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feat: replace [format] placeholder in chunk filename templates#6476

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hyf0 merged 7 commits intorolldown:mainfrom
elecmonkey:fix/format-placeholder
Oct 10, 2025
Merged

feat: replace [format] placeholder in chunk filename templates#6476
hyf0 merged 7 commits intorolldown:mainfrom
elecmonkey:fix/format-placeholder

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@elecmonkey
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Rolldown writes out the literal [format] to filenames if it is used in an output pattern. With rollup it is replaced with the format, like esm or cjs.

This PR aims to align Rolldown’s features with the Rollup documentation.

Fixes #6437

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@hyf0 hyf0 self-assigned this Oct 10, 2025
@elecmonkey elecmonkey force-pushed the fix/format-placeholder branch from 9a7efee to e150e54 Compare October 10, 2025 15:40
@elecmonkey elecmonkey requested a review from hyf0 October 10, 2025 15:47
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Thank you!

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@hyf0 hyf0 force-pushed the fix/format-placeholder branch from d4f79bc to 5498fe9 Compare October 10, 2025 18:34
@hyf0 hyf0 enabled auto-merge (squash) October 10, 2025 18:35
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@hyf0 hyf0 merged commit eab0bcb into rolldown:main Oct 10, 2025
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shulaoda pushed a commit that referenced this pull request Oct 13, 2025
## [1.0.0-beta.43] - 2025-10-13

### 🚀 Features

- add filterVitePlugins utility that uses to skip vite plugins using apply: "serve" (#6502) by @IWANABETHATGUY
- rolldown_plugin_vite_html: align partial can inline entry logic (#6500) by @shulaoda
- rolldown_plugin_vite_html: align get_imported_chunks logic (#6499) by @shulaoda
- rolldown_plugin_vite_html: align HtmlTagDescriptor (#6498) by @shulaoda
- rolldown_plugin_vite_html: align partial utility functions logic (#6497) by @shulaoda
- rolldown_html_vite_html: align partial inject chunk asset links logic (#6496) by @shulaoda
- rolldown_plugin_vite_html: align `processedHtml` logic (#6494) by @shulaoda
- add `nativeMagicString` options (#6469) by @IWANABETHATGUY
- rust: eagerly cleanup resources when calling `close` (#6483) by @hyf0
- rust: varify if bundler is closed for public API (#6481) by @hyf0
- replace [format] placeholder in chunk filename templates (#6476) by @elecmonkey
- implement synchronous JS callback invocation for paths function (#6474) by @IWANABETHATGUY
- rolldown_plugin_vite_html: align partial transform hook logic (#6471) by @shulaoda
- Support `output.paths` (#6470) by @IWANABETHATGUY
- rolldown_plugin_vite_html: align script urls handle logic (#6466) by @shulaoda
- add validation for `preserveEntrySignatures` with `includeDependenciesRecursively` option (#6468) by @hyf0
- rolldown_plugin_vite_html: align partial logic (#6465) by @shulaoda
- background sourcemap generation for Javascript transform hooks (#6293) by @IWANABETHATGUY
- rolldown_plugin_vite_html: handle style tag (#6464) by @shulaoda
- rolldown_plugin_vite_html: handle inline style attribute (#6463) by @shulaoda
- rolldown_plugin_vite_html: patially handle vite-ignore attribute (#6462) by @shulaoda
- dev/node: expose errors of `on_hmr_updatrs` to node (#6454) by @hyf0
- dev/node: expose errors of `on_output` to node (#6453) by @hyf0
- dev: expose hmr errors on `on_hmr_updatrs` callback (#6443) by @hyf0

### 🐛 Bug Fixes

- fallback sourcemap generation for `experimental.nativeMagicString: false` (#6488) by @IWANABETHATGUY
- take `resolve.modules` into account (#6484) by @Pickachu
- rolldown: increase tokio blocking threads size for watch mode (#6467) by @Brooooooklyn
- use len_utf16 in magic_string CharToByteMapper (#6461) by @IWANABETHATGUY
- pass `advancedChunks#includeDependenciesRecursively` to rust (#6448) by @hyf0
- dev: should compute hmr update correctly for multiple clients (#6442) by @hyf0
- allow specifying packageJsonPath in PluginContext.load (#6439) by @sapphi-red
- use transform.target as default for minify target when `minify: { compress: true }` (#6433) by @sapphi-red

### 🚜 Refactor

- extract background sourcemap handling into separate methods (#6501) by @IWANABETHATGUY
- rust: only expose methods of `Bundler` for public usage (#6480) by @hyf0
- dev/node: use napi object instead clss for `BindingClientHmrUpdate` (#6456) by @hyf0
- dev/node: improve `DevOnHmrUpdates` API (#6455) by @hyf0

### 📚 Documentation

- update team page and add acknowledgements page (#6495) by @hyf0
- restructure website and files (#6492) by @hyf0
- correct incorrect documentation about the config file (#6472) by @jsparkdev
- options: `experimental.strictExecutionOrder` (#6450) by @hyf0
- adding `why-plugin-hook-filter` in depth (#6446) by @IWANABETHATGUY

### ⚡ Performance

- rolldown: replace serde JSON string escape with simd impl (#6475) by @Brooooooklyn

### ⚙️ Miscellaneous Tasks

- docs: redirect removed path to new locations for compatibility (#6493) by @hyf0
- deps: lock file maintenance npm packages (#6490) by @renovate[bot]
- deps: update github-actions (major) (#6415) by @renovate[bot]
- deps: update github-actions (#6489) by @renovate[bot]
- rust: add comment for `DiagnosticOptions#stabilize_path` (#6447) by @hyf0
- rust: remove unused `BindingHmrOutput` (#6457) by @hyf0
- rolldown_plugin_vite_html: tweak `utils.rs` (#6460) by @shulaoda
- change node version to lts (#6435) by @iiio2
- rust/test: split hmr related structs into their own files (#6445) by @hyf0
- deps: update crate-ci/typos action to v1.38.1 (#6452) by @renovate[bot]
- rust/test: render hmr errors (#6444) by @hyf0
- examples: add `"type": "module"` in `package.json` (#6441) by @iiio2

### ❤️ New Contributors

* @Pickachu made their first contribution in [#6484](#6484)
* @elecmonkey made their first contribution in [#6476](#6476)
* @jsparkdev made their first contribution in [#6472](#6472)
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[Feature Request]: support "[format]" in filename patterns

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