add "This Week in Rust and WebAssembly 10"

Author: fitzgen

_posts/2019-02-13-this-week-in-rust-and-wasm-010.md

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+---
+title:  "This Week in Rust and WebAssembly 10"
+---
+
+Hello and welcome to another issue of *This Week in Rust and WebAssembly*!
+
+[Rust](https://rust-lang.org) is a systems language pursuing the trifecta:
+safety, concurrency, and speed.
+
+[WebAssembly](http://webassembly.org) is a stack-based virtual machine and
+instruction set. It is fast, safe, portable, and part of the open Web
+platform. By compiling to WebAssembly, we can run Rust code on the Web!
+
+This is a weekly summary of Rust and WebAssembly's progress and community.
+
+Did we miss something? Tweet to us at [@rustwasm](https://twitter.com/rustwasm)
+or [send us a pull request](https://github.com/rustwasm/rustwasm.github.io).
+
+## News and Blog Posts from Around the Web
+
+*Want to make sure something ends up on this list next time we publish an issue?
+[Leave a comment on this issue.](https://github.com/rustwasm/team/issues/79)*
+
+* [**Reflecting on Rust and WebAssembly in
+  2018**](https://rustwasm.github.io/2018/12/06/reflecting-on-rust-and-wasm-in-2018.html)
+
+* [`wasm-bindgen` — how does it
+  work?!](http://fitzgeraldnick.com/2018/12/02/wasm-bindgen-how-does-it-work.html)
+
+* [Edge programming with Rust and WebAssembly with
+  Terrarium](https://www.fastly.com/blog/edge-programming-rust-web-assembly)
+
+* [Embedding WebAssembly in your Rust Application with
+  wasmer.io](https://medium.com/wasmer/executing-webassembly-in-your-rust-application-d5cd32e8ce46)
+
+* [The `console_log` crate](https://github.com/iamcodemaker/console_log) is a
+  backend for [the `log` facade](https://crates.io/crates/log) that pipes logged
+  messages to the browser's console.
+
+* [Zemeroth](https://ozkriff.itch.io/zemeroth) is a turn-based hexagonal
+  tactical game written in Rust and WebAssembly.
+
+* [An example implementation of react/redux style UI development in Rust with
+  `percy`](https://github.com/richardanaya/virtual-dom-rs-counter)
+
+* [Seed](https://github.com/David-OConnor/seed) is a new Wasm framework for Web
+  apps.
+
+* [`sendilkumarn/generator-wasm-app`](https://github.com/sendilkumarn/generator-wasm-app)
+  is a a Wasm app generator for [Yeoman](https://yeoman.io/).
+
+* [`edvorg/rustsmith`](https://github.com/edvorg/rustmith) is a Rocksmith clone
+  for the Web platform built with Rust and WebAssembly.
+
+### `#RustWasm2019` Posts
+
+* [Rust WebAssembly 2019](https://blog.ryanlevick.com/posts/rust-wasm-2019/) by
+  Ryan Levick
+
+* [My Rust 2019 Dream: Dominate the
+  Web](https://www.reddit.com/r/rust/comments/aac8zk/my_rust_2019_dream_dominate_the_web/)
+  by richardanaya
+
+* [Wasm 2019](https://blog.yoshuawuyts.com/wasm-2019/) by Yoshua Wuyts
+
+* [Rust and WebAssembly in
+  2019](http://fitzgeraldnick.com/2018/12/14/rust-and-webassembly-in-2019.html)
+  by Nick Fitzgerald
+
+* [Non-Web Embeddings for Rust Wasm
+  2019](https://medium.com/wasmer/non-web-embeddings-for-rust-wasm-2019-7b290e94f81d)
+  by Brandon Fish and wasmer.io
+
+## Wasm at the 2019 Rust All Hands
+
+The 2019 Rust All Hands meetup was in Berlin on February 4<sup>th</sup> through
+8<sup>th</sup>. @ag_dubs, @alexcrichton, @fitzgen, and @yoshuawuyts from the
+Rust and WebAssembly working group all made it out to discuss some Wasm-related
+topics and plan for 2019.
+
+We talked about:
+
+* [The road to `wasm-pack`
+  1.0.](https://gist.github.com/fitzgen/23a62ebbd67574b9f6f72e5ac8eaeb67#file-road-to-wasm-pack-1-0-md)
+  This meeting was about trying to pin down what we want to ship as part of a
+  `wasm-pack` 1.0 release, as well as crystallize `wasm-pack`'s ideal UX.
