json-config-ext

By Roman Lo

An extensible json configuration plugin for nodejs.

Installation

json-config-ext is available on NPM. You can install json-config-ext simply by enter the following command:

npm install --save json-config-ext

Usage

// load from file `${process.env.cwd()}/config/config.json`
var config = require('json-config-ext').config;

Advanced Topic

Environment Configuration

As default, json-config-ext will try to get the config/config.json under the process.cwd() directory. But you can set/modify the following environment parameters to tell this plugin to load the specific configurations.

process.env.NODE_ENV

The node environment stands for the suffix of the configuration file.

For example, when process.env.NODE_ENV is set to prod, plugin will try to load config.prod.json under the default configuration directory.

process.env.CONF_EXT_DIR

CONF_EXT_DIR indicates the configuration directory location. It supports both absolute path or relative path. Find out more in the following samples:

1. Absolute path sample

   As:

   process.env.CONF_EXT_DIR = '/etc/yourapp/config';

   Then:

   // load from file `/etc/yourapp/config/config.json`
   require('json-config-ext').config;

2. Relative path sample

   As:

   process.env.CONF_EXT_DIR = './myconfig';

   Then:

   // load from file `${process.env.cwd()}/myconfig/config.json`
   require('json-config-ext').config;

process.env.CONF_EXT_NAME

CONF_EXT_NAME indicates the configuration file name. By the default, the configuration file name is config, and the plugin will load config.${NODE_ENV}.json. By changing the CONF_EXT_NAME, you can load different configuration files. Here is an example:

// set the configuration file name to `myconf`
process.env.CONF_EXT_NAME = 'myconf';

// load from file `${process.env.cwd()}/config/myconf.json`
var config = require('json-config-ext').config;

Extensive JSON

Calling the Json extensively, this means Json can be extended/inherited between each others. This is also the main spotlight feature of this plugin.

Here, I introduce three reserved keywords within the root level of the json file:

1. __name

   The __name keyword is use to declare the name of the json file/object, which can be use in the __extends array.

2. __extends

   The __extends array tells the plugin to load and merge the specific json files in a preset order(order by the index ascendingly).

   You can put

3. __excludes

   The __excludes array tells the plugin not to load the specific json files, through out the whole loading process.

   NOTICE: I didn't implements this feature yet.

No words could more straight than seeing the code to know how to extends your json files. Let go to the advanced-usage example and take a look at this awesome feature!

Contributions

Contributions are super welcome here! If you have any good idea about this project, please feel free to let me know.

You can contact me by this e-mail: [email protected]

Or just leave a message on the issue page :)