continuous-integration-javascript.yml

on:
  merge_group:
    types:
      - checks_requested
  pull_request:
    # We do not run tests on master as the changes were already tested when opening a PR,
    # and we require every PR to be up-to-date before merging it to master.
    types:
      - opened
      - synchronize
      - reopened

env:
  CI: true
  NODE_OPTIONS: --max-old-space-size=6144
  BABEL_DISABLE_CACHE: '1'

jobs:
  javascript-test:
    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      matrix:
        # We support only Node.js versions with "LTS" and "Current" status (no "Maintenance").
        # See: https://nodejs.dev/en/about/releases/
        # See: https://github.com/nodejs/Release
        node-version: [20.x, 21.x, 22.x]

    steps:
      # https://github.com/actions/checkout
      - uses: actions/checkout@v4.2.2
        with:
          # Number of commits to fetch. 0 indicates all history for all branches and tags.
          fetch-depth: 0

      # https://github.com/dorny/paths-filter
      - uses: dorny/paths-filter@v3.0.2
        id: paths-filter
        with:
          filters: .github/filters.js.yaml

      # https://github.com/actions/setup-node
      - name: Use Node.js ${{ matrix.node-version }}
        if: steps.paths-filter.outputs.src == 'true'
        uses: actions/setup-node@v4.1.0
        with:
          node-version: ${{ matrix.node-version }}

      - name: Get Yarn cache directory path
        if: steps.paths-filter.outputs.src == 'true'
        id: yarn-cache-dir-path
        run: echo "dir=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT

      # https://github.com/actions/cache
      - name: Restore Yarn cache
        if: steps.paths-filter.outputs.src == 'true'
        uses: actions/cache@v4.2.0
        with:
          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
          key: yarn-cache-folder-${{ hashFiles('**/yarn.lock', '.yarnrc.yml') }}
          restore-keys: |
            yarn-cache-folder-

      # https://github.com/dtolnay/rust-toolchain
      - uses: dtolnay/rust-toolchain@stable
        if: steps.paths-filter.outputs.src == 'true'

      - name: Install Yarn dependencies
        if: steps.paths-filter.outputs.src == 'true'
        run: ./x install -- --immutable

      - name: Check Yarn constraints
        if: steps.paths-filter.outputs.src == 'true'
        run: yarn constraints # TODO: move to `./x install` (?)

      # We are purposefully expecting zero warnings in the output to make sure flowtests are
      # working as expected (Flow returns warnings for unused suppression comments).
      - name: Run Flow check
        if: steps.paths-filter.outputs.src == 'true'
        run: ./x flow -- --max-warnings=0

      # TypeScript can be used in one of two ways - as a linter, or as a build tool.
      # We are using it as a linter on a monorepo level and as a build tool on individual packages.
      - name: Run TypeScript check
        if: steps.paths-filter.outputs.src == 'true'
        run: yarn tsc --allowJs --project tsconfig.json # TODO: `./x ts`

      - name: Run Eslint check
        if: steps.paths-filter.outputs.src == 'true'
        run: ./x lints

      - name: Run Jest tests
        if: steps.paths-filter.outputs.src == 'true'
        run: ./x tests

      - name: Run monorepo scanner
        if: steps.paths-filter.outputs.src == 'true'
        run: ./x scanner

      # Runs the Relay Compiler for the whole monorepo and exit if there are new changes
      # (meaning the generated files are not up-to-date).
      - name: Run Relay check
        if: steps.paths-filter.outputs.src == 'true'
        run: ./x relay -- --validate

      - name: Make sure there are no file changes generated by our scripts
        run: git diff --exit-code

  # The purpose of this job is to wait for the completion of the `javascript-test` jobs (matrix)
  # and evaluate whether the run was successful or not. This is useful when configuring the
  # required jobs in GitHub UI (we can require just this one job instead of all the jobs in
  # the test matrix).
  javascript-test-results:
    if: ${{ always() }}
    runs-on: ubuntu-latest
    needs: [javascript-test]
    steps:
      - run: |
          result="${{ needs.javascript-test.result }}"
          if [[ $result == "success" || $result == "skipped" ]]; then
            exit 0
          else
            exit 1
          fi