refactor(fs_watcher): unify the way of constructing watcher#8571
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Pull request overview
Refactors filesystem watcher construction by centralizing watcher selection logic inside rolldown_fs_watcher, and updating consumers to use that factory so watcher setup is consistent across dev and watch APIs.
Changes:
- Added
rolldown_fs_watcher::create_fs_watcher()as the canonical factory for constructing non-noop watchers. - Extended
FsWatcherConfigwithuse_polling/use_debounceselection flags (and wired them throughrolldown_dev/rolldown_watcher). - Replaced duplicated watcher-selection branching in
rolldown_devandrolldown_watcherwith the new factory call.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| crates/rolldown_watcher/src/watcher.rs | Routes watcher creation through create_fs_watcher() and propagates polling selection into FsWatcherConfig. |
| crates/rolldown_fs_watcher/src/lib.rs | Introduces create_fs_watcher() factory encapsulating polling/debounce watcher selection. |
| crates/rolldown_fs_watcher/src/fs_watcher_config.rs | Adds use_polling/use_debounce fields to support centralized selection logic. |
| crates/rolldown_dev/src/dev_engine.rs | Switches watcher construction to create_fs_watcher() and passes the new config flags through. |
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shulaoda
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Mar 7, 2026
sapphi-red
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## [1.0.0-rc.8] - 2026-03-09 ### 🚀 Features - watch: enable full functional fs watcher in wasm (#8575) by @hyf0 - watch: expose debounce related options (#8572) by @hyf0 ### 🐛 Bug Fixes - detect new URL(…, import.meta.url) with no-sub template literal (#8565) by @char - devtools: trace dynamic imports in devtools (#8581) by @cal-gooo - watch: rebuild when a previously missing file is created (#8562) by @hyf0-agent - watch: filter out Access events to prevent infinite rebuild loop on Linux (#8557) by @hyf0-agent ### 🚜 Refactor - watch: remove auto watch for fail imports (#8585) by @hyf0 - fs_watcher: unify the way of constructing watcher (#8571) by @hyf0 - cli: migrate CLI to CAC (#8551) by @h-a-n-a - switch asset module support from hard-code to builtin plugin (#8546) by @hyf0 ### 📚 Documentation - fix subject-verb agreement in why-bundlers.md (#8591) by @brandonzylstra - maintenance: align release and canary workflow guide (#8538) by @minsoo-web - add `format` option to directives example config (#8590) by @shulaoda - fix: change twitter to x logo in team (#8552) by @mdong1909 - correct composable filter support explanation (#8550) by @sapphi-red ### ⚡ Performance - testing: share tokio runtime across fixture tests (#8567) by @Boshen ### 🧪 Testing - hmr: fix infinite loop in dev server test retry logic (#8576) by @hyf0-agent - cli: add more cli-e2e test cases (#8548) by @h-a-n-a ### ⚙️ Miscellaneous Tasks - docs: update in-depth/directives for `output.strict` option (#8535) by @minsoo-web - add PNPM_HOME Dev Drive mapping to Windows CI workflows (#8589) by @Boshen - deps: update github-actions (#8588) by @renovate[bot] - move Windows cargo target dir to Dev Drive (#8586) by @Boshen - optimize cache keys to fix race conditions and reduce usage (#8578) by @Boshen - remove WASI build & test pipeline (#8580) by @Boshen - remove unnecessary submodule checkouts (#8577) by @Boshen - use Dev Drive for Windows CI jobs (#8574) by @Boshen - skip redundant native binding build for browser and remove standalone job (#8573) by @Boshen - parallelize Node tests on ubuntu, single Node 24 on macOS/windows (#8570) by @Boshen - docs: bump @voidzero-dev/vitepress-theme to 4.8.0 (#8558) by @crusty-voidzero - dedupe type-check from dev server workflow (#8554) by @Boshen ### ❤️ New Contributors * @brandonzylstra made their first contribution in [#8591](#8591) * @char made their first contribution in [#8565](#8565) * @cal-gooo made their first contribution in [#8581](#8581) * @hyf0-agent made their first contribution in [#8562](#8562) * @h-a-n-a made their first contribution in [#8551](#8551) Co-authored-by: shulaoda <165626830+shulaoda@users.noreply.github.com>
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