TreeFS: Symlink-enabled, prefix-tree implementation of FileSystem
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This pull request was exported from Phabricator. Differential Revision: D42552999 |
robhogan
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Feb 14, 2023
| * The query matches against normalized paths which start with `./`, | ||
| * for example: `a/b.js` -> `./a/b.js` | ||
| */ | ||
| matchFilesWithContext( |
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FYI @EvanBacon - this is an O(subtree) implementation of matchFilesWithContext, so once TreeFS is the default (a bit of benchmarking + optimisation to do) we'll have addressed this and can probably promote require.context to stable 🚀
…acebook#926) Summary: Pull Request resolved: facebook#926 Currently, `HasteFS` is the only implementation of the `FileSystem` interface, used by Metro to check for file existence during resolution, and to retrieve metadata (file hashes, etc) during transformation. `HasteFS` is based on a simple, performant `Map` of real paths to metadata. This diff introduces `TreeFS`, which is based on an in-memory prefix tree representation, split on path separators, of all watched files. By using a prefix tree, we can lookup files whose paths segments are directory symlinks or files which are themselves links to other files. We use `TreeFS` in preference to `HasteFS` when `config.resolver.unstable_enableSymlinks` (default: `false`) is `true`. Reviewed By: motiz88 Differential Revision: D42552999 fbshipit-source-id: 2705f34436d549831b51e4773bce39094a6ec507
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This pull request was exported from Phabricator. Differential Revision: D42552999 |
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….0 (#264) [](https://renovatebot.com) This PR contains the following updates: | Package | Change | Age | Adoption | Passing | Confidence | |---|---|---|---|---|---| | [metro-react-native-babel-preset](https://togithub.com/facebook/metro) | [`^0.72.0` -> `^0.76.0`](https://renovatebot.com/diffs/npm/metro-react-native-babel-preset/0.72.3/0.76.0) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>facebook/metro</summary> ### [`v0.76.0`](https://togithub.com/facebook/metro/releases/tag/v0.76.0) [Compare Source](https://togithub.com/facebook/metro/compare/v0.75.1...v0.76.0) - **\[Breaking]**: Increase minimum Node version from 14 to 16. (facebook/metro@e5950ae by [@​huntie](https://togithub.com/huntie)) - **\[Breaking]**: Remove `isAssetFile` from custom resolver context, add `assetExts`. (facebook/metro@c6548f7 by [@​huntie](https://togithub.com/huntie)) - **\[Feature]**: Support [`require.resolveWeak()`](https://facebook.github.io/metro/docs/module-api#requireresolveweak). (facebook/metro@354d6e4 by [@​motiz88](https://togithub.com/motiz88)) - **\[Fix]**: Don't over-invalidate on symlink changes if resolution through symlinks is not enabled. (facebook/metro@2303c10 by [@​robhogan](https://togithub.com/robhogan)) - **\[Fix]**: Returning `false` from [`context.redirectModulePath`](https://facebook.github.io/metro/docs/resolution#redirectmodulepath-string--string--false) will resolve to empty module in all cases. (facebook/metro@0f1846a by [@​huntie](https://togithub.com/huntie)) - **\[Fix]**: Respect extensionless entries in `browser`, `react-native` etc when resolving subpath package specifiers. (facebook/metro@7e92227 by [@​huntie](https://togithub.com/huntie)) - **\[Fix]**: Remove undocumented Meta-only `__jsResource` and `__conditionallySplitJsResource` functions from module API. (facebook/metro@f1d905b and facebook/metro@69c8fc7 by [@​motiz88](https://togithub.com/motiz88)) > NOTE: Experimental features are not covered by semver and can change at any time. - **\[Experimental]**: Fixes and improvements for symlink support. (facebook/metro@0e2a70a, facebook/metro@3bef954, and facebook/metro@eeb211f by [@​robhogan](https://togithub.com/robhogan)) - **\[Experimental]**: Fix bug where `"exports"` field would be used on relative imports within a package. (facebook/metro@cd25c2b by [@​huntie](https://togithub.com/huntie)) ### [`v0.75.1`](https://togithub.com/facebook/metro/releases/tag/v0.75.1) [Compare Source](https://togithub.com/facebook/metro/compare/v0.75.0...v0.75.1) - **\[Feature]**: `metro-inspector-proxy`: Add a human-readable reference to each inspector entries/pages.([facebook/metro#921 by [@​byCedric](https://togithub.com/byCedric)) - **\[Feature]**: `metro-inspector-proxy`: Report errors in the console. (facebook/metro@da8b41b by [@​mattbfb](https://togithub.com/mattbfb)) - **\[Fix]**: Race condition where a very recently modified file might have missing metadata.