7) - 1 };
     eq(test.PassAndReturnsInt8(int8.min), int8.min);
@@ -71,13 +75,15 @@ function builtins() {
     eq(test.PassAndReturnsUInt32(uint32.min), uint32.min);
     eq(test.PassAndReturnsUInt32(uint32.max), uint32.max);
 
-    //const int64 = { min: BigInt(2 ** 63) * -1n, max: BigInt(2 ** 63) - 1n };
-    //eq(test.PassAndReturnsInt64(int64.min), int64.min);
-    //eq(test.PassAndReturnsInt64(int64.max), int64.max);
+    if (features.supportsInt64) {
+        const int64 = { min: BigInt(2 ** 63) * -1n, max: BigInt(2 ** 63) - 1n };
+        eq(test.PassAndReturnsInt64(int64.min), int64.min);
+        eq(test.PassAndReturnsInt64(int64.max), int64.max)
 
-    //const uint64 = { min: BigInt(0), max: BigInt(2 ** 64) - 1n };
-    //eq(test.PassAndReturnsUInt64(uint64.min), uint64.min);
-    //eq(test.PassAndReturnsUInt64(uint64.max), uint64.max);
+        const uint64 = { min: BigInt(0), max: BigInt(2 ** 64) - 1n };
+        eq(test.PassAndReturnsUInt64(uint64.min), uint64.min);
+        eq(test.PassAndReturnsUInt64(uint64.max), uint64.max);
+    }
 }
 
 function enums() {
@@ -94,7 +100,7 @@ function classes() {
     eq(typeof (c), "object")
     eq(c.ReturnsVoid(), undefined)
     eq(c.ReturnsInt(), 0)
-    eq(c.PassAndReturnsClassPtr(null), null)
+    //eq(c.PassAndReturnsClassPtr(null), null)
 
     var c1 = new test.ClassWithSingleInheritance();
     eq(c1.__proto__.constructor.name, 'ClassWithSingleInheritance')
@@ -105,10 +111,9 @@ function classes() {
 
     var classWithField = new test.ClassWithField();
     eq(classWithField.ReturnsField(), 10);
-    eq(classWithField.Field, 10);
+    //eq(classWithField.Field, 10);
 }
 
-
 builtins();
 enums();
-classes();
+classes();

tests/emscripten/test.sh

@@ -5,7 +5,16 @@ rootdir="$dir/../.."
 dotnet_configuration=Release
 configuration=debug
 platform=x64
-jsinterp=node
+jsinterp=$(which node)
+
+for arg in "$@"; do
+    case $arg in
+        --with-node=*)
+        jsinterp="${arg#*=}"
+        shift
+        ;;
+    esac
+done
 
 if [ "$CI" = "true" ]; then
     red=""