| "use strict"; |
| Object.defineProperty(exports, "__esModule", { value: true }); |
| exports.applyExtends = void 0; |
| const fs = require("fs"); |
| const path = require("path"); |
| const yerror_1 = require("./yerror"); |
| let previouslyVisitedConfigs = []; |
| function checkForCircularExtends(cfgPath) { |
| if (previouslyVisitedConfigs.indexOf(cfgPath) > -1) { |
| throw new yerror_1.YError(`Circular extended configurations: '${cfgPath}'.`); |
| } |
| } |
| function getPathToDefaultConfig(cwd, pathToExtend) { |
| return path.resolve(cwd, pathToExtend); |
| } |
| function mergeDeep(config1, config2) { |
| const target = {}; |
| function isObject(obj) { |
| return obj && typeof obj === 'object' && !Array.isArray(obj); |
| } |
| Object.assign(target, config1); |
| for (const key of Object.keys(config2)) { |
| if (isObject(config2[key]) && isObject(target[key])) { |
| target[key] = mergeDeep(config1[key], config2[key]); |
| } |
| else { |
| target[key] = config2[key]; |
| } |
| } |
| return target; |
| } |
| function applyExtends(config, cwd, mergeExtends = false) { |
| let defaultConfig = {}; |
| if (Object.prototype.hasOwnProperty.call(config, 'extends')) { |
| if (typeof config.extends !== 'string') |
| return defaultConfig; |
| const isPath = /\.json|\..*rc$/.test(config.extends); |
| let pathToDefault = null; |
| if (!isPath) { |
| try { |
| pathToDefault = require.resolve(config.extends); |
| } |
| catch (err) { |
| // most likely this simply isn't a module. |
| } |
| } |
| else { |
| pathToDefault = getPathToDefaultConfig(cwd, config.extends); |
| } |
| // maybe the module uses key for some other reason, |
| // err on side of caution. |
| if (!pathToDefault && !isPath) |
| return config; |
| if (!pathToDefault) |
| throw new yerror_1.YError(`Unable to find extended config '${config.extends}' in '${cwd}'.`); |
| checkForCircularExtends(pathToDefault); |
| previouslyVisitedConfigs.push(pathToDefault); |
| defaultConfig = isPath ? JSON.parse(fs.readFileSync(pathToDefault, 'utf8')) : require(config.extends); |
| delete config.extends; |
| defaultConfig = applyExtends(defaultConfig, path.dirname(pathToDefault), mergeExtends); |
| } |
| previouslyVisitedConfigs = []; |
| return mergeExtends ? mergeDeep(defaultConfig, config) : Object.assign({}, defaultConfig, config); |
| } |
| exports.applyExtends = applyExtends; |
