Test the emscripten code on circle-ci (#119)

* Test the emscripten code on circle-ci

* Fix missing from workflow

.circleci/config.yml

@@ -5,6 +5,7 @@ workflows:
   build:
     jobs:
       - test
+      - test-emscripten
       - integration_test
 
 jobs:
@@ -33,10 +34,26 @@ jobs:
           name: Run tests, inside a docker image
           command: docker run --rm -v "/cache/cargo/registry:/usr/local/cargo/registry" -v "/cache/target:/app/target" -it rust-libp2p cargo test
       - save_cache:
-          key: docker-cache
+          key: test-cache
           paths:
             - "/cache"
 
+  test-emscripten:
+    docker:
+      - image: tomaka/rustc-emscripten
+    steps:
+      - checkout
+      - restore_cache:
+          key: test-emscripten-cache
+      - run:
+          name: Build for emscripten
+          command: cargo build --target asmjs-unknown-emscripten --package libp2p-websocket   # TODO: build all?
+      - save_cache:
+          key: test-emscripten-cache
+          paths:
+            - "~/.cargo"
+            - "./target"
+
   integration_test:
     docker:
       - image: rust

Cargo.toml

@@ -21,8 +21,12 @@ members = [
     "example",
 ]
 
-[replace]
+[patch.crates-io]
 # TODO: Update ring and solve conflicts
-"ring:0.12.1" = { git = "https://github.com/briansmith/ring", rev = "3a14ef619559f7d4b69e2286d49c833409eef34a" }
+"ring" = { git = "https://github.com/briansmith/ring", rev = "3a14ef619559f7d4b69e2286d49c833409eef34a" }
 # Using a local improved version of multiaddr for now
-"multiaddr:0.2.0" = { path = "./rust-multiaddr" }
+# TODO: remove once merged upstream
+"multiaddr" = { path = "./rust-multiaddr" }
+# Using a version of rust-multihash that compiles on emscripten
+# TODO: remove once merged upstream
+"multihash" = { git = "https://github.com/tomaka/rust-multihash", branch = "emscripten-hack" }