Run special clippy for wasm, forbidding some types/methods

.github/workflows/rust.yml

@@ -156,6 +156,8 @@ jobs:
 
       - run: ./scripts/wasm_bindgen_check.sh --skip-setup
 
+      - run: ./scripts/clippy_wasm.sh
+
       - name: Cranky wasm32
         uses: actions-rs/cargo@v1
         with:

clippy.toml

@@ -1 +1,10 @@
-doc-valid-idents = ["AccessKit", ".."]
+# There is also a scripts/clippy_wasm/clippy.toml which forbids some mthods that are not available in wasm.
+
+msrv = "1.65"
+
+# Allow-list of words for markdown in dosctrings https://rust-lang.github.io/rust-clippy/master/index.html#doc_markdown
+doc-valid-idents = [
+    # You must also update the same list in the root `clippy.toml`!
+    "AccessKit",
+    "..",
+]

scripts/clippy_wasm.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# This scripts run clippy on the wasm32-unknown-unknown target,
+# using a special clippy.toml config file which forbids a few more things.
+
+set -eu
+script_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
+cd "$script_path/.."
+set -x
+
+# Use scripts/clippy_wasm/clippy.toml
+export CLIPPY_CONF_DIR="scripts/clippy_wasm"
+
+cargo cranky --all-features --target wasm32-unknown-unknown --target-dir target_wasm -p egui_demo_app --lib -- --deny warnings

scripts/clippy_wasm/clippy.toml

@@ -0,0 +1,29 @@
+# This is used by `scripts/clippy_wasm.sh` so we can forbid some methods that are not available in wasm.
+#
+# We cannot forbid all these methods in the main `clippy.toml` because of
+# https://github.com/rust-lang/rust-clippy/issues/10406
+
+msrv = "1.65"
+
+# https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_methods
+disallowed-methods = [
+  "std::time::Instant::now",      # use `instant` crate instead for wasm/web compatibility
+  "std::time::Duration::elapsed", # use `instant` crate instead for wasm/web compatibility
+  "std::time::SystemTime::now",   # use `instant` or `time` crates instead for wasm/web compatibility
+
+  # Cannot spawn threads on wasm:
+  "std::thread::spawn",
+]
+
+# https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_types
+disallowed-types = [
+  # Cannot spawn threads on wasm:
+  "std::thread::Builder",
+]
+
+# Allow-list of words for markdown in dosctrings https://rust-lang.github.io/rust-clippy/master/index.html#doc_markdown
+doc-valid-idents = [
+  # You must also update the same list in the root `clippy.toml`!
+  "AccessKit",
+  "..",
+]