aaac7fed
 liuqimichale
add
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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
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