name: setup-bazel-ci
description: Prepare a Bazel CI runner with shared caches and optional test prerequisites.
inputs:
  target:
    description: Target triple used for cache namespacing.
    required: true
  install-test-prereqs:
    description: Install Node.js and DotSlash for Bazel-backed test jobs.
    required: false
    default: "false"
outputs:
  cache-hit:
    description: Whether the Bazel repository cache key was restored exactly.
    value: ${{ steps.cache_bazel_repository_restore.outputs.cache-hit }}

runs:
  using: composite
  steps:
    - name: Set up Node.js for js_repl tests
      if: inputs.install-test-prereqs == 'true'
      uses: actions/setup-node@v6
      with:
        node-version-file: codex-rs/node-version.txt

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

    - name: Make DotSlash available in PATH (Unix)
      if: inputs.install-test-prereqs == 'true' && runner.os != 'Windows'
      shell: bash
      run: cp "$(which dotslash)" /usr/local/bin

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

    - name: Set up Bazel
      uses: bazelbuild/setup-bazelisk@v3

    # Restore bazel repository cache so we don't have to redownload all the external dependencies
    # on every CI run.
    - name: Restore bazel repository cache
      id: cache_bazel_repository_restore
      uses: actions/cache/restore@v5
      with:
        path: |
          ~/.cache/bazel-repo-cache
        key: bazel-cache-${{ inputs.target }}-${{ hashFiles('MODULE.bazel', 'codex-rs/Cargo.lock', 'codex-rs/Cargo.toml') }}
        restore-keys: |
          bazel-cache-${{ inputs.target }}

    - name: Configure Bazel output root (Windows)
      if: runner.os == 'Windows'
      shell: pwsh
      run: |
        # Use the shortest available drive to reduce argv/path length issues,
        # but avoid the drive root because some Windows test launchers mis-handle
        # MANIFEST paths there.
        $bazelOutputUserRoot = if (Test-Path 'D:\') { 'D:\b' } else { 'C:\b' }
        "BAZEL_OUTPUT_USER_ROOT=$bazelOutputUserRoot" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append

    - name: Enable Git long paths (Windows)
      if: runner.os == 'Windows'
      shell: pwsh
      run: git config --global core.longpaths true