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Author SHA1 Message Date
Neil 26dfa46aa9 fix(wsl): resolve sparse-checkout and diff-stamp gitdirs through the caller's distro (#17932)
Two main-process `resolveGitDir` call sites dropped the WSL distro their caller
already held, so they could only resolve a gitdir pointer whose spelling carries
its own translation: a `//wsl.localhost/<Distro>/...` base, or a `/mnt/<letter>`
drvfs pointer that maps to a drive letter on its own.

The layout that needs the third case is a repo inside the distro's filesystem
with its worktrees on the Windows drive. `git worktree list` reports the worktree
as `/mnt/c/wt/x`, which the listing translates to `C:\wt\x` — a base that no
longer names a distro — while the `.git` gitfile beside it points at
`/home/me/repo/.git/worktrees/x`, which has no drive to derive. Win32 then treats
that pointer as absolute and reads a path that names nothing:

- `detectSparseCheckout` stats `info/sparse-checkout` under the fabricated path,
  always misses, and reports the worktree as non-sparse — no sparse badge, and
  the file list claims files that are not on disk.
- `readWorktreeDiffStamp` reads HEAD under the same path, gets nothing, and
  returns null. Null is the safe answer ("cannot prove unchanged"), but it
  retires the settled-diff cache for every file in that worktree, so each diff
  respawns Git.

Both callers already have the distro: the listing threads its
`GitWorktreeExecOptions` to `annotateSparseCheckoutStatus`, on through
`detectSparseCheckoutCached` (the annotation cache added by #17859) and its
background revalidation probe, and finally to `detectSparseCheckout`; and
`file-diff` already forwards its `GitRuntimeOptions` to `readWorktreeDiffStamp`,
which now forwards it to `resolveGitDir` as well.

`resolveGitMetadataPath` still prefers a UNC base's distro and still tries drvfs
before the caller-named distro, so nothing that resolved before resolves
differently.

The cache hop matters twice over. It is the only remaining caller of
`detectSparseCheckout`, so without threading it the fix would not reach the
probe at all. And the cache is where the bug turns sticky. #17859 keyed entries
on `repoPath` + `worktreePath` alone, on the reasoning that the distro is a
property of the repo and so every read for a given `repoPath` carries the same
one. That invariant does not hold. `listRepoWorktrees(repo)` is called with no
options at all from the filesystem-auth root rebuild
(`registered-worktree-roots-cache.ts`, reached from `ensureAuthorizedRootsCache`
on any auth check with a dirty cache) and from the local worktree-ownership
check in `filesystem-worktree-helpers.ts`. Both land on the *same* key as the
distro-carrying listing, because `translateWslOutputPaths` derives the distro
from the cwd spelling before falling back to `options.wslDistro`, so a
UNC-spelled repo path yields the identical `C:\...` worktree row either way.
Measured on Windows in one process, branch build: a distro-less read followed by
a distro-carrying read reported the sparse worktree as non-sparse both times.

So `wslDistro` now joins the cache key -- trimmed and lowercased, matching how
the rest of the codebase compares distro names, and appended last so the
repo-scoped prefix delete still matches every variant. The per-path invalidate
becomes a prefix delete for the same reason, dropping every distro variant of a
removed or moved worktree.

Keying on it closes both halves of the defect. A correct caller can no longer be
served an answer derived without the distro it supplied. And because the entry a
reader reaches is now selected by the same distro it would re-probe with,
`revalidateInBackground` can no longer re-derive a warm entry under weaker
options -- which mattered on its own: a distro-less reader crossing the
five-minute window would otherwise flip a correct `true` to `false`, and the
resulting change notification runs the registered invalidator, clearing the
whole repo's cache and re-probing every worktree cold, on a five-minute loop.

Cost of the extra key dimension is bounded by the number of distinct distros a
given repo is actually read under: one where a distro is threaded everywhere,
two while the distro-less callers above still exist. Entries are still
repo-scoped, and both clears already sweep by prefix.

Per-platform delta:
- macOS/Linux: no change. Guest-pointer translation is gated to win32 and a
  caller-named distro is ignored off Windows; no caller supplies one there, so
  the cache keys and probes exactly as before.
- native Windows, no WSL: no change. `wslDistro` is undefined, so the resolver
  takes exactly the branches it took before and every read keys on the same
  empty distro component, so the cache behaves exactly as it did.
- Windows + WSL, UNC-spelled worktree: no change. The base already names the
  distro and outranks the caller's.
- Windows + WSL, drvfs-spelled worktree with a drvfs pointer: no change. The
  drive-letter derivation still runs first.
- Windows + WSL, drvfs-spelled worktree with a non-drvfs pointer: the sparse
  badge appears and the settled-diff cache starts hitting. Both previously
  failed toward "not sparse" / "do not cache", so neither can now serve a stale
  answer, and the distro-less listings no longer share the badge's cache entry.
- SSH/relay: none. Those paths return through the provider branch before
  reaching either function.
- folder workspaces, GitLab: none. Neither is on these code paths.

