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build: check Svelte on the native TypeScript API and lint in parallel - #2227
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info
📝 Walkthrough
Merge Risk: ⚪ Minimal · up to The lint pipeline catches an empty TypeScript include, and the patched svelte-check version is pinned. No actionable merge-blocking risk remains. Pre-merge checks |
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| Check name | Status | Explanation | Resolution |
|---|---|---|---|
| Docstring Coverage |  |
Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 1 files. (1 skipped: 1… | Write docstrings for the functions missing them to satisfy the coverage threshold. |
✅ Passed checks (4 passed)
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Check name Status Explanation Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request. Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely describes the main changes: checking Svelte through the native TypeScript API and running lint tasks in parallel.
Full details: Docstring Coverage
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Explanation
Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 1 files. (1 skipped: 1 unsupported.)
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Inline comments:
Review comments at @package.json:
- Line 76: Update the svelte-check dependency declaration in package.json to pin
it to version 4.7.6, matching the version targeted by the existing patch entry.
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e1cfe2a7-b7b0-4630-af36-a59865bb5a9e
⛔ Files ignored due to path filters (1)
pnpm-lock.yamlis excluded by!**/pnpm-lock.yaml
📒 Files selected for processing (6)
.github/dependabot.ymlAGENTS.mdpackage.jsonpatches/svelte-check@4.7.6.patchtests/tooling/svelteCheck.test.tstooling/README.md
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`pnpm run check` now runs `svelte-check --tsgo-experimental-api`, which type-checks every .ts and .svelte file through TypeScript 7's native API. A pnpm patch backports sveltejs/language-tools#3133 (merged, unreleased), so a native compiler that cannot start, crashes, or is killed fails the check instead of exiting 0. Dependabot skips svelte-check, because pnpm refuses to install with the patch once the version moves; the 4.7.7 upgrade deletes the patch by hand. `pnpm lint` runs lint:native, lint:svelte, lint:tsconfig, and check concurrently with pnpm's default bail, which exits with the first failure's code. build-with-lint no longer runs a separate full `tsc -noEmit`, because check type-checks the same program. lint:tsconfig (`tsc --noEmit --noCheck`) fails when the tsconfig matches no input files, which svelte-check's API path reports as a clean run. The svelte-check test now covers warnings on their own, components that do not parse, imports of deleted components, and a native compiler that dies after it starts.
a07221b to
0634225
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Ship verification: PASS+NOTES Independently verified in fresh detached head and parent worktrees, using the real pnpm scripts. No implementation changes. Head SHA: 0634225
Note: check alone still accepts an empty tsconfig input set. This is the documented limitation requested for verification; lint and build-with-lint correctly reject it. No additional shipping blockers found. All injected changes are restored; the two verification worktrees will be removed after posting this comment. |
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Summary
pnpm run checkandpnpm run build-with-lintare fast again, and they fail closed. #2224 madecheckfast withsvelte-check --tsgo, but svelte-check 4.7.6 exits 0 when the native compiler is missing, crashes, or is killed. #2225 closed that hole by movingcheckback to the TypeScript 6 checker, which made it about 3.5x slower on CI.This PR runs
checkon TypeScript 7's native API (svelte-check --tsgo-experimental-api). A pnpm patch backports the upstream exit-status fix, sveltejs/language-tools#3133, which is merged but not released.lintnow runs its checks in parallel.Measured on one GitHub runner, 8 rotating rounds per side (bench run 38288422505, commit 3e14dd0; later commits change only tests and docs):
pnpm run checkpnpm run build-with-lintOn the same runner class, #2224's scripts measured 4.09 s for
checkand 11.59 s forbuild-with-lint(bench run 38279836247). Sobuild-with-lintbeats #2224, andcheckalone is about 1.4 s slower than #2224. "Why this path" explains that gap.Changes
checkissvelte-check --tsgo-experimental-api --fail-on-warnings. It type-checks every.tsand.sveltefile in the tsconfig program with the native compiler, and it reports the Svelte compiler's warnings.patches/svelte-check@4.7.6.patchis upstream commit af7c6a5 (#3133), unchanged in compiled form. The CLI's top-levelcatchnow exits 1, and a compiler process that dies or exits non-zero without diagnostics rejects the run. Before the patch, the API path exited 0 when the native compiler could not start.lintispnpm run "/^(lint:.+|check)$/". pnpm 10.32.1 runs the matched scripts concurrently. On the first failure it stops the others and exits with that script's code.--no-bailexits 0 when a script fails, so AGENTS.md warns against it.build-with-lintispnpm lint && node esbuild.config.mjs production. It no longer runs a separate fulltsc -noEmit, becausechecktype-checks the same program.New
