ci.yml

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 or update Yarn cache (fix w/ "yarn install")'
        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 --mode=skip-build

  yarn-validate:
    name: Validate Yarn dependencies and constraints
    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: "*"
      - name: 'Check for unmet constraints (fix w/ "yarn constraints --fix")'
        run: |
          yarn constraints
      - name: 'Check for duplicate dependencies (fix w/ "yarn dedupe")'
        if: steps.yarn-cache.outputs.cache-hit != 'true'
        run: |
          yarn dedupe --check
      - name: Check for dependency cycles
        run: |
          yarn release-tool check-cycles

  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: 17
      - 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

  build:
    name: Build Babel Artifacts
    needs: prepare-yarn-cache
    runs-on: ubuntu-latest
    # Yarn PnP does not support native ESM yet (https://github.com/yarnpkg/berry/issues/638)
    # 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
      - name: Ensure cwd does not contain uncommitted changes
        run: |
          ./scripts/assert-dir-git-clean.sh
      - 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 ${{ matrix.node-version }} to this title
    needs: build
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [16, 14, 12, 10, 8, 6]
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Use Node.js latest # Run yarn on latest node
        uses: actions/setup-node@v2-beta
        with:
          node-version: "*" # Build Babel on latest node LTS versions
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
        run: echo "::set-output name=dir::$(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
          # Deduplicate dependencies, because duplicate copies of graceful-fs cause
          # problems with the "path" module: https://github.com/facebook/jest/issues/9656
          yarn dedupe
      - 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 --max-old-space-size=4096 ./node_modules/.bin/jest --ci --color
        env:
          TEST_FUZZ: "${{ (matrix.node-version == '6' || matrix.node-version == '8' || matrix.node-version == '10') && 'false' || 'true' }}"

  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 14.17
        uses: actions/setup-node@v2-beta
        with:
          node-version: "14.17" # Node.js 14.17 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: Lint
        run: make -j tscheck flowcheck-ci lint-ci
        env:
          BABEL_ENV: test
          BABEL_8_BREAKING: true
          BABEL_TYPES_8_BREAKING: 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

  runtime-interop:
    name: Test @babel/runtime integrations
    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
        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') }}
      # See https://github.com/babel/babel/pull/12906
      - name: Support self-references on old Node.js
        run: |
          echo '{
            "private": true,
            "devDependencies": {
              "@babel/runtime": "workspace:*",
              "@babel/runtime-corejs3": "workspace:*"
            }
          }' > packages/package.json
          node -e "
            const pkg = require('./package.json');
            pkg.workspaces.push('packages');
            fs.writeFileSync('package.json', JSON.stringify(pkg, null, 2))
          "
      - name: Install
        run: yarn install
        env:
          # The "Support self-references on old Node.js" step mutates the
          # package.json file, causing a yarn.lock update.
          YARN_ENABLE_IMMUTABLE_INSTALLS: false
      - uses: actions/download-artifact@v2
        with:
          name: babel-artifact
      - name: Generate runtime helpers
        run: |
          make build-plugin-transform-runtime-dist
      - name: Generate absoluteRuntime tests
        run: yarn test:runtime:generate-absolute-runtime
      - name: Test bundlers
        run: yarn test:runtime:bundlers
      - name: Test Node.js
        run: yarn test:runtime:node
      - name: Use Node.js 10
        uses: actions/setup-node@v2-beta
        with:
          node-version: 10
      - name: Test Node.js 10
        run: node test/runtime-integration/node.cjs
      - name: Use Node.js 12.0
        uses: actions/setup-node@v2-beta
        with:
          node-version: "12.0" # quoted, otherwise it's just 13
      - name: Test Node.js 12.0
        run: yarn test:runtime:node
      - name: Use Node.js 12.17
        uses: actions/setup-node@v2-beta
        with:
          node-version: 12.17
      - name: Test Node.js  12.17
        run: yarn test:runtime:node
      - name: Use Node.js 13.0
        uses: actions/setup-node@v2-beta
        with:
          node-version: "13.0" # quoted, otherwise it's just 13
      - name: Test Node.js 13.0
        run: yarn test:runtime:node
      - name: Use Node.js 13.2
        uses: actions/setup-node@v2-beta
        with:
          node-version: 13.2
      - name: Test Node.js 13.2
        run: yarn test:runtime:node
      - name: Use Node.js 13.6
        uses: actions/setup-node@v2-beta
        with:
          node-version: 13.6
      - name: Test Node.js 13.6
        run: yarn test:runtime:node
      - name: Use Node.js 13.7
        uses: actions/setup-node@v2-beta
        with:
          node-version: 13.7
      - name: Test Node.js 13.7
        run: yarn test:runtime:node
      - name: Use Node.js 14.2
        uses: actions/setup-node@v2-beta
        with:
          node-version: 14.2
      - name: Test Node.js 14.2
        run: yarn test:runtime:node
      - name: Use Node.js 16.5
        uses: actions/setup-node@v2-beta
        with:
          node-version: 16.5
      - name: Test Node.js 16.5
        run: yarn test:runtime:node
      - name: Use Node.js 16.6
        uses: actions/setup-node@v2-beta
        with:
          node-version: 16.6
      - name: Test Node.js 16.6
        run: yarn test:runtime:node