@rnx-kit/config

Query for a package's configuration.

Configuration influences how the CLI behaves. If you're not using the CLI, and instead using a specific tool programmatically, you can use this library to read configuration data and use it as tool input.

Schema

Package configuration is under the top-level rnx-kit entry in package.hson. It is of type KitConfig.

KitConfig

Configuration information for an rnx-kit package. This is retrieved from 'rnx-kit' in package.json.

Name	Type	Description
kitType	"app", "library", undefined	Library or App package. Used by the dependency manager when projecting capabilities into dependencies, devDependencies, and peerDependencies. Library package dependencies are private, in dev and peer. App package dependencies are public.
reactNativeVersion	string, undefined	React Native version (or range) which this package supports.
reactNativeDevVersion	string, undefined	React Native version to use during development of this package. If not specified, the minimum reactNativeVersion is used.
bundle	BundleConfig, BundleConfig[], undefined	Specifies how the package is bundled.
server	ServerConfig, undefined	Specifies how the package's bundle server is configured.
capabilities	Capability[], undefined	List of capabilities that this package needs. A capability is a well-known name (string).
customProfiles	string, undefined	Path to a file containing custom profiles.

BundleConfig inherits BundleParameters

Defines how a package is bundled. Includes shared bundling parameters with platform-specific overrides.

Name	Type	Description
id	string, undefined	Unique identifier for this bundle definition. Only used as a reference within the build system.
targets	AllPlatforms[], undefined	The platform(s) for which this package may be bundled.
platforms	{[K in AllPlatforms]: BundleDefinition}, undefined	Platform-specific overrides for bundling parameters. Any parameter not listed in an override gets its value from the shared bundle definition, or falls back to defaults.

AllPlatforms

Union of: "ios", "android", "windows", "win32", "macos"

BundleParameters

Parameters controlling how a bundle is constructed.

Name	Type	Description
entryFile	string, undefined	Path to the .js file which is the entry-point for building the bundle. Either absolute, or relative to the package.
bundleOutput	string, undefined	Path to the output bundle file. Either absolute or relative to the package.
bundleEncoding	string, undefined	Encoding scheme to use when writing the bundle file. Currently limited to UTF-8, UTF-16 (little endian), and 7-bit ASCII.
sourcemapOutput	string, undefined	Path to use when creating the bundle source map file. Either absolute, or relative to the package.
sourcemapSourcesRoot	string, undefined	Path to the package's source files. Used to make source-map paths relative and therefore portable.
sourcemapUseAbsolutePath	boolean, undefined	Controls whether or not SourceMapURL is reported as a full path or just a file name.
assetsDest	string, undefined	Path where all bundle assets (strings, images, fonts, sounds, ...) are written. Either absolute, or relative to the package.
indexedBundleFormat	boolean, undefined	Force the "Indexed RAM" bundle file format, even when targeting Android. Only applies to the rnx-ram-bundle command.
plugins	(string | [string, any])[]	List of plugins to apply. If unset, it falls back to ["@rnx-kit/metro-plugin-cyclic-dependencies-detector", "@rnx-kit/metro-plugin-duplicates-checker", "@rnx-kit/metro-plugin-typescript"].
treeShake	boolean, undefined	Choose whether to enable tree shaking.

CyclicDetectorOptions

Name	Type	Default	Description
includeNodeModules	boolean, undefined	false	When scanning for circular dependencies, include all external packages from node_modules.
linesOfContext	number, undefined	1	When a cycle is detected, this controls the size of the module backtrace that is printed with the error message.
throwOnError	boolean, undefined	true	Whether or not to throw an exception when a cycle is detected.

DuplicateDetectorOptions

Name	Type	Default	Description
ignoredModules	string[], undefined		List of modules to ignore when scanning for duplicate dependencies.
bannedModules	string[], undefined		List of modules that always cause a failure, regardless of whether or not they are duplicated.
throwOnError	boolean, undefined	true	Whether or not to throw an exception when a duplicate or banned module is detected.

TypeScriptValidationOptions

Name	Type	Default	Description
throwOnError	boolean, undefined	true	Controls whether an error is thrown when type-validation fails.

ServerConfig

Name	Type	Description
projectRoot	string, undefined	Path to the root of your react-native application. The bundle server uses this root path to resolve all web requests. The root path should contain your Babel config, otherwise Metro won't be able to find it. Either absolute, or relative to the package.
assetPlugins	string[], undefined	Additional asset plugins to be used by the Metro Babel transformer. Comma-separated list containing plugin modules and/or absolute paths to plugin packages.
sourceExts	string[], undefined	Additional source-file extensions to include when generating bundles. Comma-separated list, excluding the leading dot.
plugins	(string | [string, any])[]	List of plugins to apply. If unset, it falls back to ["@rnx-kit/metro-plugin-cyclic-dependencies-detector", "@rnx-kit/metro-plugin-duplicates-checker", "@rnx-kit/metro-plugin-typescript"].

API

getKitConfig({module, cwd})

Query for a package's rnx-kit configuration.

Parameter	Type	Description
module	string, undefined	Read package configuration from the named module. When given, this takes precedence over cwd.
cwd	string, undefined	Read package configuration from the given directory. Ignored when module is given.
[Return]	KitConfig, null	Package configuration, or null if nothing was found.

getBundleConfig(config, id)

Get a bundle configuration from the rnx-kit configuration.

If an id is given, search for the matching bundle definition. Otherwise, use the first bundle definition.

Parameter	Type	Description
config	KitConfig	The package's rnx-kit configuration
id	string, undefined	Optional identity of the target bundle configuration
[Return]	BundleDefinition	Bundle configuration, or undefined if nothing was found

getPlatformBundleConfig(bundle, platform)

Resolves the platform selector for a bundle configuration.

Parameter	Type	Description
bundle	BundleConfig	Bundle config to resolve (includes the optional platform selectors)
platform	AllPlatforms	Target platform
[Return]	BundleDefinition	Bundle config containing platform-specific overrides

getKitCapabilities(config)

Get capability information from the package configuration.

Parameter	Type	Description
config	KitConfig	Package configuration.
[Return]	KitCapabilities	Capability information.

KitCapabilities

Name	Type	Default	Description
kitType	"app", "library", undefined	"library"	Library or App package. Used by the dependency manager when projecting capabilities into dependencies, devDependencies, and peerDependencies. Library package dependencies are private, in dev and peer. App package dependencies are public.
reactNativeVersion	string		React Native version (or range) which this package supports.
reactNativeDevVersion	string	Min version in reactNativeVersion	React Native version to use during development of this package. If not specified, the minimum reactNativeVersion is used.
capabilities	Capability[]	[]	List of capabilities that this package needs. A capability is a well-known name (string).
customProfiles	string, undefined		Path to a file containing custom profiles.