lint:tsconfig(tsc --noEmit --noCheck) fails with TS18003 when the tsconfig matches no input files. svelte-check's API path reports that case as a clean run. It costs 0.28 s ofbuild-with-lint. A full paralleltsccost 2.1 s.svelte-checkis pinned to exactly 4.7.6, and Dependabot skips it. Once the patched version is no longer installed, pnpm refuses to install (ERR_PNPM_UNUSED_PATCH, checked on 10.32.1), which would block the whole dev-dependency group. The next svelte-check upgrade must delete the patch by hand.tests/tooling/svelteCheck.test.tsruns thecheckcommand in temporary workspaces. It requires exit 1 for:.tsimport of a deleted component,A further case requires
lintto selectlint:tsconfig, and that script to fail on an emptyinclude. Each case fails under a configuration that lets its defect through:--tsgois unpatched--tsgoruns with every local fix--fail-on-warningsis removedincludelintdropslint:tsconfigWhy this path
I compared six setups. Each ran a failure-mode matrix of 21 scenarios through the real
pnpm run checkandpnpm run build-with-lint. A cell is open when the gate exits 0 although it should fail.checkbuild-with-lintcheck, in components nothing imports--tsgo) with atsc --versionpreflight--tsgo, parallel lint, 4 local fixes.tsimport of a deleted or renamed componentcheckrun alone on an emptyinclude, whichlintcatchesTimes come from one runner, 6 rounds each (bench run 38282284345). Rows marked * come from bench run 38279836247, on a slower runner. svelte-check-native's timed runs were replay-cache hits, so they are left out. "This PR" in that run predates
lint:tsconfig.--tsgocannot report a missing component, because svelte's own types declaremodule '*.svelte'. The language server blanks that declaration, so TS6 and the API path report TS2307. Nativetscreading--tsgo's overlays cannot.The API path costs about 0.7 s more than
--tsgoforcheck. svelte-check gives the native server a file-system proxy, so every file lookup during module resolution becomes a synchronous call back into Node. A CPU profile shows 2.5 s of 4 s on the main thread blocked in that channel. Fixing that is an upstream change.Testing / validation
Fresh worktree:
pnpm install --frozen-lockfile, thenpnpm run build-with-lintexits 0.pnpm run test: 501 files, 7,021 tests passed, 28 skipped.main.jsandstyles.cssare byte-identical to master:main.js: d83aa6eeaa77bbcfe0e3574f3ab1e67c57469506074c43f5e67087bf64ae6127styles.css: 9467ef3622cd1137ce5a0148e16de23b9f5be87bc8c204fb6050c48f8f29994dThe failure-mode matrix on 3e14dd0, through the real scripts. Every cell that must fail exits non-zero except
checkrun alone on an emptyinclude. That covers a missing, unresolvable, crashing (exit 2), or SIGKILLed native compiler, with and without a type error. A missing compiler also fails on a clean tree. A component nothing imports is now checked for warnings, parse errors, and type errors, which master did not do.CI's "Run build with lint" step: 39 s before build(deps): adopt native tooling and replace ESLint #2224, 12 s on build(deps): adopt native tooling and replace ESLint #2224, 20 s on build: run svelte-check on TypeScript 6 and guard svelte/internal in .ts files #2225, and 7 to 11 s on this branch (median 8.5 s over 4 runs). The whole Build + Lint job took 54 s on build: run svelte-check on TypeScript 6 and guard svelte/internal in .ts files #2225 and 32 to 50 s here.
Two adversarial review rounds (Claude Fable 5.1, GPT-6 Astra) found:
--fail-on-warnings,tsc.All five are fixed here.
Platform Test (macOS, Windows) runs only on master pushes or
workflow_dispatch, so I dispatched it on this branch. Both pass on a07221b (run 38291748711); the head after that only pins svelte-check's version. The first dispatch failed on macOS only because the test compared full file paths, so the test now compares base names.One cosmetic macOS difference. On a case-insensitive file system the API path prints Svelte compiler warnings under a lowercased path, such as
../../../../../users/runner/work/quickadd/quickadd/src/gui/choicebuilder/components/labeledfield.svelte. TypeScript errors keep the real path, the path still opens on macOS, and exit codes and counts are unchanged. Probe run: 38291272335. It is upstream behavior, so this PR carries no local fix. I drafted an upstream issue but have not filed it.Release impact: none. The bundle is unchanged, and
build:requests no release.Checklist
Note
Run svelte-check on the native TypeScript API and lint in parallel
pnpm run lintnow uses a pnpm regular expression to run alllint:*scripts pluscheckin parallel, including the newlint:tsconfigscript that catches empty tsconfig input programspnpm run checkruns svelte-check through its experimental TypeScript API path, with svelte-check pinned to 4.7.6 and patched so compiler failures reject with the compiler's output; the patch also makes caught top-level failures exit with status 1pnpm run build-with-lintnow waits forpnpm lintinstead of running a standalone TypeScript command before bundlingMacroscope summarized 0634225.
Summary by CodeRabbit