node.js.yml

name: nodejs

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

jobs:
  build:

    runs-on: ubuntu-latest

    strategy:
      matrix:
        node-version: [12.x, 14.x]

    steps:
    - uses: actions/checkout@v2

    - name: Cache rust and zkutil
      id: cache-zkutil
      uses: actions/cache@v2
      with:
        # NOTE: Cache is reset if we cache whole `~/.cargo` instead of `~/.cargo/bin/zkutil`.
        #   Not sure the reason why this happens.
        path: ~/.cargo/bin/zkutil
        key: ${{ runner.os }}-zkutil-${{ hashFiles('./scripts/installZkutil.sh') }}

    # https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-commands-for-github-actions#adding-a-system-path
    - name: Prepend cargo's bin directory to PATH
      run: echo "~/.cargo/bin" >> $GITHUB_PATH

    - name: Install rust and zkutil
      if: steps.cache-zkutil.outputs.cache-hit != 'true'
      run: ./scripts/installZkutil.sh

    - name: Use Node.js ${{ matrix.node-version }}
      uses: actions/setup-node@v1
      with:
        node-version: ${{ matrix.node-version }}

    - run: npm ci
    - run: npm run lint

    - name: Cache circuits
      id: cache-circuits
      uses: actions/cache@v2
      with:
        # NOTE: Just roughly cache all compiled circuits. It can be split further.
        path: build
        # NOTE: Using hash of the following files for the reasons:
        #   - `package.json`: script possibly changes
        #   - `package-lock.json`: circom/snarkjs version possibly changes
        #   - `installZkutil.sh`: zkutil version possibly changes
        # FIXME:
        #   - `proofOfSMP.circom`, proofSuccessfulSMP.circom: circom code possibly change, but
        #     we should also consider the imported circuits.
        key: ${{ runner.os }}-circuits-${{ hashFiles('./package.json', './package-lock.json', './scripts/installZkutil.sh', 'circuits/instance/proofOfSMP.circom', 'circuits/instance/proofSuccessfulSMP.circom') }}
    - name: Build circuits if hasn't been built
      if: steps.cache-circuits.outputs.cache-hit != 'true'
      run: npm run extract_keys

    - run: npm test