application-services

application-services

Out of the box application environment and configuration service.

Need to manage several environment and configurations for your knifecycle based app? This module is all what your need.

Features

Out of the box, standard compliant, application environment:

• accepting only standard NODE_ENV values: test, development, production,
• managing application environment in a clean and separate APP_ENV environment variable,
• leverage dotenv to read environment variables,
• manage separate and type checked applications configurations for each deployment environments and allows loading it automatically (in the ${PROJECT_SRC}/configs/${APP_ENV}/index file).

It requires log and importer services to be passed in, you can find implementations in the common-services project.

It also relies on constant services you will have to provide: APP_ENV, NODE_ENV and the PROJECT_SRC (directory where actual code is).

API

Constants

PROCESS_ENV Provides the PROCESS_ENV service : Object

Functions

extractAppEnv(appEnv, availableAppEnvs) ⇒

Cast any string into an application environment

initAppConfig(services) ⇒ Promise.<Object>

Initialize the APP_CONFIG service according to the APP_ENV

initENV(services) ⇒ Promise.<Object>

Initialize the ENV service using process env plus dotenv files

initProjectDirectory(services) ⇒ Promise.<Object>

Initialize the PROJECT_DIR service

PROCESS_ENV

Provides the PROCESS_ENV service : Object Kind: global constant

extractAppEnv(appEnv, availableAppEnvs) ⇒

Cast any string into an application environment

Kind: global function
Returns: string

Param	Description
appEnv	string
availableAppEnvs	string[]

initAppConfig(services) ⇒ Promise.<Object>

Initialize the APP_CONFIG service according to the APP_ENV

Kind: global function
Returns: Promise.<Object> - A promise of a an object the actual configuration properties.

Param	Type	Default	Description
services	Object		The services APP_CONFIG depends on
services.APP_ENV	Object		The injected APP_ENV value
services.PROJECT_SRC	Object		The project source directory
services.importer	Object		A service allowing to dynamically import ES modules
[services.log]	Object	noop	An optional logging service

initENV(services) ⇒ Promise.<Object>

Initialize the ENV service using process env plus dotenv files

Kind: global function
Returns: Promise.<Object> - A promise of an object containing the actual env vars.

Param	Type	Default	Description
services	Object		The services ENV depends on
services.NODE_ENV	Object		The injected NODE_ENV value to look for .env.${NODE_ENV} env file
services.PROJECT_DIR	Object		The NodeJS project directory
[services.BASE_ENV]	Object	{}	An optional base environment
[services.log]	Object	noop	An optional logging service

initProjectDirectory(services) ⇒ Promise.<Object>

Initialize the PROJECT_DIR service

Kind: global function
Returns: Promise.<Object> - A promise of a an object the actual configuration properties.

Param	Type	Default	Description
services	Object		The services PROJECT_DIR depends on
[services.log]	Object	noop	An optional logging service

Authors

• Nicolas Froidure

License

MIT

Changelog

3.0.0 (2023-08-16)

Bug Fixes

• core: env evaluation order (cd046ac)