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orca/config
Neil ea01cd0ccd fix(windows): reject a node-pty addon that predates the MSYS breakaway denial (#20047)
* docs(windows): record the measured MSYS job-breakaway mechanism

The per-PTY job already denies JOB_OBJECT_LIMIT_BREAKAWAY_OK for Cygwin/MSYS
shells (#19068), but nothing records why, and a conpty.node built before that
commit fails windows-msys-job.win32.test.ts in a way that reads as a source
defect. Measured on a real Windows 11 host: both the plain and the exec-
replacement Git Bash shapes leak, the escape is the MSYS runtime's own
spawn/exec (fork keeps membership), and a single-variable A/B on
usesCygwinRuntime flips the result 0/2 -> 4/4.

Also names the gap the failure hid behind: node-pty-job-ownership.cjs asserts
symbol presence, which cannot distinguish patch revisions.

* fix(windows): reject a node-pty addon that predates the MSYS breakaway denial

The native-runtime gate asserted only that terminateJob, listJobProcessIds and
assignCurrentProcessToJob were exported. All three predate the Cygwin/MSYS
breakaway denial, so an addon built before it passes every gate,
isPtyJobOwnershipAvailable() returns true, and windows-pty-job.win32.test.ts
passes 6/6 -- while every Git Bash child is created outside its pane's job and
survives terminatePtyJob.

Read the resolved .node and require the wide msys-2.0.dll literal that
usesCygwinRuntime holds, the way stagedRelayAddonIsUnpatched() already tells a
patched windows-process-tree addon from a published one. An addon the caller
cannot name is refused rather than skipped: a gate that cannot see its subject
is not a gate.

Verified against real binaries on a Windows 11 host: the shared checkout's
pre-#19068 build errors, a build from current patched source passes, a missing
path errors.

Also closes the cross-host packaging skip. The export half has to load the
addon so it cannot run when the packaging host is not the target, which is how
a Windows release built elsewhere could ship this. The marker is a file read
and needs neither; an unrecognised layout warns rather than fails a release
that was packaging fine.

* fix(windows): check the MSYS breakaway denial on the rebuild path too

The Electron probe carried the marker check, but it lives inside
probeElectronNativeModules, which returns early whenever the Electron package
binary is unusable. Covered by another path is not this path checks -- and the
defect this whole change closes was a gate that looked like it checked.

Reading the binary needs neither a loadable Electron nor an executable target
arch, so assert it after the rebuild, beside the windows-process-tree
assertion that exists for the same reason: this is the addon copied into the
packaged app. Absent warns (a cross-platform rebuild need not leave a win32
addon on this disk); present and unmarked is fatal.

The fixtures now write a real addon file, because the gate reads the binary it
was told about rather than trusting the exports. Verified against the two real
binaries measured on the Windows host: the pre-#19068 build fails this path,
the build from current patched source passes.

* fix(windows): check the marker on every ConPTY path the packaged app can load

The packaged marker check read one hard-coded path, `build/Release/conpty.node`,
and warned when it was absent. `loadNativeModule` tries `build/Release`, then
`build/Debug`, then `prebuilds/win32-<arch>`, swallowing each failure, and
`prunePackagedNodePty` drops the published prebuild only when a same-arch
`build/Release` exists to replace it. So the two packages the check was added for
were the two it could not see:

- cross-host: no host but Windows can build conpty.node, so there is no
  `build/Release` and the prebuild is what ships. The check warned and returned.
- cross-arch: `build/Release` is the packaging host's own arch, patched and
  marked, so the check printed OK -- while the target app cannot load it and
  falls through to the unmarked prebuild underneath.

Measured, not assumed: both published Windows prebuilds in the node-pty tarball
contain neither `msys-2.0.dll` nor `cygwin1.dll` in any encoding. They are the
binary that leaks every MSYS pane child out of its job.

It now sweeps every candidate present for the *target* arch and refuses a package
with no candidate at all, which is a package with no ConPTY backend rather than a
layout to shrug at. It runs for every Windows slice instead of only the branch
the export check skips, so deleting the export check cannot silently take it too.
A stale source build keeps the rebuild advice; the prebuild gets the advice that
actually works, which is to package the slice on a Windows host of that arch.

Also: the marker constant was re-typed in four places and was tied to the C++
literal that produces it by nothing at all, so editing the patch would have left
a gate that fails every correctly rebuilt addon and tells the developer to do the
one thing that cannot help. The fixtures now take the constant from the gate, and
a test asserts the patch still adds `L"msys-2.0.dll"` to conpty.cc.

