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feat(prettier-plugin-toml): migrate from @tombi-toml/wasm-lib to @tombi-toml/lib - #530
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…/lib binding The `--target web` wasm build had to be loaded by hand: `init()` fetches `tombi_wasm_bg.wasm` relative to its own module, which Node cannot do for a `file:` URL, and its `exports` map exposes neither the wasm file nor `package.json`. The native binding ships a prebuilt `.node` per platform instead, so the shim and its `@dual-bundle/import-meta-resolve` dependency go away. Node.js v20.0.0 or later is required, matching the engine range declared by `@tombi-toml/lib`.
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Merge Risk: 🟡 Moderate · up to
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The title clearly and concisely describes the main change: migrating prettier-plugin-toml from @tombi-toml/wasm-lib to @tombi-toml/lib. |
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Up to standards ✅🟢 Issues
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| Metric | Results |
|---|---|
| Complexity | -5 |
| Duplication | 0 |
🟢 Coverage ∅ diff coverage · +0.25% coverage variation
Metric Results Coverage variation ✅ +0.25% coverage variation (-1.00%) Diff coverage ✅ ∅ diff coverage Coverage variation details
Coverable lines Covered lines Coverage Common ancestor commit (f812a57) Report Missing Report Missing Report Missing Head commit (aeede54) 342 (-16) 318 (-14) 92.98% (+0.25%) Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch:
<coverage of head commit> - <coverage of common ancestor commit>Diff coverage details
Coverable lines Covered lines Diff coverage Pull request (#530) 0 0 ∅ (not applicable) Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified:
<covered lines added or modified>/<coverable lines added or modified> * 100%1 Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct.
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prettier-plugin-autocorrect
prettier-plugin-pkg
prettier-plugin-sh
prettier-plugin-sql
prettier-plugin-toml
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #530 +/- ##
==========================================
+ Coverage 91.93% 92.25% +0.31%
==========================================
Files 13 12 -1
Lines 434 413 -21
Branches 112 108 -4
==========================================
- Hits 399 381 -18
+ Misses 34 31 -3
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`@tombi-toml/lib` is CommonJS, so the ESM build and the CJS build can both import it the ordinary way. The dynamic `import()` was only ever needed because `@tombi-toml/wasm-lib` is ESM-only -- its `exports` map has no `require` condition -- so the CommonJS bundle could not load it at all. This also drops the promise cache and the `typeof import()` alias.
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Code Review ✅ Approved🟡 Medium risk · Replacing WASM with platform-specific native bindings and requiring Node 20 could prevent TOML formatting on unsupported platforms or Node 18. Migrates prettier-plugin-toml from VerificationRules No rules evaluated Functional validation Not enabledAuto-approval Approved For more verification details, comment OptionsAuto-apply is off → Gitar will not commit updates to this branch. Comment with these commands to change the behavior for this request:
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Inline comments:
Review comments at @packages/toml/src/index.ts:
- Line 1: Remove the runtime static import of `@tombi-toml/lib` and cache a
dynamic import, awaiting it inside `format()` before calling the native
formatter. Keep `Diagnostic` as a type-only import so loading the plugin does
not require the platform binary.
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What
prettier-plugin-tomlnow formats through the native@tombi-toml/libNode.js binding instead of@tombi-toml/wasm-lib.Why
The WASM build needed a 41-line loading shim: it is a
--target webbuild whoseinit()fetch()estombi_wasm_bg.wasmrelative to its own module, which Node does not support forfile:URLs, and itsexportsmap exposes neither the wasm file norpackage.json. The shim resolved the JS entry through@dual-bundle/import-meta-resolveand then read the ~6.6 MB wasm file by hand. The native binding needsnone of that —
@tombi-toml/libselects a prebuilt.nodefor the platform itself.Changes
@tombi-toml/wasm-lib→@tombi-toml/lib@dual-bundle/import-meta-resolve, which only the shim usedpackages/toml/src/wasm.tsimport { format } from '@tombi-toml/lib'. TheinitSynccall, theloadWasm()helper and theTombiWasmInitinterface — which worked around the wasm build's extensionless.d.tsre-export, a pathmoduleResolution: node16cannot follow — are all gone, as is the promise-cachedloadTombi(). The oldcode reached the wasm build through
await import()because that build is ESM-only: itsexportsmaphas no
requirecondition, sorequire('@tombi-toml/wasm-lib')throwsERR_PACKAGE_PATH_NOT_EXPORTED, and the CommonJS bundle could not load it at all.@tombi-toml/libisCommonJS, so the ordinary import works in both bundles —
require('@tombi-toml/lib')inlib/index.cjs.engines.node>=18.0.0→>=20.0.0, matching what@tombi-toml/libdeclaresmajorchangesetThe public options, the tombi configuration discovery and the formatting behaviour itself are unchanged;
the fixture snapshots are untouched.
Notes
^1.8.4rather than^1.8.5because 1.8.5 was published inside thenpmMinimalAgeGatewindow this repo enables; Yarn refused it with All versions satisfying "^1.8.5" are quarantined. The
published 1.8.4 and 1.8.5 differ only in the version string and the matching optional-dependency pins —
the JS entry,
index.d.tsandbinding.d.tsare byte-identical — so renovate picking 1.8.5 up laterchanges nothing for this code.
than only when a
.tomlfile is formatted.@tombi-toml/libships prebuilt binaries for Linux, macOSand Windows on
x64/arm64(glibc and musl) as optional dependencies, so that only bites an installthat explicitly drops them.
Verification
yarn test— 104 tests pass, andpackages/toml/test/__snapshots__/fixtures.spec.ts.snapisunmodified, so both the formatted output and the
invalid.tomldiagnostic/code frame are byte-identicalto what the WASM build produced.
yarn lint:tsc,yarn lint:es,yarn typecov(100.00%)yarn build—@tombi-toml/libstays external in both bundles, and the built ESM and CJS entry pointseach format through Prettier 3.
yarn install --immutable— the lockfile carries all eight platform binaries with theirconditions,so the macOS and Windows legs resolve it too.
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