Package description
The rc npm package is a configuration loader for Node.js applications. It allows you to configure your applications with files, environment variables, and command-line arguments. This package is particularly useful for creating flexible applications that can be easily configured without changing the codebase.
Loading configuration from a file
This feature allows you to load configuration for your application named 'appname' from a file. If the file does not exist, it falls back to the default configuration provided.
const config = require('rc')('appname', { defaultConfig: 'defaultValue' });Overriding configuration with environment variables
This demonstrates how to override a specific configuration option ('configOption') for 'appname' using an environment variable. The environment variable takes precedence over the default value.
process.env.appname_configOption = 'newValue';
const config = require('rc')('appname', { configOption: 'defaultValue' });Using command-line arguments to override configuration
This example shows how command-line arguments can be used to override the configuration in 'appname'. The command-line argument '--configOption newValue' overrides the default configuration.
// Run the application with: node app.js --configOption newValue
const config = require('rc')('appname', { configOption: 'defaultValue' });Similar to rc, the 'config' package is used for managing configuration settings for Node.js applications. It supports loading configurations from files and environment variables. Compared to rc, 'config' provides a more structured approach to defining default configurations and environment-specific overrides.
The 'dotenv' package is focused on loading environment variables from a .env file into process.env, providing a simple way to manage configuration settings. Unlike rc, dotenv does not support loading configurations from command-line arguments or merging configurations from multiple sources.
nconf is a hierarchical configuration management library for Node.js. It supports loading configuration from files, environment variables, command-line arguments, and even remote storage. nconf offers a more complex API compared to rc but provides greater flexibility in managing configurations from multiple sources.
Readme
the non configurable configuration loader for lazy people.
the only option is to pass rc the name of your app, and your default confugiration.
var rc = require('rc')(appname, {
//defaults go here.
port: 2468
})
Given your application name, rc will look in all the obvious places for configuration.
--config file then from that file$HOME/.${APPNAME}rc$HOME/.${APPNAME}/config$HOME/.config/${APPNAME}$HOME/.config/${APPNAME}/config/etc/${APPNAME}rc/etc/${APPNAME}/configAll configuration sources that where found will be flattened into one object, so that sources earlier in this list override later ones.
Configuration files may be in either json or ini format.
Since ini, and env variables do not have a standard for types,
your application needs be prepared for strings.
BSD
FAQs
hardwired configuration loader
We found that rc demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Application Security
New SEC disclosure rules aim to enforce timely cyber incident reporting, but fear of job loss and inadequate resources lead to significant underreporting.
Security News
The Python Software Foundation has secured a 5-year sponsorship from Fastly that supports PSF's activities and events, most notably the security and reliability of the Python Package Index (PyPI).
Security News
LDAPjs, an LDAP Client and Server API for Node.js, was decommissioned after its maintainer received an abusive email from a user, raising concerns about this form of abuse as a potential attack vector.