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rustfs/scripts/ci_gate.py
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#!/usr/bin/env python3
"""Select safe documentation-only CI and verify the complete required job set."""
from __future__ import annotations
import json
import os
from pathlib import Path, PurePosixPath
import re
import subprocess
import sys
import tempfile
import unittest
ROOT = Path(__file__).resolve().parent.parent
ALWAYS_JOBS = ("classify-changes", "typos", "quick-checks")
CODE_JOBS = (
"test-and-lint", "test-ilm-integration-serial", "test-and-lint-rio-v2",
"connect-short-credential-boundary", "test-and-lint-protocols",
"build-rustfs-debug-binary", "uring-integration", "e2e-tests",
"s3-implemented-tests", "s3-lifecycle-behavior-tests",
)
OPTIONAL_JOBS = ("build-rustfs-debug-binary-rio-v2", "e2e-tests-rio-v2", "e2e-full")
NON_VALIDATION_JOBS = {"required-checks", "cancel-closed-pr-runs", "alert-on-failure"}
def documentation_path(path: str) -> bool:
parts = PurePosixPath(path).parts
if not parts or path.startswith("/") or any(part in (".", "..") for part in parts) or any(ord(c) < 32 for c in path):
return False
if parts[-1] == "AGENTS.md":
return True
if len(parts) == 1 and (path.endswith(".md") or path == "LICENSE" or path.startswith("LICENSE-")):
return True
if path.startswith(("docs/", ".agents/skills/")) and path.endswith(".md"):
return True
return path.startswith("docs/") and path.endswith((".png", ".jpg", ".svg"))
def select_mode(event: str, base: str, head: str, root: Path) -> str:
if event != "pull_request" or not all(re.fullmatch(r"[0-9a-f]{40}", sha) for sha in (base, head)):
return "full"
try:
changed = subprocess.check_output(
["git", "diff", "--no-ext-diff", "--no-textconv", "--no-renames", "--name-only", "-z", base, head, "--"],
cwd=root, stderr=subprocess.PIPE,
).decode("utf-8")
except (subprocess.CalledProcessError, UnicodeError):
return "full"
paths = changed.rstrip("\0").split("\0") if changed else []
return "docs" if paths and all(documentation_path(path) for path in paths) else "full"
def expected_results(mode: str, event: str, ref: str) -> dict[str, str]:
if event not in ("pull_request", "push", "merge_group", "schedule", "workflow_dispatch"):
raise ValueError(f"unsupported CI event: {event!r}")
if mode not in ("docs", "full") or (mode == "docs" and event != "pull_request"):
raise ValueError(f"invalid CI selection: {mode!r} for {event!r}")
expected = {job: "success" for job in ALWAYS_JOBS}
expected.update({job: "success" if mode == "full" else "skipped" for job in CODE_JOBS})
rio = mode == "full" and event in ("schedule", "workflow_dispatch")
expected.update({job: "success" if rio else "skipped" for job in OPTIONAL_JOBS[:2]})
full = mode == "full" and (event in ("merge_group", "workflow_dispatch") or (event == "push" and ref == "refs/heads/main"))
expected["e2e-full"] = "success" if full else "skipped"
return expected
def verify_results(needs: object, event: str, ref: str) -> list[str]:
if not isinstance(needs, dict):
return ["needs must be a job-result object"]
selection = needs.get("classify-changes", {})
outputs = selection.get("outputs", {}) if isinstance(selection, dict) else {}
mode = outputs.get("mode") if isinstance(outputs, dict) else None
try:
expected = expected_results(mode, event, ref)
except ValueError as error:
return [str(error)]
errors = []
if set(needs) != set(expected):
errors.append(f"job set differs: missing={sorted(set(expected) - set(needs))}, unexpected={sorted(set(needs) - set(expected))}")
for job, required in expected.items():
result = needs.get(job, {})
actual = result.get("result") if isinstance(result, dict) else None
if actual != required:
errors.append(f"{job}: expected {required}, got {actual!r}")
return errors
def check_workflow(root: Path) -> list[str]:
