action.yml

name: Build Node.js (shared libraries)
description: >
  Downloads the slim tarball built by the `build-tarball` job, extracts it,
  installs Nix (+ cachix + sccache), then builds Node.js and runs the CI
  test suite inside the pinned nix-shell.

inputs:
  extra-nix-flags:
    description: Additional CLI arguments appended to the nix-shell invocation.
    required: false
    default: ''
  cachix-auth-token:
    description: Cachix auth token for nodejs.cachix.org.
    required: false
    default: ''

runs:
  using: composite
  steps:
    - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c  # v8.0.1
      with:
        name: tarballs
        path: tarballs

    - name: Extract tarball
      shell: bash
      run: |
        tar xzf tarballs/*.tar.gz -C "$RUNNER_TEMP"
        echo "TAR_DIR=$RUNNER_TEMP/$(basename tarballs/*.tar.gz .tar.gz)" >> "$GITHUB_ENV"

    - uses: cachix/install-nix-action@96951a368ba55167b55f1c916f7d416bac6505fe  # v31.10.3
      with:
        extra_nix_config: sandbox = true

    - uses: cachix/cachix-action@1eb2ef646ac0255473d23a5907ad7b04ce94065c  # v17
      with:
        name: nodejs
        authToken: ${{ inputs.cachix-auth-token }}

    - name: Configure sccache
      if: github.base_ref == 'main' || github.ref_name == 'main'
      uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3  # v9.0.0
      with:
        script: |
          core.exportVariable('SCCACHE_GHA_ENABLED', 'on');
          core.exportVariable('ACTIONS_CACHE_SERVICE_V2', 'on');
          core.exportVariable('ACTIONS_RESULTS_URL', process.env.ACTIONS_RESULTS_URL || '');
          core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
          core.exportVariable('NIX_SCCACHE', '(import <nixpkgs> {}).sccache');

    - name: Build Node.js and run tests
      shell: bash
      run: |
        nix-shell \
          -I "nixpkgs=$TAR_DIR/tools/nix/pkgs.nix" \
          --pure --keep TAR_DIR --keep FLAKY_TESTS \
          --keep SCCACHE_GHA_ENABLED --keep ACTIONS_CACHE_SERVICE_V2 --keep ACTIONS_RESULTS_URL --keep ACTIONS_RUNTIME_TOKEN \
          --arg loadJSBuiltinsDynamically false \
          --arg ccache "${NIX_SCCACHE:-null}" \
          --arg devTools '[]' \
          --arg benchmarkTools '[]' \
          ${{ inputs.extra-nix-flags }} \
          --run '
              make -C "$TAR_DIR" run-ci -j4 V=1 TEST_CI_ARGS="-p actions --measure-flakiness 9 --skip-tests=$CI_SKIP_TESTS"
          ' "$TAR_DIR/shell.nix"