Not in this change:
- `readRepoCommonDirFromDisk` (worktree-listing). Passing the distro there is
  inert: a repo root's `.git` is a directory, so the gitfile-pointer branch never
  runs, and when `repoPath` itself is guest-spelled the preceding `stat` already
  fails — which no `resolveGitDir` option can fix.
- The two `findExistingWorktreeSymlinkPaths` calls on the removal paths. Both
  receive `registeredWorktree.path` from `listWorktreesStrict`, which already
  translates every row out of the guest namespace, so the distro would be a
  no-op. The `removeWorktreeLinkedPaths` unlink beside them is untranslated too,
  so a half-threaded fix would only move the refusal from Orca's preflight to
  `git worktree remove`.
- An absolute `commondir` payload, which `resolveGitCommonDir` still resolves
  untranslated. Git writes that file relative in the layouts above, and the
  failure direction is unchanged.
- Giving the two distro-less `listRepoWorktrees(repo)` callers a distro. Neither
  reads `isSparse` -- both use only `worktree.path` -- so the distro would buy
  them nothing they consume, while resolving a project runtime inside the
  filesystem-auth rebuild would put a call that throws on `repair-required`
  behind a catch that skips the whole repo's authorized roots. The cache key
  makes their reads harmless; skipping the annotation for callers that never
  read it is a separate, larger change. The third no-options call in
  `hosted-review.ts` is inside the `repo.connectionId` branch and returns
  through the SSH provider, so it never reaches this cache.
2026-09-01 04:25:19 -07:00
Neil 1268fb56f1 fix(worktree): complete a create Git can confirm but cannot list (#17388)
* fix(worktree): complete a create Git can confirm but cannot list

`worktree.create` verified against `listWorktrees`, which softens every git
failure to `[]`. Any listing failure therefore failed a create whose worktree
and branch `git worktree add` had already written, orphaning both, and reported
only 'Worktree created but not found in listing' — the real cause reached the
main-process console and never the user.

Verify against the error-propagating listing instead, and when that fails or
omits the row, rebuild the row by asking Git about the worktree itself. The
direct read returns nothing unless Git resolves the path into this repo's
object store with the expected branch checked out, so an unrelated or half-made
checkout still fails the create.

Fixes #16520

* fix(worktree): authorize a recovered create and reject an unreadable HEAD

Review follow-ups on the create-verification fallback:
- register the recovered worktree's own root, additively, so the create the
  user just made is not rejected by filesystem/git-status IPC
- treat an unreadable HEAD as no recovery instead of a blank OID
- keep the direct read's failure when the listing merely omitted the row
- skip the symlink cases on Windows and reset the new harness mock

* fix(worktree): bound the create-recovery disk read and keep WSL paths case-sensitive

Readiness-scan follow-ups:
- deadline the filesystem common-dir read; a .git on a hung mount left the whole
  create IPC pending where it used to fail after the Git deadline
- offer no disk candidate for a bare repo instead of a fabricated <repo>/.git
- compare POSIX common dirs case-sensitively, so two WSL repos differing only in
  case are not accepted as one object store on a Windows desktop
- move toGitOutputSpace to shared/wsl-paths as toWslExecutionSpace, next to the
  parseWslUncPath callers that already open-code it

* fix(worktree): share one budget for create verification and keep recovered roots

Three follow-ups from review of the create-recovery path:

- The recovery no longer starts a fresh 30s deadline after the listing already
  burned one, so worst-case create verification stays at ~30s instead of ~60s.
  A 5s floor keeps the direct read a chance to answer when the listing spent
  the whole budget.
- rebuildAuthorizedRootsCache now carries a repo's previously registered roots
  forward when its listing throws. A rebuild running while Git is still broken
  could otherwise un-authorize the worktree a create just recovered.
- Corrected the scan-cache doc comment: it claimed strict and lenient listings
  coalesce, but the cache key includes the runner name precisely to keep them
  apart, so a strict joiner can never inherit a lenient scan's softened [].

Each change has a negative control: reverting the hunk fails exactly its own
test and nothing else.

