Add wasm package

backend/sync_wasm/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "sync-wasm"
+version = "0.1.0"
+authors = ["Andras Schmelczer <andras@schmelczer.dev>"]
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
+[dependencies]
+wasm-bindgen = "0.2.84"
+sync_lib = { path = "../sync_lib" }
+reconcile = { path = "../reconcile" }
+getrandom = { version = "0.2.3", features = ["js"] }
+
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.7", optional = true }
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.34"

backend/sync_wasm/src/lib.rs

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+mod utils;
+
+use wasm_bindgen::prelude::*;
+
+// // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+// // allocator.
+// #[cfg(feature = "wee_alloc")]
+// #[global_allocator]
+// static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+
+// #[wasm_bindgen]
+// extern "C" {
+//     fn alert(s: &str);
+// }
+
+#[wasm_bindgen]
+pub fn greet() -> String {
+    "hi".to_string()
+}

backend/sync_wasm/src/utils.rs

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+pub fn set_panic_hook() {
+    // When the `console_error_panic_hook` feature is enabled, we can call the
+    // `set_panic_hook` function at least once during initialization, and then
+    // we will get better error messages if our code ever panics.
+    //
+    // For more details see
+    // https://github.com/rustwasm/console_error_panic_hook#readme
+    #[cfg(feature = "console_error_panic_hook")]
+    console_error_panic_hook::set_once();
+}

backend/sync_wasm/tests/web.rs

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+//! Test suite for the Web and headless browsers.
+
+#![cfg(target_arch = "wasm32")]
+
+extern crate wasm_bindgen_test;
+use wasm_bindgen_test::*;
+
+wasm_bindgen_test_configure!(run_in_browser);
+
+#[wasm_bindgen_test]
+fn pass() {
+    assert_eq!(1 + 1, 2);
+}