(facebook/metro@baf28ab by [@​robhogan](https://togithub.com/robhogan)) - **\[Fix]**: Source maps may have invalid entries when using Terser minification. ([facebook/metro#928 by [@​robhogan](https://togithub.com/robhogan)) - **\[Fix]**: `metro-inspector-proxy`: Fetch source maps from Metro. (facebook/metro@6690b39 by [@​mattbfb](https://togithub.com/mattbfb)) - **\[Fix]**: Mitigate potential source map mismatches with concurrent transformations due to [terser#​1341](https://togithub.com/terser/terser/issues/1341). ([facebook/metro#929 by [@​robhogan](https://togithub.com/robhogan)) > NOTE: Experimental features are not covered by semver and can change at any time. - **\[Experimental]**: Add initial_build annotation to Resolving and Transforming Dependencies (facebook/metro@fc83b52 by [@​blakef](https://togithub.com/blakef)) - **\[Experimental]**: Implement support for Package Exports (enabled via `resolver.unstable_enablePackageExports`) (facebook/metro@4d7ab38, facebook/metro@38b96f8, facebook/metro@216d3e2, facebook/metro@6e6f36f by [@​huntie](https://togithub.com/huntie)) - **\[Experimental]**: Implement support for symlinks (enabled via `resolver.unstable_enableSymlinks`) ([facebook/metro#925, [facebook/metro#926, etc. by [@​robhogan](https://togithub.com/robhogan)) **Full Changelog:** facebook/metro@v0.75.0...v0.75.1 ### [`v0.75.0`](https://togithub.com/facebook/metro/releases/tag/v0.75.0) [Compare Source](https://togithub.com/facebook/metro/compare/v0.74.1...v0.75.0) - **\[Breaking]**: Formalise minimum Node JS requirement at 14.17.0 via `package.json#engines`. (facebook/metro@c3e453e) - **\[Breaking]**: Filter untyped context properties passed to custom resolvers. (facebook/metro@cb01ec0) - **\[Breaking]**: Change default `context.redirectModulePath` implementation to return absolute path in all cases. (facebook/metro@acbfe63) - **\[Feature]**: Add `mainFields`, `getPackage`, and `getPackageForModule` to custom resolver context. (facebook/metro@adfb593) **Full Changelog**: facebook/metro@v0.74.1...v0.75.0 ### [`v0.74.1`](https://togithub.com/facebook/metro/releases/tag/v0.74.1) [Compare Source](https://togithub.com/facebook/metro/compare/v0.74.0...v0.74.1) - **\[Feature]**: Add `@babel/plugin-proposal-numeric-separator` to `metro-react-native-babel-preset` ([facebook/metro#681 by [@​SConaway](https://togithub.com/SConaway)) **Full Changelog**: facebook/metro@v0.74.0...v0.74.1 ### [`v0.74.0`](https://togithub.com/facebook/metro/releases/tag/v0.74.0) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.8...v0.74.0) - **\[Breaking]** Remove [@​babel/plugin-transform-template-literals](https://togithub.com/babel/plugin-transform-template-literals) from metro-react-native-babel-preset (facebook/metro@322dea8) - **\[Breaking]** Remove `postProcessBundleSourcemap` from config (facebook/metro@339794e) - **\[Fix]** Don't log ENOENT errors to console for expected URL stack frames (facebook/metro@1031ae6) - **\[Fix]** Don't attempt to use the `find` crawler on Windows (facebook/metro@735aa9f) - **\[Performance]** Improve AST processing during transformation ([facebook/metro#854 by [@​EvanBacon](https://togithub.com/EvanBacon)) - **\[Performance]** Improve Fast Refresh responsiveness when watching a large number of files (facebook/metro@b942eca) **Full Changelog:** facebook/metro@v0.73.6...v0.74.0 ### [`v0.73.8`](https://togithub.com/facebook/metro/releases/tag/v0.73.8) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.7...v0.73.8) *This is a hotfix on the `0.73.x` branch.* - **\[Fix]**: Source maps may have invalid entries when using Terser minification. ([facebook/metro#928) - **\[Fix]**: Mitigate potential source map mismatches with concurrent transformations due to [terser#​1341](https://togithub.com/terser/terser/issues/1341). ([facebook/metro#929) **Full Changelog**: facebook/metro@v0.73.7...v0.73.8 ### [`v0.73.7`](https://togithub.com/facebook/metro/releases/tag/v0.73.7) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.6...v0.73.7) *This is a hotfix on the `0.73.x` branch.* - **\[Fix]** Don't attempt to use the `find` crawler on Windows (facebook/metro@3703019) ### [`v0.73.6`](https://togithub.com/facebook/metro/releases/tag/v0.73.6) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.5...v0.73.6) - **\[Fix]** Fix duplicate 'add' events, reduce dropped events on new subtrees in `NodeWatcher` (non-Watchman, non-macOS).