wasm.yml

name: WASM Build

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

env:
  CARGO_TERM_COLOR: always

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  wasm_build:
    name: Build WASM
    runs-on: ubuntu-latest
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@v5

      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: wasm32-unknown-unknown

      - name: Cache Cargo
        uses: Swatinem/rust-cache@v2
        with:
          # Only save cache from main branch to prevent cache proliferation
          save-if: ${{ github.ref == 'refs/heads/main' }}

      - name: Build WASM
        run: cargo build --package pcb-zen-wasm --target wasm32-unknown-unknown --release

      - name: Check WASM artifact size
        run: |
          WASM_FILE="target/wasm32-unknown-unknown/release/pcb_zen_wasm.wasm"
          
          if [ ! -f "$WASM_FILE" ]; then
            echo "Error: WASM artifact not found"
            exit 1
          fi
          
          # Get file size in bytes
          SIZE=$(stat -c%s "$WASM_FILE" 2>/dev/null || stat -f%z "$WASM_FILE")
          SIZE_MB=$((SIZE / 1024 / 1024))
          
          echo "WASM bundle size: ${SIZE_MB}MB"
          ls -lh "$WASM_FILE"
          
          # Fail if size exceeds 30MB
          if [ $SIZE -gt 31457280 ]; then
            echo "Error: WASM bundle is too large (${SIZE_MB}MB > 30MB)"
            exit 1
          fi
          
          echo "WASM build successful! Size is within limits."