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369 lines (315 loc) · 11.2 KB
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"""Determine which GitHub Actions workflows to run.
Called by ``.github/workflows/reusable-context.yml``.
We only want to run tests on PRs when related files are changed,
or when someone triggers a manual workflow run.
This improves developer experience by not doing (slow)
unnecessary work in GHA, and saves CI resources.
"""
from __future__ import annotations
import os
import subprocess
from dataclasses import dataclass, fields
from pathlib import Path
TYPE_CHECKING = False
if TYPE_CHECKING:
from collections.abc import Set
GITHUB_DEFAULT_BRANCH = os.environ["GITHUB_DEFAULT_BRANCH"]
GITHUB_WORKFLOWS_PATH = Path(".github/workflows")
RUN_TESTS_IGNORE = frozenset({
Path("Tools/check-c-api-docs/ignored_c_api.txt"),
Path(".github/CODEOWNERS"),
Path(".pre-commit-config.yaml"),
Path(".ruff.toml"),
Path("mypy.ini"),
})
UNIX_BUILD_SYSTEM_FILE_NAMES = frozenset({
Path("aclocal.m4"),
Path("config.guess"),
Path("config.sub"),
Path("configure"),
Path("configure.ac"),
Path("install-sh"),
Path("Makefile.pre.in"),
Path("Modules/makesetup"),
Path("Modules/Setup"),
Path("Modules/Setup.bootstrap.in"),
Path("Modules/Setup.stdlib.in"),
Path("Tools/build/regen-configure.sh"),
})
SUFFIXES_C_OR_CPP = frozenset({".c", ".h", ".cpp"})
SUFFIXES_DOCUMENTATION = frozenset({".rst", ".md"})
ANDROID_DIRS = frozenset({"Android"})
EMSCRIPTEN_DIRS = frozenset({Path("Platforms", "emscripten")})
IOS_DIRS = frozenset({"Apple", "iOS"})
MACOS_DIRS = frozenset({"Mac"})
WASI_DIRS = frozenset({Path("Platforms", "WASI")})
LIBRARY_FUZZER_PATHS = frozenset({
# All C/CPP fuzzers.
Path("configure"),
Path(".github/workflows/reusable-cifuzz.yml"),
# ast
Path("Lib/ast.py"),
Path("Python/ast.c"),
# configparser
Path("Lib/configparser.py"),
# csv
Path("Lib/csv.py"),
Path("Modules/_csv.c"),
# decode
Path("Lib/encodings/"),
Path("Modules/_codecsmodule.c"),
Path("Modules/cjkcodecs/"),
Path("Modules/unicodedata.c"),
Path("Modules/unicodedata_db.h"),
# difflib
Path("Lib/difflib.py"),
# email
Path("Lib/email/"),
# html
Path("Lib/html/"),
Path("Lib/_markupbase.py"),
# http.client
Path("Lib/http/client.py"),
# json
Path("Lib/json/"),
Path("Modules/_json.c"),
# plist
Path("Lib/plistlib.py"),
# re
Path("Lib/re/"),
Path("Modules/_sre/"),
# tarfile
Path("Lib/tarfile.py"),
# tomllib
Path("Lib/tomllib/"),
# xml
Path("Lib/xml/"),
Path("Lib/_markupbase.py"),
Path("Modules/expat/"),
Path("Modules/pyexpat.c"),
# zipfile
Path("Lib/zipfile/"),
# zoneinfo
Path("Lib/zoneinfo/"),
Path("Modules/_zoneinfo.c"),
})
@dataclass(kw_only=True, slots=True)
class Outputs:
run_android: bool = False
run_ci_fuzz: bool = False
run_ci_fuzz_stdlib: bool = False
run_docs: bool = False
run_emscripten: bool = False
run_ios: bool = False
run_macos: bool = False
run_tests: bool = False
run_ubuntu: bool = False
run_wasi: bool = False
run_windows_msi: bool = False
run_windows_tests: bool = False
def compute_changes() -> None:
target_ref, head_ref = git_refs()
if os.environ.get("GITHUB_EVENT_NAME", "") == "pull_request":
# Getting changed files only makes sense on a pull request
files = get_changed_files(target_ref, head_ref)
outputs = process_changed_files(files)
else:
# Otherwise, just run the tests
outputs = Outputs(
run_android=True,
run_emscripten=True,
run_ios=True,
run_macos=True,
run_tests=True,
run_ubuntu=True,
run_wasi=True,
run_windows_tests=True,
)
target_branch = target_ref.removeprefix("origin/")
outputs = process_target_branch(outputs, target_branch)
if outputs.run_tests:
print("Run tests")
if outputs.run_windows_tests:
print("Run Windows tests")
if outputs.run_ci_fuzz:
print("Run CIFuzz tests")
else:
print("Branch too old for CIFuzz tests; or no C files were changed")
if outputs.run_ci_fuzz_stdlib:
print("Run CIFuzz tests for stdlib")
else:
print("Branch too old for CIFuzz tests; or no stdlib files were changed")
if outputs.run_docs:
print("Build documentation")
if outputs.run_windows_msi:
print("Build Windows MSI")
print(outputs)
write_github_output(outputs)
def git_refs() -> tuple[str, str]:
target_ref = os.environ.get("CCF_TARGET_REF", "")
target_ref = target_ref.removeprefix("refs/heads/")
print(f"target ref: {target_ref!r}")
head_ref = os.environ.get("CCF_HEAD_REF", "")
head_ref = head_ref.removeprefix("refs/heads/")
print(f"head ref: {head_ref!r}")
return f"origin/{target_ref}", head_ref
def get_changed_files(
ref_a: str = GITHUB_DEFAULT_BRANCH, ref_b: str = "HEAD"
) -> Set[Path]:
"""List the files changed between two Git refs, filtered by change type."""
