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D N 97bea4625d Change default transform profile to 'hermes-stable' #2 (#57911 )

Summary:
Issue: https://github.com/react/react-native/issues/57174
Initially, this PR was created to fix an issue above: https://github.com/react/react-native/pull/57208

 ---

But after re-testing it on the latest React Native `0.87.x`.
I found out that cli  set `unstable_transformProfile` value to `default`  (cli -> metro -> babel -> rn/babel-preset)

```tsx
function getTransformProfile(caller) {
  return caller?.unstable_transformProfile ?? 'hermes-stable';
                 ^^^ has a 'default' value (from CLI)
}
```

 ---

So, `isHermesProfile` is always `false` here:

https://github.com/react/react-native/blob/22cfb5caec78cb21b4a66b0ab82b03cc5f99a4dd/packages/react-native-babel-preset/src/configs/main.js#L63

and unnecessary babel plugins has applied

## Changelog:

[GENERAL] [CHANGED] - Change default transform profile to 'hermes-stable'

Pull Request resolved: https://github.com/react/react-native/pull/57911

Test Plan:
```java
npx react-native-community/cli init --pm yarn RN87
cd RN87
open node_modules/react-native/babel-preset/src/configs/main.js
// add Logs to print (isHermesProfile, transformProfile) vars

// Run build
./android/gradlew -p android assembleRelease
// Check logs (have to be `isHermesProfile: false, transformProfile: 'default')

// Apply fix
open node_modules/react-native/community-cli-plugin/dist/commands/bundle/index.js
// Find a `--unstable-transform-profile` option
// And change `default: "default",` => `default: "hermes-stable",`

 // Run build again
```

Reviewed By: christophpurrer

Differential Revision: D119189290

Pulled By: cortinico

fbshipit-source-id: e21ce35044d474b778f1fa8efe777ca0d9e37c7a

2026-09-09 03:44:00 -07:00

src

Change default transform profile to 'hermes-stable' #2 (#57911 )

2026-09-09 03:44:00 -07:00

.gitignore

Migrate cli-plugin-metro into repo (#38795 )

2023-08-10 11:34:36 -07:00

package.json

Remove commander dependency from main package (#57645 )

2026-07-23 17:07:02 -07:00

README.md

Move codegen and spm command wrappers into community-cli-plugin (#57652 )

2026-07-25 10:32:46 -07:00

README.md

@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.

`codegen`

Run the React Native codegen, generating native boilerplate from JS spec files.

Usage

npx @react-native-community/cli codegen [options]

Options

Option	Description
`--path <path>`	Path to the React Native project root. Defaults to the current working directory.
`--platform <string>`	Target platform. Supported values: `"android"`, `"ios"`, `"all"`. Defaults to `"all"`.
`--outputPath <path>`	Path where generated artifacts will be output to.
`--source <string>`	Whether the script is invoked from an `app` or a `library`. Defaults to `"app"`.

`spm [action]`

Set up or maintain Swift Package Manager support for the iOS/macOS app. Actions: add, update, deinit, scaffold. With no action: add (or update if SPM is already set up).

Usage

npx @react-native-community/cli spm [action] [options]

Options

Option	Description
`--version <string>`	React Native version (e.g. `0.80.0`). Defaults to the version in `node_modules/react-native/package.json`.
`--yes`	Skip the dirty-pbxproj confirmation prompt.
`--xcodeproj <path>`	[add] Path to the `.xcodeproj` to inject SPM packages into (disambiguates when several exist).
`--productName <string>`	[add] App target to inject into (disambiguates when several exist).
`--deintegrate`	[add] Run `pod deintegrate` and strip React Native from the Podfile before injecting (CocoaPods → SwiftPM migration).
`--artifacts <path>`	[advanced] Local artifact root containing complete `debug/` and `release/` slots.
`--download <string>`	[advanced] Artifact download policy: `auto` (default), `skip`, or `force`.
`--skipCodegen`	[advanced] Skip the react-native codegen step.

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.