`Start-UiServer` printed the -SelfTestUi URL (and opened the browser window)
as soon as the TcpListener was bound, but the runspace that answers /progress
starts asynchronously — BeginInvoke returns before the pipeline is open and
the script block is JIT'd, which is seconds on a loaded runner. The kernel
accepted connections into the backlog during that gap and nobody answered
them. The self-test hit it three times (#90371 and two follow-ups each
widened a timeout instead of removing the race) and it just failed an
unrelated hermes_state.py PR (run 33591547099, two 5s stale-backlog
timeouts = red).
- windows.ps1: readiness handshake after BeginInvoke — one /progress
round-trip must succeed (≤15s) before the server is returned; on failure
tear the listener down and continue without UI. The URL now means
"serving", not "bound". Also fixes the browser opening to a page that never
loads on a slow machine.
- test: 1s per-attempt probe timeout so a single dead backlog socket cannot
consume half the readiness budget.
- CI: new `desktop_updater` classifier lane. tests/test_desktop_update_windows_*.py
spawn the real PowerShell script; the Windows-only job now runs them only
when scripts/desktop-update/**, the Electron updater launcher, conftest,
pyproject, or those tests change (push/dispatch fail open). A PR that
never touched that surface cannot be failed by its process timing.
The `${{ false && (...) }}` if-expression on the reusable-workflow
e2e-desktop job made GitHub's workflow parser fail at startup (annotation:
"An unexpected error has occurred"), so every ci.yaml run on main and
every PR dispatched 0 jobs. Discriminator on this branch: pre-24f5a60
blob → 26 jobs; paren-relocated && form → 0; bare if: false → 25.
Lane stays disabled; comment documents the re-enable line.
Linux is case-sensitive; Windows and macOS are not. Two tracked paths
differing only by case (README.md vs readme.md, src/Foo.py vs SRC/foo.py)
land fine on Linux and silently break every clone on a case-insensitive
host — the filesystem holds one, so checkout fails or whichever wins
clobbers the other. Git won't stop the pair from landing; it only warns
at checkout time on a case-insensitive FS. This is the enforcement point.
Adds scripts/check-case-collisions.py (index scan keyed on casefolded
full paths) + an unconditional workflow_call job wired into ci.yaml and
the all-checks-pass gate — unconditional because a collision can ship in
any kind of PR (docs, JS, config), not just Python, so gating on a
language lane would be the same passive-rule trap the infographic check
closes. Tests in tests/scripts/test_case_collision_check.py build
collisions via git update-index --cacheinfo so they run on
case-insensitive filesystems too.
The lane was disabled Aug 2 2026 (#76627) because the mock-backend
Electron window never got a title after the Aug 1 engines/npm churn
(#76499/#76562/#76575), failing every PR identically. #99671 fixed the
root cause: per-platform/layout Electron binary resolution in the e2e
harness (apps/desktop/e2e/electron-binary.ts). The suite is green again
on Node 26 + npm 12 — delete the temporary `false &&` guard and update
the stale comment block.
Fixes#76627
Route automatic profile exports to a managed store instead of the current checkout, and enforce a CI/Docker boundary that rejects archive files before they can be published.
Every Linux lane that does real work ran on a 4-core `ubuntu-latest`. The
Python suite and the JS checks were split into many small jobs to make that
size usable. Each split job repeated the full setup. In most of the JS jobs
the repeated setup cost more than the work.
The work lanes move to larger runners. Then the splits that existed only to
make small runners usable go away.
Python tests: 12 slices become 1 job on a 96-core runner. Slicing cost a
matrix job, a duration cache, a per-slice artifact and a merge job. 96 cores
clear the floor that the slowest single test file sets, which is about 82s. A
second slice divides work that is already at that floor, and adds a second
setup. Duration data from run 32522943054 gives the numbers behind this: 3178
files, 11645s in series.
The worker count is explicit, because `run_tests.sh` defaults to twice the
core count. A later commit sets it from a measurement on this hardware.
