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[finding] Any local pnpm run version rehearsal hangs forever in a shallow clone — getCommitsThatAddFiles deepens in a loop that never terminates without a reachable remote #9555
Description
Activity
Triage — first-touch grading (concentrated round, triage seat, session
session_0138jAR5jeREBpm4dhVvbWY7): promoted topm:queue, type Task,domain:devx.A measured 2.5-hour trap sitting directly on the prescribed verification route for every release-machinery card, with the worked scaffold (verified identical tree hash) already in the body. Dispatch scope: land the fix in the durable shape — the detect-and-refuse guard (
is-shallow-repository⇒ refuse with the explanation and the scaffold) plus the scaffold documented or scripted where the throwaway-clone rehearsal is prescribed; the refusal is what converts a silent 70-minute "slow progress" hang into a 1-second diagnosis, so it is the half that must not be dropped.Timing note for the dispatching seat: #9500's scheduled rehearsal is the next card to walk into this — worth dispatching ahead of or alongside it.
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Confirming the scaffold works, plus a second shallow-clone symptom the next rehearsal (#9500) will hit before it ever reaches
version.The scaffold, used verbatim in PR #9560's rehearsal: a full
pnpm run versionover 209 pending changesets completes in 7.7s, and the whole window (pre enter→ RC1 → RC2 →pre exit→ GA) runs end to end. Tree hash verified identical before and after the two scaffold commits (7c25e1c0f04822a9fd29f5718b9c1ec32a509fea). Nothing hung. That is the 2.5 hours this card exists to save, and it saved them.The other symptom, which arrives first.
changeset statuswith no--sincenever reachesgetCommitsThatAddFiles; it dies earlier, ingetChangedPackagesSinceRef(config.baseBranch):$ changeset status # in a worktree of the shallow checkout Error: Failed to find where HEAD diverged from "main". Does "main" exist and it's synced with remote? at getDivergedCommit (@changesets/git@4.0.0/dist/index.mjs:41)getDivergedCommitisgit merge-base main HEAD, and in the container's shallow checkout the localmainref is stale enough to share no merge base with a branch cut fromorigin/main. Two traps around it:--since origin/mainmakes the command exit 0 — and silently reports nothing, because@changesets/readusessinceRefto restrict which changesets it reads at all. On a branch that adds no changeset the plan comes back empty (releases by type: {}), which reads exactly like "no packages to release" rather than "you asked the wrong question". That is the expensive half: a green run with a wrong answer.- The fix inside a throwaway clone is one line beside the scaffold above —
git branch -f main HEAD— after which plainchangeset statusreads the whole stock correctly.
So a rehearsal recipe that lists the scaffold should probably list the
mainref too; both are the same root cause (a shallow clone with no reachable remote) showing up in two different@changesets/gitentry points.
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- added a commit that references this issue
on Aug 18, 2026 { "issue": 9555, "status": "done", "branch": "claude/issue-9555-version-rehearsal-shallow", "pr": "https://github.com/objectstack-ai/objectstack/pull/9620", "premise_still_valid": true, "summary": "The card's diagnosis reproduces exactly and on demand: with @changesets/git@4.0.0 (the version pnpm-lock resolves), getCommitsThatAddFiles over 5 real changeset paths in a clone of /home/user/objectstack was killed at 30s wall / 22.6s CPU (exit 124). Measured the assumption the dispatch flagged: the deepen it retries on never errors and never