#===----------------------------------------------------------------------===##
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
#===----------------------------------------------------------------------===##

#
# This file describes the various pre-commit CI bots used to test Clang against
# libc++ under various configurations. Unlike the usual libc++ CI pipeline,
# which aims to test libc++ itself, this pipeline aims to test Clang by
# compiling libc++ and running its test suite against the just-built Clang,
# in various configurations.
#
env:
    # LLVM RELEASE bump version
    LLVM_HEAD_VERSION: "17"
steps:
  - label: "Format"
    commands:
      - "! grep -rnI '[[:blank:]]$' clang/lib clang/include clang/docs || false"

    agents:
      queue: "libcxx-builders"
      os: "linux"
    retry:
      automatic:
        - exit_status: -1  # Agent was lost
          limit: 2
    timeout_in_minutes: 120

  - wait

  - label: "Building clang"
    commands:
      - "mkdir install"
      # We use Release here to avoid including debug information. Otherwise, the clang binary is very large, which
      # is problematic because we need to upload the artifacts for other jobs to use. This may seem like nothing,
      # but with the number of jobs we run daily, this can result in thousands of GB of network I/O.
      - "cmake -S llvm -B build -G Ninja -DCMAKE_CXX_COMPILER_LAUNCHER=\"ccache\" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=install -DLLVM_ENABLE_PROJECTS=\"clang;compiler-rt\""
      - "ninja -C build install-clang install-clang-resource-headers"
      - "ccache -s"
      - "tar -cJvf install.tar.xz install/"
      - "buildkite-agent artifact upload --debug install.tar.xz"
    env:
        CC: "clang-${LLVM_HEAD_VERSION}"
        CXX: "clang++-${LLVM_HEAD_VERSION}"
    agents:
      queue: "libcxx-builders"
      os: "linux"
    retry:
      automatic:
        - exit_status: -1  # Agent was lost
          limit: 2
    timeout_in_minutes: 120

  - wait

  - label: "C++03"
    commands:
      - "buildkite-agent artifact download install.tar.xz ."
      - "tar -xvf install.tar.xz"
      - "export CC=$(pwd)/install/bin/clang"
      - "export CXX=$(pwd)/install/bin/clang++"
      - "chmod +x install/bin/clang install/bin/clang++"
      - "libcxx/utils/ci/run-buildbot generic-cxx03"
    artifact_paths:
      - "**/test-results.xml"
      - "**/crash_diagnostics/*"
    env:
        LLVM_SYMBOLIZER_PATH: "/usr/bin/llvm-symbolizer-${LLVM_HEAD_VERSION}" # TODO: Should we build that from scratch?
        CLANG_CRASH_DIAGNOSTICS_DIR: "crash_diagnostics"
    agents:
      queue: "libcxx-builders"
      os: "linux"
    retry:
      automatic:
        - exit_status: -1  # Agent was lost
          limit: 2
    timeout_in_minutes: 120

  - label: "C++26"
    commands:
      - "buildkite-agent artifact download install.tar.xz ."
      - "tar -xvf install.tar.xz"
      - "export CC=$(pwd)/install/bin/clang"
      - "export CXX=$(pwd)/install/bin/clang++"
      - "chmod +x install/bin/clang install/bin/clang++"
      - "libcxx/utils/ci/run-buildbot generic-cxx26"
    artifact_paths:
      - "**/test-results.xml"
      - "**/crash_diagnostics/*"
    env:
        LLVM_SYMBOLIZER_PATH: "/usr/bin/llvm-symbolizer-${LLVM_HEAD_VERSION}" # TODO: Should we build that from scratch?
        CLANG_CRASH_DIAGNOSTICS_DIR: "crash_diagnostics"
    agents:
      queue: "libcxx-builders"
      os: "linux"
    retry:
      automatic:
        - exit_status: -1  # Agent was lost
          limit: 2
    timeout_in_minutes: 120

  - label: "Modules"
    commands:
      - "buildkite-agent artifact download install.tar.xz ."
      - "tar -xvf install.tar.xz"
      - "export CC=$(pwd)/install/bin/clang"
      - "export CXX=$(pwd)/install/bin/clang++"
      - "chmod +x install/bin/clang install/bin/clang++"
      - "libcxx/utils/ci/run-buildbot generic-modules"
    artifact_paths:
      - "**/test-results.xml"
      - "**/crash_diagnostics/*"
    env:
        LLVM_SYMBOLIZER_PATH: "/usr/bin/llvm-symbolizer-${LLVM_HEAD_VERSION}" # TODO: Should we build that from scratch?
        CLANG_CRASH_DIAGNOSTICS_DIR: "crash_diagnostics"
    agents:
      queue: "libcxx-builders"
      os: "linux"
    retry:
      automatic:
        - exit_status: -1  # Agent was lost
          limit: 2
    timeout_in_minutes: 120