{
  "$schema": "http://json-schema.org/schema#",
  "type": "object",
  "properties": {
    "sources": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^((?:(?:(https?|file))://)(?:(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\\.?)+(?:[a-zA-Z]{2,6}\\.?|[a-zA-Z0-9-]{2,}\\.?)?|\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})?(?::\\d+)?(?:/?|[/?]\\S+)|((git|ssh|https?)|(git@[\\w\\.]+))(:(//)?)([\\w\\.@\\:/\\-~]+)(\\.git)(/)?)$"
      },
      "title": "Package sources",
      "description": "The list of package source in search order",
      "default": [ "git://github.com/mesosphere/universe.git" ],
      "additionalItems": false,
      "uniqueItems": true
    },
    "cache": {
      "type": "string",
      "title": "Package cache directory",
      "description": "Path to the local package cache directory",
      "default": "/tmp/cache"
    }
  },
  "additionalProperties": false,
  "required": ["sources", "cache"]
}