+
+* [A modular toolkit for
+  Wasm.](https://gist.github.com/fitzgen/23a62ebbd67574b9f6f72e5ac8eaeb67#file-modular-toolkit-md)
+  There's been a lot of talk in `#RustWasm2019` posts and the 2019 roadmap RFC
+  about building a modular toolkit for Wasm apps and libraries. This meeting was
+  trying to dig a bit more into the details of what that entails. And naming, of
+  course.
+
+* [`cargo` build tasks, hooks, and/or `post-build.rs` for
+  Wasm.](https://gist.github.com/fitzgen/23a62ebbd67574b9f6f72e5ac8eaeb67#file-cargo-build-hooks-for-wasm-md)
+  Long-term (likely on the timeline of a couple years) we would like the
+  experience of building Rust and Wasm projects to be *exactly* the same as
+  building normal Rust projects: just `cargo build` and that's it. But there is
+  a bunch of stuff that needs to happen for Wasm after `rustc` emits a Wasm
+  binary, such as generate JS bindings or run `wasm-opt`. This meeting was about
+  how to add some sort of generic build hooks to `cargo` and turn `wasm-pack`
+  into an implementation of those generic hooks specifically targeted for Wasm
+  development.
+
+* [Multithreading Wasm and
+  `rayon`.](https://gist.github.com/fitzgen/23a62ebbd67574b9f6f72e5ac8eaeb67#file-wasm-multithreading-and-rayon-md)
+  This meeting was about how we take our experimental Wasm multithreading
+  support and turn it into a reliable library that can serve as the foundation
+  for multithreading on the Web. @CUViper from the `rayon` team also joined, and
+  we made a plan for how to get `rayon` working in Wasm.
+
+## Updates from [`rustwasm/*`](https://github.com/rustwasm)
+
+### RFCs
+
+#### New RFCs
+
+* [**2019 Roadmap**](https://github.com/rustwasm/rfcs/pull/7) &mdash; this is
+  your chance to help shape our goals for the year!
+
+* [Add support for local JS snippets in `wasm-bindgen`](https://github.com/rustwasm/rfcs/pull/6)
+
+#### Merged RFCs
+
+None.
+
+### Book
+
+* @DebugSteven [wrote a testing
+  section](https://github.com/rustwasm/book/pull/137) for the Game of Life
+  tutorial!
+
+### Twiggy🌱
+
+* [**We released Twiggy🌱 0.4.0!
+  🎉**](https://github.com/rustwasm/twiggy/blob/master/CHANGELOG.md#040)
+
+* @brson fixed a bug where we would [attempt to demangle things that were not
+  C++](https://github.com/rustwasm/twiggy/pull/232) symbols as if they were C++
+  symbols.
+
+### `walrus`
+
+* [`walrus` is a new library crate for writing Wasm-to-Wasm
+  transformations.](https://github.com/rustwasm/walrus) It will eventually (but
+  doesn't yet) preserve DWARF debug info for the Wasm across your
+  transformations.
+
+* @alexcrichton got `walrus` [round-tripping all the Wasm spec
+  tests](https://github.com/rustwasm/walrus/pull/24) correctly.
+
+* @fitzgen [wrote a simple Wasm
+  fuzzer](https://github.com/rustwasm/walrus/pull/45), immediately found a bug,
+  and whipped up a fix.
+
+* @alexcrichton refactored instruction parsing to [avoid
+  recursion](https://github.com/rustwasm/walrus/pull/48). This means that we
+  don't blow the stack in debug builds or when given malicious input.
+
+* We just released `walrus` 0.1.0 on crates.io &mdash; expect more exciting
+  things from `walrus` in the future :)
+
+### `wasm-bindgen`
+
+* [**We released `wasm-bindgen` 0.2.29 through 0.2.36!
+  🎉**](https://github.com/rustwasm/wasm-bindgen/blob/master/CHANGELOG.md#0236)
+
+* @derekdreery [improved the `std::fmt::Debug` output for
+  `JsValue`](https://github.com/rustwasm/wasm-bindgen/pull/1161) so that it
+  includes object properties and their values, instead of just `[object
+  Object]`.