And the rebuild path treated a missing addon as a warning even on the host that
will run the install, where node-pty would fall through to that same prebuild.
The verdict is now a value, so it is tested without a platform gate.

* fix(windows): resolve the packaged ConPTY the way its loader does

Sweeping every candidate and demanding the marker on all of them was wrong in
the one case it was meant to make safe. `beforeBuild` runs
`rebuild-native-deps.mjs --platform=win32 --arch=<target>`, so a cross-arch slice
normally does get a patched `build/Release` for the target; `prunePackagedNodePty`
keeps the prebuild anyway because its guard is `electronArch === process.arch`
rather than the arch of the binary. That package is correct and its leftover
prebuild is never reached, and the sweep failed it -- telling whoever ran it to
package on a Windows arm64 host, which is both the wrong remedy and one no runner
here can offer.

Presence cannot separate that package from the one whose cross-arch rebuild
quietly emitted the host's architecture, because the only difference is the arch
of `build/Release`. So the gate now resolves the addon the way `loadNativeModule`
does -- first candidate whose PE `IMAGE_FILE_HEADER.Machine` matches the target,
walking root-then-lib for each layout in node-pty's own order -- and checks the
marker on the one that will actually run. A package with no candidate, or none of
the target's architecture, is refused: it has no ConPTY backend either way, and
the second is exactly what a silently host-arch cross-build looks like.

The PE machine reader already existed, privately, in the relay addon builder that
needed the same "a cross-build cannot silently emit host arch" guarantee. It is
now shared rather than copied.

Two seams were unreachable from anything but Windows, so nothing tested them:

- the afterPack hook's win32 block was an inline if/else that only a source-text
  assertion could inspect, and that assertion could not tell the difference
  between the check running and the check being wrapped in `try {} catch {}`. It
  is now `verifyPackagedWindowsNodePty`, and "the marker check runs even where
  the export check cannot" is four spied assertions instead of a string match.
- the rebuild path's verdict read `process` directly, so the branch that fires
  only on the host being rebuilt for was dead on every other host. It now takes
  the host as arguments, and the fs checks, the warning and the failure are all
  exercised from macOS.

Fixtures write a real PE header rather than `MZ fake addon`, since the gate now
reads one. The machine table is pinned to the documented IMAGE_FILE_MACHINE
values, because every fixture builds its header from that table and a table wrong
in both entries would otherwise agree with itself.

* fix(windows): say why the packaged ConPTY fell back, not just that it did

The previous commit resolved the addon by architecture but still had one message
for every way the resolution could land on the published prebuild. Those ways
want opposite remedies, and the one it printed was the remedy the commit before
it had just called wrong:

- no source build in the package at all — the slice has to be built somewhere
  that can build node-pty for the target arch.
- a source build that is there but is the packaging host's architecture, because
  the cross-arch rebuild did not honour `--arch` — re-running that rebuild is the
  fix, and "package on a Windows arm64 host" is neither necessary nor possible.

The second is the common one, since node-pty publishes a prebuild for both
Windows arches and prune keeps the target's on every cross-arch package. So the
old text fired mostly on the case it described least. It now reports which source
builds were skipped and the machine field each carried, and names the rebuild
command.

"Nothing the target can load" had the same problem in reverse: a zero-length or
truncated `conpty.node` got a cross-architecture diagnosis. Every candidate is
now named with what was actually read, including "not a PE image".

The rebuild path asserts the architecture too. A rebuild that ignored `--arch`
was otherwise only visible at packaging, two steps from the command that fixes
it. Arches with no known machine value are left unjudged rather than guessed at.

Two things the extraction broke or nearly broke, both found by mutation:

- the shared PE reader answers `null` where the relay builder's private copy
  returned a number, which would have turned its "node-gyp ignored --arch" error
  into a `TypeError`. Both callers now go through `describePeMachine`.
- the rebuild fixtures stage a script's co-located modules by walking its
  imports, and the walker only understood `from '...'` — so the gate's new
  `require('./windows-pe-machine.cjs')` was left behind and every subprocess test
  failed with a resolution error, which is the exact failure its own comment
  warns about. It now follows `require` and bare side-effect `import` as well,
  and has tests; the fixture stages the gate by walking it rather than by naming
  one file.

