Add CI for WASIp1 and WASIp2 targets

Signed-off-by: Till Schneidereit <[email protected]>

Author: tschneidereit

.github/workflows/build.yml

@@ -247,6 +247,53 @@ jobs:
           path: ./target/libmozjs-${{ matrix.target }}.tar.gz
           name: libmozjs-${{ matrix.target }}.tar.gz
 
+  wasi:
+    name: wasm32-${{ matrix.target }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - wasip1
+          - wasip2
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@master
+        id: toolchain
+        with:
+          toolchain: "1.85.0"
+          targets: "wasm32-${{ matrix.target }}"
+      - uses: bytecodealliance/actions/wasmtime/setup@v1
+      - name: Install WASI-SDK
+        run: |
+          cd /tmp
+          curl --retry 5 --retry-all-errors -OL https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-25/wasi-sdk-25.0-x86_64-linux.tar.gz
+          tar -xzf wasi-sdk-25.0-x86_64-linux.tar.gz
+          mv wasi-sdk-25.0-x86_64-linux wasi-sdk
+      - name: Build
+        run: |
+          cargo +${{ steps.toolchain.outputs.name }} build --target=wasm32-${{ matrix.target }}
+        env:
+          WASI_SDK_PATH: "/tmp/wasi-sdk"
+      - name: Test
+        run: |
+          cargo +${{ steps.toolchain.outputs.name }} test --target=wasm32-${{ matrix.target }}
+        env:
+          WASI_SDK_PATH: "/tmp/wasi-sdk"
+          CARGO_TARGET_WASM32_WASIP1_RUNNER: wasmtime run --dir=$PWD::/cwd
+          CARGO_TARGET_WASM32_WASIP2_RUNNER: wasmtime run --dir=$PWD::/cwd
+      - name: Generate artifact attestation
+        uses: actions/attest-build-provenance@v1
+        if: ${{ inputs.release }}
+        with:
+          subject-path: "./target/libmozjs-wasm32-${{ matrix.target }}.tar.gz"
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          path: ./target/libmozjs-wasm32-${{ matrix.target }}.tar.gz
+          name: libmozjs-wasm32-${{ matrix.target }}.tar.gz
+
   linux-cross-compile:
     name: linux (${{ matrix.target }})
     runs-on: ubuntu-latest

mozjs-sys/Cargo.toml

@@ -2,7 +2,7 @@
 name = "mozjs_sys"
 description = "System crate for the Mozilla SpiderMonkey JavaScript engine."
 repository.workspace = true
-version = "0.140.0-5"
+version = "0.140.0-6"
 authors = ["Mozilla", "The Servo Project Developers"]
 links = "mozjs"
 license.workspace = true

mozjs-sys/makefile.cargo

@@ -101,9 +101,14 @@ ifneq ($(HOST),$(TARGET))
             --disable-clang-plugin \
             --disable-jit \
             --disable-shared-memory \
-            --lto=thin \
             --with-sysroot=$(WASI_SDK_PATH)/share/wasi-sysroot \
             $(NULL)
+        # LTO makes `cargo test --wasm32-wasi` take a very very long time. Since build scripts
+        # don't have a way to detect if the build is for `cargo test`, enable LTO for release
+        # builds only.
+        ifneq (debug,$(PROFILE))
+            CONFIGURE_FLAGS += --lto=thin
+        endif
     endif
 
 	ifeq (android,$(findstring android,$(TARGET)))

mozjs/examples/wasm.rs

@@ -6,6 +6,9 @@
 //! and do some setup on both of these. You also need to enter a "realm"
 //! (environment within one global object) before you can execute code.
 
+// The wasm example does not work on wasm32 targets.
+#![cfg(not(target_arch = "wasm32"))]
+
 use ::std::ptr;
 use ::std::ptr::null_mut;