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https://github.com/llvm/llvm-project.git
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ce296f1eba
These changes are mostly pushed by the gnsyncbot directly to main and thus don't go through a PR, but we still test on main to see if main is broken. Given these touch llvm/, they end up burning a decent amount of testing time for no real benefit, so I think it makes sense to exclude them from premerge testing explicitly.
238 lines
8.4 KiB
Python
238 lines
8.4 KiB
Python
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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"""Computes the list of projects that need to be tested from a diff.
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Does some things, spits out a list of projects.
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"""
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from collections.abc import Set
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import pathlib
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import platform
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import sys
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# This mapping lists out the dependencies for each project. These should be
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# direct dependencies. The code will handle transitive dependencies. Some
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# projects might have optional dependencies depending upon how they are built.
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# The dependencies listed here should be the dependencies required for the
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# configuration built/tested in the premerge CI.
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PROJECT_DEPENDENCIES = {
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"llvm": set(),
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"clang": {"llvm"},
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"bolt": {"clang", "lld", "llvm"},
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"clang-tools-extra": {"clang", "llvm"},
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"compiler-rt": {"clang", "lld"},
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"libc": {"clang", "lld"},
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"openmp": {"clang", "lld"},
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"flang": {"llvm", "clang"},
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"lldb": {"llvm", "clang"},
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"libclc": {"llvm", "clang"},
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"lld": {"llvm"},
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"mlir": {"llvm"},
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"polly": {"llvm"},
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}
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# This mapping describes the additional projects that should be tested when a
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# specific project is touched. We enumerate them specifically rather than
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# just invert the dependencies list to give more control over what exactly is
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# tested.
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DEPENDENTS_TO_TEST = {
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"llvm": {
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"bolt",
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"clang",
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"clang-tools-extra",
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"lld",
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"lldb",
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"mlir",
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"polly",
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"flang",
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},
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"lld": {"bolt", "cross-project-tests"},
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# TODO(issues/132795): LLDB should be enabled on clang changes.
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"clang": {"clang-tools-extra", "compiler-rt", "cross-project-tests"},
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"clang-tools-extra": {"libc"},
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"mlir": {"flang"},
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}
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DEPENDENT_RUNTIMES_TO_TEST = {"clang": {"libcxx", "libcxxabi", "libunwind"}}
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EXCLUDE_LINUX = {
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"cross-project-tests", # TODO(issues/132796): Tests are failing.
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"openmp", # https://github.com/google/llvm-premerge-checks/issues/410
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}
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EXCLUDE_WINDOWS = {
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"cross-project-tests", # TODO(issues/132797): Tests are failing.
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"compiler-rt", # TODO(issues/132798): Tests take excessive time.
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"openmp", # TODO(issues/132799): Does not detect perl installation.
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"libc", # No Windows Support.
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"lldb", # TODO(issues/132800): Needs environment setup.
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"bolt", # No Windows Support.
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}
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# These are projects that we should test if the project itself is changed but
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# where testing is not yet stable enough for it to be enabled on changes to
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# dependencies.
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EXCLUDE_DEPENDENTS_WINDOWS = {
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"flang", # TODO(issues/132803): Flang is not stable.
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}
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EXCLUDE_MAC = {
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"bolt",
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"compiler-rt",
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"cross-project-tests",
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"flang",
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"libc",
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"libcxx",
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"libcxxabi",
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"libunwind",
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"lldb",
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"openmp",
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"polly",
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}
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PROJECT_CHECK_TARGETS = {
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"clang-tools-extra": "check-clang-tools",
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"compiler-rt": "check-compiler-rt",
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"cross-project-tests": "check-cross-project",
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"libcxx": "check-cxx",
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"libcxxabi": "check-cxxabi",
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"libunwind": "check-unwind",
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"lldb": "check-lldb",
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"llvm": "check-llvm",
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"clang": "check-clang",
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"bolt": "check-bolt",
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"lld": "check-lld",
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"flang": "check-flang",
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"libc": "check-libc",
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"lld": "check-lld",
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"lldb": "check-lldb",
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"mlir": "check-mlir",
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"openmp": "check-openmp",
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"polly": "check-polly",
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}
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RUNTIMES = {"libcxx", "libcxxabi", "libunwind"}
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def _add_dependencies(projects: Set[str]) -> Set[str]:
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projects_with_dependents = set(projects)
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current_projects_count = 0
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while current_projects_count != len(projects_with_dependents):
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current_projects_count = len(projects_with_dependents)
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for project in list(projects_with_dependents):
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if project not in PROJECT_DEPENDENCIES:
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continue
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projects_with_dependents.update(PROJECT_DEPENDENCIES[project])
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return projects_with_dependents
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def _compute_projects_to_test(modified_projects: Set[str], platform: str) -> Set[str]:
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projects_to_test = set()
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for modified_project in modified_projects:
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# Skip all projects where we cannot run tests.
