bazel.yml

name: Bazel (experimental)

# Note this workflow was originally derived from:
# https://github.com/cerisier/toolchains_llvm_bootstrapped/blob/main/.github/workflows/ci.yaml

on:
  pull_request: {}
  push:
    branches:
      - main
  workflow_dispatch:

concurrency:
  # Cancel previous actions from the same PR or branch except 'main' branch.
  # See https://docs.github.com/en/actions/using-jobs/using-concurrency and https://docs.github.com/en/actions/learn-github-actions/contexts for more info.
  group: concurrency-group::${{ github.workflow }}::${{ github.event.pull_request.number > 0 && format('pr-{0}', github.event.pull_request.number) || github.ref_name }}${{ github.ref_name == 'main' && format('::{0}', github.run_id) || ''}}
  cancel-in-progress: ${{ github.ref_name != 'main' }}
jobs:
  test:
    strategy:
      fail-fast: false
      matrix:
        include:
          # macOS
          - os: macos-15-xlarge
            target: aarch64-apple-darwin
          - os: macos-15-xlarge
            target: x86_64-apple-darwin

          # Linux
          - os: ubuntu-24.04-arm
            target: aarch64-unknown-linux-gnu
          - os: ubuntu-24.04
            target: x86_64-unknown-linux-gnu
          - os: ubuntu-24.04-arm
            target: aarch64-unknown-linux-musl
          - os: ubuntu-24.04
            target: x86_64-unknown-linux-musl
          # TODO: Enable Windows once we fix the toolchain issues there.
          #- os: windows-latest
          #  target: x86_64-pc-windows-gnullvm
    runs-on: ${{ matrix.os }}

    # Configure a human readable name for each job
    name: Local Bazel build on ${{ matrix.os }} for ${{ matrix.target }}

    steps:
      - uses: actions/checkout@v6

      # Some integration tests rely on DotSlash being installed.
      # See https://github.com/openai/codex/pull/7617.
      - name: Install DotSlash
        uses: facebook/install-dotslash@v2

      - name: Make DotSlash available in PATH (Unix)
        if: runner.os != 'Windows'
        run: cp "$(which dotslash)" /usr/local/bin

      - name: Make DotSlash available in PATH (Windows)
        if: runner.os == 'Windows'
        shell: pwsh
        run: Copy-Item (Get-Command dotslash).Source -Destination "$env:LOCALAPPDATA\Microsoft\WindowsApps\dotslash.exe"

      # Install Bazel via Bazelisk
      - name: Set up Bazel
        uses: bazelbuild/setup-bazelisk@v3

      # TODO(mbolin): Bring this back once we have caching working. Currently,
      # we never seem to get a cache hit but we still end up paying the cost of
      # uploading at the end of the build, which takes over a minute!
      #
      # Cache build and external artifacts so that the next ci build is incremental.
      # Because github action caches cannot be updated after a build, we need to
      # store the contents of each build in a unique cache key, then fall back to loading
      # it on the next ci run. We use hashFiles(...) in the key and restore-keys- with
      # the prefix to load the most recent cache for the branch on a cache miss. You
      # should customize the contents of hashFiles to capture any bazel input sources,
      # although this doesn't need to be perfect. If none of the input sources change
      # then a cache hit will load an existing cache and bazel won't have to do any work.
      # In the case of a cache miss, you want the fallback cache to contain most of the
      # previously built artifacts to minimize build time. The more precise you are with
      # hashFiles sources the less work bazel will have to do.
      # - name: Mount bazel caches
      #   uses: actions/cache@v5
      #   with:
      #     path: |
      #       ~/.cache/bazel-repo-cache
      #       ~/.cache/bazel-repo-contents-cache
      #     key: bazel-cache-${{ matrix.os }}-${{ hashFiles('**/BUILD.bazel', '**/*.bzl', 'MODULE.bazel') }}
      #     restore-keys: |
      #       bazel-cache-${{ matrix.os }}

      - name: Configure Bazel startup args (Windows)
        if: runner.os == 'Windows'
        shell: pwsh
        run: |
          # Use a very short path to reduce argv/path length issues.
          "BAZEL_STARTUP_ARGS=--output_user_root=C:\" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append

      - name: bazel test //...
        env:
          BUILDBUDDY_API_KEY: ${{ secrets.BUILDBUDDY_API_KEY }}
        shell: bash
        run: |
          bazel_args=(
            test
            //...
            --test_verbose_timeout_warnings
            --build_metadata=REPO_URL=https://github.com/openai/codex.git
            --build_metadata=COMMIT_SHA=$(git rev-parse HEAD)
            --build_metadata=ROLE=CI
            --build_metadata=VISIBILITY=PUBLIC
          )

          if [[ -n "${BUILDBUDDY_API_KEY:-}" ]]; then
            echo "BuildBuddy API key is available; using remote Bazel configuration."
            bazel $BAZEL_STARTUP_ARGS \
              --bazelrc=.github/workflows/ci.bazelrc \
              "${bazel_args[@]}" \
              "--remote_header=x-buildbuddy-api-key=$BUILDBUDDY_API_KEY"
          else
            echo "BuildBuddy API key is not available; using local Bazel configuration."
            # Keep fork/community PRs on Bazel but disable remote services that are
            # configured in .bazelrc and require auth.
            #
            # Flag docs:
            # - Command-line reference: https://bazel.build/reference/command-line-reference
            # - Remote caching overview: https://bazel.build/remote/caching
            # - Remote execution overview: https://bazel.build/remote/rbe
            # - Build Event Protocol overview: https://bazel.build/remote/bep
            #
            # --noexperimental_remote_repo_contents_cache:
            #   disable remote repo contents cache enabled in .bazelrc startup options.
            #   https://bazel.build/reference/command-line-reference#startup_options-flag--experimental_remote_repo_contents_cache
            # --remote_cache= and --remote_executor=:
            #   clear remote cache/execution endpoints configured in .bazelrc.
            #   https://bazel.build/reference/command-line-reference#common_options-flag--remote_cache
            #   https://bazel.build/reference/command-line-reference#common_options-flag--remote_executor
            bazel $BAZEL_STARTUP_ARGS \
              --noexperimental_remote_repo_contents_cache \
              "${bazel_args[@]}" \
              --remote_cache= \
              --remote_executor=
          fi