llvm-premerge-checks/scripts/pipeline_main.py

#!/usr/bin/env python3
# Copyright 2020 Google LLC
#
# Licensed under the the Apache License v2.0 with LLVM Exceptions (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://llvm.org/LICENSE.txt
#
# 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.

# Script runs in checked out llvm-project directory.

from choose_projects import ChooseProjects
from steps import generic_linux, generic_windows, from_shell_output, extend_steps_env, bazel
from typing import Dict
import git
import git_utils
import os
import yaml

steps_generators = [
    '${BUILDKITE_BUILD_CHECKOUT_PATH}/libcxx/utils/ci/buildkite-pipeline-snapshot.sh',
]

if __name__ == '__main__':
    scripts_refspec = os.getenv("ph_scripts_refspec", "main")
    no_cache = os.getenv('ph_no_cache') is not None
    log_level = os.getenv('ph_log_level', 'WARNING')
    notify_emails = list(filter(None, os.getenv('ph_notify_emails', '').split(',')))
    # Syncing LLVM fork so any pipelines started from upstream llvm-project
    # but then triggered a build on fork will observe the commit.
    repo = git_utils.initLlvmFork(os.path.join(os.getenv('BUILDKITE_BUILD_PATH', ''), 'llvm-project-fork'))
    git_utils.syncRemotes(repo, 'upstream', 'origin')
    steps = []

    env: Dict[str, str] = {}
    for e in os.environ:
        if e.startswith('ph_'):
            env[e] = os.getenv(e, '')
    repo = git.Repo('.')

    cp = ChooseProjects(None)
    linux_projects = cp.get_all_enabled_projects('linux')
    steps.extend(generic_linux(os.getenv('ph_projects', ';'.join(linux_projects)), check_diff=False))
    windows_projects = cp.get_all_enabled_projects('windows')
    steps.extend(generic_windows(os.getenv('ph_projects', ';'.join(windows_projects))))
    steps.extend(bazel([], force=True))
    if os.getenv('ph_skip_generated') is None:
        # BUILDKITE_COMMIT might be an alias, e.g. "HEAD". Resolve it to make the build hermetic.
        env['BUILDKITE_COMMIT'] = os.getenv('BUILDKITE_COMMIT')
        if env['BUILDKITE_COMMIT'] == "HEAD":
            env['BUILDKITE_COMMIT'] = repo.head.commit.hexsha
        env['BUILDKITE_BRANCH'] = os.getenv('BUILDKITE_BRANCH')
        env['BUILDKITE_MESSAGE'] = os.getenv('BUILDKITE_MESSAGE')
        for gen in steps_generators:
            steps.extend(from_shell_output(gen, env=env))

    notify = []
    for e in notify_emails:
        notify.append({'email': e})
    extend_steps_env(steps, env)
    print(yaml.dump({'steps': steps, 'notify': notify}))