Dynamic github actions

ci.yml

name: CI
on: [pull_request]
jobs:
  setup:
    name: Setup changed packages Node ${{ matrix.node }} and ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        node: ['12.x']
        os: [ubuntu-20.04]
#        os: [ubuntu-latest, windows-latest, macOS-latest]
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    steps:
      - name: Checkout the repository
        uses: actions/checkout@v1

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

      - name: Cache node modules
        id: lerna-yarn-cache
        uses: actions/cache@v2
        env:
          cache-name: cache-node-modules
        with:
          path: |
            node_modules
            **/node_modules
          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/yarn.lock', '**/package.json') }}
          restore-keys: |
            ${{ runner.os }}-build-${{ env.cache-name }}-
            ${{ runner.os }}-build-
            ${{ runner.os }}-

      - name: Install dependencies if needed.
        if: steps.lerna-yarn-cache.outputs.cache-hit != 'true'
        run: yarn install --ignore-platform --frozen-lockfile

      - name: Get changed packages list
        run: |
          ./node_modules/.bin/lerna changed --json >> changed.json
          cat changed.json

      - id: set-matrix
        run: node scripts/workspace/setMatrix.js
        env:
          OS: ${{ matrix.os }}
          NODE: ${{ matrix.node }}
  test:
    name: ${{ matrix.name }}@${{ matrix.version }} Node ${{ matrix.node }} and ${{ matrix.os }}
    needs: setup
    runs-on: ${{ matrix.os }}
    strategy:
      matrix: ${{ fromJson(needs.setup.outputs.matrix) }}
    steps:
      - name: Checkout the repository
        uses: actions/checkout@v1

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

      - name: Cache node modules
        id: lerna-yarn-cache
        uses: actions/cache@v2
        env:
          cache-name: cache-node-modules
        with:
          path: |
            node_modules
            **/node_modules
          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/yarn.lock', '**/package.json') }}
          restore-keys: |
            ${{ runner.os }}-build-${{ env.cache-name }}-
            ${{ runner.os }}-build-
            ${{ runner.os }}-

      - name: Install dependencies if needed.
        if: steps.lerna-yarn-cache.outputs.cache-hit != 'true'
        run: yarn install --ignore-platform --frozen-lockfile

      - name: Format
        run: yarn run lerna run format:check --scope ${{ matrix.name }}

      - name: Eslint
        run: yarn run lerna run eslint:check --scope ${{ matrix.name }}

      - name: Unit
        run: yarn run lerna run test:coverage --scope ${{ matrix.name }}

      - name: Build
        run: yarn run lerna run build --scope ${{ matrix.name }}

Setmatrix.js

const packages = require('../../changed.json').map(({ name, version }) => ({
  name,
  version,
  os: process.env.OS,
  node: process.env.NODE,
}))

const matrix = JSON.stringify({
  include: packages,
})

console.log(`::set-output name=matrix::${matrix}`)