cli

Command-line interface for working with packages in your repo.

Bundle a Package

Bundle a package using Metro. The bundling process uses optional configuration parameters and command-line overrides.

The command react-native rnx-bundle is meant to be a drop-in replacement for react-native bundle. If rnx-bundle ever becomes widely accepted, we will work on upstreaming it to @react-native-community/cli, along with supporting libraries for package configuration and Metro plugins.

Example Commands

yarn react-native rnx-bundle

yarn react-native rnx-bundle       \
    --entry-file src/index.ts      \
    --bundle-output main.jsbundle  \
    --platform ios                 \
    --dev false                    \
    --minify true

Example Configuration (Optional)

{
  "rnx-kit": {
    "bundle": {
      "entryFile": "entry.js",
      "assetsDest": "dist",
      "plugins": [
        "@rnx-kit/metro-plugin-cyclic-dependencies-detector",
        [
          "@rnx-kit/metro-plugin-duplicates-checker",
          { "ignoredModules": ["react-is"] }
        ],
        "@rnx-kit/metro-plugin-typescript"
      ],
      "targets": ["ios", "android", "windows", "macos"],
      "platforms": {
        "android": {
          "assetsDest": "dist/res"
        },
        "macos": {
          "plugins": [
            "@rnx-kit/metro-plugin-cyclic-dependencies-detector",
            [
              "@rnx-kit/metro-plugin-duplicates-checker",
              { "ignoredModules": ["react-is"] }
            ]
          ]
        }
      }
    }
  }
}

Bundle Defaults

When certain parameters aren't specified in configuration or on the command-line, they are explicitly set to default values.

Parameter	Default Value
entryFile	"index.js"
bundleOutput	"index.<platform>.bundle" (Windows, Android) or "index.<platform>.jsbundle" (iOS, macOS)
hermes	false
treeShake	false
plugins	["@rnx-kit/metro-plugin-cyclic-dependencies-detector", "@rnx-kit/metro-plugin-duplicates-checker", "@rnx-kit/metro-plugin-typescript"]

Other parameters have implicit defaults, buried deep in Metro or its dependencies.

Command-Line Overrides

Override	Description
--id [id]	Target bundle definition. This is only needed when the rnx-kit configuration has multiple bundle definitions.
--entry-file [file]	Path to the root JavaScript or TypeScript file, either absolute or relative to the package.
--platform [ios | android | windows | win32 | macos]	Target platform. When not given, all platforms in the rnx-kit configuration are bundled.
--dev [boolean]	If false, warnings are disabled and the bundle is minified (default: true).
--minify [boolean]	Controls whether or not the bundle is minified. Disabling minification is useful for test builds.
--bundle-output [path]	Path to the output bundle file, either absolute or relative to the package.
--bundle-encoding [utf8 | utf16le | ascii]	Character encoding to use when writing the bundle file.
--max-workers [number]	Specifies the maximum number of parallel worker threads to use for transforming files. This defaults to the number of cores available on your machine.
--sourcemap-output [string]	Path where the bundle source map is written, either absolute or relative to the package.
--sourcemap-sources-root [string]	Path to use when relativizing file entries in the bundle source map.
--assets-dest [path]	Path where bundle assets like images are written, either absolute or relative to the package. If not given, assets are ignored.
--tree-shake [boolean]	Enable tree shaking to remove unused code and reduce the bundle size.
--reset-cache	Reset the Metro cache.
--config [string]	Path to the Metro configuration file.
-h, --help	Show usage information.

Start a Bundle Server

Start a bundle server for a package using Metro. The bundle server uses optional configuration parameters and command-line overrides.

The command react-native rnx-start is meant to be a drop-in replacement for react-native start. If rnx-start ever becomes widely accepted, we will work on upstreaming it to @react-native-community/cli, along with supporting libraries for package configuration and Metro plugins.

Example Commands

yarn react-native rnx-start

yarn react-native rnx-start --host localhost --port 8812

Example Configuration

{
  "rnx-kit": {
    "server": {
      "projectRoot": "src",
      "plugins": [
        "@rnx-kit/metro-plugin-cyclic-dependencies-detector",
        [
          "@rnx-kit/metro-plugin-duplicates-checker",
          {
            "ignoredModules": ["react-is"],
            "throwOnError": false
          }
        ],
        "@rnx-kit/metro-plugin-typescript"
      ]
    }
  }
}

Server Defaults

If the server configuration is not defined, it is implicitly created at runtime from the bundle configuration (or its defaults).

Command-Line Overrides

Override	Description
--port [number]	Host port to use when listening for incoming server requests.
--host [string]	Host name or address to bind when listening for incoming server requests. When not given, requests from all addresses are accepted.
--projectRoot [path]	Path to the root of your react-native project. The bundle server uses this root path to resolve all web requests.
--watchFolders [paths]	Additional folders which will be added to the file-watch list. Comma-separated. By default, Metro watches all project files.
--assetPlugins [list]	Additional asset plugins to be used by the Metro Babel transformer. Comma-separated list containing plugin module names or absolute paths to plugin packages.
--sourceExts [list]	Additional source-file extensions to include when generating bundles. Comma-separated list, excluding the leading dot.
--max-workers [number]	Specifies the maximum number of parallel worker threads to use for transforming files. This defaults to the number of cores available on your machine.
--reset-cache	Reset the Metro cache.
--custom-log-reporter-path [string]	Path to a JavaScript file which exports a Metro TerminalReporter function. This replaces the default reporter, which writes all messages to the Metro console.
--https	Use a secure (https) web server. When not specified, an insecure (http) web server is used.
--key [path]	Path to a custom SSL private key file to use for secure (https) communication.
--cert [path]	Path to a custom SSL certificate file to use for secure (https) communication.
--config [string]	Path to the Metro configuration file.
--no-interactive	Disables interactive mode.
--id	Specify which bundle configuration to use if server configuration is missing.

Manage Dependencies

Manage dependencies within a repository and across many repositories.

$ yarn react-native rnx-align-deps [options] [/path/to/package.json]

Refer to @rnx-kit/align-deps for details.

Generate a Third-Party Notice for a Package

Generate a 3rd-party notice, which is an aggregation of all the LICENSE files from your package's dependencies.

NOTE: A 3rd-party notice is a legal document. You are solely responsble for its content, even if you use this command to assist you in generating it. You should consult with an attorney to ensure your notice meets all legal requirements.

$ yarn react-native rnx-write-third-party-notices [options]

Option	Description
--root-path [path]	The root of the repo. This is the starting point for finding each module in the source map dependency graph.
--source-map-file [file]	The source map file associated with the package's entry file. This source map eventually leads to all package dependencies and their licenses.
--json	Format the 3rd-party notice file as JSON instead of text.
--output-file [file]	The path to use when writing the 3rd-party notice file.
--ignore-scopes [string]	Comma-separated list of npm scopes to ignore when traversing the source map dependency graph.
--ignore-modules [string]	Comma-separated list of modules to ignore when traversing the source map dependency graph.
--preamble-text [string]	A string to prepend to the start of the 3rd-party notice.
--additional-text [path]	A string to append to the end of the 3rd-party notice.

Clean a React Native Project

Deprecated: This command was upstreamed to @react-native-community/cli. As of v8.0, you can use react-native clean instead.

Cleans your project by removing React Native related caches and modules.

$ yarn react-native rnx-clean [options]

Option	Description
--include [string]	Comma-separated flag of caches to clear e.g npm,yarn . When not specified , only non-platform specific caches are cleared. [android,cocoapods,npm,metro,watchman,yarn]
--project-root [path]	Root path to your React Native project. When not specified, defaults to current working directory