args = ("git", "diff", "--name-only", f"{ref_a}...{ref_b}", "--")
print(*args)
changed_files_result = subprocess.run(
args, stdout=subprocess.PIPE, check=True, encoding="utf-8"
)
changed_files = changed_files_result.stdout.strip().splitlines()
return frozenset(map(Path, filter(None, map(str.strip, changed_files))))
def get_file_platform(file: Path) -> str | None:
if not file.parts:
return None
first_part = file.parts[0]
if first_part in MACOS_DIRS:
return "macos"
if first_part in IOS_DIRS:
return "ios"
if first_part in ANDROID_DIRS:
return "android"
if len(file.parts) >= 2 and Path(*file.parts[:2]) in EMSCRIPTEN_DIRS:
return "emscripten"
if len(file.parts) >= 2 and Path(*file.parts[:2]) in WASI_DIRS:
return "wasi"
return None
def is_fuzzable_library_file(file: Path) -> bool:
return any(
(file.is_relative_to(needs_fuzz) and needs_fuzz.is_dir())
or (file == needs_fuzz and file.is_file())
for needs_fuzz in LIBRARY_FUZZER_PATHS
)
def process_changed_files(changed_files: Set[Path]) -> Outputs:
run_tests = False
run_ci_fuzz = False
run_ci_fuzz_stdlib = False
run_docs = False
run_windows_tests = False
run_windows_msi = False
platforms_changed = set()
has_platform_specific_change = True
for file in changed_files:
# Documentation files
doc_or_misc = file.parts[0] in {"Doc", "Misc"}
doc_file = file.suffix in SUFFIXES_DOCUMENTATION or doc_or_misc
if file.parent == GITHUB_WORKFLOWS_PATH:
if file.name in ("build.yml", "reusable-cifuzz.yml"):
run_tests = run_ci_fuzz = run_ci_fuzz_stdlib = run_windows_tests = True
has_platform_specific_change = False
continue
if file.name in ("reusable-docs.yml", "reusable-check-html-ids.yml"):
run_docs = True
continue
if file.name == "reusable-windows.yml":
run_tests = True
run_windows_tests = True
continue
if file.name == "reusable-windows-msi.yml":
run_windows_msi = True
continue
if file.name == "reusable-macos.yml":
run_tests = True
platforms_changed.add("macos")
continue
if file.name == "reusable-emscripten.yml":
run_tests = True
platforms_changed.add("emscripten")
continue
if file.name == "reusable-wasi.yml":
run_tests = True
platforms_changed.add("wasi")
continue
if not doc_file and file not in RUN_TESTS_IGNORE:
run_tests = True
platform = get_file_platform(file)
if platform is not None:
platforms_changed.add(platform)
else:
has_platform_specific_change = False
if file not in UNIX_BUILD_SYSTEM_FILE_NAMES:
run_windows_tests = True
# The fuzz tests are pretty slow so they are executed only for PRs
# changing relevant files.
if file.suffix in SUFFIXES_C_OR_CPP:
run_ci_fuzz = True
if file.parts[:2] in {
("configure",),
("Modules", "_xxtestfuzz"),
}:
run_ci_fuzz = True
if not run_ci_fuzz_stdlib and is_fuzzable_library_file(file):
run_ci_fuzz_stdlib = True
# Check for changed documentation-related files
if doc_file:
run_docs = True
# Check for changed MSI installer-related files
if file.parts[:2] == ("Tools", "msi"):
run_windows_msi = True
# Check which platform specific tests to run
if run_tests:
if not has_platform_specific_change or not platforms_changed:
run_android = True
run_emscripten = True
run_ios = True
run_macos = True
run_ubuntu = True
run_wasi = True
else:
run_android = "android" in platforms_changed
run_emscripten = "emscripten" in platforms_changed
run_ios = "ios" in platforms_changed
run_macos = "macos" in platforms_changed
run_ubuntu = False
run_wasi = "wasi" in platforms_changed
else:
run_android = False
run_emscripten = False
run_ios = False
run_macos = False
run_ubuntu = False
run_wasi = False
return Outputs(
run_android=run_android,
run_ci_fuzz=run_ci_fuzz,
run_ci_fuzz_stdlib=run_ci_fuzz_stdlib,
run_docs=run_docs,
run_emscripten=run_emscripten,
run_ios=run_ios,
run_macos=run_macos,
run_tests=run_tests,
run_ubuntu=run_ubuntu,
run_wasi=run_wasi,
run_windows_msi=run_windows_msi,
run_windows_tests=run_windows_tests,
)
def process_target_branch(outputs: Outputs, git_branch: str) -> Outputs:
if not git_branch:
outputs.run_tests = True
# CIFuzz / OSS-Fuzz compatibility with older branches may be broken.
if git_branch != GITHUB_DEFAULT_BRANCH:
outputs.run_ci_fuzz = False
if os.environ.get("GITHUB_EVENT_NAME", "").lower() == "workflow_dispatch":
outputs.run_docs = True
outputs.run_windows_msi = True
return outputs
def write_github_output(outputs: Outputs) -> None:
# https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/store-information-in-variables#default-environment-variables
# https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/workflow-commands-for-github-actions#setting-an-output-parameter
if "GITHUB_OUTPUT" not in os.environ:
print("GITHUB_OUTPUT not defined!")
return
with open(os.environ["GITHUB_OUTPUT"], "a", encoding="utf-8") as f:
for field in fields(outputs):
name = field.name.replace("_", "-")
val = bool_lower(getattr(outputs, field.name))
f.write(f"{name}={val}\n")
def bool_lower(value: bool, /) -> str:
return "true" if value else "false"
if __name__ == "__main__":
compute_changes()
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