artifacts.yaml

name: build-circuits

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

on:
  pull_request:
    branches: [ "main" ]

jobs:
  check-version:
    name: Check package.json version update
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        fetch-depth: 2  # Fetch two commits to get the base branch

    - name: Fetch main branch
      run: |
        git fetch origin main
    - name: Compare package.json version with main
      id: version_check
      run: |
        # Extract version from package.json in PR branch
        PR_VERSION=$(jq -r .version package.json)
        # Extract version from package.json in main branch
        MAIN_VERSION=$(git show origin/main:package.json | jq -r .version)
        echo "PR version: $PR_VERSION"
        echo "Main version: $MAIN_VERSION"
        # Fail if versions match
        if [ "$PR_VERSION" == "$MAIN_VERSION" ]; then
          echo "Error: package.json version has not been updated in this PR."
          exit 1
        else
          echo "package.json version has been updated in this PR."
        fi

  build:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        fetch-depth: 0  # Need full history to compare with previous release

    - name: Install Protocol Buffers
      run: |
        sudo apt-get update
        sudo apt-get install -y protobuf-compiler libprotobuf-dev

    - name: Install Rust
      uses: dtolnay/rust-toolchain@master
      with:
        toolchain: nightly-2024-06-10

    - uses: Swatinem/rust-cache@v2
      with:
        cache-on-failure: true

    - name: Install Circom
      run: |
        CIRCOM_VERSION=2.1.9
        curl -L https://github.com/iden3/circom/releases/download/v$CIRCOM_VERSION/circom-linux-amd64 -o circom
        chmod +x circom
        sudo mv circom /usr/local/bin/
        circom --version

    - name: Install circom-witnesscalc
      run: |
        cd .. && git clone https://github.com/pluto/circom-witnesscalc.git
        cd circom-witnesscalc
        cargo install --path .
        echo $(which build-circuit)

    - name: Install Node.js dependencies
      run: |
        npm ci

    - name: Get package version
      id: package_version
      run: |
        VERSION=$(node -p "require('./package.json').version")
        echo "VERSION=$VERSION" >> $GITHUB_ENV

    - name: Compile Circom circuits
      run: |
        mkdir -p artifacts
        for circuit in circuits/*.circom; do
          if [ -f "$circuit" ]; then
            filename=$(basename "$circuit" .circom)
            output_dir="artifacts/$filename"
            mkdir -p "$output_dir"

            echo "Processing $filename..."

            # Run circom compilation
            circom "$circuit" --r1cs --wasm -o "$output_dir" -l node_modules

            # Run witness calculator build
            build-circuit "$circuit" "$output_dir/$filename.bin" -l node_modules
          fi
        done

    - name: Create release artifacts
      run: |
        cd artifacts
        zip -r ../circom-artifacts-v${{ env.VERSION }}.zip ./*
        cd ..

    # Upload artifacts for PR
    - name: Upload artifacts for PR
      if: github.event_name == 'pull_request'
      uses: actions/upload-artifact@v4
      with:
        name: circom-artifacts-v${{ env.VERSION }}
        path: circom-artifacts-v${{ env.VERSION }}.zip
        retention-days: 5