feat: add hidden `resolve_tsconfig` function for Vite by sapphi-red · Pull Request #8257 · rolldown/rolldown

sapphi-red · 2026-02-09T13:26:56Z

This PR adds a hidden resolve_tsconfig function for vitejs/vite#21577. This will improve the consistency.

This function is only used in the deprecated transformWithEsbuild function, which will be removed in the next major version of Vite. We can remove this function once that is removed.

sapphi-red · 2026-02-09T13:27:28Z

feat: add hidden resolve_tsconfig function for Vite #8257 👈 (View in Graphite)
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netlify · 2026-02-09T13:29:08Z

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crates/rolldown_binding/src/transform.rs

Copilot

Pull request overview

Adds a hidden resolveTsconfig binding intended for Vite’s deprecated transformWithEsbuild, to make tsconfig resolution behavior more consistent with Rolldown’s existing tsconfig handling.

Changes:

Expose a new N-API function resolveTsconfig via the experimental JS entrypoint and generated WASI/native binding shims.
Add TypeScript declaration types for the returned tsconfig shape (BindingTsconfigResult / compiler options).
Add Vitest coverage + fixtures for basic resolution, caching, and extends behavior.

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/rolldown/tests/utils/resolve-tsconfig.test.ts	Adds tests for `resolveTsconfig`, cache usage, and extended tsconfig behavior.
packages/rolldown/tests/utils/fixtures/extends/tsconfig.json	Adds an `extends` tsconfig fixture for inheritance coverage.
packages/rolldown/tests/utils/fixtures/extends/test.ts	Adds a TS source fixture used for tsconfig resolution.
packages/rolldown/src/rolldown-binding.wasi.cjs	Exposes `resolveTsconfig` in the WASI CJS binding shim.
packages/rolldown/src/rolldown-binding.wasi-browser.js	Exposes `resolveTsconfig` in the WASI browser binding shim.
packages/rolldown/src/experimental-index.ts	Re-exports `resolveTsconfig` from the experimental entrypoint.
packages/rolldown/src/binding.d.cts	Adds TS type declarations for `resolveTsconfig` and its result types.
packages/rolldown/src/binding.cjs	Exposes `resolveTsconfig` from the native binding.
crates/rolldown_binding/src/transform.rs	Implements the new N-API `resolve_tsconfig` and binding structs for tsconfig output.
crates/rolldown_binding/Cargo.toml	Adds `indexmap` dependency to support `paths` mapping output.
Cargo.toml	Enables `napi` feature needed for IndexMap object interop.
Cargo.lock	Updates lockfile for the new dependency.

crates/rolldown_binding/src/transform.rs

packages/rolldown/tests/utils/resolve-tsconfig.test.ts

sapphi-red · 2026-02-09T13:39:20Z

Merge activity

Feb 9, 1:39 PM UTC: The merge label 'graphite: merge-when-ready' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
Feb 10, 1:41 AM UTC: sapphi-red added this pull request to the Graphite merge queue.
Feb 10, 1:53 AM UTC: Merged by the Graphite merge queue.

github-actions · 2026-02-09T13:42:42Z

Benchmarks Rust

target: main(9a5231f)
pr: 02-09-feat_add_hidden_resolve_tsconfig_function_for_vite(4994992)

group                                                        pr                                     target
-----                                                        --                                     ------
bundle/bundle@multi-duplicated-top-level-symbol              1.00     65.2±1.60ms        ? ?/sec    1.02     66.7±1.72ms        ? ?/sec
bundle/bundle@multi-duplicated-top-level-symbol-sourcemap    1.00     70.3±1.10ms        ? ?/sec    1.03     72.8±1.50ms        ? ?/sec
bundle/bundle@rome_ts                                        1.00     96.7±1.54ms        ? ?/sec    1.01     97.9±1.81ms        ? ?/sec
bundle/bundle@rome_ts-sourcemap                              1.00    107.9±2.21ms        ? ?/sec    1.02    110.0±1.64ms        ? ?/sec
bundle/bundle@threejs                                        1.01     34.6±2.06ms        ? ?/sec    1.00     34.3±0.46ms        ? ?/sec
bundle/bundle@threejs-sourcemap                              1.00     38.8±0.76ms        ? ?/sec    1.01     39.3±0.59ms        ? ?/sec
bundle/bundle@threejs10x                                     1.00    351.1±2.59ms        ? ?/sec    1.01    355.4±5.63ms        ? ?/sec
bundle/bundle@threejs10x-sourcemap                           1.00    407.8±4.04ms        ? ?/sec    1.00    409.1±4.84ms        ? ?/sec
scan/scan@rome_ts                                            1.01     78.7±1.47ms        ? ?/sec    1.00     77.9±1.37ms        ? ?/sec
scan/scan@threejs                                            1.00     27.1±0.35ms        ? ?/sec    1.00     27.0±0.37ms        ? ?/sec
scan/scan@threejs10x                                         1.00    276.8±4.34ms        ? ?/sec    1.00    277.1±4.27ms        ? ?/sec

This PR adds a hidden `resolve_tsconfig` function for vitejs/vite#21577. This will improve the consistency. This function is only used in the deprecated `transformWithEsbuild` function, which will be removed in the next major version of Vite. We can remove this function once that is removed.