Fixtures write real PE headers through one shared builder instead of three
hand-rolled ones.

* fix(windows): run the node-pty addon gates on the Windows job that can

`rebuild-native-deps-node-pty.test.mjs` carries four `skipIf(platform !== 'win32')`
tests. The full suite runs on ubuntu, and the Windows PR job runs an explicit
file list that never named this file -- so those tests were skipped on Linux and
never reached anywhere else. Three of them predate this branch. The Windows job
is added the four node-pty addon suites plus the module-walker one; the comment
above that list already says why it is the right place, which is that the addon
assertions only hold once natives have been rebuilt. Running the path-joining
suites there also covers the separator this gate's candidate list is built from.

The rest is round-three review:

- the rebuild-time arch assertion told a reader "node-gyp did not honour --arch"
  about a file that was not a PE image at all, which is a truncated or
  quarantined artifact and a different command to run. The two now read
  differently, and neither claims the other's cause. Same fix the packaged gate
  had one commit ago, in the place that had not had it yet.
- the missing-addon error said node-pty "would load" a prebuild without checking
  it is there. It says "fall through to" now, which is true either way.
- `isLoadableByArch` had no caller left once the packaged gate started needing
  the raw machine field for its message. Removed rather than kept warm.
- each candidate's header is read once instead of up to three times.
- the module walker's comment claimed every shape that reaches a co-located
  module; it does not follow `projectRequire`/`requireLocal`, and it must not --
  those specifiers resolve against the project root, so following one stages the
  wrong path and the copy fails. Proven by trying: widening the pattern to
  require-shaped names broke nine tests on
  `projectRequire('./config/scripts/...')`. The comment now says what it follows
  and why it stops there.
- a new test resolved a file URL with `.pathname`, which keeps the drive-letter
  slash on Windows -- the very job this commit adds it to.

* docs(windows): put the superseded export-only gate in the past tense

It describes what used to pass a broken addon, so present tense reads as a
description of the gate the same document then explains replacing it.

* fix(windows): repair what running the node-pty suites on Windows exposed

Putting these files on the Windows job turned four assertions red on the first
run. Three of them were in tests that carried `skipIf(platform !== 'win32')` and
had therefore never executed anywhere, on any branch.

- `writeFakeElectronRebuild` emitted the `windows-process-tree` addon a real
  rebuild leaves but never node-pty's, so every Windows test of the rebuild path
  ran against a tree no real rebuild can produce: node-pty "rebuilt" with nothing
  in `build/Release`. The new same-host check reads that state correctly and said
  so. The fake rebuild now writes `build/Release/conpty.node` when it was asked
  to rebuild node-pty for win32, with the marker and the target machine.
- `mkTempProject` never staged `windows-process-tree-creation-time.cjs`. The
  rebuild script reaches it through `projectRequire`, which resolves against the
  project root, so the module walker cannot follow it and must not try. Staged by
  name, with a comment saying which of the two it is. Without it the
  windows-process-tree probe failed to load its own checker and the module joined
  `modulesToRebuild`, which is the second and third red assertion.
- the two `nodePtyAddonPath` cases compared against a literal POSIX string.
  `resolve` returns a drive letter and backslashes on Windows, so they could only
  ever pass off it. Built from segments now, which still pins the `..` traversal
  that is the point of the test.

Verified on macOS: ensure-native-runtime-job-ownership,
verify-packaged-node-pty-job-ownership, windows-pe-machine,
script-module-dependencies, rebuild-native-deps-node-pty, rebuild-native-deps,
rebuild-native-deps-windows-process-tree, ensure-native-runtime -- 109 passed, 6
skipped. The 6 are the Windows-gated rebuild tests, which is the job this change
is aimed at; Windows CI is the arbiter.

* fix(windows): give the packaged fallback a third verdict, for a file that is no image

The packaged gate had two remedies for landing on the published prebuild and
picked between them on `!prebuilt`, which puts a truncated, empty or quarantined
`build/Release/conpty.node` in the cross-arch bucket: "the source build beside it
is the wrong architecture ... re-run with --arch". It is not the wrong
architecture, it is not an architecture, and `--arch` is not the command. The
rebuild-path gate was split for exactly this a commit ago; this is the same split
in the place that had not had it.

