feat: mark __export runtime helper as pure#5926
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| //#region node_modules/demo-pkg/index-module.js | ||
| var index_module_exports = {}; | ||
| __export(index_module_exports, { foo: () => foo }); | ||
| /* @__PURE__ */ __export(index_module_exports, { foo: () => foo }); |
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I don't think this is correct. This means this expression can be removed whenever because the return value is not used.
We have to output something like:
var index_module_exports = /* @__PURE__ */ __export({}, { foo: () => foo });to mark the call expression as pure.
I haven't checked but I assume this is the reason why Vite's tests failed after this PR is merged.
https://github.com/rolldown/rolldown/actions/runs/17257477246/job/48972158671
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This reverts commit 9dcb0e5.
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## [1.0.0-beta.35] - 2025-09-05 ### 🚀 Features - rolldown_plugin_vite_css_post: attch vite metadata to chunks (#6011) by @shulaoda - rolldown_plugin_vite_css_post: emit a single CSS asset for non–code-split builds (#6005) by @shulaoda - rolldown_plugin_vite_css_post: align empty CSS chunk removal logic (#6004) by @shulaoda - use frequent characters first for internal export names (#5524) by @AliceLanniste - rolldown_plugin_vite_css_post: align partial `generateBundle` logic (#5987) by @shulaoda - rolldown_plugin_vite_css_post: align `augmentChunkHash` logic (#5986) by @shulaoda - rolldown_watcher: introduce `WatcherConfig` for configurable watcher parameters (#5991) by @hyf0 - dev: support `import.meta.invalidate` and migrate tests (#5979) by @hyf0 - dev: adapt `TestDevServer` with `DevEngine` (#5976) by @hyf0 - propertyWriteSideEffects (#5977) by @IWANABETHATGUY - rolldown_plugin_vite_css_post: complete `transform` logic (#5985) by @shulaoda - dev: generate hmr updates for file changes (#5961) by @hyf0 - rolldown_plugin_vite_css_post: complete `finalize_css` (#5974) by @shulaoda - dev: manage cache by `DevEngine` (#5960) by @hyf0 - rolldown_plugin_vite_css_post: align `hoist_at_rules` (#5967) by @shulaoda - rolldown_plugin_vte_css_post: complete `resolve_asset_urls_in_css` (#5958) by @shulaoda - rolldown_plugin_utils: support common `to_output_file_path` (#5956) by @shulaoda - dev: default to not eager rebuild (#5949) by @hyf0 - treeshake.propertyReadSideEffects (#5945) by @IWANABETHATGUY - improve error message for `this.resolve` and `this.load` (#5596) by @sapphi-red - dev: accept `onHmrUpdates` callback (#5942) by @hyf0 - rolldown_plugin_vite_css_post: align partial `resolve_asset_urls_in_css` (#5929) by @shulaoda - mark `__export` runtime helper as pure (#5926) by @IWANABETHATGUY - rolldown_plugin_vite_css_post: extract `finalize_css_chunk` (#5916) by @shulaoda - implement inlineConst.pass (#5912) by @IWANABETHATGUY - rolldown_plugin_vite_css_post: align partial legacy logic (#5915) by @shulaoda - add inlineConst.pass options (#5911) by @IWANABETHATGUY - rolldown_plugin_vite_css_post: align partial css code split logic (#5906) by @shulaoda - inlineConst: safe (#5899) by @IWANABETHATGUY ### 🐛 Bug Fixes - rolldown: don't cleanup for browser build (#6024) by @sxzz - propertyWriteSideEffects for toplevel staticClassBlock (#5989) by @IWANABETHATGUY - handle `obj().prop` when `propertyReadSideEffects: false` (#5988) by @IWANABETHATGUY - handle objectSpread when `treeshake.propertyReadSideEffects` is enabled (#5981) by @IWANABETHATGUY - __toESM function breaking ES module imports (#5966) by @IWANABETHATGUY - merge `typescript.onlyRemoveTypeImports` correctly (#5962) by @shulaoda - should not generate `init_mod` when record is a ExportAllDeclaration and importee is a inner concatenate module (#5952) by @IWANABETHATGUY - use symbol existance to detect if a plugin is BuiltinPlugin (#5940) by @IWANABETHATGUY - handle errors thrown in `onLog` and `onwarn` options (#5931) by @sapphi-red - `replace_plugin` does not work as expected with .ts config (#5920) by @IWANABETHATGUY - `replace_plugin` support primitive values replacement (#5921) by @IWANABETHATGUY - node 20 test version (#5918) by @IWANABETHATGUY - trigger trace subscriber cleanup on Node.js side (#5913) by @sapphi-red - add friendly deprecation warning for `resolve.tsconfigFilename` (#5908) by @shulaoda - inlineConst inlines a var (#5903) by @IWANABETHATGUY - types: omit `sourcemap` property from `MinifyOptions` correctly (#5892) by @sapphi-red ### 🚜 Refactor - hmr: process changed files in one update (#6013) by @hyf0 - rolldown_plugin_vite_css_post: improve (#6006) by @shulaoda - migrate remaining crates from #[allow] to #[expect] attributes (#6002) by @hyf0 - crates/rolldown_common: migrate from #[allow] to #[expect] attributes (#6001) by @hyf0 - crates/rolldown_binding: migrate from #[allow] to #[expect] attributes (#6000) by @hyf0 - crates/rolldown: migrate from #[allow] to #[expect] attributes (#5999) by @hyf0 - extract all options usage in `impl_visit.rs` into `FlatOptionsFlag` (#5992) by @IWANABETHATGUY - rolldown_watcher: distinguish debounced and non-debounced watchers (#5990) by @hyf0 - dev: only use poll-based watch if required (#5984) by @hyf0 - dev: use dynamic dispatch watcher (#5982) by @hyf0 - improve plugin logic relate to `to_output_file_path` (#5959) by @shulaoda - make reference_needed_symbols lock free (#5964) by @IWANABETHATGUY - tweak module loader code (#5950) by @shulaoda - use less memory to store frequently accessed options field (#5948) by @IWANABETHATGUY - make `ecma_related` in `NormalModuleTaskResult` non-optional (#5947) by @shulaoda - dev: replace `BuildStatus` with `BuildStateMachine` (#5927) by @hyf0 - rename `inlineConst: 'safe'` to `inlineConst: 'smart'` (#5909) by @IWANABETHATGUY ### 📚 Documentation - add redirect for old plugin development page link (#5963) by @TheAlexLichter ### ⚡ Performance - rolldown: use allocator pool when minifying chunks (#5978) by @Boshen - merge two `PreProcessor` and `EnsureSpanUniqueness` (#5968) by @IWANABETHATGUY ### 🧪 Testing - cjs module lexer for named import external with cjs format (#5970) by @IWANABETHATGUY - hmr: import.meta.hot?.accept case (#5935) by @sapphi-red - hmr: accept outside circular case (#5938) by @sapphi-red - hmr: no accept outside circular dependencies case (#5937) by @sapphi-red - hmr: self accept within circular dependencies case (#5936) by @sapphi-red ### ⚙️ Miscellaneous Tasks - deps: update crate-ci/typos action to v1.36.2 (#6015) by @renovate[bot] - deps: update dependency rolldown-plugin-dts to ^0.16.0 (#6023) by @renovate[bot] - ci: re-enable WASM tests in CI workflows (#6007) by @hyf0 - deps: update crate-ci/typos action to v1.35.8 (#6012) by @renovate[bot] - clippy: enable allow_attributes lint and migrate to #[expect] (#6008) by @hyf0 - remove unmaintained AGENTS.md file (#6009) by @hyf0 - deps: update github-actions (#5993) by @renovate[bot] - fix `knip` warnings and remove redundant `@rolldown/testing` (#5973) by @shulaoda - deps: update dependency rolldown-plugin-dts to v0.15.10 (#5925) by @renovate[bot] - deps: update rust crate tracing-subscriber to v0.3.20 [security] (#5972) by @renovate[bot] - fix wasi build failed (#5969) by @shulaoda - deps: update crate-ci/typos action to v1.35.7 (#5965) by @renovate[bot] - remove redundant code (#5943) by @shulaoda - npm trusted publisher (#5953) by @Brooooooklyn - deps: update crate-ci/typos action to v1.35.6 (#5957) by @renovate[bot] - Revert "feat: mark `__export` runtime helper as pure (#5926)" (#5928) by @IWANABETHATGUY - deps: update dependency rolldown-plugin-dts to v0.15.10 (#5900) by @renovate[bot] - validator: improve the diagnostic message (#5919) by @shulaoda - add more tracing instrumentation (#5914) by @sapphi-red - add proper error message when passing unexpected minify options in rust test (#5905) by @IWANABETHATGUY - deps: update dependency tsdown to v0.14.2 (#5901) by @renovate[bot] - add automatic issue closing (#5895) by @shulaoda Co-authored-by: shulaoda <[email protected]>
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related to #5923 Now use the suggestion from @sapphi-red #5926 (comment) to construct module_namespace. note: It is safe to merge `module_namespace` declaration and the `__export` statement, since we always append `__export` statement before `__reexport` statements https://github.com/rolldown/rolldown/pull/5939/files#diff-869ccc2e55fee0609d8452d49a68b9df851a71c9f34bdd0324cbd5dfdfe8d1bfL458-L459
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related to #5923 Now use the suggestion from @sapphi-red #5926 (comment) to construct module_namespace. note: It is safe to merge `module_namespace` declaration and the `__export` statement, since we always append `__export` statement before `__reexport` statements https://github.com/rolldown/rolldown/pull/5939/files#diff-869ccc2e55fee0609d8452d49a68b9df851a71c9f34bdd0324cbd5dfdfe8d1bfL458-L459 Something still needs to be done before the merge: - ~`rolldown-dts-plugin` supports our new `__exports` codegen pattern~ - ~`rolldown-vite` upgrade to version has the fixing patch.~
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…dule-lexer` (#7640) Closes #7634 Rename `__export` to `__exportAll` to ensure compatibility with `cjs-module-lexer` versions older than 2.1.1 (which covers most Node.js versions). `cjs-module-lexer` has special handling for `__export` (a pattern used by TypeScript). Since it uses pattern matching to detect exports, it fails to parse `__export` when there is only one argument (e.g., `__export({ ... })`), expecting the form `__export(exports, { ... })` instead. By using a different name, we avoid triggering this faulty heuristic entirely. Background: why we change the `__export` runtime helper 1. #6114 2. #5926
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__export just like__esm it only take effects when the export object are used, so mark it aspure could reduce the output size in some scenario see #5923 as an example