refactor: remove warnings field from GenerateContext#8293
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shulaoda
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warnings field from GenerateContext
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Pull request overview
Removes the warnings accumulator from GenerateContext and shifts warning propagation to be returned explicitly by each generator via GenerateOutput, simplifying context construction and making warning flow more explicit in the generate stage.
Changes:
- Removed
warnings: Vec<BuildDiagnostic>fromGenerateContextand addedDefaultforGenerateOutput. - Updated generate-stage call sites to stop initializing
warnings: vec![]inGenerateContext. - Updated generators (ECMA/CSS/asset) to return warnings directly through
GenerateOutput.
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Show a summary per file
| File | Description |
|---|---|
| crates/rolldown/src/types/generator.rs | Removes warnings from GenerateContext; adds GenerateOutput: Default to support empty outputs. |
| crates/rolldown/src/stages/generate_stage/render_chunk_to_assets.rs | Stops populating GenerateContext.warnings and instead aggregates GenerateOutput.warnings from generators. |
| crates/rolldown/src/stages/generate_stage/mod.rs | Updates GenerateContext construction in export-mode computation to match the new struct shape. |
| crates/rolldown/src/ecmascript/ecma_generator.rs | Returns local warnings directly in GenerateOutput instead of mutating ctx.warnings. |
| crates/rolldown/src/css/css_generator.rs | Uses GenerateOutput::default() for empty CSS output; returns warnings explicitly (empty). |
| crates/rolldown/src/asset/asset_generator.rs | Returns warnings explicitly (empty) in GenerateOutput. |
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Benchmarks Rust |
hyf0
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Feb 12, 2026
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The `warnings` field was always initialized as an empty `Vec` at every call site and served no purpose other than acting as a temporary intermediary. Remove it and have each generator return warnings directly in `GenerateOutput` instead.
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## [1.0.0-rc.5] - 2026-02-18
💡 Smarter `entriesAware` Manual Code Splitting
New `entriesAware` and `entriesAwareMergeThreshold` options for `manualCodeSplitting.groups[]` enable
entry-reachability-based chunk splitting with automatic small chunk merging.
- `entriesAware: true` splits matched modules by entry reachability — modules reached by the same set of entries are grouped together, providing the most precise loading behavior with less over-fetching
- Chunks now get more readable names reflecting their entry associations (e.g. `vendor-entry-a-entry-b.js`) instead of opaque hashes
- `entriesAwareMergeThreshold` sets a byte-size threshold to merge tiny subgroups into the closest sibling with the fewest extra entries, reducing micro-chunk fragmentation while preserving precision
- Recommended to use together with `maxSize`: merge tiny chunks first to reduce request overhead, then cap large chunks to control payload size
```js
manualCodeSplitting: {
groups: [{
name: 'vendor',
test: /node_modules/,
entriesAware: true,
entriesAwareMergeThreshold: 28000, // bytes
}]
}
```
### 🚀 Features
- add `Visitor` to `rolldown/utils` (#8373) by @sapphi-red
- module-info: add `inputFormat` property to `ModuleInfo` (#8329) by @shulaoda
- default `treeshake.invalid_import_side_effects` to `false` (#8357) by @sapphi-red
- rolldown_utils: add `IndexBitSet` (#8343) by @sapphi-red
- rolldown_utils: add more methods and trait impls to BitSet (#8342) by @sapphi-red
- rolldown_plugin_vite_build_import_analysis: add support for `await import().then((m) => m.prop)` (#8328) by @sapphi-red
- rolldown_plugin_vite_reporter: support custom logger for build infos (#7652) by @shulaoda
- rust/mcs: support `entriesAwareMergeThreshold` (#8312) by @hyf0
- mcs: `maxSize` will split the oversized chunk with taking file relevance into account (#8277) by @hyf0
- rolldown_plugin_vite_import_glob: support template literal in glob import patterns (#8298) by @shulaoda
- rolldown_plugin_chunk_import_map: output importmap without spaces (#8297) by @sapphi-red
- add INEFFECTIVE_DYNAMIC_IMPORT warning in core (#8284) by @shulaoda
- mcs: generate more readable name for `entriesAware` chunks (#8275) by @hyf0
- mcs: support `entriesAware` (#8274) by @hyf0
### 🐛 Bug Fixes
- improve circular dependency detection in chunk optimizer (#8371) by @IWANABETHATGUY
- align `minify.compress: true` and `minify.mangle: true` with `minify: true` (#8367) by @sapphi-red