@sapphi-red

## [1.0.0-rc.4] - 2026-02-11 💡 Granular `comments` Option - New `output.comments` option provides fine-grained control over comment preservation - The `output.legalComments` option is now deprecated and use `comments.legal` instead ### 🚀 Features - rename error name to `RolldownError` from `RollupError` (#8262) by @sapphi-red - add hidden `resolve_tsconfig` function for Vite (#8257) by @sapphi-red - rust: introduce `rolldown_watcher` (#8161) by @hyf0 - unify `comments` and `legalComments` into a single granular `comments` option (#8229) by @IWANABETHATGUY - add builtin plugin for visualizing chunk graph (#8162) by @IWANABETHATGUY - show import declaration location in AssignToImport errors (#8222) by @Copilot - show import declaration span in CannotCallNamespace error (#8223) by @Copilot - emit error when plugin accidentally removes runtime module symbols (#8203) by @IWANABETHATGUY - support tsconfig loading & inputMap for `transform` (#8180) by @sapphi-red - rolldown_plugin_vite_reporter: update warning message to link to Rolldown docs (#8205) by @sapphi-red ### 🐛 Bug Fixes - avoid panic on untranspiled JSX syntax by reporting a diagnostic error (#8226) by @IWANABETHATGUY - rolldown_plugin_vite_import_glob: relax absolute path check and improve invalid glob warning (#8219) by @shulaoda - merge chunks after detect circular reference (#8154) by @IWANABETHATGUY - rust: detect runtime module side effects based on its content (#8209) by @hyf0 ### 🚜 Refactor - rename `other` to `jsdoc` in comments options (#8256) by @IWANABETHATGUY - rename chunk-visualize plugin with bundle-analyzer plugin (#8255) by @IWANABETHATGUY - remove EXPORT_UNDEFINED_VARIABLE error (#8228) by @Copilot - consolidate missing runtime symbol errors into a single diagnostic (#8220) by @IWANABETHATGUY - stabilize `parse` and `parseSync` (#8215) by @sapphi-red - return errors instead of panicking on builtin plugin conversion failure (#8217) by @shulaoda - expose `parse` / `minify` / `transform` from `rolldown/utils` (#8214) by @sapphi-red - prepare defer chunk merging (#8153) by @IWANABETHATGUY ### 📚 Documentation - remove `<script>` escape behavior difference note from `platform` option (#8253) by @sapphi-red - TypeScript & JSX support by plugins (#8183) by @sapphi-red ### 🧪 Testing - ensure runtime module is preserved even if it's not used but has side effects (#8213) by @hyf0 ### ⚙️ Miscellaneous Tasks - deps: update oxc to v0.113.0 (#8267) by @renovate[bot] - deps: update dependency oxlint-tsgolint to v0.12.0 (#8272) by @renovate[bot] - deps: update oxc apps (#8269) by @renovate[bot] - deps: update test262 submodule for tests (#8261) by @sapphi-red - deps: update crate-ci/typos action to v1.43.4 (#8260) by @renovate[bot] - deps: update dependency esbuild to v0.27.3 (#8250) by @renovate[bot] - deps: update rust crates (#8244) by @renovate[bot] - deps: update dependency semver to v7.7.4 (#8247) by @renovate[bot] - deps: update github-actions (#8243) by @renovate[bot] - deps: update npm packages (#8245) by @renovate[bot] - deps: update oxc resolver to v11.17.1 (#8240) by @renovate[bot] - deps: update rust crate oxc_sourcemap to v6.0.2 (#8241) by @renovate[bot] - rust: handle ignored `RUSTSEC-2025-0141` cargo check error (#8235) by @hyf0 - deps: update dependency oxlint-tsgolint to v0.11.5 (#8233) by @renovate[bot] - deps: update dependency rolldown-plugin-dts to ^0.22.0 (#8232) by @renovate[bot] - deps: update crate-ci/typos action to v1.43.3 (#8225) by @renovate[bot] - deps: update dependency rolldown-plugin-dts to v0.21.9 (#8224) by @renovate[bot] - deps: update crate-ci/typos action to v1.43.2 (#8212) by @renovate[bot] - remove rolldown_plugin_vite_wasm_helper (#8207) by @shulaoda - build docs for production (#8206) by @sapphi-red Co-authored-by: shulaoda <165626830+shulaoda@users.noreply.github.com>

github-actions bot assigned sapphi-red Feb 9, 2026

hyf0 approved these changes Feb 9, 2026

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sapphi-red marked this pull request as ready for review February 9, 2026 13:29

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sapphi-red added the graphite: merge-when-ready label Feb 9, 2026

sapphi-red removed the graphite: merge-when-ready label Feb 10, 2026

graphite-app bot force-pushed the 02-09-feat_add_hidden_resolve_tsconfig_function_for_vite branch from fa0c67a to 4994992 Compare February 10, 2026 01:41

graphite-app bot merged commit 4994992 into main Feb 10, 2026
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graphite-app bot deleted the 02-09-feat_add_hidden_resolve_tsconfig_function_for_vite branch February 10, 2026 01:53

This was referenced Feb 11, 2026

release: v1.0.0-rc.4 #8271

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feat: add hidden `resolve_tsconfig` function for Vite#8257

feat: add hidden `resolve_tsconfig` function for Vite#8257
graphite-app[bot] merged 1 commit intomainfrom
02-09-feat_add_hidden_resolve_tsconfig_function_for_vite

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