#Json env loader Small module that loads data from json files (like vault secrets) into process.env.

Inspired by dotenv

Install

npm install @prismamedia/ts-json-env-loader

Or

yarn add @prismamedia/ts-json-env-loader

Usage

Add your json config file to a folder accessible by your app As early as possible in your application, import and call the module:

import { loadEnvSync } from '@prismamedia/ts-json-env-loader'
loadEnvSync({ folder: "/path/to/json/folder"})
import express from 'express'

Keys are uppercased Keys are prefixed by the fileName Keys from multi level json are prefixed the parent key.

for file test.json

{
  "config_1": "a",
  "LEVEL_2": {
    "CONFIG_1": "aa",
    "CONFIG_2": "bb"
  }
}

Will load as

TEST_CONFIG_1="a"
TEST_LEVEL_2_CONFIG_1="aa"
TEST_LEVEL_2_CONFIG_2="bb"

Loading can be asynchronous using loadEnv

import { loadEnv } from '@prismamedia/ts-json-env-loader'
await loadEnv({ folder: "/path/to/json/folder"})

By default, non json file are ignored, you can raise an exception in those cases using the strict option By default, duplicate entries are ignored, you can raise an exception in those cases using the strict option

Files can be filtered by name using a regex with the excludeFolder or includeFolder options Entries can be filtered by (unprefixed) name using a regex with the excludeEntry or includeEntry options

import { loadEnvSync } from '@prismamedia/ts-json-env-loader'
loadEnvSync({ 
  folder: "/path/to/json/folder",
  strict: true,
  includeFolder: /^[_A-Za-z][_0-9A-Za-z]*$/,
  excludeFolder: /^[_A-Za-z][_0-9A-Za-z]*$/,
  includeEntry: /^[_A-Za-z][_0-9A-Za-z]*$/,
  excludeEntry: /^[_A-Za-z][_0-9A-Za-z]*$/,
  onDuplicateEntry: 'overwrite' | 'ignore' | 'throw'
})