Test no_std MSRV in CI

Author: daxpedda

.github/workflows/main.yml

@@ -540,13 +540,22 @@ jobs:
   msrv-lib:
     name: Check MSRV for libraries
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - x86_64-unknown-linux-gnu
+          - wasm32-unknown-unknown
+        features:
+          - --no-default-features
+          - ""
     defaults:
       run:
         working-directory: crates/msrv/lib
     steps:
     - uses: actions/checkout@v4
-    - run: rustup update --no-self-update 1.57 && rustup default 1.57
-    - run: cargo build
+    - run: rustup update --no-self-update 1.57 && rustup default 1.57 && rustup target add ${{ matrix.target }}
+    - run: cargo build --target ${{ matrix.target }} ${{ matrix.features }}
 
   msrv-cli:
     name: Check MSRV for CLI tools

crates/msrv/lib/Cargo.toml

@@ -4,21 +4,32 @@ name = "msrv-library-test"
 publish = false
 version = "0.0.0"
 
+[features]
+default = ["std"]
+std = [
+  "wasm-bindgen-backend/std",
+  "wasm-bindgen-macro-support/std",
+  "wasm-bindgen-macro/std",
+  "wasm-bindgen/std",
+  "js-sys/std",
+  "wasm-bindgen-futures/std",
+  "web-sys/std",
+  "wasm-bindgen-test/std",
+]
+
 [dependencies]
-js-sys = { path = "../../js-sys" }
-wasm-bindgen = { path = "../../../" }
-wasm-bindgen-backend = { path = "../../backend" }
-wasm-bindgen-futures = { path = "../../futures" }
-wasm-bindgen-macro = { path = "../../macro" }
-wasm-bindgen-macro-support = { path = "../../macro-support" }
+js-sys = { path = "../../js-sys", default-features = false }
+wasm-bindgen = { path = "../../../", default-features = false }
+wasm-bindgen-backend = { path = "../../backend", default-features = false }
+wasm-bindgen-futures = { path = "../../futures", default-features = false }
+wasm-bindgen-macro = { path = "../../macro", default-features = false }
+wasm-bindgen-macro-support = { path = "../../macro-support", default-features = false }
 wasm-bindgen-shared = { path = "../../shared" }
-wasm-bindgen-test = { path = "../../test" }
+wasm-bindgen-test = { path = "../../test", default-features = false }
 wasm-bindgen-test-macro = { path = "../../test-macro" }
-web-sys = { path = "../../web-sys" }
+web-sys = { path = "../../web-sys", default-features = false }
 
+# Pinned sub-dependencies for MSRV
 bumpalo = "=3.12.0"
 log = "=0.4.18"
-scoped-tls = "=1.0.0"
-
-[patch.crates-io]
-wasm-bindgen = { path = "../../../" }
+scoped-tls = { version = "=1.0.0", optional = false }