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Name	Size	Permission
apply-extends.js	1.44 KB	-rw-r--r--
argsert.js	2.3 KB	-rw-r--r--
command.js	13.54 KB	-rw-r--r--
completion.js	3.14 KB	-rw-r--r--
levenshtein.js	2.12 KB	-rw-r--r--
obj-filter.js	269 B	-rw-r--r--
usage.js	14.51 KB	-rw-r--r--
validation.js	10.77 KB	-rw-r--r--
yerror.js	254 B	-rw-r--r--

Code Editor : apply-extends.js

'use strict'
const fs = require('fs')
const path = require('path')
const YError = require('./yerror')

let 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) {
  let defaultConfig = {}

if (config.hasOwnProperty('extends')) {
    if (typeof config.extends !== 'string') return defaultConfig
    const isPath = /\.json$/.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

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))
  }

previouslyVisitedConfigs = []

return Object.assign({}, defaultConfig, config)
}

module.exports = applyExtends

${this.title}

Code Editor : apply-extends.js