#!/usr/bin/env python3 r"""`gpu-evidence.yml` 的**接线自检**(M253 / r1+r2 复审返工):把「这道门禁怎么才算没被改绿」变成判据。 历史(留着,防止下一个人再写绝对化结论): - r1 版宣称「不可能被改成总是绿」,复审造 19 条变异**漏 11 条**(最要命:`available` 恒 false ⇒ 门永久 关闭而每次绿)—— 根因是判据只做字符串存在性检查、自测步被整条豁免、`is True` 挡不住 `'true'`。 - r2 版改成 6 条判据后,复审 40 条新变异**仍漏 11 条**:job outputs 的 `available` 绑到 `reason`/字面量 (门永久关、每次绿)、判据步 `|| echo "先忽略"` / `; :` / `| cat` / `if !` / `true # 原行`(**绿而没判**, 真 bash 实测 exit 0)、自检步被指向另一个脚本(自检根本不跑)、`on:` 触发面被删。 教训:**「不吞退出码」不能靠标记表**,得把 `run` 原文真跑一遍。 现在十条判据,能结构化的不靠字符串、能跑的不靠读文本: | # | 判据 | 怎么判 | |---|------|--------| | 1 | 五步必须在场 | 按 `id:` 认 `vectors`/`exitcodes`/`wiring`/`detect`/`judge`,各恰好一步;前四步不许有 `if:`(step 或 job 级);`exitcodes` 必须真断言 `expect 0/1/2` | | 2 | 自测步跑的是对脚本、且是单条命令 | `wiring` 的 `run` 必须含 `gpu_shot_ci_selftest.py`;`vectors`/`wiring` 的 `run` 不许有换行、`\|`、`&`、`;`、反引号、`#`、`$(` —— 否则红了之后一行 `\|\| echo 先忽略` 就能关掉它 | | 3 | 判定必须挂门 | **解析 `if:` 表达式后求值**:`available` 取 `'true'` 必须真、`'false'`/`''` 必须假;job 级与 step 级各自都要满足;认不出的表达式一律红 | | 4 | 判定用探测给的产物 | `run` 里两种调用形态都在场(`"$LOG" "$PNG"` 与 `"$LOG" --expect-refuse`),`env` 来自 `needs.probe.outputs.*` | | 5 | 判据步**真跑两次** | `judge` 的 `run` 原文实跑:正例成对必须 `exit 0`,CPU 档日志(`renderer=tiny-skia`)必须 `exit≠0` —— 一次封掉整类「吞码」 | | 6 | 跳过路径**真跑 7 种输入** | `detect` 的 `run` 原文实跑:`available` 的值、summary 文案、`::warning::`、三条红线必须 `exit≠0` 且不写 outputs | | 7 | 禁 `continue-on-error` | 按 YAML 布尔语义:`true` / `'true'` / `${{ true }}` / 任意表达式都算开启 | | 8 | 不吞退出码(标记表) | 扫所有 `python`+`packaging/` 的 `run`:`\|\| true` / `; true` / `\|\| exit 0` / 裸 `exit 0`(判据 5 的功能断言才是主守,这张表只是兜底) | | 9 | `probe.outputs` 必须绑到 `detect` | `available`/`log`/`png` 三个键的值必须**逐个**等于 `${{ steps.detect.outputs.<同名> }}` | | 10 | 触发面 | `on:` 必须同时有 `push`(含 `main`)、`pull_request`、`workflow_call` | ## 覆盖的「改绿」类别(封闭清单:10 类,33 条变异向量) 变异数据在 `packaging/tests/gpu_shot_ci_vectors.json`,**按解析后的结构注入**(`step_delete` / `job_delete` / `step_set` / `job_set` / `path_set` / `trigger_set` / `run_append` / `run_replace`, `also` 可叠加),每条都必须让对应判据当场红、基线必须全绿。类别与来源: 1. 步骤被删 / 被 `if:` 挡住 / 被 `continue-on-error` 兜住(r1 M7/M9/M10/M13/M15/M16/M17/M18、r2 N15/N18); 2. 自测步指向别的脚本、或写成能被 `|| echo` 关掉的多行/带运算符命令(r2 N40/N41/N23); 3. 判定的门被写成恒真(`|| always()`、`if: true`、step 级 `if: ${{ always() }}`、删门)(r1 M3/M19、r2 N4/N5); 4. 判定的产物路径被写死或调用形态被换掉(r1 M20、r2 N9); 5. 判据步的退出码被吞 / 分支没走到(r1 M4、r2 N22/N24/N25/N26/N8'—— 都用真 bash 实跑判据步验证); 6. `detect` 的结论被改坏(`available` 恒 false、跳过不留痕、删 `$GITHUB_OUTPUT`)(r1 M11/M12/M5/M6/M14、r2 N6/N7/N20); 7. `probe.outputs.*` 被改指向别的 step 输出或字面量(**r2 N28/N29**); 8. `on:` 触发面被削(删 `push`/`pull_request`/`workflow_call`)(**r2 N11/N12**); 9. 排版变动**不误红**(加注释/空行基线仍绿)、变异锚点坏掉**报「向量失效」并红**(r2 N16/N17); 10. `if:` 求值器不接受近似写法(`!=`、`!(…)`、`fromJSON`、未知标识符一律红)(r2 N1/N2/N3)。 ## 明确**不覆盖**(边界,逐条给理由) - **改判据脚本本身**:能改这个文件的人也能改判据,它不自守。它只防「顺手改绿」,不防恶意改绿。 - **载体依赖**:把整个 `gpu-evidence.yml` 删掉/换成别的文件,就没有任何东西会跑这个自检 —— 守门人住在 被守对象自己的文件里。