# Reuse the repository's canonical-indentation checker; actionlint validates YAML syntax.
from check_test_wiring import yaml_block, yaml_scalar_continues
errors = []
lines = (root / ".github/workflows/ci.yml").read_text().splitlines()
jobs = yaml_block(lines, "jobs", 0) or []
names = set()
for index, line in enumerate(jobs):
if not re.match(r"^ \S", line) or line.lstrip().startswith("#"):
continue
header = re.fullmatch(r''' (["']?)([A-Za-z_][A-Za-z0-9_-]*)\1\s*:\s*(?:#.*)?''', line)
if header is None:
errors.append("CI job declarations must use single-line job IDs")
continue
name = header[2]
if name in names:
errors.append(f"duplicate CI job ID: {name}")
names.add(name)
jobs[index] = f" {name}:"
required = set(ALWAYS_JOBS + CODE_JOBS + OPTIONAL_JOBS)
if names - NON_VALIDATION_JOBS != required:
errors.append("CI verification jobs and the required gate contract differ")
for job in required:
block = yaml_block(jobs, job, 2) or []
if any(re.match(r"\s+(?:- )?[\"']?continue-on-error[\"']?\s*:", line) for line in block):
errors.append(f"{job} cannot convert a validation failure into success")
gate = yaml_block(jobs, "required-checks", 2) or []
def scalar(block, key, indent):
prefix = " " * indent + key + ": "
matches = [index for index, line in enumerate(block) if line.startswith(prefix)]
if len(matches) != 1:
return None
index = matches[0]
if yaml_scalar_continues(block, index, indent):
return None
return block[index][len(prefix):]
display_names = {}
for job in names:
block = [re.sub(r'''^ (?:'name'|"name")\s*:\s*''', " name: ", line)
for line in yaml_block(jobs, job, 2) or []]
value = scalar(block, "name", 4)
display = re.fullmatch(r'''(?:"([^"\\]*)"|'([^']*)'|([^'"#][^#]*?))(?:\s+#.*)?\s*''', (value or "").strip())
if display is None or (display[3] is not None and display[3].startswith(tuple("|>*&!{[?"))):
errors.append(f"{job} must use a verifiable single-line display name")
continue
name = next(value for value in display.groups() if value is not None)
if "${{" in name and (job != "test-and-lint-protocols" or name != "Test and Lint (${{ matrix.features.name }})"):
errors.append(f"{job} has an unverifiable dynamic display name")
display_names[job] = name
dependencies = yaml_block(gate, "needs", 4) or []
declared = [line.strip().removeprefix("- ") for line in dependencies if line.strip()]
if set(declared) != required or len(declared) != len(required):
errors.append("required-checks must directly depend on every verification job exactly once")
if display_names.get("required-checks") != "Test and Lint" or list(display_names.values()).count("Test and Lint") != 1:
errors.append("Test and Lint must uniquely name the aggregate gate")
if scalar(gate, "if", 4) != "always() && (github.event_name != 'pull_request' || github.event.action != 'closed')":
errors.append("required-checks must run after failed or skipped dependencies")
if scalar(gate, "shell", 8) != "bash" or scalar(gate, "run", 8) != "python3 scripts/ci_gate.py verify" or scalar(gate, "CI_NEEDS", 10) != "${{ toJSON(needs) }}":
errors.append("required-checks must verify the actual needs results")
if any(re.match(r'''\s+(?:- )?(?:["']?continue-on-error["']?\s*:|["']?if["']?\s*:)''', line) and not line.startswith(" if:") for line in gate):
errors.append("required-checks cannot ignore failures")
pr = yaml_block(lines, "pull_request", 2) or []
if any(line.strip().startswith(("paths:", "paths-ignore:")) for line in pr):
errors.append("all pull requests must enter the single CI workflow")
if (root / ".github/workflows/ci-docs-only.yml").exists():
errors.append("the duplicate required-status companion must be removed")
return errors
class SelfTests(unittest.TestCase):
def test_documentation_paths_do_not_hide_build_or_fixture_changes(self):
for path in ("README.md", "AGENTS.md", "crates/utils/AGENTS.md", "docs/testing/README.md", "docs/diagram.svg", ".agents/skills/example/SKILL.md"):
