added embedded example and conditional package flags

Author: sliemeobn

Examples/Basic/build.sh

@@ -1 +1 @@
-swift build --swift-sdk DEVELOPMENT-SNAPSHOT-2024-07-09-a-wasm32-unknown-wasi -Xswiftc -Xclang-linker -Xswiftc -mexec-model=reactor -Xlinker --export=__main_argc_argv
+swift build --swift-sdk DEVELOPMENT-SNAPSHOT-2024-09-20-a-wasm32-unknown-wasi -Xswiftc -Xclang-linker -Xswiftc -mexec-model=reactor -Xlinker --export=__main_argc_argv

Examples/Embedded/.gitignore

@@ -0,0 +1,6 @@
+.DS_Store
+/.build
+/Packages
+/*.xcodeproj
+xcuserdata/
+Package.resolved

Examples/Embedded/Package.swift

@@ -0,0 +1,20 @@
+// swift-tools-version:5.10
+
+import PackageDescription
+
+let package = Package(
+    name: "Embedded",
+    dependencies: [
+        .package(name: "JavaScriptKit", path: "../../"),
+        .package(url: "https://github.com/swifweb/EmbeddedFoundation", branch: "0.1.0")
+    ],
+    targets: [
+        .executableTarget(
+            name: "EmbeddedApp",
+            dependencies: [
+                "JavaScriptKit",
+                .product(name: "Foundation", package: "EmbeddedFoundation")
+            ]
+        )
+    ]
+)

Examples/Embedded/README.md

@@ -0,0 +1,6 @@
+# Embedded example
+
+```sh
+$ ./build.sh
+$ npx serve
+```

Examples/Embedded/Sources/EmbeddedApp/_thingsThatShouldNotBeNeeded.swift

@@ -0,0 +1,18 @@
+import JavaScriptKit
+
+// NOTE: it seems the embedded tree shaker gets rid of these exports if they are not used somewhere
+func _i_need_to_be_here_for_wasm_exports_to_work() {
+    _ = _library_features
+    _ = _call_host_function_impl
+    _ = _free_host_function_impl
+}
+
+// TODO: why do I need this? and surely this is not ideal... figure this out, or at least have this come from a C lib
+@_cdecl("strlen")
+func strlen(_ s: UnsafePointer<Int8>) -> Int {
+    var p = s
+    while p.pointee != 0 {
+        p += 1
+    }
+    return p - s
+}

Examples/Embedded/Sources/EmbeddedApp/main.swift

@@ -0,0 +1,23 @@
+import JavaScriptKit
+
+let alert = JSObject.global.alert.function!
+let document = JSObject.global.document
+
+print("Document title: \(document.title.string ?? "")")
+
+var divElement = document.createElement("div")
+divElement.innerText = "Hello, world 2"
+_ = document.body.appendChild(divElement)
+
+var buttonElement = document.createElement("button")
+buttonElement.innerText = "Alert demo"
+buttonElement.onclick = JSValue.object(JSClosure { _ in
+    divElement.innerText = "Hello, world 3"
+    return .undefined
+})
+
+_ = document.body.appendChild(buttonElement)
+
+func print(_ message: String) {
+    _ = JSObject.global.console.log(message)
+}