rnx-kit/packages/config
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src
test
CHANGELOG.md
README.md
eslint.config.js
package.json
schema.json
tsconfig.json

README.md

@rnx-kit/config

Build npm version

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.json. 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 Record<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.