.github/workflows/bazel.yml

# Copyright 2026 The Abseil Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name: Bazel Tests

on:
  workflow_call:
    inputs:
      os:
        description: "GitHub Actions runner OS (e.g. ubuntu-24.04, macos-latest, windows-2022)"
        required: true
        type: string
      toolchain:
        description: "Bazel toolchain config (--config=<toolchain>)"
        required: true
        type: string
      remote_config:
        description: "Bazel remote config (--config=<remote_config>)"
        required: false
        default: "remote"
        type: string
      container_image:
        description: "Docker container image to run in (empty string for host execution)"
        required: false
        default: ""
        type: string
      alternate_options:
        description: "Whether to use ci/absl_alternate_options.h"
        required: false
        default: false
        type: boolean
      stds:
        description: "JSON array of C++ standards to test"
        required: false
        default: '["c++17", "c++20", "c++23"]'
        type: string
      compilation_modes:
        description: "JSON array of Bazel compilation modes to test"
        required: false
        default: '["opt", "fastbuild"]'
        type: string

permissions:
  contents: read

jobs:
  test:
    runs-on: ${{ inputs.os }}
    name: (${{ matrix.std }}, ${{ matrix.compilation_mode }})
    container:
      image: ${{ inputs.container_image }}
      options: --cap-add=SYS_PTRACE
      credentials:
        # TODO(b/573304451): Switch to Workload Identity Federation to avoid the need for secrets.
        username: _json_key
        password: ${{ secrets.GAR_SERVICE_ACCOUNT }}
    strategy:
      fail-fast: false  # Don't cancel all jobs if one fails.
      matrix:
        std: ${{ fromJSON(inputs.stds) }}
        compilation_mode: ${{ fromJSON(inputs.compilation_modes) }}
    defaults:
      run:
        shell: bash
    env:
      BAZEL_LLVM: C:\Program Files\LLVM
      MSYS2_ARG_CONV_EXCL: "*"
      USE_BAZEL_VERSION: 9.x
    steps:
      - name: Checkout
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # 7.0.0

      - name: Set up alternate options
        if: ${{ inputs.alternate_options }}
        run: cp ci/absl_alternate_options.h absl/base/options.h

      - name: Setup continuous run
        if: ${{ github.event_name == 'schedule' }}
        # Force builds and tests to run on scheduled runs.
        run: echo "EXTRA_BAZEL_ARGS=--cache_test_results=no --action_env=FORCE_REBUILD=1" >> $GITHUB_ENV

      - name: Set up Bazel and caches
        uses: bazel-contrib/setup-bazel@c5acdfb288317d0b5c0bbd7a396a3dc868bb0f86 # 0.19.0
        with:
          cache-save: true
          bazelisk-cache: true
          external-cache: true
          repository-cache: true
          google-credentials: ${{ secrets.GAR_SERVICE_ACCOUNT }}
          bazelrc: common --config=${{ inputs.remote_config }}

      - name: Fetch all external dependencies
        run: bazel fetch //...

      - name: Run tests
        run: >
          bazel test ...
          --config=${{ inputs.toolchain }}
          --cxxopt=${{ startsWith(inputs.os, 'windows') && '/std:' || '-std=' }}${{ matrix.std }}
          --host_cxxopt=${{ startsWith(inputs.os, 'windows') && '/std:' || '-std=' }}${{ matrix.std }}
          --compilation_mode=${{ matrix.compilation_mode }}
          ${{ env.EXTRA_BAZEL_ARGS }}