moved all crates into seperate folder + related path fixes

crates/repl_wasm/src/externs_js.rs

@@ -0,0 +1,35 @@
+// wasm_bindgen procedural macro breaks this clippy rule
+// https://github.com/rustwasm/wasm-bindgen/issues/2774
+#![allow(clippy::unused_unit)]
+
+use wasm_bindgen::prelude::wasm_bindgen;
+use wasm_bindgen::JsValue;
+
+#[wasm_bindgen]
+extern "C" {
+    #[wasm_bindgen(catch)]
+    pub async fn js_create_app(wasm_module_bytes: &[u8]) -> Result<(), JsValue>;
+
+    pub fn js_run_app() -> usize;
+
+    pub fn js_get_result_and_memory(buffer_alloc_addr: *mut u8) -> usize;
+
+    #[wasm_bindgen(js_namespace = console)]
+    fn log(s: &str);
+}
+
+// To debug in the browser, start up the web REPL as per instructions in repl_www/README.md
+// and sprinkle your code with console_log!("{:?}", my_value);
+// (Or if you're running the unit tests in Wasmer, you can just use println! or dbg!)
+#[macro_export]
+macro_rules! console_log {
+    ($($t:tt)*) => (log(&format_args!($($t)*).to_string()))
+}
+
+/// Async entrypoint for the browser
+/// The browser only has an async API to generate a Wasm module from bytes
+/// wasm_bindgen manages the interaction between Rust Futures and JS Promises
+#[wasm_bindgen]
+pub async fn entrypoint_from_js(src: String) -> Result<String, String> {
+    crate::repl::entrypoint_from_js(src).await
+}