| 1 | /* global process */
|
| 2 | /** @module io */
|
| 3 |
|
| 4 | const { fnOrValue } = require('../logic');
|
| 5 | /** Returns and parses an environment var and if does not exists returns the default value
|
| 6 | * @argument {String} key key to get from our environment variables
|
| 7 | * @argument {*} defaultValue default value to be returned if key not found
|
| 8 | * @argument {Function} postProcessor process the value once getted.
|
| 9 | * @argument {Object} env io source to read environment vars from
|
| 10 | * @example
|
| 11 | * //No environment var
|
| 12 | * envOr('db','localhost'); //-> localhost
|
| 13 | * envOr('DB','localhost'); //-> localhost
|
| 14 | * //PORT=3000
|
| 15 | * envOr('port',8080); //-> 3000
|
| 16 | * envOr('port',8080,parseFloat); //-> 3000 (float)
|
| 17 | * @returns {*}
|
| 18 | * @method
|
| 19 | */
|
| 20 | const envOr = (key, defaultValue, postProcessor = x => x, { env } = process) => postProcessor(typeof key === 'string' && env && env[key.toUpperCase()]) || fnOrValue(defaultValue, key);
|
| 21 |
|
| 22 | module.exports = { envOr };
|