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if modified_project not in PROJECT_CHECK_TARGETS:
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continue
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if modified_project in RUNTIMES:
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continue
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projects_to_test.add(modified_project)
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if modified_project not in DEPENDENTS_TO_TEST:
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continue
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for dependent_project in DEPENDENTS_TO_TEST[modified_project]:
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if (
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platform == "Windows"
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and dependent_project in EXCLUDE_DEPENDENTS_WINDOWS
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):
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continue
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projects_to_test.add(dependent_project)
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if platform == "Linux":
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for to_exclude in EXCLUDE_LINUX:
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if to_exclude in projects_to_test:
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projects_to_test.remove(to_exclude)
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elif platform == "Windows":
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for to_exclude in EXCLUDE_WINDOWS:
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if to_exclude in projects_to_test:
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projects_to_test.remove(to_exclude)
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elif platform == "Darwin":
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for to_exclude in EXCLUDE_MAC:
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if to_exclude in projects_to_test:
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projects_to_test.remove(to_exclude)
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else:
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raise ValueError("Unexpected platform.")
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return projects_to_test
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def _compute_projects_to_build(projects_to_test: Set[str]) -> Set[str]:
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return _add_dependencies(projects_to_test)
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def _compute_project_check_targets(projects_to_test: Set[str]) -> Set[str]:
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check_targets = set()
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for project_to_test in projects_to_test:
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if project_to_test not in PROJECT_CHECK_TARGETS:
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continue
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check_targets.add(PROJECT_CHECK_TARGETS[project_to_test])
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return check_targets
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def _compute_runtimes_to_test(projects_to_test: Set[str]) -> Set[str]:
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runtimes_to_test = set()
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for project_to_test in projects_to_test:
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if project_to_test not in DEPENDENT_RUNTIMES_TO_TEST:
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continue
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runtimes_to_test.update(DEPENDENT_RUNTIMES_TO_TEST[project_to_test])
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return runtimes_to_test
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def _compute_runtime_check_targets(runtimes_to_test: Set[str]) -> Set[str]:
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check_targets = set()
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for runtime_to_test in runtimes_to_test:
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check_targets.add(PROJECT_CHECK_TARGETS[runtime_to_test])
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return check_targets
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def _get_modified_projects(modified_files: list[str]) -> Set[str]:
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modified_projects = set()
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for modified_file in modified_files:
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path_parts = pathlib.Path(modified_file).parts
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# Exclude files in the docs directory. They do not impact an test
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# targets and there is a separate workflow used for ensuring the
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# documentation builds.
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if len(path_parts) > 2 and path_parts[1] == "docs":
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continue
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# Exclude files for the gn build. We do not test it within premerge
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# and changes occur often enough that they otherwise take up
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# capacity.
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if len(path_parts) > 3 and path_parts[:3] == ("llvm", "utils", "gn"):
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continue
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modified_projects.add(pathlib.Path(modified_file).parts[0])
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return modified_projects
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def get_env_variables(modified_files: list[str], platform: str) -> Set[str]:
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modified_projects = _get_modified_projects(modified_files)
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projects_to_test = _compute_projects_to_test(modified_projects, platform)
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projects_to_build = _compute_projects_to_build(projects_to_test)
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projects_check_targets = _compute_project_check_targets(projects_to_test)
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runtimes_to_test = _compute_runtimes_to_test(projects_to_test)
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runtimes_check_targets = _compute_runtime_check_targets(runtimes_to_test)
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# We use a semicolon to separate the projects/runtimes as they get passed
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# to the CMake invocation and thus we need to use the CMake list separator
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# (;). We use spaces to separate the check targets as they end up getting
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# passed to ninja.
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return {
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"projects_to_build": ";".join(sorted(projects_to_build)),
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"project_check_targets": " ".join(sorted(projects_check_targets)),
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"runtimes_to_build": ";".join(sorted(runtimes_to_test)),
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"runtimes_check_targets": " ".join(sorted(runtimes_check_targets)),
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}
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if __name__ == "__main__":
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current_platform = platform.system()
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if len(sys.argv) == 2:
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current_platform = sys.argv[1]
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env_variables = get_env_variables(sys.stdin.readlines(), current_platform)
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for env_variable in env_variables:
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print(f"{env_variable}='{env_variables[env_variable]}'")
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