self.assertTrue(documentation_path(path), path)
for path in ("", "src/lib.rs", "crates/foo/tests/fixtures/data.md", "Cargo.lock", "build.rs", "deploy/chart.yaml", ".github/workflows/ci.yml", "scripts/dev_build.sh", "assets/logo.png", "docs/test.rs", "README.md\n", "../README.md"):
self.assertFalse(documentation_path(path), path)
def test_git_range_includes_deleted_source_and_rename_origins(self):
with tempfile.TemporaryDirectory() as directory:
root = Path(directory)
def git(*args):
return subprocess.check_output(["git", "-c", "core.hooksPath=/dev/null", "-c", "user.name=CI Test", "-c", "user.email=ci@example.invalid", *args], cwd=root, stderr=subprocess.PIPE).decode().strip()
git("init", "-q")
(root / "server.rs").write_text("fn main() {}\n")
(root / "README.md").write_text("old\n")
git("add", "."); git("commit", "-qm", "base")
base = git("rev-parse", "HEAD")
(root / "README.md").write_text("new\n")
git("add", "."); git("commit", "-qm", "docs")
docs = git("rev-parse", "HEAD")
self.assertEqual(select_mode("pull_request", base, docs, root), "docs")
(root / "server.rs").rename(root / "server.md")
git("add", "-A"); git("commit", "-qm", "rename source")
head = git("rev-parse", "HEAD")
self.assertEqual(select_mode("pull_request", base, head, root), "full")
self.assertEqual(select_mode("pull_request", docs, docs, root), "full")
self.assertEqual(select_mode("pull_request", "0" * 40, head, root), "full")
self.assertEqual(select_mode("pull_request", "--output=bad", head, root), "full")
self.assertEqual(select_mode("merge_group", base, docs, root), "full")
def test_event_contract_requires_complete_candidate_and_optional_lanes(self):
ordinary = expected_results("full", "pull_request", "refs/pull/1/merge")
self.assertEqual({job for job, state in ordinary.items() if state == "skipped"}, set(OPTIONAL_JOBS))
docs = expected_results("docs", "pull_request", "refs/pull/1/merge")
self.assertEqual({job for job, state in docs.items() if state == "success"}, set(ALWAYS_JOBS))
for event in ("schedule", "workflow_dispatch", "merge_group", "push"):
result = expected_results("full", event, "refs/heads/main")
self.assertEqual(result["e2e-full"], "skipped" if event == "schedule" else "success")
self.assertEqual(result["e2e-tests-rio-v2"], "success" if event in ("schedule", "workflow_dispatch") else "skipped")
with self.assertRaises(ValueError):
expected_results("docs", event, "refs/heads/main")
def test_every_wrong_result_missing_job_or_selection_fails_closed(self):
for mode, event in (("full", "pull_request"), ("docs", "pull_request"), ("full", "schedule"), ("full", "workflow_dispatch"), ("full", "merge_group")):
good = {job: {"result": value} for job, value in expected_results(mode, event, "refs/heads/main").items()}
good["classify-changes"]["outputs"] = {"mode": mode}
self.assertEqual(verify_results(good, event, "refs/heads/main"), [])
for job in good:
for value in ("success", "skipped", "failure", "cancelled", "neutral", "", None):
if value == good[job]["result"]:
continue
with self.subTest(mode=mode, event=event, job=job, result=value):
bad = {**good, job: {**good[job], "result": value}}
self.assertTrue(verify_results(bad, event, "refs/heads/main"))
self.assertTrue(verify_results({key: value for key, value in good.items() if key != job}, event, "refs/heads/main"))
missing_result = {key: value for key, value in good[job].items() if key != "result"}
self.assertTrue(verify_results({**good, job: missing_result}, event, "refs/heads/main"))
self.assertTrue(verify_results({**good, "unknown-job": {"result": "success"}}, event, "refs/heads/main"))
for selection in ({}, {"mode": ""}, {"mode": True}, []):
bad = {**good, "classify-changes": {"result": "success", "outputs": selection}}
self.assertTrue(verify_results(bad, event, "refs/heads/main"))
def test_repository_wiring_and_missing_dependency_regression(self):