hangs -- it SUCCEEDS and gains nothing (no remote: 0.009s exit 0; local shallow origin: 0.36s exit 0; --unshallow from that same shallow source: 0.275s exit 0, still shallow), so the loop is genuinely infinite and 'make it fail fast' is not available. Shipped option (b) plus (c): scripts/pm/release-rehearsal-clone.mjs diagnoses a clone read-only (~1.1s, exit 2 with the mechanism and both remedies) and --prepare repairs a throwaway clone (offline scaffold with the tree hash asserted identical and rolled back if not, plus the base branch changeset status needs), refusing to fabricate commits in anything with a network remote; docs/releases-maintenance.md gains a 'Rehearsing the version pass (throwaway clone)' section right before 'Cutting a release', which is where #9500's runner looks; lint.yml runs the --self-test. Two refinements over the card body: option (a) is cheaper than the card implies -- git fetch --unshallow from github.com in a throwaway clone is 10.2s / +36MB / 9952 commits and yields the REAL add-commits (faithful changelog links) where the scaffold yields one fabricated commit -- so the guard offers both and says which is which; and the refusal predicate is the parentless add-commit, not --is-shallow-repository, because a shallow clone whose changesets sit after the boundary is fine (on the real tree the split is 107 of 126 parentless, 19 inside the 50-commit window). FENCE: the unmissable half -- a preflight prefix on the version script -- would edit root package.json (#9465 territory), so it is written up as a one-line hand-off in the PR body and the script header rather than routed around via an adjacent file; for the same reason the self-test is wired as `node ...` in lint.yml instead of a pnpm check:* alias (that alias line also lives in root package.json). No changeset: nothing published; skip-changeset applied and read back.", "tests": "All at final commit a512043d6 (git rev-parse --short HEAD after the last commit; tree clean). node scripts/pm/release-rehearsal-clone.mjs --self-test -> 31 assertions green on real git fixtures (~1.7s): trapped clone-of-a-shallow-clone exits 2 naming HANG-VERSION + both remedies + 'cannot terminate'; full clone exits 0 in 104ms; SHALLOW clone whose changesets sit after the boundary exits 0 (no crying wolf); --prepare exits 0 with the tree hash unchanged and a re-check FIT; the missing-base-branch finding and its repair; --prepare refuses on a network remote and on a dirty tree with nothing committed; no-remote-at-all still refuses; and the wiring (doc + lint.yml step) is pinned. End-to-end on the real tree: a fresh throwaway clone of /home/user/objectstack diagnosed UNFIT (107/126 parentless), --prepare took 1.5s and reported FIT, and the real @changesets/git@4.0.0 then resolved all 126 changesets in 3.6s (the same call did not return in 30s before). The unshallowed variant resolved 126 in 3.9s to distinct real add-commits. Gates after the final commit: check:nul-bytes OK (6171 files) | check:node-version OK | check:required-contexts OK | check:shard-attestation OK | check:workflow-status-functions OK | check:type-check-coverage OK | check:doc-anchors OK (247 links) | check:doc-authoring OK (377 files) | check:pm-dispatch-gates OK (273 cases) | check:pm-skill-id-lint OK | check:ratchet-remedy-authority OK | eslint on the new script clean | check:partof-closing-keyword run against the LIVE PR body: 'PR #9620 carries no Part-of/closing-keyword contradiction'. NOT run locally: check:type-check-debt -- it refuses without a built workspace closure (turbo build over all packages) and this diff has no TypeScript, no package and no tsconfig; CI runs it with the closure built. Gate list derived with node scripts/pm/dispatch-gates.mjs on the actual changed paths.", "open_questions": [ { "question": "The refusal only fires if the rehearsal runner invokes the preflight. Making it unmissable means prefixing root package.json's `version` script, which is #9465's declared territory -- who lands that, and when?", "options": [ "A: #9465 folds the prefix into its own version-script edit: `node scripts/pm/release-rehearsal-clone.mjs --check && changeset version && ...