fix: tree shake unused dynamic entry when inlineDynamicImports is enabled
#7129
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crates/rolldown/tests/rolldown/function/inline_dynamic_imports/cjs/artifacts.snap
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Pull Request Overview
This PR fixes tree-shaking of unused dynamic imports when inlineDynamicImports is enabled (issue #6935). The fix changes the approach: instead of excluding dynamic imports from entries upfront when inlineDynamicImports is enabled, all dynamic imports are now added as entries and then filtered during tree-shaking based on actual usage.
Key changes:
- Dynamic imports are now always added as entry points in the module loader, regardless of the
inlineDynamicImportssetting - Dynamic imports are excluded from the dependency graph traversal in the link stage
- During tree-shaking, dynamic entries are filtered out when
inlineDynamicImportsis enabled, allowing unused dynamic imports to be properly tree-shaken
Reviewed Changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.
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| File | Description |
|---|---|
| crates/rolldown/src/module_loader/module_loader.rs | Removed conditional logic that prevented dynamic imports from being added as entries when inlineDynamicImports was enabled |
| crates/rolldown/src/stages/link_stage/mod.rs | Updated to exclude both DynamicImport and Require imports from dependency graph traversal |
| crates/rolldown/src/stages/link_stage/tree_shaking/include_statements.rs | Added logic to filter out dynamic entries when inlineDynamicImports is enabled after tree-shaking analysis |
| crates/rolldown/tests/rolldown/function/inline_dynamic_imports/issue-6935/* | New test case demonstrating that unused dynamic imports are properly tree-shaken |
| crates/rolldown/tests/rolldown/function/inline_dynamic_imports/{cjs,esm,iife}/artifacts.snap | Updated snapshots showing empty/unused dynamic imports now correctly tree-shaken to empty frozen objects |
| crates/rolldown/tests/snapshots/integration_rolldown__filename_with_hash.snap | Updated content hashes reflecting the tree-shaking improvements |
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## [1.0.0-beta.52] - 2025-11-26 💥 Breaking Change - Change `output.generatedCode.profilerNames` default to `false` 🔧 Vite-Style TypeScript Configuration - Rolldown now supports Vite-style automatic tsconfig resolution. Use `tsconfig: true` to enable auto-discovery mode where each module finds its nearest `tsconfig.json`. See more details [here](https://rolldown.rs/options/tsconfig) ⚙️ Upgraded to oxc v0.99.0 - Add `TSGlobalDeclaration` type - More details: https://github.com/oxc-project/oxc/releases/tag/crates_v0.99.0 ### 💥 BREAKING CHANGES - change `output.generatedCode.profilerNames` default to false (#7139) by @Copilot ### 🚀 Features - support vite-style tsconfig resolution (#6873) by @shulaoda - rolldown: oxc v0.99.0 (#7165) by @camc314 - browser: export `plugins` (#7210) by @sxzz - rolldown_plugin_vite_css_post: add `inline` parameter to `cssMinify` callback (#7191) by @shulaoda - rolldown_plugin_vite_build_import_analysis: implement `render_chunk` to replace `__VITE_IS_MODERN__` flag (#7178) by @shulaoda - rolldown_plugin_utils: optimize SVG data URL encoding (#7156) by @shulaoda - dev: replace `DevEngine::hasLatestBuildOutput` with `DevEngine::getBundleState` (#7145) by @sapphi-red - rolldown_plugin_vite_asset_import_meta_url: support `@vite-ignore` comment (#7141) by @shulaoda - rolldown_plugin_vite_asset_import_meta_url: implement static URL processing (#7140) by @shulaoda - rolldown_plugin_vite_asset_import_meta_url: align `asset_resolver` logic (#7137) by @shulaoda - rolldown_plugin_vite_asset_import_meta_url: align `try_fs_resolve` logic (#7136) by @shulaoda - rolldown_plugin_vite_asset_import_meta_url: validate relative paths (#7120) by @shulaoda - export `viteAssetImportMetaUrlPlugin` and add dynamic URL tests (#7119) by @shulaoda ### 🐛 Bug Fixes - watch overwrite rename event on linux (#7201) by @sapphi-red - preserve name for parenthesized anonymous default exports and arrow functions with keepNames (#7159) by @Copilot - rolldown_plugin_vite_html: add missing async attribute for inlined entry scripts (#7202) by @shulaoda - respect target setting in DCE to prevent modern syntax generation (#7128) by @Copilot - rolldown_plugin_vite_html: add semicolon to import statement in CSS removal (#7200) by @shulaoda - rolldown_plugin_vite_html: use correct CSS asset filename in HTML injection (#7199) by @shulaoda - rolldown_plugin_vite_css_post: handle scoped package names in lib CSS filename (#7198) by @shulaoda - rolldown_plugin_vite_html: use patched `html5gum` with correct span tracking (#7193) by @shulaoda - rolldown_plugin_vite_html: handle HTML strings in script tags correctly (#7192) by @shulaoda - handle JSON import namespace property access correctly (#7190) by @IWANABETHATGUY - only include runtime helpers from included modules (#7183) by @IWANABETHATGUY - rolldown_plugin_vite_html: normalize paths to use forward slashes in `original_file_name` (#7175) by @shulaoda - rolldown_plugin_vite_css_post: use `filename` instead of `reference_id` for imported assets (#7174) by @shulaoda - rolldown_plugin_vite_css_post: correct regex escaping in pure CSS chunk pruning (#7173) by @shulaoda - rolldown_plugin_vite_html: use correct dependency path for modulepreload links (#7172) by @shulaoda - update cur_stmt_index when processing top level statements (#7157) by @IWANABETHATGUY - rolldown_plugin_utils: strip leading character from public asset URL (#7170) by @shulaoda - rolldown_plugin_vite_html: use correct `public_base` for `html_result_map` key (#7169) by @shulaoda - rolldown_plugin_utils: correct runtime handling and escape single quotes in asset paths (#7168) by @shulaoda - rolldown_plugin_utils: prevent data race in `file_to_url` cache (#7166) by @shulaoda - rolldown_plugin_vite_asset_import_meta_url: correct glob pattern and query string handling in dynamic URLs (#7162) by @shulaoda - rolldown_plugin_vite_css_post: use correct start position in magic string updates (#7158) by @shulaoda - data race in `FileEmitter::emit_file` causing duplicate asset emissions (#7164) by @shulaoda - dev: watch files even if the build failed (#7149) by @sapphi-red - rolldown_plugin_utils: always use base64 encoding for data URLs (#7148) by @shulaoda - preserve "default" name for anonymous default exports with keepNames (#7151) by @Copilot - correctly handle cjs json module as entry point (#7147) by @IWANABETHATGUY - rolldown_plugin_utils: correct `reference_id` parsing in `render_asset_url_in_js` (#7143) by @shulaoda - rolldown_plugin_vite_asset_import_meta_url: exclude quotes from URL span (#7142) by @shulaoda - rolldown_plugin_vite_asset_import_meta_url: use template literal for glob result indexing (#7134) by @shulaoda - tree shake unused dynamic entry when `inlineDynamicImports` is enabled (#7129) by @IWANABETHATGUY - correct return value of `parse` / `parseSync` functions (#7127) by @sapphi-red ### 🚜 Refactor - rolldown_plugin_vite_transform: use `oxc_resolver` for tsconfig discovery (#7220) by @shulaoda - rolldown_plugin_vite_resolve: use `resolve_file` for tsconfig discovery (#7216) by @shulaoda - rolldown_plugin_utils: remove redundant `ViteMetadata::get_or_insert_default()` (#7189) by @shulaoda - rolldown_plugin_utils: simplify `ViteMetadata::get()` to always return a value (#7188) by @shulaoda - rolldown_utils: add `guess_mime_skip_utf8_check` for binary assets (#7161) by @shulaoda - rolldown_plugin_utils: extract asset URL parsing into `AssetUrlIter` (#7144) by @shulaoda - store pattern name in FilenameTemplate (#7132) by @IWANABETHATGUY ### 📚 Documentation - tsconfig: document auto-discovery mode and improve structure (#7228) by @shulaoda - add plugin hook filter compatibility and fallback guide (#7138) by @Copilot - update top level navigation (#7092) by @mdong1909 ### 🧪 Testing - add tsconfig include/exclude/files matching test cases (#6899) by @shulaoda - vite-tests: run `playwright install` in case playwright binary is missing (#7226) by @sapphi-red - watch: close watcher when an error occured in the test cases (#7225) by @sapphi-red - watch: reject `waitBuildFinished` if `ERROR` event occurs (#7224) by @sapphi-red ### ⚙️ Miscellaneous Tasks - example: revert accidental changes to basic-typescript (#7227) by @shulaoda - deps: update oxc apps (#7212) by @renovate[bot] - deps: update rust crates (#7204) by @renovate[bot] - deps: update `oxc_resolver_napi` to 11.14.0 (#7217) by @shulaoda - deps: update oxc_resolver (#6909) by @shulaoda - deps: update dependency glob to v13 (#7208) by @renovate[bot] - deps: update actions/checkout action to v6 (#7207) by @renovate[bot] - deps: update npm packages (#7206) by @renovate[bot] - deps: update github-actions (#7205) by @renovate[bot] - add missing status code comment (#7185) by @iiio2 - deps: update dependency oxlint-tsgolint to v0.8.1 (#7197) by @renovate[bot] - rust: add more tracing log for hmr + dev logic (#7179) by @hyf0 - deps: update dependency oxlint-tsgolint to v0.8.0 (#7167) by @renovate[bot] - deps: update dependency oxlint-tsgolint to v0.7.3 (#7133) by @renovate[bot] - merge similar inlineDynamicImports test case (#7131) by @IWANABETHATGUY - deps: update `rolldown-plugin-dts` to 0.18.0 (#7125) by @shulaoda Co-authored-by: shulaoda <[email protected]>
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closed #6935