`guards.yml` 已经 399/400 行(`file-size` 那道门就扫 `*.yml`),塞不进去。 - **`if:` 求值器与 GitHub 语义的差异**:只认 `==`/`!=`/`&&`/`||`/括号/字符串/`needs..outputs.<名>`/ `true|false|null`/`always()|success()|failure()|cancelled()`(后四者取常量);其余认不出就是红。 - **判据 4 的「合法调用替换」**:把正例分支换成另一种**合法**调用(`"$PNG" --expect-refuse`)抓不到; 后果是假红不是假绿,判据 5 也会把它判红(正例跑成非 0)。 - **`exitcodes` 那一步的断言被削弱**(例如末尾加 `|| echo`):它是**见证步**,不是门;门的绿由判据 5/6 的功能断言守住,见证步被削只影响「退出码语义也被验过」这条证据。 - **判据 6 的 7 种输入之外的分支**(例如 `detect` 里新增的第五个分支)。 - **真 Actions 的行为**:`if:` 的真求值、job skip 的呈现、required status check 与 skipped 的交互, 本脚本一概不管(`if:` 语义是本脚本的小求值器模拟的)。 ## 自我定位与止步线 本文件**不宣称**「不可能被改成总是绿」,只宣称「上面那张封闭清单(10 类 / 33 条向量)会被抓」。 **这条门禁自 2026-11-11 起停止加固**:再往下就会无限递归(守卫守守卫守守卫),边际收益已很低。 后续若要扩覆盖面,必须由**人类新开 mission**,不要在同一轮里继续加判据。 python3 packaging/tests/gpu_shot_ci_selftest.py """ from __future__ import annotations import copy import json import re import sys from pathlib import Path PACKAGING = Path(__file__).resolve().parent.parent WORKFLOW = PACKAGING.parent / ".github/workflows/gpu-evidence.yml" VECTORS_PATH = Path(__file__).resolve().parent / "gpu_shot_ci_vectors.json" sys.path.insert(0, str(PACKAGING)) sys.path.insert(0, str(Path(__file__).resolve().parent)) from check_workflows_yaml import load_yaml # noqa: E402 from gpu_shot_ci_expr import ConditionError, evaluate_condition # noqa: E402 from gpu_shot_ci_probe import judge_problems, probe_problems # noqa: E402 #: 必须在场、且必须无条件的步骤(按 `id:` 认,不按步骤名认)。 REQUIRED_STEPS = { "vectors": "判据实现自测(`--self-test`,19 条向量)", "exitcodes": "退出码语义(真 CLI 走 0/1/2)", "wiring": "接线自检(本脚本,必须在场)", "detect": "产物探测(probe 的唯一步骤)", "judge": "真实产物判据(evidence 的步骤)", } UNCONDITIONAL = ("vectors", "exitcodes", "wiring", "detect") PROBE_OUTPUT_KEYS = ("available", "log", "png") SINGLE_COMMAND_STEPS = ("vectors", "wiring") SHELL_OPERATOR = re.compile(r"[|&;`#$()<>\n]") SWALLOW_MARKS = ("|| true", "; true", "|| exit 0", "exit 0") PYTHON_RE = re.compile(r"\bpython3?\b") def coerce_flag(value) -> bool: """YAML 里的开关按**真语义**判:`true` / `'true'` / `${{ true }}` 都算开启。""" if value is True: return True if value is False or value is None: return False if isinstance(value, (int, float)): return bool(value) return str(value).strip().lower() not in {"false", "${{ false }}", "0", "no", "off", ""} def steps(doc: dict) -> list[tuple[str, dict, dict]]: found: list[tuple[str, dict, dict]] = [] for job_id, job in (doc.get("jobs") or {}).items(): for step in (job or {}).get("steps") or []: if isinstance(step, dict): found.append((job_id, job, step)) return found def step_by_id(doc: dict, sid: str) -> tuple[str, dict, dict] | None: found = [entry for entry in steps(doc) if entry[2].get("id") == sid] return found[0] if len(found) == 1 else None def run_of(doc: dict, sid: str) -> str: entry = step_by_id(doc, sid) return (entry[2].get("run") or "") if entry else "" def check_presence(doc: