name: Setup bazel
description: Setup Bazel for CI builds and tests

inputs:
  useCache:
    description: "Cache Bazel artifacts. Use 'true' to enable with rw, 'readonly' to download, and 'false' to disable."
    default: "false"
    required: true
  buildBuddyApiKey:
    description: "BuildBuddy API key for caching Bazel artifacts"
    required: false

runs:
  using: "composite"
  steps:
    - name: Check inputs
      shell: bash
      run: |
        echo "::group::Check inputs"
        if [[ "${{ inputs.useCache }}" != "true" && "${{ inputs.useCache }}" != "readonly" && "${{ inputs.useCache }}" != "false" ]]; then
          echo "Invalid value for 'useCache' input: '${{ inputs.useCache }}'. Must be 'true', 'readonly', or 'false'."
          exit 1
        fi
        if [[ "${{ inputs.useCache }}" == "true" || "${{ inputs.useCache }}" == "readonly" ]] && [[ -z "${{ inputs.buildBuddyApiKey }}" ]]; then
          echo "BuildBuddy API key is required when cache is enabled."
          exit 1
        fi
        echo "::endgroup::"

    - name: Bazel repository cache (Linux)
      uses: actions/cache/restore@88522ab9f39a2ea568f7027eddc7d8d8bc9d59c8 # v3.3.1
      if: runner.os == 'Linux' && (inputs.useCache == 'true' || inputs.useCache == 'readonly')
      with:
        path: |
          ${{ github.workspace }}/tools/pseudo-version
          /home/runner/.cache/bazel
          /home/runner/.cache/shared_bazel_repository_cache
          /home/runner/.cache/shared_bazel_action_cache
        key: bazel

    - name: Configure Bazel
      shell: bash
      if: inputs.useCache == 'true' || inputs.useCache == 'readonly'
      env:
        BUILDBUDDY_ORG_API_KEY: ${{ inputs.buildBuddyApiKey }}
      run: |
        echo "::group::Configure Bazel"
        cat <<EOF >> ~/.bazelrc
        build --bes_results_url=https://app.buildbuddy.io/invocation/
        build --bes_backend=grpcs://remote.buildbuddy.io
        build --remote_cache=grpcs://remote.buildbuddy.io
        build --remote_timeout=3600
        build --experimental_remote_build_event_upload=minimal
        build --experimental_remote_cache_compression
        build --remote_header=x-buildbuddy-api-key=${BUILDBUDDY_ORG_API_KEY}
        EOF
        echo "::endgroup::"

    - name: Configure Bazel (readonly)
      shell: bash
      if: inputs.useCache == 'readonly'
      run: |
        echo "::group::Configure Bazel (readonly)"
        echo "build --remote_upload_local_results=false" >> ~/.bazelrc
        echo "::endgroup::"

    - name: Check bazel version
      shell: bash
      run: bazel version