self.assertEqual(check_workflow(ROOT), [])
with tempfile.TemporaryDirectory() as directory:
root = Path(directory)
(root / ".github/workflows").mkdir(parents=True)
source = (ROOT / ".github/workflows/ci.yml").read_text()
path = root / ".github/workflows/ci.yml"
for job in ALWAYS_JOBS + CODE_JOBS + OPTIONAL_JOBS:
before, gate = source.split(" required-checks:\n", 1)
path.write_text(before + " required-checks:\n" + gate.replace(f" - {job}\n", "", 1))
self.assertTrue(check_workflow(root), job)
for old, new in (
("run: python3 scripts/ci_gate.py verify", "run: python3 scripts/ci_gate.py verify || true"),
("run: python3 scripts/ci_gate.py verify", "run: python3 scripts/ci_gate.py verify\n || true"),
("CI_NEEDS: ${{ toJSON(needs) }}", "CI_NEEDS: '{}'"),
("name: Test and Lint\n", "name: Unrequired result\n"),
(" shell: bash\n run: python3 scripts/ci_gate.py verify", " shell: echo {0}\n run: python3 scripts/ci_gate.py verify"),
(" shell: bash\n run: python3 scripts/ci_gate.py verify", " run: python3 scripts/ci_gate.py verify"),
(" run: python3 scripts/ci_gate.py verify", ' "if": false\n run: python3 scripts/ci_gate.py verify'),
):
path.write_text(source.replace(old, new))
self.assertTrue(check_workflow(root), new)
for job in ALWAYS_JOBS + CODE_JOBS + OPTIONAL_JOBS:
for field in ("continue-on-error", '"continue-on-error"', "'continue-on-error'"):
path.write_text(source.replace(f" {job}:\n", f" {job}:\n {field}: true\n", 1))
self.assertTrue(check_workflow(root), (job, field))
before, block = source.split(f" {job}:\n", 1)
block = block.replace(" - name:", f" - {field}: true\n name:", 1)
path.write_text(before + f" {job}:\n" + block)
self.assertTrue(check_workflow(root), (job, field, "step"))
path.write_text(source + "\n cancel-after-test-and-lint-failure:\n runs-on: ubuntu-latest\n")
self.assertTrue(check_workflow(root))
def test_job_ids_and_display_names_cannot_hide_validation(self):
with tempfile.TemporaryDirectory() as directory:
root = Path(directory)
(root / ".github/workflows").mkdir(parents=True)
source = (ROOT / ".github/workflows/ci.yml").read_text()
path = root / ".github/workflows/ci.yml"
for header in ("typos", "'typos'", '"typos"'):
path.write_text(source.replace(" typos:\n", f" {header}: # spelling\n"))
self.assertEqual(check_workflow(root), [], header)
for name in ("Test and Lint # required", "'Test and Lint'", '"Test and Lint" # required'):
path.write_text(source.replace(" name: Test and Lint\n", f" name: {name}\n"))
self.assertEqual(check_workflow(root), [], name)
for key in ("'name'", '"name"'):
path.write_text(source.replace(" name: Typos\n", f" {key}: Typos\n"))
self.assertEqual(check_workflow(root), [], key)
for header in ("new_test", "NewTest", "_new_test", "'new_test'", '"new_test"', '"new\\u005ftest"'):
path.write_text(source + f"\n {header}:\n name: New test\n runs-on: ubuntu-latest\n steps:\n - run: exit 1\n")
self.assertTrue(check_workflow(root), header)
path.write_text(source + "\n 'typos':\n name: Duplicate\n runs-on: ubuntu-latest\n steps:\n - run: exit 1\n")
self.assertIn("duplicate CI job ID: typos", check_workflow(root))
for name in (
"Test and Lint", "Test and Lint # duplicate", "'Test and Lint'",
'"Test and Lint" # duplicate', '"Test\\u0020and Lint"',
">-\n Test and Lint", "|-\n Test and Lint", "Test and\n Lint",
"*required_name", "&required_name Test and Lint", "!!str Test and Lint",
"${{ 'Test and Lint' }}", '"${{ github.event.inputs.check_name }}"',
):
path.write_text(source.replace(" name: Typos\n", f" name: {name}\n"))
self.assertTrue(check_workflow(root), name)
path.write_text(source.replace(" name: Typos\n", ""))
self.assertIn("typos must use a verifiable single-line display name", check_workflow(root))
def test_verify_command_preserves_failures(self):
good = {job: {"result": value} for job, value in expected_results("full", "pull_request", "refs/pull/1/merge").items()}