- rolldown_plugin_esm_external_require: apply conversion to UMD and IIFE outputs (#8359) by @sapphi-red
- cjs: bailout treeshaking on cjs modules that have multiple re-exports (#8348) by @hyf0
- handle member expression and this expression in JSX element name rewriting (#8323) by @IWANABETHATGUY
- pad `encode_hash_with_base` output to fixed length to prevent slice panics (#8320) by @shulaoda
- `xxhash_with_base` skips hashing when input is exactly 16 bytes (#8319) by @shulaoda
- complete `ImportKind::try_from` with missing variants and correct `url-import` to `url-token` (#8310) by @shulaoda
- mark Node.js builtin modules as side-effect-free when resolved via `external` config (#8304) by @IWANABETHATGUY
- mcs: `maxSize` should split chunks correctly based on sizes (#8289) by @hyf0
### 🚜 Refactor
- introduce `RawMangleOptions` and `RawCompressOptions` (#8366) by @sapphi-red
- mcs: refactor `apply_manual_code_splitting` into `ManualSplitter` (#8346) by @hyf0
- rolldown_plugin_vite_reporter: simplify hook registration and remove redundant state (#8322) by @shulaoda
- use set to store user defined entry modules (#8315) by @IWANABETHATGUY
- rust/mcs: collect groups into map at first for having clean and performant operations (#8313) by @hyf0
- mcs: introduce newtype `ModuleGroupOrigin` and `ModuleGroupId` (#8311) by @hyf0
- remove unnecessary `FinalizerMutableState` struct (#8303) by @shulaoda
- move module finalization into `finalize_modules` (#8302) by @shulaoda
- extract `apply_transfer_parts_mutation` into its own module (#8301) by @shulaoda
- move ESM format check into `determine_export_mode` (#8294) by @shulaoda
- remove `warnings` field from `GenerateContext` (#8293) by @shulaoda
- extract util function remove clippy supression (#8290) by @IWANABETHATGUY
- move `is_in_node_modules` to `PathExt` trait in `rolldown_std_utils` (#8286) by @shulaoda
- rolldown_plugin_vite_reporter: remove unnecessary ineffective dynamic import detection logic (#8285) by @shulaoda
- dev: inject hmr runtime to `\0rolldown/runtime.js` (#8234) by @hyf0
- improve naming in chunk_optimizer (#8287) by @IWANABETHATGUY
- simplify PostChunkOptimizationOperation from bitflags to enum (#8283) by @IWANABETHATGUY
- optimize BitSet.index_of_one to return iterator instead of Vec (#8282) by @IWANABETHATGUY
### 📚 Documentation
- change default value in `format` JSDoc from `'esm'` to `'es'` (#8372) by @shulaoda
- in-depth: remove `invalidImportSideEffects` option mention from lazy barrel optimization doc (#8355) by @sapphi-red
- mcs: clarify `minSize` constraints (#8279) by @ShroXd
### ⚡ Performance
- use IndexVec for chunk TLA detection (#8341) by @sapphi-red
- only invoke single resolve call for the same specifier and import kind (#8332) by @sapphi-red
- rolldown_plugin_vite_reporter: skip gzip computation when `report_compressed_size` is disabled (#8321) by @shulaoda
### 🧪 Testing
- use `vi.waitFor` and `expect.poll` instead of custom `waitUtil` function (#8369) by @sapphi-red
- rolldown_plugin_esm_external_require_plugin: add tests (#8358) by @sapphi-red
- add watch file tests (#8330) by @sapphi-red
- rolldown_plugin_vite_build_import_analysis: add test for dynamic import treeshaking (#8327) by @sapphi-red
### ⚙️ Miscellaneous Tasks
- prepare-release: skip workflow on forked repositories (#8368) by @shulaoda
- format more files (#8360) by @sapphi-red
- deps: update oxc to v0.114.0 (#8347) by @camc314
- deps: update test262 submodule for tests (#8354) by @sapphi-red
- deps: update crate-ci/typos action to v1.43.5 (#8350) by @renovate[bot]
- deps: update oxc apps (#8351) by @renovate[bot]
- rolldown_plugin_vite_reporter: remove unnecessary README.md (#8334) by @shulaoda
- deps: update npm packages (#8338) by @renovate[bot]
- deps: update rust crates (#8339) by @renovate[bot]
- deps: update dependency oxlint-tsgolint to v0.13.0 (#8337) by @renovate[bot]
- deps: update github-actions (#8336) by @renovate[bot]
- deps: update napi to v3.8.3 (#8331) by @renovate[bot]
- deps: update dependency oxlint-tsgolint to v0.12.2 (#8325) by @renovate[bot]
- remove unnecessary transform.decorator (#8314) by @IWANABETHATGUY
- deps: update dependency rust to v1.93.1 (#8305) by @renovate[bot]
- deps: update dependency oxlint-tsgolint to v0.12.1 (#8300) by @renovate[bot]
- deps: update oxc apps (#8296) by @renovate[bot]
- docs: don't skip for build runs without cache (#8281) by @sapphi-red
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The
warningsfield was always initialized as an emptyVecat every call site and served no purpose other than acting as a temporary intermediary. Remove it and have each generator return warnings directly inGenerateOutputinstead.