dict) -> list[str]: problems: list[str] = [] counts = {sid: len([e for e in steps(doc) if e[2].get("id") == sid]) for sid in REQUIRED_STEPS} for sid, label in REQUIRED_STEPS.items(): if counts[sid] != 1: problems.append(f"`id: {sid}`({label})必须恰好一步,实际 {counts[sid]} 步 —— 删掉或复制都算红") continue job_id, job, step = step_by_id(doc, sid) if sid in UNCONDITIONAL and ("if" in step or "if" in job): problems.append(f"`id: {sid}`({label})带 `if:`(步骤或 job 级)—— 这四步必须无条件跑,否则门禁可被静默关掉") asserted = set(re.findall(r"\bexpect\s+([0-9]+)\b", run_of(doc, "exitcodes"))) missing = {"0", "1", "2"} - asserted if step_by_id(doc, "exitcodes") and missing: problems.append(f"`id: exitcodes` 没有断言退出码 {'/'.join(sorted(missing))}(`expect <码>`)—— 三个码就是门禁的接口") return problems def check_selftest_commands(doc: dict) -> list[str]: problems: list[str] = [] wiring = run_of(doc, "wiring").strip() if wiring and "gpu_shot_ci_selftest.py" not in wiring: problems.append("`id: wiring` 的 `run` 里没有 `gpu_shot_ci_selftest.py` —— 它可能指向别的脚本(自检根本没跑)") for sid in SINGLE_COMMAND_STEPS: run = run_of(doc, sid).strip() if not run: continue if SHELL_OPERATOR.search(run): problems.append( f"`id: {sid}` 的 `run` 必须是**单条命令**(不许换行 / `|` / `&` / `;` / 反引号 / `#` / `$(`)" f"—— 否则红了之后一行 `|| echo 先忽略` 就能把它关掉:`{run}`" ) return problems def check_judge_gate(doc: dict) -> list[str]: entry = step_by_id(doc, "judge") if entry is None: return [] # presence 已经报过 job_id, job, step = entry gates: list[tuple[str, object]] = [] if "if" in job: gates.append((f"job `{job_id}` 的 `if`", job.get("if"))) if "if" in step: gates.append(("`id: judge` 步的 `if`", step.get("if"))) if not gates: return ["`judge` 步与它的 job 都没有 `if:` —— 无产物时也会照跑,「跳过」与「通过」分不开"] problems: list[str] = [] for label, raw in gates: for available, want in (("true", True), ("false", False), ("", False)): try: got = evaluate_condition(raw, available) except ConditionError as error: problems.append(f"{label} 认不出({error})—— 认不出即红:`{raw}`") break if got is not want: problems.append(f"{label} 在 `available={available!r}` 时求值为 {got},应为 {want}:`{raw}`") return problems def check_judge_invocation(doc: dict) -> list[str]: entry = step_by_id(doc, "judge") if entry is None: return [] run = entry[2].get("run") or "" env = entry[2].get("env") or {} problems: list[str] = [] for form in ('check_gpu_shot.py "$LOG" "$PNG"', 'check_gpu_shot.py "$LOG" --expect-refuse'): if form not in run: problems.append(f"`id: judge` 的 `run` 里缺调用形态 `{form}` —— 该分支可以「什么都没判」就绿") for name, ref in (("LOG", "needs.probe.outputs.log"), ("PNG", "needs.probe.outputs.png")): if ref not in str(env.get(name, "")): problems.append(f"`judge` 的 `{name}` 不是来自 `{ref}`(写死的路径会在跳过那条路上判错东西)") return problems def check_probe_outputs(doc: dict) -> list[str]: outputs = (doc.get("jobs") or {}).get("probe", {}).get("outputs") or {} problems: list[str] = [] for key in PROBE_OUTPUT_KEYS: want = "${{ steps.detect.outputs.