You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
2.0 KiB
60 lines
2.0 KiB
2 years ago
|
import { YError } from '../yerror.js';
|
||
|
|
let previouslyVisitedConfigs = [];
|
||
|
|
let shim;
|
||
|
|
export function applyExtends(config, cwd, mergeExtends, _shim) {
|
||
|
|
shim = _shim;
|
||
|
|
let defaultConfig = {};
|
||
|
|
if (Object.prototype.hasOwnProperty.call(config, 'extends')) {
|
||
|
|
if (typeof config.extends !== 'string')
|
||
|
|
return defaultConfig;
|
||
|
|
const isPath = /\.json|\..*rc$/.test(config.extends);
|
||
|
|
let pathToDefault = null;
|
||
|
|
if (!isPath) {
|
||
|
|
try {
|
||
|
|
pathToDefault = require.resolve(config.extends);
|
||
|
|
}
|
||
|
|
catch (_err) {
|
||
|
|
return config;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
pathToDefault = getPathToDefaultConfig(cwd, config.extends);
|
||
|
|
}
|
||
|
|
checkForCircularExtends(pathToDefault);
|
||
|
|
previouslyVisitedConfigs.push(pathToDefault);
|
||
|
|
defaultConfig = isPath
|
||
|
|
? JSON.parse(shim.readFileSync(pathToDefault, 'utf8'))
|
||
|
|
: require(config.extends);
|
||
|
|
delete config.extends;
|
||
|
|
defaultConfig = applyExtends(defaultConfig, shim.path.dirname(pathToDefault), mergeExtends, shim);
|
||
|
|
}
|
||
|
|
previouslyVisitedConfigs = [];
|
||
|
|
return mergeExtends
|
||
|
|
? mergeDeep(defaultConfig, config)
|
||
|
|
: Object.assign({}, defaultConfig, config);
|
||
|
|
}
|
||
|
|
function checkForCircularExtends(cfgPath) {
|
||
|
|
if (previouslyVisitedConfigs.indexOf(cfgPath) > -1) {
|
||
|
|
throw new YError(`Circular extended configurations: '${cfgPath}'.`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
function getPathToDefaultConfig(cwd, pathToExtend) {
|
||
|
|
return shim.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;
|
||
|
|
}
|