Also from review of the settled state:

- the stale-source-build branch ended in a call that happened to throw, so a
  reader could not see it was terminal and the file was read twice to get there.
  The verdict is now an Error the caller throws, built once from the read it
  already did, and shared with `assertCygwinBreakawayDenied` rather than copied.
- four injection seams had no consumer in production or in tests
  (`deniesBreakaway`, `peMachine`, and `exists`/`peMachine` on the rebuild
  verdict). An unused seam is a way for the tested path and the real one to drift
  apart; the tests drive both with real files. Removed.
- the loader table existed in a docblock and in the reference doc, already
  disagreeing about row four. The docblock cites the doc now.
- `peImage` stamped machine `0x0000` for an arch it had no value for, because
  `writeUInt16LE(undefined)` coerces to zero. A fixture that quietly invents the
  field the gates read is the same species of silent lie the gates exist to
  catch; it throws, and a test holds it to that.
- a test named for refusing an unreadable candidate asserted only that something
  threw. Renamed to what it proves.

* fix(windows): make the rebuild fixtures represent a tree that can exist

Second round of what running these suites on Windows exposed. The module the
walker could not stage is now staged, so the probe reached its own checker and
the real reasons surfaced:

- `writeFakeWindowsProcessTree` exported `{}`. The creation-time gate reads
  `supportedProcessDataFlags` off the addon and calls its absence "the tarball
  prebuilt, not a build of the patched source" — correctly. The fixture predates
  that gate and, being Windows-only, never met it. The healthy fake now reports
  the flag, taken from the gate's own constant. Two tests were failing on this,
  the second only because the module then joined `modulesToRebuild`.
- `rebuilds a loadable ConPTY native that lacks Orca job ownership` asked for a
  node-pty rebuild in a tree where node-pty had none of the payload its package
  ships. It gets `writeFakeNodePtyConptyPayload` like its two siblings.

I also tried making the fake rebuild emit `build/Release/conpty.node` the way a
real one does, and backed it out: `restoreNodePtyWindowsConptyRuntime` keys off
that file and then reads `third_party/conpty`, so emitting it in a tree without
the package payload turns one honest gap into an ENOENT two steps away. The
payload fixture is where "node-pty has its addon" belongs.

macOS: ensure-native-runtime-job-ownership, verify-packaged-node-pty-job-ownership,
windows-pe-machine, script-module-dependencies, rebuild-native-deps-node-pty,
rebuild-native-deps, rebuild-native-deps-windows-process-tree,
ensure-native-runtime — 112 passed, 6 skipped. The 6 are the Windows-gated
rebuild tests; Windows CI is the arbiter and is why they are on that job now.

* fix(windows): register the node-pty addon suites in the scope list too

Putting the five suites in the Windows lane's vitest argv gets them run once the
job starts; `WINDOWS_PACKAGE_TESTS` in `pr-code-change-scope.mjs` is what decides
whether the job starts at all. Only the argv was updated, so a PR touching just
`rebuild-native-deps-node-pty.test.mjs` would not have started the Windows job,
and its four Windows-only cases — including the same-host-absent one added here —
would have run on no machine for that PR. Exactly the shape of gap this branch is
about. Both lists now name all five, and `windows-pe-machine`,
`windows-pe-image-fixture` and `script-module-dependencies` join
`NATIVE_RUNTIME_PREFIXES` so a change to the modules themselves starts it too.

`win32-test-lane-registration.test.mjs` exists to catch precisely this and did
not, because its matcher only recognises suite-level gates (`describe.runIf` /
`describe.skipIf`) and a `.win32.` filename. These tests gate per `it`. Widening
it is not this branch's change to make: about thirty files across the repo carry
per-`it` Windows gates and are unregistered, so the ratchet would move far beyond
node-pty. Flagged rather than done.

Message repairs from the same review:

- the non-PE arm of the rebuild-time arch error read "... is not a PE image, so
  nothing can load it, so node-pty would fall back ...". The shared consequence
  clause already opens with ", so".
- the no-source-build packaging error ended "Package this Windows slice on such a
  host", which is wrong advice for the case where the host IS such a host and the
  rebuild simply left nothing — reachable when the artifact is removed before
  prune runs. It now names both readings and points at the beforeBuild output.
- the relay-addon builder blamed `--arch` for a build output that is not a PE at
  all, the same guess the node-pty gate was taught to stop making.
- the patch-drift assertion was a bare `toBe(true)`, so a real drift read as
  "expected false to be true". It now names the two things that can have drifted
  and what happens until they agree.
2026-09-16 22:23:30 -07:00
..