add CI check to build wasm for all crates (with runtime-benchmarks feature if applicable)

.github/workflows/ci.yml

@@ -60,4 +60,17 @@ jobs:
 
       - name: Fail-fast; cancel other jobs
         if: failure()
-        uses: andymckay/[email protected]
+        uses: andymckay/[email protected]
+
+  check-wasm:
+    if: ${{ !startsWith(github.head_ref, 'release/') }}
+    name: Check wasm build
+    runs-on: ubuntu-latest
+    continue-on-error: false
+    steps:
+      - uses: actions/checkout@v3
+      - run: sudo apt-get install -y protobuf-compiler
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: check-debug-cache
+      - run: ./scripts/run_for_all_no_std_crates.sh check --no-default-features --target=wasm32-unknown-unknown

balances-tx-payment/rpc/runtime-api/src/lib.rs

@@ -21,8 +21,6 @@
 use core::fmt;
 use frame_support::pallet_prelude::TypeInfo;
 use parity_scale_codec::{Decode, Encode};
-#[cfg(not(feature = "std"))]
-use sp_std::vec::Vec;
 
 /// Error type of this RPC api.
 #[derive(Encode, Decode, Clone, PartialEq, Eq, Debug, TypeInfo)]

democracy/src/lib.rs

@@ -45,8 +45,6 @@ use sp_std::vec::Vec;
 #[cfg(not(feature = "std"))]
 extern crate alloc;
 
-#[cfg(not(feature = "std"))]
-use alloc::string::String;
 #[cfg(not(feature = "std"))]
 use alloc::string::ToString;
 use frame_support::traits::Currency;

scripts/run_for_all_no_std_crates.sh

@@ -0,0 +1,18 @@
+find . -name "Cargo.toml" | while read -r CARGO_TOML; do
+  DIR=$(dirname "$CARGO_TOML")
+  echo "Checking in directory: $DIR"
+
+  # Skip the loop if the crate does not have a feature `std`
+  if ! grep -q "\[features\]" "$CARGO_TOML" || ! grep -q "std = \[" "$CARGO_TOML"; then
+      echo "Feature 'std' not found in $CARGO_TOML. Skipping."
+      continue
+  fi
+
+  if grep -q "\[features\]" "$CARGO_TOML" && grep -q "runtime-benchmarks = \[" "$CARGO_TOML"; then
+      echo "Feature 'runtime-benchmarks' found, adding this feature."
+      cargo $COMMAND $@ --features runtime-benchmarks --manifest-path "$CARGO_TOML"
+  else
+      echo "Feature 'runtime-benchmarks' not found, running command without this feature"
+      cargo $COMMAND $@ --manifest-path "$CARGO_TOML";
+  fi
+done

treasuries/rpc/runtime-api/src/lib.rs

@@ -18,9 +18,6 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
-#[cfg(not(feature = "std"))]
-use sp_std::vec::Vec;
-
 use encointer_primitives::communities::CommunityIdentifier;
 use parity_scale_codec::{Decode, Encode};