name: CI

on: [push, pull_request]

jobs:
  prepare-yarn-cache:
    name: Prepare Cache
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js latest
        uses: actions/setup-node@v2-beta
        with:
          node-version: "*"
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
      - uses: actions/cache@v2
        id: yarn-cache
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-${{ hashFiles('yarn.lock') }}
          restore-keys: |
            yarn-
      - name: Check Yarn dedupe
        if: steps.yarn-cache.outputs.cache-hit != 'true'
        run: |
          yarn dedupe --check
      - name: Check or update Yarn cache
        env:
          YARN_ENABLE_SCRIPTS: false # disable post-install scripts
          YARN_NODE_LINKER: pnp # use pnp linker for better linking performance: it's meant to update yarn cache only
        run: |
          yarn install --immutable --skip-builds

  test-coverage:
    name: Test on Node.js Latest
    needs: prepare-yarn-cache
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js latest
        uses: actions/setup-node@v2-beta
        with:
          node-version: "15"
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
      - uses: actions/cache@v2
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-${{ hashFiles('yarn.lock') }}
      - name: Generate coverage report
        run: |
          make -j test-ci-coverage
          yarn test:esm
      - name: Upload coverage report
        uses: codecov/codecov-action@v1
        with:
          token: ${{ secrets.CODECOV_TOKEN }}

  build:
    name: Build Babel Artifacts
    needs: prepare-yarn-cache
    runs-on: ubuntu-latest
    env:
      YARN_NODE_LINKER: pnp # use pnp linker for better linking performance and stricter checks
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js latest
        uses: actions/setup-node@v2-beta
        with:
          node-version: "*"
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
      - uses: actions/cache@v2
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-${{ hashFiles('yarn.lock') }}
          restore-keys: |
            yarn-
      - name: Build babel artifacts
        run: |
          BABEL_ENV=test-legacy make -j build-standalone-ci
        env:
          BABEL_8_BREAKING: false
          STRIP_BABEL_8_FLAG: true
      - uses: actions/upload-artifact@v2
        with:
          name: babel-artifact
          path: |
            codemods/*/lib/**/*
            eslint/*/lib/**/*
            packages/*/lib/**/*
            packages/babel-standalone/*.js
            !**/node_modules/**

  lint:
    name: Lint
    needs: build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js latest
        uses: actions/setup-node@v2-beta
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
      - uses: actions/cache@v2
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-${{ hashFiles('yarn.lock') }}
      - name: Install
        run: yarn install
      - uses: actions/download-artifact@v2
        with:
          name: babel-artifact
      - name: Lint
        run: make -j tscheck flowcheck-ci lint-ci

  test:
    name: Test on Node.js # GitHub will add ${{ matrix.node-version }} to this title
    needs: build
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [14, 12, 10, 8, 6]
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js latest # Run yarn on latest node
        uses: actions/setup-node@v2-beta
        with:
          node-version: "*" # Build Babel on latest node LTS versions
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
      - uses: actions/cache@v2
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-${{ hashFiles('yarn.lock') }}
      - name: Install
        run: |
          yarn install
      - name: Downgrade Jest for node <= 8
        if: matrix.node-version == '6' || matrix.node-version == '8'
        run: |
          yarn remove jest
          yarn add --dev jest@24
          # Pin stack-utils to 1.0.2 https://github.com/tapjs/stack-utils/issues/56
          yarn set resolution stack-utils@npm:^1.0.1 1.0.2
      - uses: actions/download-artifact@v2
        with:
          name: babel-artifact
      - name: Generate runtime helpers
        run: |
          make build-plugin-transform-runtime-dist
      - name: Use Node.js ${{ matrix.node-version }} # Checkout node version for test executor
        uses: actions/setup-node@v2-beta
        with:
          node-version: ${{ matrix.node-version }}
      - name: Test on node.js ${{ matrix.node-version }}
        # Hack: --color has supports-color@5 returned true for GitHub CI
        # Remove once `chalk` is bumped to 4.0.

        # Todo(Babel 8): Jest execution path is hardcoded because Yarn 2 does not support node 6
        run: |
          BABEL_ENV=test node ./node_modules/.bin/jest --ci --color

  test-babel-8-breaking:
    name: Test Babel 8 breaking changes
    needs: prepare-yarn-cache
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js 12
        uses: actions/setup-node@v2-beta
        with:
          node-version: 12 # Node.js 12 is the first LTS supported by Babel 8
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
      - uses: actions/cache@v2
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-${{ hashFiles('yarn.lock') }}
      - name: Install and build
        run: make -j bootstrap
        env:
          BABEL_ENV: test
          BABEL_8_BREAKING: true
          STRIP_BABEL_8_FLAG: true
      - name: Test
        # Hack: --color has supports-color@5 returned true for GitHub CI
        # Remove once `chalk` is bumped to 4.0.
        run: |
          yarn jest --ci --color
          yarn test:esm
        env:
          BABEL_ENV: test
          BABEL_8_BREAKING: true
          BABEL_TYPES_8_BREAKING: true

  test-windows:
    name: Test on Windows
    needs: build
    runs-on: windows-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js latest
        uses: actions/setup-node@v2-beta
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
      - uses: actions/cache@v2
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-${{ hashFiles('yarn.lock') }}
      - name: Install
        run: yarn install
      - uses: actions/download-artifact@v2
        with:
          name: babel-artifact
      - name: Generate runtime helpers
        run: |
          make build-plugin-transform-runtime-dist
      - name: Test on Windows
        # Hack: --color has supports-color@5 returned true for GitHub CI
        # Remove once `chalk` is bumped to 4.0.
        run: yarn jest --ci --color
        env:
          BABEL_ENV: test

  external-parser-tests:
    name: Third-party Parser Tests
    needs: build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js latest
        uses: actions/setup-node@v2-beta
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
      - uses: actions/cache@v2
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-${{ hashFiles('yarn.lock') }}
      - name: Install
        run: yarn install
      - uses: actions/download-artifact@v2
        with:
          name: babel-artifact
      - name: Download tests
        run: make -j bootstrap-flow bootstrap-typescript bootstrap-test262
      - name: Run Test262 Tests
        run: make test-test262
      - name: Run Flow Tests
        run: make test-flow
      - name: Run TypeScript Tests
        run: make test-typescript