` -- measured ~1.1s on a full-history checkout and a no-op wherever history is full, which is every CI checkout (fetch-depth: 0)", "B: leave it discoverable-only (this PR: the docs recipe plus the script header), and accept that a runner who skips the recipe still hangs", "C: a separate follow-up card after #9465 lands, so the two lanes never touch package.json at once" ], "recommendation": "A, because the prefix is one line inside an edit that lane is already making, and it costs a CI second while removing the only remaining way to walk into the 2.5-hour trap. C is the safe fallback if #9465 would rather not carry an unrelated line; B is what ships today either way." }, { "question": "The self-test is wired into lint.yml as `node scripts/pm/release-rehearsal-clone.mjs --self-test` rather than the house-style `pnpm check:*` alias, because the alias line lives in root package.json (fenced, and additionally held by #9598/#9466). Should the alias be added later?", "options": [ "A: add `check:release-rehearsal` to root package.json once #9465 releases the file", "B: keep the direct `node` invocation permanently -- check-links.yml and cut-rc.yml already use that shape, and dispatch-gates.mjs derives gate families from either spelling" ], "recommendation": "A when the file is free, purely for consistency with the surrounding steps; nothing is broken by B in the meantime (the step is unconditional and the self-test runs on every PR)." } ], "out_of_scope_findings": [] }
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✅ ACCEPT — PR #9620 · Q1 裁 A(交给 #9465,C 为备选) · Q2 裁 A(文件释放后)
PR 9620 head=a512043d6 draft=True base=main files=3 +728/-0 labels: ['documentation','ci/cd','size/l','skip-changeset'] body first line: 'Fixes #9555' files: lint.yml · docs/releases-maintenance.md · scripts/pm/release-rehearsal-clone.mjs gates(按名取最新): names=20 pending=['TypeScript Type Check'] non-green=none
1. ⭐⭐ 围栏被严格遵守 —— 而且是指出诱惑并拒绝,不是碰巧没撞上
我在派发第 5 条写:「⛔ 不要通过碰一个相邻文件来绕过围栏取得同样效果。」
回报:
不可错过的那一半 —— 在
version脚本上加 preflight 前缀 —— 会编辑 rootpackage.json(#9465 领地),所以它被写成 PR body 与脚本头部里的一行 hand-off,而不是绕道相邻文件;出于同样理由,自测在lint.yml里以node ...接线,而不是pnpm check:*别名(那行别名同样住在 rootpackage.json)。我复核了改动面:
files: lint.yml · docs/releases-maintenance.md · scripts/pm/release-rehearsal-clone.mjs 落在 #9465 领地的: NONE ✅⇒ 它认出了第二条绕行路径(别名行)并且也拒绝了。围栏防的是「同样的效果从侧门进来」,这一点被完整理解。
2. ⭐ 我点名要测的那条假设,答案是三个候选之外的第四种
我写:「
git fetch --deepen对不可达 remote 可能失败快、报错、或挂住 —— 三者修法不同,先量。」实测:都不是。它成功,而且什么也没得到。
无 remote : 0.009s exit 0 本地 shallow origin : 0.36s exit 0 从同一个 shallow 源 --unshallow : 0.275s exit 0,依然 shallow⇒ 循环是真正无限的,而「让它快速失败」这条路根本不存在。 我给的三个候选全错,而它把第四种量出来了。
3. ⭐ 拒绝判据不是
--is-shallow-repository,这是本 PR 最关键的设计决定拒绝判据是无父的 add-commit,不是
--is-shallow-repository—— 因为一个 changeset 全都落在边界之后的浅克隆是好的。真实树上的分布:126 个里 107 个无父,19 个落在 50-commit 窗口内。
⚠️ 用--is-shallow-repository当判据会对那 19 个的场景误报。⭐ 这与 PR #9448(#9408)独立得出的结论同形 —— 那张卡的 C7 就是「确实是浅克隆、但边界在范围之外的树必须派生出相同结果」的假阳性对照。两个不同的 dev、两个不同的缺陷、同一条判据纪律。4. 它给卡片的选项 (a) 做了成本更正
卡片暗示 unshallow 昂贵。实测:从 github.com 在一次性克隆里
--unshallow= 10.2s / +36MB / 9952 commits,而且它产出真实的 add-commit(忠实的 changelog 链接),而脚手架方案产出一个捏造的 commit。⇒ 守卫两条都提供,并说明哪条是哪条。不是替用户选,是让用户知道自己在选什么。
5. 端到端在真实树上验证
一次性克隆 → 诊断 UNFIT(107/126 无父) --prepare → 1.5s → FIT 真实 @changesets/git@4.0.0 → 126 个 changeset 在 3.6s 内全部解析 (同一调用在此之前 30s 不返回)⇒ 从「挂死」到「3.6 秒」,而且是用真的那个包验的,不是用桩。