* fix(worktree): keep a recovered worktree authorized across roots-cache rebuilds

The previous approach registered a recovered create into the same per-repo set
the rebuild recomputes from `git worktree list`. That set is derived from the
very listing that failed, so a rebuild would re-deny the worktree — either by
overlapping the registration, or by simply listing again and omitting the row.
Carrying old roots forward on a thrown listing did not cover either case.

Recovered roots now live in their own additive layer that rebuilds union in
rather than replace. The layer is retired on evidence, not on a timer:

- the listing can see the worktree again (Git recovered), or
- the listing succeeded and the directory is gone (worktree removed).

A repo whose listing threw is left untouched, because a dead mount fails both
the listing and the stat, and treating that as "removed" would revoke the
worktree in exactly the outage this layer exists for. The layer is capped so it
cannot grow unbounded, and survives cache invalidation deliberately: repo
mutations are frequent and would otherwise re-deny a recovered worktree.

Three tests cover the healthy-rebuild-omits-the-row case, the in-flight rebuild
race, and retirement once the listing sees it again. Removing the union fails
exactly the two keep-tests and nothing else.

* perf(worktree): only read the repo's .git from disk when Git's own answer disagrees

The disk read is a second opinion on Git's reading of the common dir, but it ran
unconditionally as part of the same Promise.all. A deadline bounds the IPC, not
the syscall: Promise.race cannot cancel an in-flight fs operation, and a `.git`
on a hung mount (dead NFS/SSHFS, stalled WSL 9p) pins a libuv threadpool thread
that no timeout can reclaim. AbortSignal would not help either — fsPromises.stat
takes no signal, and a blocked syscall is not interruptible from userland.

So stop paying it on the happy path: read from disk only when Git's own reading
did not already confirm the common dir. Same accept/reject outcome, but the
threadpool exposure now requires both a failed listing and Git disagreeing about
the repo, instead of every recovered create.

* fix(worktree): compare the disk common-dir witness in Git's execution space

Exercising the fix on a real Windows host against WSL Ubuntu-24.04 found the
filesystem second opinion is inert there. Node reads `.git` in the caller's
space and answers `\\wsl.localhost\<Distro>\home\...\.git`, while Git-in-the-
distro answers `/home/...`. isSameCommonDirPath refuses to compare a POSIX path
against a Windows one, and canonicalizeLocalPath cannot bridge them because
realpath on a Linux path from a Windows process is ENOENT.

So the candidate could never match, and the one case that depends on this
witness alone — a symlinked repo root on the Git 2.25 fallback — declined a
worktree Git had already confirmed. Run the disk result through
toWslExecutionSpace, the same translation readRepoLocation already uses.

This is a false reject, not a false accept: it made recovery give up, never
adopt the wrong repo. Verified on awin; the modern --path-format=absolute
branch was unaffected because Git answers both sides itself there.

* fix(worktree): retire a recovered root only on proof, never on a stalled probe

The prune ran an unbounded stat and read every failure as removal. Two consequences, both in
the outage the recovered layer exists for: a hung mount stalled the rebuild that gates
filesystem auth, and a transient EACCES/EIO revoked a live worktree. The listingFailed guard
did not cover either, because listWorktrees softens Git failures to [] and never throws.

Prune now retires on definitive ENOENT only, probes in parallel under a deadline, and treats a
stall as inconclusive. The capacity bound refuses a new root instead of evicting an authorized
one, so an over-cap create is merely unauthorized rather than a live worktree being revoked.
2026-08-30 14:42:07 -07:00
Neil 037cc2e531 Split Git worktree responsibilities (#17253)
* Split speech session lifecycle

* Split terminal output scheduler pipeline

* Split mobile browser pane modules

* Prune resolved max-lines suppressions

* Split pane tree equalization logic

* Extract mobile troubleshoot screen styles

* Split external automation manager

* Split main window service attachments

* Split hosted review creation checks

* Split automation dispatch event handling

* Split settings navigation metadata

* Split daemon initialization lifecycle

* Split GitLab item dialog

* Split relay dispatcher layers

* Split mobile host screen

* Retarget mobile view settings source test

* Split runtime file client layers

* Split ports panel layers

* Split runtime environments pane layers

* Split local PTY provider responsibilities

* Split CDP bridge responsibilities

* Split relay Git handler responsibilities

* Track moved relay Git fetch audit

* Split Linear item drawer responsibilities

* Split telemetry event schema responsibilities

* Split resource usage status responsibilities

* Split remote terminal multiplexer responsibilities

* Split Git worktree responsibilities

* Fix F3-speech for #17123

* Fix F1-cycle for #17131

* Fix F4-navtest for #17157

* Fix F2-allowlist for #17161
2026-08-29 20:20:55 -07:00