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Alex Hunt
0d66c524cf
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/49353 This change adds an opt-in to restore JavaScript log streaming via the Metro dev server, [removed from React Native core in 0.77](https://reactnative.dev/blog/2025/01/21/version-0.77#removal-of-consolelog-streaming-in-metro). Users can opt into this legacy behaviour by adding the `--client-logs` flag to `npx react-native-community/cli start`. - The default experience remains without streamed JS logs. - The existing "JavaScript logs have moved! ..." notice is printed in all cases, and we do not advertise the new flag for new users. - Under non-Community CLI dev servers (i.e. Expo), log streaming is restored implicitly. We will clean up this functionality again when we eventually remove JS log streaming over `HMRClient`, tasked in T214991636. **Implementation notes** - Logs are always sent over `HMRClient` (previous status quo), even with log streaming off in the dev server. This is a necessary evil to be able to flag this functionality in a user-accessible place, and to move fast for 0.78. - Necessarily, emitting `fusebox_console_notice` moves to the dev server itself, on first device (Fusebox) connection. Changelog: [General][Added] - Add opt in for legacy Metro log streaming via `--client-logs` flag Reviewed By: robhogan Differential Revision: D69469039 fbshipit-source-id: be99d02a3b1c977a59bf7d2726f0e6cf2e60b28a
3.8 KiB
3.8 KiB
@react-native/community-cli-plugin
This is an internal dependency of React Native. Please don't depend on it directly.
CLI entry points supporting core React Native development features.
Formerly @react-native-community/cli-plugin-metro.
Commands
start
Start the React Native development server.
Usage
npx @react-native-community/cli start [options]
Options
| Option | Description |
|---|---|
--port <number> |
Set the server port. |
--host <string> |
Set the server host. |
--projectRoot <path> |
Set the path to the project root. |
--watchFolders <list> |
Specify additional folders to be added to the watch list. |
--assetPlugins <list> |
Specify additional asset plugins. |
--sourceExts <list> |
Specify additional source extensions to bundle. |
--max-workers <number> |
Set the maximum number of workers the worker-pool will spawn for transforming files. Defaults to the number of the cores available on your machine. |
--transformer <string> |
Specify a custom transformer. |
--reset-cache |
Remove cached files. |
--custom-log-reporter-path <string> |
Specify a module path exporting a replacement for TerminalReporter. |
--https |
Enable HTTPS connections. |
--key <path> |
Specify path to a custom SSL key. |
--cert <path> |
Specify path to a custom SSL cert. |
--config <string> |
Path to the CLI configuration file. |
--no-interactive |
Disable interactive mode. |
--client-logs |
[Deprecated] Enable plain text JavaScript log streaming for all connected apps. |
bundle
Build the bundle for the provided JavaScript entry file.
Usage
npx @react-native-community/cli bundle --entry-file <path> [options]
Options
| Option | Description |
|---|---|
--entry-file <path> |
Set the path to the root JavaScript entry file. |
--platform <string> |
Set the target platform (either "android" or "ios"). Defaults to "ios". |
--transformer <string> |
Specify a custom transformer. |
--dev [boolean] |
If false, warnings are disabled and the bundle is minified. Defaults to true. |
--minify [boolean] |
Allows overriding whether bundle is minified. Defaults to false if --dev is set. Disabling minification can be useful for speeding up production builds for testing purposes. |
--bundle-output <string> |
Specify the path to store the resulting bundle. |
--bundle-encoding <string> |
Specify the encoding for writing the bundle (https://nodejs.org/api/buffer.html#buffer_buffer). |
--resolver-option <string...> |
Custom resolver options of the form key=value. URL-encoded. May be specified multiple times. |
--sourcemap-output <string> |
Specify the path to store the source map file for the resulting bundle. |
--sourcemap-sources-root <string> |
Set the root path for source map entries. |
--sourcemap-use-absolute-path |
Report SourceMapURL using its full path. |
--max-workers <number> |
Set the maximum number of workers the worker-pool will spawn for transforming files. Defaults to the number of the cores available on your machine. |
--assets-dest <string> |
Specify the directory path for storing assets referenced in the bundle. |
--reset-cache |
Remove cached files. |
--read-global-cache |
Attempt to fetch transformed JS code from the global cache, if configured. Defaults to false. |
--config <string> |
Path to the CLI configuration file. |
Contributing
Changes to this package can be made locally and tested against the rn-tester app, per the Contributing guide. During development, this package is automatically run from source with no build step.