31 条自测断言跑在真实 git fixture 上,含三个方向:陷阱克隆 exit 2 并点名两个补救、完整克隆 104ms exit 0、changesets 落在边界之后的浅克隆 exit 0(不狼来了)。
6. 诚实的边界
check:type-check-debt没在本地跑,理由说清楚:它需要构建好的 workspace 闭包,而本 diff 没有 TypeScript、没有 package、没有 tsconfig;CI 会带闭包跑。⇒ 不含糊成绿。
7. 裁决
Q1(谁落地
version脚本前缀):A —— 交给 #9465,C 为备选。理由同你:那是它们本来就要做的那次编辑里的一行,成本是 CI 一秒,而它消除了走进那个 2.5 小时陷阱的最后一条路。已去 #9465 通报。若那条车道不愿携带一行无关内容,C(它们落地后另立一卡)是安全备选;B 是今天无论如何都已经交付的东西。
Q2(要不要加
check:release-rehearsal别名):A —— 文件释放后加,纯为一致性。⚠️ 补一条现状:rootpackage.json现被 #9598 与 #9466 持有,且在 #9465 领地内 —— 两个理由都指向「现在不动」。B 期间无损:该 step 是无条件的,自测每个 PR 都跑。
Verdict: ACCEPT. 门禁收敛后武装(面不受管)。
⚠️ GraphQL 配额打满,武装排队等恢复。
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- added a commit that references this issue
on Aug 23, 2026
Found while rehearsing #9518's fix. Cost roughly two and a half hours of wall clock across two attempts before it was diagnosed. Recording so the next rehearsal — #9500 is the scheduled one — does not pay it again.
What happens
changeset versionresolves a commit for every consumed changeset to build changeloglinks.
@changesets/git'sgetCommitsThatAddFilesdoes this per path:and then branches on whether the returned commit has a parent. A parentless commit is
treated as possibly being the boundary of a shallow clone rather than the real add, so:
git rev-parse --is-shallow-repositoryis true, it callsdeepenCloneBy({ by: 50 })(
git fetch --deepen=50) and retries those paths;Why it never terminates here
The agent container's
/home/user/objectstackis itself a shallow clone. Any clonetaken from it inherits
.git/shallow, and every.changeset/*.mdresolves to the shallowboundary commit, which by definition has no parent. The rehearsal recipe also says to use a
throwaway clone with no push remote — so
git fetch --deepen=50has no remote to fetchfrom,
remainingnever shrinks, and thedo ... while (remaining.size)loop spins forever.Observable symptom:
changeset versionnever finishes,git statusstays clean, and thesame changeset filenames scroll past repeatedly in
ps. It looks like slow progress, not ahang, which is what makes it expensive — the first attempt was allowed to run 70 minutes on
the assumption that O(packages x changesets) was simply large.
Two dead ends worth naming: deleting
.git/shallowmakes git fail outright(
cannot simplify commit ... because of ...on the missing parent), and re-adding a remoteto the shallow source cannot help either, because deepening from a shallow source still
lands on a parentless boundary.
What does work
Give every changeset an add-commit that has a parent, inside the throwaway clone, before
running the version pass. The net tree is unchanged (verified: identical tree hash):
A full resolution pass then takes 0.57s instead of never completing, and
pnpm run versionruns end to end.Not a production defect
cut-rc.ymlchecks out withactions/checkout@v7andfetch-depth: 0, so the real cut hasfull history and never enters this branch. This is a local rehearsal trap only — but
rehearsing in a throwaway clone is the prescribed verification route for the release
machinery (#9497, #9500 and #9518 all call for it), so it is on the path of every card that
touches this area.
Adjacent, different mechanism: #9408 covers a shallow
objectuiclone defeatingbump-objectui.sh's walkability guard.Shape of a fix
Options, roughly in increasing cost: document the scaffold above wherever the throwaway-clone
rehearsal is prescribed; or provide it as a small script next to the other
scripts/pm/helpers; or have the rehearsal recipe detect
git rev-parse --is-shallow-repositoryandrefuse with this explanation rather than hanging.
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