good["classify-changes"]["outputs"] = {"mode": "full"}
failed = {**good, "e2e-tests": {"result": "failure"}}
for needs, code in ((json.dumps(good), 0), (json.dumps(failed), 1), ("{}", 1), ("{", 1)):
with self.subTest(needs=needs):
env = dict(os.environ, CI_NEEDS=needs, GITHUB_EVENT_NAME="pull_request", GITHUB_REF="refs/pull/1/merge")
result = subprocess.run([sys.executable, str(Path(__file__).resolve()), "verify"], env=env, capture_output=True, text=True)
self.assertEqual(result.returncode, code, result.stderr)
self.assertIn("ERROR:" if code else "CI contract passed", result.stderr if code else result.stdout)
def test_actual_selector_bootstrap_uses_base_policy_and_fails_closed(self):
from check_test_wiring import yaml_block
jobs = yaml_block((ROOT / ".github/workflows/ci.yml").read_text().splitlines(), "jobs", 0)
selector = yaml_block(jobs, "classify-changes", 2)
body = "\n".join(line[10:] for line in selector[selector.index(" run: |") + 1:])
for event, changed, base_sha, available, broken, expected in (
("pull_request", "README.md", "b" * 40, True, False, "docs"),
("pull_request", "src/server.rs", "b" * 40, True, False, "full"),
("pull_request", "README.md", "b" * 40, False, False, "full"),
("merge_group", "README.md", "b" * 40, False, False, "full"),
("pull_request", "README.md", "b" * 40, True, True, None),
("pull_request", "README.md", "", True, True, "full"),
):
with self.subTest(event=event, changed=changed, available=available, broken=broken), tempfile.TemporaryDirectory() as directory:
root = Path(directory)
(root / "scripts").mkdir()
(root / "scripts/ci_gate.py").write_text("raise SystemExit(71)\n")
(root / "python3").symlink_to(sys.executable)
base = root / "base-policy.py"
base.write_text("raise SystemExit(29)\n" if broken else Path(__file__).read_text())
git = root / "git"
git.write_text('''#!/bin/sh
if [ "$1" = show ]; then
[ "$2" = "$CI_BASE_SHA:scripts/ci_gate.py" ] || exit 19
[ "$BASE_AVAILABLE" = yes ] || exit 128
cat "$BASE_POLICY"
elif [ "$1" = diff ]; then
printf '%s\\0' "$CHANGED_PATH"
else
exit 20
fi
''')
git.chmod(0o755)
output = root / "output"
output.touch()
env = dict(os.environ, GITHUB_EVENT_NAME=event, CI_BASE_SHA=base_sha, GITHUB_SHA="c" * 40,
RUNNER_TEMP=str(root), GITHUB_OUTPUT=str(output), BASE_POLICY=str(base),
BASE_AVAILABLE="yes" if available else "no", CHANGED_PATH=changed,
PATH=f"{root}{os.pathsep}{os.environ['PATH']}")
result = subprocess.run(["bash", "--noprofile", "--norc", "-e", "-o", "pipefail", "-c", body], cwd=root, env=env, capture_output=True, text=True)
self.assertEqual(result.returncode, 29 if expected is None else 0, result.stderr)
self.assertEqual(output.read_text(), "" if expected is None else f"mode={expected}\n")
def main() -> int:
if sys.argv[1:] == ["--self-test"]:
return not unittest.TextTestRunner(verbosity=2).run(unittest.defaultTestLoader.loadTestsFromTestCase(SelfTests)).wasSuccessful()
if sys.argv[1:] == ["select"]:
mode = select_mode(os.environ.get("GITHUB_EVENT_NAME", ""), os.environ.get("CI_BASE_SHA", ""), os.environ.get("GITHUB_SHA", ""), Path.cwd())
with open(os.environ["GITHUB_OUTPUT"], "a") as output:
output.write(f"mode={mode}\n")
print(f"CI selection: {mode}")
return 0
if sys.argv[1:] == ["verify"]:
try:
errors = verify_results(json.loads(os.environ["CI_NEEDS"]), os.environ.get("GITHUB_EVENT_NAME", ""), os.environ.get("GITHUB_REF", ""))
except (KeyError, ValueError) as error:
errors = [str(error)]
elif sys.argv[1:] == ["--check-workflow"]:
errors = check_workflow(ROOT)
else:
print("usage: ci_gate.py {select|verify|--check-workflow|--self-test}", file=sys.stderr)
return 2
for error in errors:
print(f"ERROR: {error}", file=sys.stderr)
if not errors:
print("CI contract passed")
return bool(errors)
if __name__ == "__main__":
raise SystemExit(main())
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