%s }}" % key got = str(outputs.get(key, "")).strip() if got != want: problems.append( f"`probe.outputs.{key}` 必须恰好是 `{want}`,实际 {got!r} —— " "改指向(`reason` / 字面量 `'false'`)会让门永久关掉,而每次运行都绿" ) return problems def check_triggers(doc: dict) -> list[str]: on_block = doc.get("on", doc.get(True)) if not isinstance(on_block, dict): return ["`on:` 不是一个映射 —— 触发面认不出(认不出即红)"] problems: list[str] = [] if "push" not in on_block: problems.append("`on:` 少了 `push` —— main 上的门禁会停摆") else: branches = (on_block.get("push") or {}).get("branches") if isinstance(on_block.get("push"), dict) else None if branches is not None and "main" not in [str(branch) for branch in branches]: problems.append("`on.push.branches` 里没有 `main` —— main 上的门禁会停摆") if "pull_request" not in on_block: problems.append("`on:` 少了 `pull_request` —— PR 上的门禁会停摆") if "workflow_call" not in on_block: problems.append("`on:` 少了 `workflow_call` —— `dev-guards.yml` 的 `uses:` 会加载失败") return problems def check_continue_on_error(doc: dict) -> list[str]: problems: list[str] = [] for job_id, job in (doc.get("jobs") or {}).items(): if coerce_flag((job or {}).get("continue-on-error")): problems.append(f"job `{job_id}` 带 `continue-on-error: {job.get('continue-on-error')!r}` —— 判据红也会变绿") for step in (job or {}).get("steps") or []: if isinstance(step, dict) and coerce_flag(step.get("continue-on-error")): problems.append(f"job `{job_id}` 的 `{step.get('id') or step.get('name')}` 带 `continue-on-error: {step.get('continue-on-error')!r}`") return problems def check_no_swallow(doc: dict) -> list[str]: problems: list[str] = [] for job_id, _job, step in steps(doc): run = step.get("run") or "" if not (PYTHON_RE.search(run) and "packaging/" in run): continue hits = [mark for mark in SWALLOW_MARKS if mark in run] if hits: problems.append(f"job `{job_id}` 的 `{step.get('id') or step.get('name')}` 里出现 {'/'.join(f'`{h}`' for h in hits)} —— 退出码被吞掉,判据红也绿") return problems CHECKS = { "1 五步必须在场": check_presence, "2 自测步跑的是对脚本且是单条命令": check_selftest_commands, "3 判定必须挂门": check_judge_gate, "4 判定用探测给的产物": check_judge_invocation, "5 判据步真跑(正例 0 / CPU 档非 0)": lambda doc: judge_problems(run_of(doc, "judge")), "6 跳过路径真跑(7 种输入)": lambda doc: probe_problems(run_of(doc, "detect")), "7 禁 continue-on-error": check_continue_on_error, "8 不吞退出码(标记表,兜底)": check_no_swallow, "9 probe.outputs 绑定 detect": check_probe_outputs, "10 触发面(push/pull_request/workflow_call)": check_triggers, } def evaluate(doc: dict) -> dict[str, list[str]]: if not isinstance(doc, dict) or not isinstance(doc.get("jobs"), dict): return {name: ["workflow 不是一个带 jobs 的 YAML 映射"] for name in CHECKS} return {name: check(doc) for name, check in CHECKS.items()} def _walk(doc: dict, path: list) -> tuple[dict, object]: node = doc for key in path[:-1]: node = node[key] return node, path[-1] def apply_vector(doc: dict, vector: dict) -> dict: """按**解析后的结构**注入变异(不碰文本格式,改动 workflow 的排版不会让向量过期)。""" op = vector["op"] target = str(vector.get("target", "")) on_key = "on" if "on" in doc else True if op in ("step_delete", "step_set", "run_append", "run_replace"): entry = step_by_id(doc, target) if entry is None: raise KeyError(f"找不到唯一的 `id: {target}`") step = entry[2] if op == "step_delete": entry[1]["steps"].remove(step) elif op == "step_set": step[vector["key"]] = vector["value"] else: text = step.get("run") or "" if op == "run_append": step["run"] = text + vector["value"] else: find, replacement, occurrence = vector["find"], vector["replace"], int(vector.get("occurrence", 1)) pos = -1 for _ in range(occurrence): pos = text.find(find, pos + 1) if pos < 0: raise KeyError(f"`id: {target}` 的 run 里找不到第 {occurrence} 处 `{find}`") step["run"] = text[:pos] + replacement + text[pos + len(find) :] elif op in ("job_delete", "job_set"): if target not in (doc.get("jobs") or {}): raise KeyError(f"没有 job `{target}`") if op == "job_delete": del doc["jobs"][target] else: doc["jobs"][target][vector["key"]] = vector["value"] elif op == "path_set": parent, key = _walk(doc, vector["path"]) if key not in parent: raise KeyError(f"路径不存在:{vector['path']}") parent[key] = vector["value"] elif op == "trigger_set": doc[on_key] = vector["value"] else: raise KeyError(f"不认识的变异操作 `{op}`") for extra in vector.get("also", []): apply_vector(doc, extra) return doc def main() -> int: yaml = load_yaml() if not WORKFLOW.is_file(): print(f"::error file={WORKFLOW}::接线自检的靶子不存在", file=sys.stderr) return 1 doc = yaml.safe_load(WORKFLOW.read_text(encoding="utf-8")) failures = 0 for name, problems in evaluate(doc).items(): if problems: failures += 1 print(f"FAIL: 判据「{name}」没过:", file=sys.stderr) for problem in problems: print(f" - {problem}", file=sys.stderr) else: print(f"OK: 判据「{name}」") vectors = json.loads(VECTORS_PATH.read_text(encoding="utf-8"))["vectors"] for vector in vectors: label = f"{vector['id']} {vector['label']}" try: mutated = apply_vector(copy.deepcopy(doc), vector) except Exception as error: # noqa: BLE001 - 向量失效(锚点没了)同样算红,逼着人更新它 failures += 1 print(f"FAIL: 变异「{label}」注入失败(向量失效):{error}", file=sys.stderr) continue broken = [name for name, problems in evaluate(mutated).items() if problems] if vector["expect"] not in broken: failures += 1 print(f"FAIL: 变异「{label}」没被抓到(应红「{vector['expect']}」,实际红的是 {broken or '无'})", file=sys.stderr) else: print(f"OK: 变异「{label}」→ 「{vector['expect']}」当场红") if failures: print(f"FAIL:{failures} 处没过({WORKFLOW.name})", file=sys.stderr) return 1 print(f"ok: {len(CHECKS)} 条接线判据全过,{len(vectors)} 条变异向量全部被抓({WORKFLOW.name})") print(" 封闭清单 10 类(见 docstring);不覆盖:改判据脚本 / 删掉整个 workflow(载体依赖)/ 求值器语义差 / 合法调用替换。") print(" 本门禁自 2026-11-11 起停止加固,扩项须由人类新开 mission。") return 0 if __name__ == "__main__": raise SystemExit(main())