build: Support building on `wasm32-unknown-unknown` without default features

* Don't depend on a particular ahash rng

* chore: Use `getrandom/js` on `wasm32`

* ci: Run `cargo build` for `wasm32-unknown-unknown`

Co-authored-by: Dmitry Dygalo <dmitry@dygalo.dev>

.github/workflows/build.yml

@@ -65,6 +65,38 @@ jobs:
       - run: cargo test --no-fail-fast --features ${{ matrix.draft }}
         working-directory: ./jsonschema
 
+  build-wasm32:
+    strategy:
+      fail-fast: false
+      matrix:
+        target: ['wasm32-unknown-unknown']
+
+    name: Build on ${{ matrix.target }}
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          target: ${{ matrix.target }}
+          override: true
+
+      - name: Cache cargo
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: stable-${{ matrix.target }}-cargo-cache
+
+      - run: cargo build --target ${{ matrix.target }} --no-default-features --features=cli
+        working-directory: ./jsonschema
+
   coverage:
     name: Run test coverage
     runs-on: ubuntu-20.04
@@ -164,7 +196,6 @@ jobs:
         run: pip install dist/*
         working-directory: ./bindings/python
 
-
   fmt:
     name: Rustfmt
     runs-on: ubuntu-20.04

jsonschema/Cargo.toml

@@ -47,6 +47,9 @@ time = { version = "0.3", features = ["parsing", "macros"] }
 url = "2.2"
 uuid = "1"
 
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+getrandom = { version = "0.2", features = ["js"] }
+
 [dev-dependencies]
 bench_helpers = { path = "../bench_helpers" }
 criterion = { version = "0.4.0", features = [], default-features = false }