.github/actions/bazel/action.yml

name: 'Docker Bazel Run'
description: 'Run a Bazel-based docker image for Protobuf CI testing'
inputs:
  credentials:
    required: true
    description: The GCP credentials to use for reading the docker image
    type: string
  bazel-cache:
    required: true
    description: >
      A unique path for the Bazel cache.  This will trigger the generation
      of a BAZEL_CACHE environment variable inside the container that provides
      the appropriate flags for any bazel command.
    type: string
  version:
    required: false
    description: A pinned Bazel version to use
    default: '5.1.1'
    type: string
  bazel:
    required: false
    description: The Bazel command to run
    type: string
  bash:
    required: false
    description: >
      A bash command to run.  $BAZEL_FLAGS and $BAZEL_STARTUP_FLAGS will be
      available to use for bazel runs.
    type: string

runs:
  using: 'composite'
  steps:
    - name: Authenticate
      id: auth
      uses: ./.github/actions/internal/gcloud-auth
      with:
        credentials: ${{ inputs.credentials }}

    - name: Setup Runner
      uses: ./.github/actions/internal/setup-runner

    - name: Setup Bazel
      id: bazel
      uses: ./.github/actions/internal/bazel-setup
      with:
        credentials-file: ${{ steps.auth.outputs.credentials-file }}
        bazel-cache: ${{ inputs.bazel-cache }}

    - name: Get Linux bazelisk path
      if: runner.os == 'Linux'
      shell: bash
      run: echo "BAZELISK_PATH=~/.cache/bazelisk" >> $GITHUB_ENV

    - name: Get MacOS bazelisk path
      if: runner.os == 'macOS'
      shell: bash
      run: echo "BAZELISK_PATH=~/Library/Caches/bazelisk" >> $GITHUB_ENV

    - name: Get Windows bazelisk path
      if: runner.os == 'Windows'
      shell: bash
      run: echo "BAZELISK_PATH=$LOCALAPPDATA\bazelisk" >> $GITHUB_ENV

    - name: Cache Bazelisk
      if: ${{ github.event_name == 'push' }}
      uses: actions/cache@627f0f41f6904a5b1efbaed9f96d9eb58e92e920 # v3.2.4
      with:
        path: ${{ env.BAZELISK_PATH }}
        key: bazel-${{ runner.os }}-${{ inputs.version }}

    - name: Restore Bazelisk
      if: ${{ github.event_name != 'push' }}
      uses: actions/cache/restore@627f0f41f6904a5b1efbaed9f96d9eb58e92e920 # v3.2.4
      with:
        path: ${{ env.BAZELISK_PATH }}
        key: bazel-${{ runner.os }}-${{ inputs.version }}

    - name: Hook up repository Cache
      shell: bash
      run: echo "BAZEL_FLAGS=$BAZEL_FLAGS --repository_cache=$(pwd)/${{ env.REPOSITORY_CACHE_PATH }}" >> $GITHUB_ENV

    - name: Validate inputs
      if: ${{ (inputs.bash && inputs.bazel) || (!inputs.bash && !inputs.bazel) }}
      shell: bash
      run: echo "Invalid specification of both non-Bazel and Bazel command"; exit 1

    - name: Pin Bazel version
      shell: bash
      run: echo "USE_BAZEL_VERSION=${{ inputs.version }}" >> $GITHUB_ENV

    - name: Output Bazel version
      shell: bash
      run: bazelisk version

    - name: Run Bash
      if: ${{ inputs.bash }}
      run: ${{ inputs.bash }}
      shell: bash

    - name: Run Bazel
      if: ${{ !inputs.bash }}
      run: >-
        bazelisk ${{ steps.bazel.outputs.bazel-startup-flags }}
        ${{ inputs.bazel }} $BAZEL_FLAGS
      shell: bash

    - name: Save Bazel repository cache
      # Only allow repository cache updates during post-submits.
      if: ${{ github.event_name == 'push' }}
      uses: ./.github/actions/internal/repository-cache-save
      with:
        bazel-cache: ${{ inputs.bazel-cache }}