+
+* @fitzgen made the `wasm-bindgen-test` testing infrastructure [capture more
+  `console` logging methods' (`warn`, `info`, etc)
+  output](https://github.com/rustwasm/wasm-bindgen/pull/1184) for displaying in
+  `stdout`.
+
+* @T5uku5hi [added `#[allow(clippy::all)]` to `wasm-bindgen`'s macro-generated
+  code,](https://github.com/rustwasm/wasm-bindgen/pull/1207) so that running
+  clippy on crates that use `wasm-bindgen` isn't so noisy.
+
+* @alexcrichton added support for [passing `Option<MyEnum>` back and
+  forth](https://github.com/rustwasm/wasm-bindgen/pull/1214) between Wasm and JS
+  if `MyEnum` has the `#[wasm_bindgen]` attribute.
+
+* @fitzgen [added the `UnwrapThrowExt`
+  trait](https://github.com/rustwasm/wasm-bindgen/pull/1219) to `wasm-bindgen`'s
+  prelude. This extension trait adds `unwrap_throw` and `expect_throw` methods
+  to `Option<T>` and `Result<T, E>` that have the same behavior as regular
+  `unwrap` and `expect` except they throw a JS error on failure instead of
+  panicking. This is morally the same, but ends up avoiding the `std::panicking`
+  and `std::fmt` infrastructure, resulting in smaller code sizes.
+
+* @alexcrichton [migrated `wasm-bindgen`'s post-`rustc` Wasm
+  transformations](https://github.com/rustwasm/wasm-bindgen/pull/1237) to the
+  new `walrus` crate! This paves the way for maintaining DWARF debug info
+  through `wasm-bindgen`.
+
+* @fitzgen made the `wasm-bindgen-test` runtime capture logged messages in tests
+  [via `textContent` instead of
+  `innerHTML`](https://github.com/rustwasm/wasm-bindgen/pull/1233), avoiding
+  issues when logging HTML strings ;)
+
+### `wasm-pack`
+
+* [**We released `wasm-pack`
+  0.6.0! 🎉**](https://github.com/rustwasm/wasm-pack/blob/master/CHANGELOG.md#-060)
+
+* @drager implemented [support for typo
+  detection](https://github.com/rustwasm/wasm-pack/pull/446) in `wasm-pack`'s
+  `Cargo.toml` section.
+
+* @torkve added support for [passing arbitrary extra CLI arguments through
+  `wasm-pack build`](https://github.com/rustwasm/wasm-pack/pull/461) and into
+  `cargo build`. For example, to build with all cargo features enabled:
+  `wasm-pack build -- --all-features`.
+
+* This inspired @chinedufn to add support for [passing arbitrary extra CLI arguments
+  through `wasm-pack test`](https://github.com/rustwasm/wasm-pack/pull/530) and
+  into `cargo test`!
+
+* @fitzgen fixed a bug where [the output of `wasm-pack test` was printed
+  twice](https://github.com/rustwasm/wasm-pack/pull/521).
+
+* @rhysd added support for [emitting the "homepage"
+  field](https://github.com/rustwasm/wasm-pack/pull/531) in our generated
+  `package.json` if it is present in the crate's `Cargo.toml`.
+
+* @jscheffner [fixed `wasm-pack`'s fetching of `chromedriver`
+  binaries](https://github.com/rustwasm/wasm-pack/pull/537) for headless browser
+  testing on Windows.
+
+## Requests for Contribution
+
+*Want to get involved in Rust and WebAssembly? [Join the Rust and WebAssembly
+working group!][get-involved]*
+
+* [All issues labeled "good first issue" in the `rustwasm/*` repositories](https://github.com/issues?q=is%3Aopen+is%3Aissue+user%3Arustwasm+archived%3Afalse+label%3A%22good+first+issue%22)
+
+* [All issues labeled "help wanted" in the `rustwasm/*` repositories](https://github.com/issues?q=is%3Aopen+is%3Aissue+user%3Arustwasm+archived%3Afalse+label%3A%22help+wanted%22)
+
+### New "Help Wanted" Issues
+
+* [`wasm-pack` &mdash; docs: add documentation for working with wasm-pack
+  outside of template](https://github.com/rustwasm/wasm-pack/issues/533)
+
+* [`wasm-pack` &mdash; installer: do not attempt to install to
+  /usr/bin](https://github.com/rustwasm/wasm-pack/issues/470)
+
+[get-involved]: https://github.com/rustwasm/team/blob/master/README.md#get-involved