a.config

Node.js Config System

a.config - Node.js config system

Configuration system for Node.js Applications

Configuration system created for systematization of the configuration files. You can simply extend, edit and monipalte yours configs.

Wiki pages

Install using npm

project$ npm install a.config

You can write yours configs in js, json, yaml.

Example config file

# Inner vars 
$config:
 
  default.format.processor: 'default'
  default.format.value: '%level %date %args %code'
 
  production:
    mongo:
      uri: 'mongodb://localhost.loc:27017/log'
      ttl: 604800
      format:
        name: 'mongo'
        value: '%level, %module, %hostname, %args, %code, %trace, %errors'
 
  development:
    $extend: production # Extend production and change mongo.uri, mongo.ttl 
    mongo:
      uri: 'mongodb://localhost:27017/log'
      ttl: 600
 
  prog12:
    $extend: development # Extend development and change mongo.uri 
    mongo:
      uri: 'mongodb://localhost:27030/log'
 
# Logger System Configurations 
default:
  all:
    console: true
    syslog: true
 
production:
  $extend: default # Extend default and append app property 
  app:
    all,info,debug:
      mongo:
         $extend: :$config.production.mongo # Extend $config.production.mongo 
      console: true
    error,warn:
      mongo:
         $extend: :$config.production.mongo # Extend $config.production.mongo 
        syslog: true
      console: true
development:
  $extend: default # Extend default and update app property 
  app:
    $replace: :production.app # Extend from production.app, with full change same properties 
    all,info,debug:
      console: true  

Load configuration file

var config = require('a.config');
config.load(__dirname + '/config.yaml');

After config loading you can use this in all application

var config = require('a.config');
console.log(config.default.all);
 
//{console: true, syslog: true} 

For creation new instance of config object and load different config use newInstance()

var config = require('a.config');
config.load(__dirname + '/config.yaml');
 
var exConfig = config.newInstance();
exConfig.load(__dirname + '/config.ex.yaml');
 
console.log(config.default.all);
//{console: true, syslog: true} 
 
console.log(exConfig.default);
// 

Extends

For convenient use configurations used rashireniem:

  • $extend - Extend current object, you must specify the name of the object. You can use local name(objects in same level) or name from root. For root location use : before name of object.

    Example

    production:
      mongo:
        uri: 'mongodb://localhost.loc:27017/log'
        ttl: 604800
        format:
          name: 'mongo'
          value: '%level, %module, %hostname, %args, %code, %trace, %errors'
    
    development:
      $extend: production
      mongo:
        uri: 'mongodb://localhost:27017/log'
        ttl: 600
    
    user:
      mongo:
        $extend: :production.mongo
{
    "production": {
        "mongo": {
            "uri": "mongodb://localhost.loc:27017/log",
            "ttl": 604800,
            "format": {
                "name": "mongo",
                "value": "%level, %module, %hostname, %args, %code, %trace, %errors"
            }
        }
    },
    "development": {
        "mongo": {
            "uri": "mongodb://localhost:27017/log",
            "ttl": 600,
            "format": {
                "name": "mongo",
                "value": "%level, %module, %hostname, %args, %code, %trace, %errors"
            }
        }
    },
    "user": {
        "mongo": {
            "uri": "mongodb://localhost.loc:27017/log",
            "ttl": 604800,
            "format": {
                "name": "mongo",
                "value": "%level, %module, %hostname, %args, %code, %trace, %errors"
            }
        }
    }
}
  • $replace - Same as $extend, but it will rewrite all object

    Example

    production:
      mongo:
        uri: 'mongodb://localhost.loc:27017/log'
        ttl: 604800
        format:
          name: 'mongo'
          value: '%level, %module, %hostname, %args, %code, %trace, %errors'
    
    user:
      mongo:
        $replace: :production.mongo
        format:
          caption: 'caption'
{
    "production": {
        "mongo": {
            "uri": "mongodb://localhost.loc:27017/log",
            "ttl": 604800,
            "format": {
                "name": "mongo",
                "value": "%level, %module, %hostname, %args, %code, %trace, %errors"
            }
        }
    },
    "user": {
        "mongo": {
            "format": {
                "caption": "caption"
            },
            "uri": "mongodb://localhost.loc:27017/log",
            "ttl": 604800
        }
    }
}
  • $include - Include some else file into current object. Use path relative to the current config

    Example

    production:
      mongo:
        uri: 'mongodb://localhost.loc:27017/log'
        ttl: 604800
        format:
          name: 'mongo'
          value: '%level, %module, %hostname, %args, %code, %trace, %errors'
    
    user:
      mongo:
        $include: './configs/mongo.yaml'

May be freely distributed under the MIT license

See LICENSE file

Copyright (c) 2013 - Sumskoy Andrew andy@away.name