initial commit

node_modules/yargs/lib/apply-extends.js

@@ -0,0 +1,41 @@
+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