Server : nginx/1.20.1 System : Linux ccpf-production-2021 5.4.0-148-generic #165-Ubuntu SMP Tue Apr 18 08:53:12 UTC 2023 x86_64 User : forge ( 1000) PHP Version : 7.4.21 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /lib/node_modules/gulp/node_modules/yargs/lib/

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var fs = require('fs')
var path = require('path')
var assign = require('./assign')
var YError = require('./yerror')

var previouslyVisitedConfigs = []

function checkForCircularExtends (path) {
  if (previouslyVisitedConfigs.indexOf(path) > -1) {
    throw new YError("Circular extended configurations: '" + path + "'.")
  }
}

function getPathToDefaultConfig (cwd, pathToExtend) {
  return path.resolve(cwd, pathToExtend)
}

function applyExtends (config, cwd, subKey) {
  var defaultConfig = {}

  if (config.hasOwnProperty('extends')) {
    var pathToDefault = getPathToDefaultConfig(cwd, config.extends)

    checkForCircularExtends(pathToDefault)

    previouslyVisitedConfigs.push(pathToDefault)
    delete config.extends

    defaultConfig = JSON.parse(fs.readFileSync(pathToDefault, 'utf8'))
    if (subKey) {
      defaultConfig = defaultConfig[subKey] || {}
    }
    defaultConfig = applyExtends(defaultConfig, path.dirname(pathToDefault), subKey)
  }

  previouslyVisitedConfigs = []

  return assign(defaultConfig, config)
}

module.exports = applyExtends