/
Config.js
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/
Config.js
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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @flow
*/
'use strict';
const blacklist = require('../../packager/blacklist');
const fs = require('fs');
const invariant = require('fbjs/lib/invariant');
const path = require('path');
const {providesModuleNodeModules} = require('../../packager/defaults');
const RN_CLI_CONFIG = 'rn-cli.config.js';
import type {GetTransformOptions, PostMinifyProcess, PostProcessModules} from '../../packager/src/Bundler';
import type {HasteImpl} from '../../packager/src/node-haste/Module';
import type {TransformVariants} from '../../packager/src/ModuleGraph/types.flow';
/**
* Configuration file of the CLI.
*/
export type ConfigT = {
extraNodeModules: {[id: string]: string},
/**
* Specify any additional asset file extensions to be used by the packager.
* For example, if you want to include a .ttf file, you would return ['ttf']
* from here and use `require('./fonts/example.ttf')` inside your app.
*/
getAssetExts: () => Array<string>,
/**
* Returns a regular expression for modules that should be ignored by the
* packager on a given platform.
*/
getBlacklistRE(): RegExp,
/**
* Specify any additional platforms to be used by the packager.
* For example, if you want to add a "custom" platform, and use modules
* ending in .custom.js, you would return ['custom'] here.
*/
getPlatforms: () => Array<string>,
getProjectRoots(): Array<string>,
/**
* Specify any additional node modules that should be processed for
* providesModule declarations.
*/
getProvidesModuleNodeModules?: () => Array<string>,
/**
* Specify any additional source file extensions to be used by the packager.
* For example, if you want to include a .ts file, you would return ['ts']
* from here and use `require('./module/example')` to require the file with
* path 'module/example.ts' inside your app.
*/
getSourceExts: () => Array<string>,
/**
* Returns the path to a custom transformer. This can also be overridden
* with the --transformer commandline argument.
*/
getTransformModulePath: () => string,
getTransformOptions: GetTransformOptions,
/**
* An optional function that can modify the code and source map of bundle
* after the minifaction took place.
*/
postMinifyProcess: PostMinifyProcess,
/**
* An optional function that can modify the module array before the bundle is
* finalized.
*/
postProcessModules: PostProcessModules,
/**
* A module that exports:
* - a `getHasteName(filePath)` method that returns `hasteName` for module at
* `filePath`, or undefined if `filePath` is not a haste module.
*/
hasteImpl?: HasteImpl,
transformVariants: () => TransformVariants,
};
const defaultConfig: ConfigT = {
extraNodeModules: Object.create(null),
getAssetExts: () => [],
getBlacklistRE: () => blacklist(),
getPlatforms: () => [],
getProjectRoots: () => [process.cwd()],
getProvidesModuleNodeModules: () => providesModuleNodeModules.slice(),
getSourceExts: () => [],
getTransformModulePath: () => path.resolve(__dirname, '../../packager/transformer'),
getTransformOptions: async () => ({}),
postMinifyProcess: x => x,
postProcessModules: modules => modules,
transformVariants: () => ({default: {}}),
};
/**
* Module capable of getting the configuration out of a given file.
*
* The function will return all the default configuration, as specified by the
* `defaultConfig` param overriden by those found on `rn-cli.config.js` files, if any. If no
* default config is provided and no configuration can be found in the directory
* hierarchy, an error will be thrown.
*/
const Config = {
find(startDir: string): ConfigT {
const configPath = findConfigPath(startDir);
invariant(
configPath,
`Can't find "${RN_CLI_CONFIG}" file in any parent folder of "${startDir}"`,
);
return this.loadFile(configPath, startDir);
},
findOptional(startDir: string): ConfigT {
const configPath = findConfigPath(startDir);
return configPath
? this.loadFile(configPath, startDir)
: {...defaultConfig};
},
loadFile(pathToConfig: string): ConfigT {
//$FlowFixMe: necessary dynamic require
const config: {} = require(pathToConfig);
return {...defaultConfig, ...config};
},
};
function findConfigPath(cwd: string): ?string {
const parentDir = findParentDirectory(cwd, RN_CLI_CONFIG);
return parentDir ? path.join(parentDir, RN_CLI_CONFIG) : null;
}
// Finds the most near ancestor starting at `currentFullPath` that has
// a file named `filename`
function findParentDirectory(currentFullPath, filename) {
const root = path.parse(currentFullPath).root;
const testDir = (parts) => {
if (parts.length === 0) {
return null;
}
const fullPath = path.join(root, parts.join(path.sep));
var exists = fs.existsSync(path.join(fullPath, filename));
return exists ? fullPath : testDir(parts.slice(0, -1));
};
return testDir(currentFullPath.substring(root.length).split(path.sep));
}
module.exports = Config;