(facebook/metro@51fb7e3) > NOTE: Experimental features are not covered by semver and can change at any time. - **\[Experimental]** `experimentalImportBundleSupport`: Move bundle path hints into serialised dependency map([facebook/metro#901) **Full Changelog:** facebook/metro@v0.73.5...v0.73.6 ### [`v0.73.5`](https://togithub.com/facebook/metro/releases/tag/v0.73.5) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.4...v0.73.5) - **\[Fix]**: Make all `getTransformOptions` result properties optional. (facebook/metro@a07c823) - **\[Fix]**: Bug that can lead to "unknown module" errors at runtime after an incremental build. (facebook/metro@b1be263) - **\[Fix]**: `metro-runtime`: Re-throw cached module errors without wrapping. (facebook/metro@032c4a1) - **\[Fix]** Bump `babel/types` dependency to `^7.20.0` for more consistent exposed AST Bump `babel/types` dependency to `^7.20.0` for more consistent exposed AST **Full Changelog**: facebook/metro@v0.73.4...v0.73.5 ### [`v0.73.4`](https://togithub.com/facebook/metro/releases/tag/v0.73.4) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.3...v0.73.4) - **\[Feature]:** Expose `watch` option in `RunServerOptions` ([facebook/metro#889 by [@​EvanBacon](https://togithub.com/EvanBacon)) - **\[Feature]:** `metro-runtime`: Emit additional context on WebSocket `'close'` events (facebook/metro@d54986c) > NOTE: Experimental features are not covered by semver and can change at any time. - **\[Experimental]**: `experimentalImportBundleSupport`: Retraverse parents of deleted async dependencies (facebook/metro@cb806d1) **Full Changelog:** facebook/metro@v0.73.3...v0.73.4 ### [`v0.73.3`](https://togithub.com/facebook/metro/releases/tag/v0.73.3) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.2...v0.73.3) - **\[Feature]**: Add configurable watcher health check that is off by default (facebook/metro@7adf468, facebook/metro@39f6e50) > NOTE: Experimental features are not covered by semver and can change at any time. - **\[Experimental]**: Move `experimentalImportBundleSupport` option from transformer to server (facebook/metro@3c0e1f7) **Full Changelog:** facebook/metro@v0.73.2...v0.73.3 ### [`v0.73.2`](https://togithub.com/facebook/metro/releases/tag/v0.73.2) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.1...v0.73.2) Maintenance release with purely internal changes. **Full Changelog:** facebook/metro@v0.73.1...v0.73.2 ### [`v0.73.1`](https://togithub.com/facebook/metro/releases/tag/v0.73.1) [Compare Source](https://togithub.com/facebook/metro/compare/v0.73.0...v0.73.1) - **\[Fix]**: Generate a unique name for each Watchman subscription. ([`3b0e78a`](https://togithub.com/facebook/metro/commit/3b0e78a76f4eea9f02e8b8464cf5b5e4549d6ac7)) > NOTE: Experimental features are not covered by semver and can change at any time. - **\[Experimental]\[Fix]**: Normalize file paths for `require.context` on Windows ([facebook/metro#876 by [@​byCedric](https://togithub.com/byCedric)) **Full Changelog:** facebook/metro@v0.73.0...v0.73.1 ### [`v0.73.0`](https://togithub.com/facebook/metro/releases/tag/v0.73.0) [Compare Source](https://togithub.com/facebook/metro/compare/v0.72.3...v0.73.0) - **\[Breaking]** Switch default minifier from `uglify-es` to `terser`. ([#​871](https://togithub.com/facebook/metro/issues/871)) - **\[Breaking]**: Increase minimum supported Node.js version to ^14.17.0. ([#​872](https://togithub.com/facebook/metro/issues/872)) - **\[Breaking]**: Drop support for old (pre-CalVer) Watchman versions. ([`422055a`](https://togithub.com/facebook/metro/commit/422055a5ccaca41edb1864ca07d4f810b3e03791)) - **\[Feature]**: Support `fsevents` watcher on Apple Silicon. ([#​875](https://togithub.com/facebook/metro/issues/875)) - **\[Feature]**: Support loading source URLs in inspector-proxy. ([`db19b06`](https://togithub.com/facebook/metro/commit/db19b06bdd6d2fbbe109e4f3be4b3af3489c1f1c)) - **\[Fix]**: Log warning on unexpected error during `metro-file-map` cache read. ([`7028b7f`](https://togithub.com/facebook/metro/commit/7028b7f51074f9ceef22258a8643d0f90de2388b)) - **\[Fix]**: Remove exponentiation operator transform from `metro-react-native-babel-preset`. ([`c2365bb`](https://togithub.com/facebook/metro/commit/c2365bb1d72a3773b31c05feab13a96afac484df)) - **\[Fix]**: Don’t check `watchman --version` if `useWatchman` is false. ([`76c9307`](https://togithub.com/facebook/metro/commit/76c9307ed61efa7794b30b4e585cc5941ed73e16)) **Full Changelog:** facebook/metro@v0.72.3...v0.73.0 </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). 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Summary:
Currently,
HasteFSis the only implementation of theFileSysteminterface, used by Metro to check for file existence during resolution, and to retrieve metadata (file hashes, etc) during transformation.HasteFSis based on a simple, performantMapof real paths to metadata.This diff introduces
TreeFS, which is based on an in-memory prefix tree representation, split on path separators, of all watched files.By using a prefix tree, we can lookup files whose paths segments are directory symlinks or files which are themselves links to other files.
We use
TreeFSin preference toHasteFSwhenconfig.resolver.unstable_enableSymlinks(default:false) istrue.Reviewed By: motiz88
Differential Revision: D42552999