JS checks: 14 jobs become 1. The matrix paid about 371s of repeated setup to
spread about 612s of work. One larger runner installs one time. The three UI
shard scripts and `run-ui-shard.mjs` are therefore removed, because the
unsharded `test:ui` covers the same tests.
The unit of parallel work inside that job is a CHECK, and not a workspace.
apps/desktop is most of the payload, and its own `check` is a serial && chain.
A spread across workspaces alone therefore leaves that chain as the long pole.
A package that declares `check:*` sub-scripts gives one unit for each
sub-script. That is the same selection rule the matrix used.
The loop lives in `.github/scripts/run-workspace-checks.mjs`, so the same
sequence runs on a laptop. It runs 11 units together, buffers the output of
each one, and fails at the end with the full list. Children that share one
stdout interleave their lines and make a failure hard to read.
`npm run --ws check` stops at the first workspace that fails.
`check:test:plugins` joins the desktop `check` script. The matrix prefers
`check:*` sub-scripts over the plain `check` script, so `check:test:plugins`
ran only as its own leg. Without this change the merge drops that suite and
the job stays green.
node_modules is cached on the lockfile, and `npm ci` is skipped on an exact
hit. The `cache: npm` option of `setup-node` caches only the ~/.npm tarball
cache, which leaves the extract and the postinstalls to pay again.
The arm64 image build stays on a native arm64 runner. A build of linux/arm64
on an x64 host uses emulation.
The docker test lane caps its workers at the core count. Each of those tests
drives a container, so the docker daemon sets the limit and not the processor.
`.github/actionlint.yaml` declares the runner labels. actionlint knows the
GitHub-hosted labels only, and an undeclared label reads as an error that
hides the real findings.
The `detect` job checks out one file through a sparse checkout, and its
timeout drops to 1 minute. It reads
`scripts/ci/classify_changes.py` and nothing else.
Verification:
- actionlint reports 9 findings across all workflows. An unmodified HEAD with
the same config reports the same 9. This change adds none.
- A wrong label still fails. actionlint reports `ubuntu-latest-32-cor` and
`ubuntu-latest-32-arm-cores`.
- Every changed workflow parses, and `name` parses as a string.
- A replay of the `save-durations` merge step against a three-artifact layout
returns all 3178 entries.
- An expansion of the npm script graph gives the same leaf commands for the
parallel units and for a plain `npm run check`, in both directions. Against
the 13-leg matrix the count is 13 to 11, and the whole difference is the
three UI shards that collapse into one unsharded `check:test:ui`.
- `--list` reports the 11 units, and a full local run completes and reports
the time of each unit.
- The runner labels cannot be verified here. The first real run is the test.
The lane shipped dead. `classify_changes.py` emitted `rust`, the composite
action re-exported it, and ci.yaml's `rust-tests` job gated on
`needs.detect.outputs.rust` — but the `detect` job never declared that
output, so the expression was the empty string and the job reported
"skipping" on the very PR that added it. GitHub does not error on a
reference to an output a job never declared, so nothing went red.
Adds the missing line plus the invariant that catches the whole class:
every `needs.detect.outputs.X` referenced by a job's `if` must be
declared by `detect`. Verified it fails with the line removed.
The related check — every lane reaching the composite action — is
separate on purpose: nix.yml and docker.yml own their triggers and
re-export different subsets, so `docker` and `nix` are legitimately not
ci.yaml detect outputs.
Nothing in CI compiled this crate. `.rs` lives under `apps/`, so the
change classifier matched a Rust edit as `frontend` and ran the
TypeScript matrix, which cannot notice a Rust error — the crate's 58 unit
tests had never executed once, and neither would the pipe-drain tests in
the previous commit.
Adds a `rust` lane and a Linux `cargo test --lib` job. Linux on purpose:
the pipe-drain fixtures need a real process tree whose grandchild
inherits the parent's stdout and are `#[cfg(unix)]`, so a Windows runner
would compile them out and report green over zero coverage. The Windows
half of that contract is `-SelfTestPipeDrain` on the existing Windows
lane.
Teknium