Files
react-native/scripts/build/config.js
T
Alex Hunt e1998806b7 Migrate cli-plugin-metro into repo (#38795)
Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/38795

## Context

RFC: Decoupling Flipper from React Native core: https://github.com/react-native-community/discussions-and-proposals/pull/641

## Changes

Inits new package `react-native/community-cli-plugin`. This migrates [`react-native-community/cli-plugin-metro`](https://github.com/react-native-community/cli/tree/main/packages/cli-plugin-metro) into the React Native repo, to enable faster iteration by the React Native core team. Specifically:

- This package contains several `metro` dependencies, which when removed from CLI will no longer require us to ship new CLI releases to get Metro patches and features to users.
- This package contains the `start`, `bundle`, and `ram-bundle` commands (central to the React Native development experience), for which we have incoming debugging-related changes.
- This package now **only** exports commands to be attached via a RN CLI plugin. With this move, we're aiming to **internalise** the default implementations of these dev commands within React Native — other RN CLI plugins can continue to override these, but must do so wholesale. (See also the recent fix for this: https://github.com/react-native-community/cli/pull/1999.)

In V15:
- (Microsoft feedback) Re-export  `unstable_buildBundleWithConfig`, marking as unstable. This gives us a time buffer to consider how we repackage this functionality in future.

The package source has been converted from TypeScript to Flow, with a number of new `flow-typed/` defs added to meet type coverage requirements.

## To dos

- For now, we aren't removing the existing [`react-native-community/cli-plugin-metro`](https://github.com/react-native-community/cli/tree/main/packages/cli-plugin-metro) source — until later PRs consolidate this move by changing dependencies in the `react-native` package.
- **Exported API is reduced!**: I'm working with szymonrybczak to decouple references from RN CLI packages https://github.com/react-native-community/cli/pull/2021.

Changelog: [Internal]

Reviewed By: motiz88

Differential Revision: D46801501

fbshipit-source-id: 7f6b72941a69f487fb437768cdba125a9aa3418d
2023-08-10 11:34:36 -07:00

73 lines
1.5 KiB
JavaScript

/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
* @format
* @oncall react_native
*/
/*::
import type {BabelCoreOptions} from '@babel/core';
export type BuildOptions = $ReadOnly<{
target: 'node',
}>;
export type BuildConfig = $ReadOnly<{
packages: $ReadOnly<{[packageName: string]: BuildOptions}>,
}>;
*/
const TARGET_NODE_VERSION = '18';
const buildConfig /*: BuildConfig */ = {
// The packages to include for build and their build options
packages: {
'community-cli-plugin': {target: 'node'},
'dev-middleware': {target: 'node'},
},
};
function getBabelConfig(
packageName /*: $Keys<BuildConfig['packages']> */,
) /*: BabelCoreOptions */ {
const {target} = buildConfig.packages[packageName];
switch (target) {
case 'node':
return {
presets: [
'@babel/preset-flow',
[
'@babel/preset-env',
{
targets: {
node: TARGET_NODE_VERSION,
},
},
],
],
plugins: [
[
'transform-define',
{
'process.env.BUILD_EXCLUDE_BABEL_REGISTER': true,
},
],
[
'minify-dead-code-elimination',
{keepFnName: true, keepFnArgs: true, keepClassName: true},
],
],
};
}
}
module.exports = {
buildConfig,
getBabelConfig,
};