Run wasm-bindgen in CI and update parking_lot (#1293)

* Run wasm-bindgen in CI
* Update parking_lot 0.11 -> 0.12

sh/build_demo_web.sh

@@ -56,8 +56,12 @@ TARGET=`cargo metadata --format-version=1 | jq --raw-output .target_directory`
 
 echo "Generating JS bindings for wasm…"
 TARGET_NAME="${CRATE_NAME}.wasm"
-wasm-bindgen "${TARGET}/wasm32-unknown-unknown/$BUILD/$TARGET_NAME" \
-  --out-dir docs --no-modules --no-typescript
+WASM_PATH="${TARGET}/wasm32-unknown-unknown/$BUILD/$TARGET_NAME"
+wasm-bindgen ${WASM_PATH} --out-dir docs --no-modules --no-typescript
+
+# if this fails with "error: cannot import from modules (`env`) with `--no-modules`", you can use:
+# wasm2wat target/wasm32-unknown-unknown/release/egui_demo_app.wasm | rg env
+# wasm2wat target/wasm32-unknown-unknown/release/egui_demo_app.wasm | rg "call .now\b" -B 20 # What calls `$now` (often a culprit)
 
 # to get wasm-strip:  apt/brew/dnf install wabt
 # wasm-strip docs/${CRATE_NAME}_bg.wasm

sh/check.sh

@@ -46,8 +46,10 @@ cargo doc --document-private-items --no-deps --all-features
 (cd epaint && cargo check --all-features)
 (cd epi && cargo check --all-features)
 
+./sh/wasm_bindgen_check.sh --fast
+
 # cargo install cargo-deny
-# cargo deny check
+cargo deny check
 
 # ------------------------------------------------------------
 #

sh/wasm_bindgen_check.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+set -eu
+script_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
+cd "$script_path/.."
+
+CRATE_NAME="egui_demo_app"
+FEATURES="http,persistence,screen_reader"
+
+# This is required to enable the web_sys clipboard API which egui_web uses
+# https://rustwasm.github.io/wasm-bindgen/api/web_sys/struct.Clipboard.html
+# https://rustwasm.github.io/docs/wasm-bindgen/web-sys/unstable-apis.html
+export RUSTFLAGS=--cfg=web_sys_unstable_apis
+
+echo "Building rust…"
+BUILD=debug # debug builds are faster
+
+(cd $CRATE_NAME &&
+  cargo build \
+    --lib \
+    --target wasm32-unknown-unknown \
+    --no-default-features \
+    --features ${FEATURES}
+)
+
+TARGET="target"
+
+echo "Generating JS bindings for wasm…"
+
+rm -f "${CRATE_NAME}_bg.wasm" # Remove old output (if any)
+
+TARGET_NAME="${CRATE_NAME}.wasm"
+wasm-bindgen "${TARGET}/wasm32-unknown-unknown/$BUILD/$TARGET_NAME" \
+  --out-dir . --no-modules --no-typescript
+
+# Remove output:
+rm -f "${CRATE_NAME}_bg.wasm"
+rm -f "${CRATE_NAME}.js"